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1.

About the generalized Dirichlet-Neumann problem for an elliptic equation of high order         

DOI:10.1063/1.5049007

For the elliptic equation 2l- th order with constant (and only) real coefficients considered boundary value problem of the job normal derivatives the (kj - 1)- order, j = 1, ⋯, l, where 1 ≤ k1< ⋯

Koshanov B., Soldatov A. . About the generalized Dirichlet-Neumann problem for an elliptic equation of high order // AIP Conference Proceedings. - 2018. - Vol.1997.    

DOI:10.1063/1.5049007

 

2

New boundary value problems for fourth-order quasi-hyperbolic equations

DOI:10.33048/SEMI.2019.16.098

In this paper, we study the correctness in the spaces of S.L. Sobolev of new boundary value problems for quasi-hyperbolic differential equations utttt + Au = f(x; t) (A is an elliptic operator acting on spatial variables). For the proposed tasks theorems on the existence and uniqueness of solutions are proved, and examples of non-uniqueness are given.

Kozhanov A.I., Koshanov B., Sultangazieva J. New boundary value problems for fourth-order quasi-hyperbolic equations // Siberian Electronic Mathematical Reports. – 2019. - Vol.16. – Р. 1410 – 1436.

DOI:10.33048/SEMI.2019.16.098  

3

On Fredholm solvability and on the index of the generalized Neumann problem for an elliptic equation

DOI:10.1080/17476933.2021.1958797

In this paper, we investigate the Fredholm solvability of the generalized Neumann problem for a high-order elliptic equation in the plane. The equivalence of the solvability conditions of the generalized Neumann problem to the complementarity condition (Shapiro–Lopatinsky condition) is proved. The formula for the index of the specified problem in the class (Formula presented.) is calculated. © 2021 Informa UK Limited, trading as Taylor & Francis Group.

Koshanov B., Soldatov A. . On Fredholm solvability and on the index of the generalized Neumann problem for an elliptic equation // Complex Variables and Elliptic Equations. – 2021. - Р. 1-17.

4

A numerical simulation of air flow in the human respiratory system for various environmental conditions

DOI: 10.1186/s12976-020-00133-8

The functions of the nasal cavity are very important for maintaining the internal environment of the lungs since the inner walls of the nasal cavity control the temperature and saturation of the inhaled air with water vapor until the nasopharynx is reached. In this paper, three-dimensional computational studies of airflow transport in the models of the nasal cavity were carried out for the usual inspiratory velocity in various environmental conditions. Three-dimensional numerical results are compared with experimental data and calculations of other authors. Numerical results show that during normal breathing, the human nose copes with heat and relative moisture metabolism in order to balance the intra-alveolar conditions. It is also shown in this paper that a normal nose can maintain balance even in extreme conditions, for example, in cold and hot weather. The nasal cavity accelerates heat transfer by narrowing the air passages and swirls from the nasal concha walls of the inner cavity. © 2020, The Author(s).

Issakhov A., Zhandaulet Y., Issakhov A., Abylkassymova A. . A numerical simulation of air flow in the human respiratory system for various environmental conditions // Theoretical Biology and Medical Modelling. - 2021. - Vol.18.

DOI: 10.1186/s12976-020-00133-8

4

Solvability issues of a pseudo‐parabolic fractional order equation with a nonlinear boundary condition

DOI: 10.3390/fractalfract5040134

This paper is devoted to the fundamental problem of investigating the solvability of ini-tial‐boundary value problems for a quasi‐linear pseudo‐parabolic equation of fractional order with a sufficiently smooth boundary. The difference between the studied problems is that the boundary conditions are set in the form of a nonlinear boundary condition with a fractional differentiation operator. The main result of this work is establishing the local or global solvability of stated prob-lems, depending on the parameters of the equation. The Galerkin method is used to prove the existence of a quasi‐linear pseudo‐parabolic equation’s weak solution in a bounded domain. Using Sobolev embedding theorems, a priori estimates of the solution are obtained. A priori estimates and the Rellich–Kondrashov theorem are used to prove the existence of the desired solutions to the considered boundary value problems. The uniqueness of the weak generalized solutions of the initial boundary value problems is proved on the basis of the obtained a priori estimates and the application of the generalized Gronwall lemma. The need to consider and study such initial boundary value problems for a quasi‐linear pseudo‐parabolic equation follows from practical re-quirements, such as solving fractional differential equations that simulate physical processes that occur during the study of liquid filtration processes, etc. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Aitzhanov S.E.,

Berdyshev A.S., Bekenayeva K.S. Solvability issues of a pseudo‐parabolic fractional order equation with a nonlinear boundary condition // Fractal and Fractional. - 2021. - Vol.5.

DOI: 10.3390/fractalfract5040134

 

 

5

Van der Corput lemmas for Mittag-Leffler functions. II. α–directions

DOI

10.1016/j.bulsci.2021.103016

The paper is devoted to study analogues of the van der Corput lemmas involving Mittag-Leffler functions. The generalisation is that we replace the exponential function with the Mittag-Leffler-type function, to study oscillatory integrals appearing in the analysis of time-fractional partial differential equations. More specifically, we study integral of the form Iα,β(λ)=∫REα,β(iαλϕ(x))ψ(x)dx, for the range 0[removed]0. This extends the variety of estimates obtained in the first part, where integrals with functions Eα,β(iλϕ(x)) have been studied. Several generalisations of the van der Corput lemmas are proved. As an application of the above results, the generalised Riemann-Lebesgue lemma, the Cauchy problem for the time-fractional Klein-Gordon and time-fractional Schrödinger equations are considered. © 2021 The Authors

Ruzhansky M.,Torebek B.T. . Van der Corput lemmas for Mittag-Leffler functions. II. α–directions // Bulletin des Sciences Mathematiques. – 2021. - Vol.171.

6

On a model of the generation of turbulence

DOI: 10.1016/j.chaos.2021.111099

In this article, the nonlinear term of the Navier-Stokes equation is approximated to nonlinear convolutional expressions. At low values of viscosity, their values are close if the carrier of the convolution is of the same order of magnitude as the value of viscosity. It is expected that the dynamics of the thus obtained modified Navier-Stokes equation preserves the physical phenomena described by the Navier-Stokes equation. The dynamics of the modified Navier-Stokes equation is investigated in this work. © 2021 Elsevier Ltd

Kanguzhin B.E. . On a model of the generation of turbulence // Chaos, Solitons and Fractals. – 2021. - Vol.150.

DOI: 10.1016/j.chaos.2021.111099

7

An inverse problem for generalized Kelvin-Voigt equation with p-Laplacian and damping term

DOI

10.1088/1361-6420/ac1362

In this paper, we consider the nonlinear inverse problem for generalized Kelvin-Voigt equations with the p-Laplace diffusion and damping term, describing the motion of incompressible viscous fluids. We assume that the damping term in the momentum equation depends on whether its signal is positive or negative, which may realizes the presence of a source or a sink within the system. The investigated inverse problem consists of finding a coefficient f(t) of the right-hand side of the momentum equation, a vector of velocity field v, and a pressure π. An additional information on a solution of the inverse problem is given as integral overdetermination condition. Under several assumptions on the exponents p, m, the coefficients μ, κ, γ, the dimension of the space d, and specified initial data, we prove the existence and uniqueness of the weak solution of the problem. © 2021 IOP Publishing Ltd.

Antontsev S.N., Khompysh K. . An inverse problem for generalized Kelvin-Voigt equation with p-Laplacian and damping term // Inverse Problems. – 2021. - Vol.37.

DOI

10.1088/1361-6420/ac1362

8

Identification of the domain of the sturm–liouville operator on a star graph

DOI

10.3390/sym13071210

This article is devoted to the unique recovering of the domain of the Sturm–Liouville operator on a star graph. The domain of the Sturm–Liouville operator is uniquely identified from the set of spectra of a finite number of specially selected canonical problems. In the general case, the domain of the definition of the original operator can be specified by integro-differential linear forms. In the case when the domain of the Sturm–Liouville operator on a star graph corresponds to the boundary value problem, it is sufficient to choose only finite parts of the spectra of canonical problems for a unique identification of the boundary form. Moreover, the above statement is valid only for a symmetric star graph. © 2021 by the authors.

Kanguzhin B., Aimal Rasa G.H., Kaiyrbek Z. . Identification of the domain of the sturm–liouville operator on a star graph // Symmetry. – 2021. - Vol.13.

DOI

10.3390/sym13071210

9

On the localization of the spectrum of some perturbations of a two-dimensional harmonic oscillator

DOI:10.1080/17476933.2021.1885386

In this paper, we study the localization of the discrete spectrum of certain perturbations of a two-dimensional harmonic oscillator. The convergence of the expansion of the source function in terms of the eigenfunctions of a two-dimensional harmonic oscillator is investigated. A representation of Green's function of a two-dimensional harmonic oscillator is obtained. The singularities of Green's function are highlighted. The well-posed definition of the maximal operator generated by a two-dimensional harmonic oscillator on a specially extended domain of definition is given. Then, we describe everywhere solvable invertible restrictions of the maximal operator. We establish that the eigenvalues of a harmonic oscillator will also be the eigenvalues of well-posed restrictions. The results are supported by illustrative examples. © 2021 Informa UK Limited, trading as Taylor & Francis Group.

Kanguzhin B.E., Fazullin Z. . On the localization of the spectrum of some perturbations of a two-dimensional harmonic oscillator // Journal of Mathematical Sciences (United States). – 2021. . - Vol.66. – Р. 1194 - 1208.

DOI:10.1080/17476933.2021.1885386

10

Operators Whose Resolvents Have Convolution Representations and their Spectral Analysis

DOI

10.1007/s10958-020-05167-4

In this paper, we study spectral decompositions with respect to a system of generalized eigenvectors of second-order differential operators on an interval whose resolvents possess convolution representations. We obtain the convolution representation of resolvents of second-order differential operators on an interval with integral boundary conditions. Then, using the convolution generated by the initial differential operator, we construct the Fourier transform. A connection between the convolution operation in the original functional space and the multiplication operation in the space of Fourier transforms is established. Finally, the problem on the convergence of spectral expansions generated by the original differential operator is studied. Examples of convolutions generated by operators are also presented. © 2021, Springer Science+Business Media, LLC, part of Springer Nature.

Kanguzhin B.E.. Operators Whose Resolvents Have Convolution Representations and their Spectral Analysis // Journal of Mathematical Sciences (United States). – 2021. . - Vol.252. – Р. 384 - 398.

DOI: 10.1007/s10958-020-05167-4

11

Identification of mathematical model of bacteria population under the antibiotic influence

DOI

10.1515/jiip-2017-0102

This work is devoted to the identification of a mathematical model of bacteria population under the antibiotic influence, based on the solution of the corresponding inverse problems. These problems are solved by the gradient method, genetic algorithm and Nelder-Mead method. Calculations are made using model and real data. © 2020 De Gruyter.

Serovajsky S., Nurseitov D., Kabanikhin S., Azimov A., Ilin A., Islamov R.. Identification of mathematical model of bacteria population under the antibiotic influence // Journal of Inverse and Ill-Posed Problems. – 2021. - Vol.26. – Р. 384 - 398.

DOI: 10.1515/jiip-2017-0102.

12

On One Algorithm To Find a Solution to a Linear Two-Point Boundary Value Problem

DOI

10.1134/S1995080221030173

Abstract: A two-parameter family of algorithms for finding an approximatesolution to a linear two-point boundary value problem for a systemof ordinary differential equations is offered. The convergenceconditions for the algorithms are obtained. The necessary andsufficient coefficient conditions for the well-posedness ofconsidered problem are established. © 2021, Pleiades Publishing, Ltd.

Temesheva S.M., Dzhumabaev D.S, Kabdrakhova S.S. . On One Algorithm To Find a Solution to a Linear Two-Point Boundary Value Problem // Lobachevskii Journal of Mathematics. – 2021. - Vol.42. – Р. 606 - 612.

DOI: 10.1134/S1995080221030173.

13

The classical Kelvin-Voigt problem for incompressible fluids with unknown non-constant density: Existence, uniqueness and regularity

DOI

10.1088/1361-6544/abe51e

The classical Kelvin-Voigt equations for incompressible fluids with non-constant density are investigated in this work. To the associated initial-value problem endowed with zero Dirichlet conditions on the assumed Lipschitz-continuous boundary, we prove the existence of weak solutions: velocity and density. We also prove the existence of a unique pressure. These results are valid for d ∈ {2, 3, 4}. In particular, if d ∈ {2, 3}, the regularity of the velocity and density is improved so that their uniqueness can be shown. In particular, the dependence of the regularity of the solutions on the smoothness of the given data of the problem is established. © 2021 IOP Publishing Ltd & London Mathematical Society.

Antontsev S.N., De Oliveira H.B., Khompysh K. . The classical Kelvin-Voigt problem for incompressible fluids with unknown non-constant density: Existence, uniqueness and regularity // Nonlinearity. – 2021. - Vol.34. – Р. 3083 – 3111.

DOI: 10.1088/1361-6544/abe51e.

14

Kelvin-Voigt equations with anisotropic diffusion, relaxation and damping: Blow-up and large time behavior

DOI

10.3233/ASY-201597

A nonlinear initial and boundary-value problem for the Kelvin-Voigt equations with anisotropic diffusion, relaxation and absorption/damping terms is considered in this work. The global and local unique solvability of the problem was established in (J. Math. Anal. Appl. 473(2) (2019) 1122-1154). In the present work, we show how all the anisotropic exponents of nonlinearity and all anisotropic coefficients should interact with the problem data for the solutions of this problem display exponential and polynomial time-decays. We also establish the conditions for the solutions of this problem to blow-up in a finite time in three different cases: problem without convection, full anisotropic problem, and the problem with isotropic relaxation. © 2021 - IOS Press. All rights reserved.

Antontsev S.N., De Oliveira H.B., Khompysh K. . Kelvin-Voigt equations with anisotropic diffusion, relaxation and damping: Blow-up and large time behavior // Asymptotic Analysis. – 2021. - Vol.121. – Р. 125 - 157.

DOI: 10.3233/ASY-201597

15

Punctual Dimension of Algebraic Structures in Certain Classes

DOI: 10.1134/S1995080221040089

A nonlinear initial and boundary-value problem for the Kelvin-Voigt equations with anisotropic diffusion, relaxation and absorption/damping terms is considered in this work. The global and local unique solvability of the problem was established in (J. Math. Anal. Appl. 473(2) (2019) 1122-1154). In the present work, we show how all the anisotropic exponents of nonlinearity and all anisotropic coefficients should interact with the problem data for the solutions of this problem display exponential and polynomial time-decays. We also establish the conditions for the solutions of this problem to blow-up in a finite time in three different cases: problem without convection, full anisotropic problem, and the problem with isotropic relaxation. © 2021 - IOS Press. All rights reserved.

Dorzhieva, M.V.,Issakhov, A.A., Kalmurzayev, B.S., Kornev, R.A., Kotov, M.V. . Punctual Dimension of Algebraic Structures in Certain Classes // Lobachevskii Journal of Mathematics. – 2021. - Vol. 42. – Р. 716 - 725.

DOI: 10.1134/S1995080221040089

16

Non-commutative analogues of weak compactness criteria in symmetric spaces

DOI

10.1007/s43036-021-00129-2

The aim of this work is to study M. Nowak’s and K. M. Chong’s weak compactness criteria in non-commutative Orlicz spaces. In addition, we obtain a non-commutative analogue of Pełczyński’s property (V) in Orlicz spaces of τ-measurable operators. We also obtain Kolmogorov’s compactness criterion in terms of conditional expectations in non-commutative symmetric spaces. © 2021, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.

Nessipbayev Y., Sukochev F., Tulenov K. . Non-commutative analogues of weak compactness criteria in symmetric spaces // Advances in Operator Theory. – 2021. - Vol. 6.

DOI: 10.1007/s43036-021-00129-2

17

The boundedness of the Hilbert transformation from one rearrangement invariant Banach space into another and applications

DOI

10.1016/j.bulsci.2020.102943

In this paper, we study the boundedness of the Hilbert transformation in Lorentz function spaces, thereby complementing classical results of Boyd. We also characterize the optimal range of a triangular truncation operator in Schatten-Lorentz ideals. These results further entail sharp commutator estimates and applications to operator Lipschitz functions in Schatten-Lorentz ideals. © 2020 Elsevier Masson SAS

Zanin D., Sukochev F., Tulenov K. . The boundedness of the Hilbert transformation from one rearrangement invariant Banach space into another and applications // Bulletin des Sciences Mathematiques. – 2021. - Vol. 167.

DOI: 10.1016/j.bulsci.2020.102943

18

OPTIMAL REARRANGEMENT-INVARIANT BANACH FUNCTION RANGE FOR THE HILBERT TRANSFORM

DOI

10.32523/2077-9879-2021-12-2-90-103

We describe the optimal rearrangement-invariant Banach function range of the classical Hilbert transform acting on a rearrangement-invariant Banach function space. We also show the existence of such optimal range for the Lorentz and Marcinkiewicz spaces. © 2021. The L.N. Gumilyov Eurasian National University.

Tulenov K. . OPTIMAL REARRANGEMENT-INVARIANT BANACH FUNCTION RANGE FOR THE HILBERT TRANSFORM // Eurasian Mathematical Journal. – 2021.   - Vol. 12. – Р. 01 – 23.

DOI: 10.32523/2077-9879-2021-12-2-90-103

19

Asymptotic behavior of the solution of a singularly perturbed general boundary value problem with boundary jumps

DOI

10.1002/num.22719

It is known that the study of boundary value and mixed problems for integrable linear equations encounters significant difficulties of a fundamental nature. Exceptions are problems with boundary conditions of a special type, which are often called integrable or linearizable. The purpose of this article is to study the asymptotic behaviors of solutions of singularly perturbed general boundary value problems with boundary jumps for higher-order equations. Using the Schlesinger–Birghof theorem, we constructed a fundamental system of solutions of a homogeneous perturbed equation of conditionally stable type in the critical case. Initial boundary functions are constructed based on the fundamental system of solutions. An analytical representation is found, the existence and uniqueness of a solution to this boundary value problem are proved. Asymptotic estimates of the solution and its derivatives are derived from the analytical representation of the solution of the given boundary value problem. The limit passage of solution of the perturbed problem to the solution of the unperturbed problem is proved. The conditions of the existence of jumps are found. The values of boundary jumps are determined. As a result, a class of boundary value problems is highlighted that has possessing of phenomenon of boundary jumps. © 2020 Wiley Periodicals LLC

Nurgabyl D.N., Uaissov A.B. . Asymptotic behavior of the solution of a singularly perturbed general boundary value problem with boundary jumps // Numerical Methods for Partial Differential Equations. – 2021. - Vol. 37. – Р. 2375 - 2392.

DOI: 10.1002/num.22719.

20

Integral Representations of Vector Functions Based on the Parametrix of First-Order Elliptic Systems

DOI

10.1134/S0965542521030143

Abstract: Generalized integrals are introduced with kernels depending on the difference of the arguments taken over a domain and a smooth contour, the boundary of this domain. These kernels arise as parametrixes of first-order elliptic systems with variable coefficients. Using such integrals (with complex density over the domain and real density over the contour), representations of vector functions that are smooth in the closed domain are described. The Fredholmity of the representation obtained in the corresponding Banach spaces is established. © 2021, Pleiades Publishing, Ltd.

Soldatov A.P., Otelbaev M.. Integral Representations of Vector Functions Based on the Parametrix of First-Order Elliptic Systems // Computational Mathematics and Mathematical Physics. – 2021.   - Vol. 61. – Р. 964 - 973.

DOI: 10.1002/num.22719.

21

On Green’s function of Cauchy–Dirichlet problem for hyperbolic equation in a quarter plane

DOI

10.1186/s13661-021-01544-3

The definition of a Green’s function of a Cauchy–Dirichlet problem for the hyperbolic equation in a quarter plane is given. Its existence and uniqueness have been proven. Representation of the Green’s function is given. It is shown that the Green’s function can be represented by the Riemann–Green function. © 2021, The Author(s).

Sadybekov M., Derbissaly B. .On Green’s function of Cauchy–Dirichlet problem for hyperbolic equation in a quarter plane // Boundary Value Problems. – 2021. - Vol. 2021.

DOI: 10.1186/s13661-021-01544-3.

22

Boundary Conditions of Volume Hyperbolic Potential in a Domain with Curvilinear Boundary

DOI

10.1007/978-3-030-69292-6_20

A one-dimensional volume hyperbolic potential in a domain with curvilinear boundaries is studied. As a kernel of the hyperbolic potential the fundamental solution of the Cauchy problem is chosen. It is well-known that in this case the volume hyperbolic potential satisfies homogeneous initial conditions. The boundary conditions to which the hyperbolic potential satisfies at lateral boundaries of the domain are constructed. It is shown that the formulated initial-boundary value problem has the unique classical solution. © 2021, Springer Nature Switzerland AG.

Sadybekov M., Derbissaly B. . Boundary Conditions of Volume Hyperbolic Potential in a Domain with Curvilinear Boundary // Springer Proceedings in Mathematics and Statistics. – 2021. - Vol. 351. - Р. 257 – 271.

DOI: 10.1007/978-3-030-69292-6_20

23

Optimal Cubature Formulas on Classes of Periodic Functions in Several Variables

DOI

10.1134/S0081543821010028

Abstract: We establish sharp order estimates for the error of optimal cubature formulas on the Nikol’skii–Besov and Lizorkin–Triebel type spaces, $$B^{s\,\mathtt{m}}_{p\,q}(\mathbb T^m)$$ and $$L^{s\,\mathtt{m}}_{p\,q}(\mathbb T^m)$$, respectively, for a number of relations between the parameters $$s$$, $$p$$, $$q$$, and $$\mathtt{m}$$ ($$s=(s_1,\dots,s_n)\in\mathbb R^n_+$$, $$1\leq p,q\leq\infty$$, $$\mathtt{m}=(m_1,\dots,m_n)\in{\mathbb N}^n$$, $$m=m_1+\dots+m_n$$). Lower estimates are proved via Bakhvalov’s method. Upper estimates are based on Frolov’s cubature formulas. © 2021, Pleiades Publishing, Ltd.

Bazarkhanov D.B. . Optimal Cubature Formulas on Classes of Periodic Functions in Several Variables // Proceedings of the Steklov Institute of Mathematics. – 2021. - Vol. 312. - Р. 16 - 36.

DOI: 10.1134/S0081543821010028

24

Mixed convection in a channel with buoyancy force over backward and forward facing steps: The effects of inclination and geometry

DOI

10.1016/j.csite.2021.101152

This paper presents the computational results of heat transfer for a 2D laminar flow with different channel tilts with forward facing step and backward facing step, taking into account buoyancy forces for various bottom wall lengths. The inclination angle influence on the distribution of velocity and temperature is investigated. The validated numerical algorithm was used to the problem forward and backward facing steps with buoyancy force and at various tilt angles. From the obtained numerical results, it can be noticed that the length of the lower part of the channel has a very strong effect on the flow fluctuation and temperature distribution over the entire channel. It should be noticed that the tilt angle also has a very strong effect on the distribution of flow and temperature. Thus, taking into account the buoyancy force changes the shape of the main recirculation region, but at the same time, regardless of the different tilt angles, the number of vortices does not change, but only the size of the vortices changes. It should also be noticed that when the buoyancy force is taken into account, cooling occurs more efficiently in the middle of the channel. © 2021

Issakhov A., Zhandaulet Y., Abylkassyomova A., Sakypbekova M., Issakhov A.. Mixed convection in a channel with buoyancy force over backward and forward facing steps: The effects of inclination and geometry // Case Studies in Thermal Engineering. – 2021. - Vol. 26.

DOI: 10.1016/j.csite.2021.101152

25

Principal frequency of p-sub-Laplacians for general vector fields

DOI

10.4171/ZAA/1674

In this paper, we prove the uniqueness and simplicity of the principal frequency (or the first eigenvalue) of the Dirichlet p-sub-Laplacian for general vector fields. As a byproduct, we establish the Caccioppoli inequalities and also discuss the particular cases on the Grushin plane and on the Heisenberg group. © European Mathematical Society

Ruzhansky M., Sabitbek B., Suragan D. . Principal frequency of p-sub-Laplacians for general vector fields // Zeitschrift fur Analysis und ihre Anwendung. – 2021. - Vol. 40. – Р. 97 – 109.

DOI: 10.4171/ZAA/1674

26

Geometric Hardy Inequalities on Starshaped Sets

ISSN

09446532

We present geometric Hardy inequalities on starshaped sets in Carnot groups. Also, we obtain geometric Hardy inequalities on half-spaces for general vector fields. © Heldermann Verlag

Ruzhansky M., Sabitbek B., Suragan D. . Geometric Hardy Inequalities on Starshaped Sets s // Journal of Convex Analysis. – 2021. - Vol. 28.

 

27

Sobolev, Hardy, Gagliardo–Nirenberg, and Caffarelli–Kohn–Nirenberg-type inequalities for some fractional derivatives

 

DOI

10.1007/s43037-020-00097-4

In this paper, we show different inequalities for fractional-order differential operators. In particular, the Sobolev, Hardy, Gagliardo–Nirenberg, and Caffarelli–Kohn–Nirenberg-type inequalities for the Caputo, Riemann–Liouville, and Hadamard derivatives are obtained. In addition, we show some applications of these inequalities. © 2020, Tusi Mathematical Research Group (TMRG).

Kassymov A., Ruzhansky M., Tokmagambetov N., Torebek B.T.. Sobolev, Hardy, Gagliardo–Nirenberg, and Caffarelli–Kohn–Nirenberg-type inequalities for some fractional derivatives // Banach Journal of Mathematical Analysis. – 2021. - Vol. 15.

DOI: 10.1007/s43037-020-00097-4

28

Cauchy type problems for fractional differential equations

DOI

10.1080/10652469.2021.1900174

While it is known that one can consider the Cauchy problem for evolution equations with Caputo derivatives, the situation for the initial value problems for the Riemann–Liouville derivatives is less understood. In this paper, we propose new type initial, inner, and inner-boundary value problems for fractional differential equations with the Riemann–Liouville derivatives. The results on the existence and uniqueness are proved, and conditions on the solvability are found. The well-posedness of the new type of initial, inner, and inner-boundary conditions is also discussed. Moreover, we give explicit formulas for the solutions. As an application fractional partial differential equations for general positive operators are studied. © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

Karimov E., Ruzhansky M., Tokmagambetov N. . Sobolev, Hardy, Gagliardo–Nirenberg, and Caffarelli–Kohn–Nirenberg-type inequalities for some fractional derivatives // Integral Transforms and Special Functions. – 2021.

DOI: 10.1080/10652469.2021.1900174

29

Direct and inverse problems for time-fractional pseudo-parabolic equations

DOI

10.2989/16073606.2021.192832

The purpose of this paper is to establish the solvability results to direct and inverse problems for time-fractional pseudo-parabolic equations with the self-adjoint operators. We are especially interested in proving existence and uniqueness of the solutions in the abstract setting of Hilbert spaces. © 2021 NISC (Pty) Ltd.

Serikbaev D., Ruzhansky M., Tokmagambetov N., Torebek B.T. . Direct and inverse problems for time-fractional pseudo-parabolic equations // Quaestiones Mathematicae. – 2021.

DOI: 2989/16073606.2021.192832

30

Fractional Klein-Gordon equation with singular mass

DOI

10.1016/j.chaos.2020.110579

We consider a space-fractional wave equation with a singular mass term depending on the position and prove that it is very weak well-posed. The uniqueness is proved in some appropriate sense. Moreover, we prove the consistency of the very weak solution with classical solutions when they exist. In order to study the behaviour of the very weak solution near the singularities of the coefficient, some numerical experiments are conducted where the appearance of a wall effect for the singular masses of the strength of δ2 is observed. © 2020

Altybay A., Ruzhansky M., Tokmagambetov N., Sebih M.E. . Fractional Klein-Gordon equation with singular mass // Chaos, Solitons and Fractals. – 2021. - Vol. 143.

DOI: 10.1016/j.chaos.2020.110579

31

Fractional Schrödinger Equation with Singular Potentials of Higher Order

DOI

10.1016/S0034-4877(21)00016-1

In this paper the space-fractional Schrödinger equations with singular potentials are studied. Delta like or even higher-order singularities are allowed. By using the regularising techniques, we introduce a family of ‘weakened’ solutions, calling them very weak solutions. The existence, uniqueness and consistency results are proved in an appropriate sense. Numerical simulations are done, and a particles accumulating effect is observed in the singular cases. From the mathematical point of view a “splitting of the strong singularity” phenomena is also observed. © 2021 Polish Scientific Publishers

Altybay A., Ruzhansky M., Tokmagambetov N., Sebih M.E. . Fractional Schrödinger Equation with Singular Potentials of Higher Order // Reports on Mathematical Physics. – 2021. - Vol. 87. – Р. 129 – 144.

DOI: 10.1016/S0034-4877(21)00016-1

32.

Electrodeposition of polymer electrolyte in nanostructured electrodes for enhanced electrochemical performance of thin-film Li-ion microbatteries            

DOI: 10.1016/j.jpowsour.2016.11.078            

(IF=7,467; Q1 in Chemistry, Physical).

ABSTRACT :

We report that electrodeposition of polymer electrolyte in nanostructured electrodes has a strong influence on the electrochemical properties of thin-film Li-ion microbatteries. Electropolymerization of PMMA-PEG (polymethyl methacrylate-polyethylene glycol) was carried out on both the anode (self-supported titania nanotubes) and the cathode (porous LiNi0.5Mn1.5O4) by cyclic voltammetry and the resulting electrode-electrolyte interface was examined by scanning electron microscopy. The electrochemical characterizations performed by galvanostatic experiments reveal that the capacity values obtained at different C-rates are doubled when the electrodes are completely filled by the polymer electrolyte.

 

Salian, G.D., Lebouin, C., Demoulin, A., Lepihin, M.S., Maria, S., Galeyeva, A.K., Kurbatov, A.P., Djenizian, T.

Electrodeposition of polymer electrolyte in nanostructured electrodes for enhanced electrochemical performance of thin-film Li-ion microbatteries. //Journal of Power Sources. – 2017. – Vol.340. – P.242-236

DOI: 10.1016/j.jpowsour.2016.11.078            

 

33

Numerical heat transfer simulation of solar-geothermal hybrid source heat pump in Kazakhstan climates

DOI:10.1016/j.renene.2019.06.102

(SJR 0,18 ; Q4, Procentile 15 (General Chemistry)).

A numerical energy balance model has been proposed in this work for predicting the thermal performances of solar-geothermal hybrid source heat pumps in winter climates of Kazakhstan. The numerical simulation was performed for the year round continental climate conditions. The energy balance model has been developed based on first law of thermodynamics. The proposed heat pump configuration is working in solar mode during sunshine hours and geothermal model during off sunshine hours. Moreover, the system is operating in solar-geothermal hybrid model to meet the evaporator load during insufficient availability of solar and geothermal sources. The energy performance comparison between conventional geothermal source and solar-ground hybrid source heat pump configurations has been made. The influences of solar intensity, ambient temperature, heat pump operating temperatures are discussed. © 2018 Bulgarian Academy of Sciences.

 

@article{article,

author = {Yerdesh, Yelnar and Abdulina, Zarina and Aliuly, Abdurashid and Belyayev, Yerzhan and Mohanraj, M. and Kaltayev, Aidarkhan},

year = {2019},

month = {06},

pages = {},

title = {Numerical simulation on solar collector and cascade heat pump combi water heating systems in Kazakhstan climates},

volume = {145},

journal = {Renewable Energy},

doi = {10.1016/j.renene.2019.06.102}

}

34

Modelling of turbulence energy decay based on hybrid methods

DOI: 10.1108/EC-11-2016-0395

0.313; Q3; Procentile 63 (General Engineering), 52 (Computational Theory and Mathematics), 47 (Computer Science Applications). 35 (Software))

 

 

The purpose of this study is to present an exact and fast-calculated algorithm for the modelling of turbulent energy decay based on two different methods: finite-difference and spectral methods. Design/methodology/approach: The filtered three-dimensional non-stationary Navier–Stokes equation is used for simulating the turbulent process. The problem is solved using hybrid methods, where the equation of motion is solved using finite difference methods in combination with cyclic penta-diagonal matrix, which allowed to reach high order of accuracy, and Poisson equation is solved using the spectral methods, which is proposed to speed up the solution procedure. For validation of the given algorithm, the turbulent characteristics were compared with the exact solution of the classical Taylor and Green vortex problem, showing good agreement. Findings: The proposed method shows high computational efficiency and good estimation quality. A numerical algorithm for solving non-stationary three-dimensional Navier–Stokes equations for modelling of isotropic turbulence decay using hybrid methods was developed. The simulation’s turbulence characteristics show good agreements with analytical solution. The developed numerical algorithm can be used for simulation of turbulence decay with different values of viscosity. Originality/value: An efficient algorithm for simulation of turbulence processes depending on the properties of the viscosity was developed. © 2018, Emerald Publishing Limited.

@article{article,

author = {Abdibekova, Aigerim and Zhakebayev, Dauren and Abdigaliyeva, Akmaral and Zhubat, Kuanysh},

year = {2018},

month = {08},

pages = {},

title = {Modelling of turbulence energy decay based on hybrid methods},

volume = {35},

journal = {Engineering Computations},

doi = {10.1108/EC-11-2016-0395}

}

35

Mathematical modeling of electron irradiation of oil

DOI: 10.1108/EC-12-2016-0419                                      

(SJR 0.313; Q3; Procentile 63 (General Engineering), 52 (Computational Theory and Mathematics), 47 (Computer Science Applications). 35 (Software))

 

Purpose: This paper aims to propose a mathematical model and numerical modeling to study the behavior of low conductive incompressible multicomponent hydrocarbon mixture in a channel under the influence of electron irradiation. In addition, it also aims to present additional mechanisms to study the radiation transfer and the separation of the mixture’s components. Design/methodology/approach: The three-dimensional non-stationary Navier–Stokes equation is the basis for this model. The Adams–Bashforth scheme is used to solve the convective terms of the equation of motion using a fourth-order accuracy five-point elimination method, and the viscous terms are computed with the Crank–Nicolson method. The Poisson equation is solved with the matrix sweep method and the concentration and electron irradiation equations are solved with the Crank–Nicolson method too. Findings: It shows high computational efficiency and good estimation quality. On the basis of numerical results of mathematical model, the effect of the separation of mixture to fractions with various physical characteristics was obtained. The obtained results contribute to the improvement of technologies for obtaining high-quality oil products through oil separation into light and heavy fractions. Mathematical model is approbated based on test problem, and has good agreement with the experimental data. Originality/value: The constructed mathematical model makes developing a methodology for conducting experimental studies of this phenomenon possible. © 2018, Emerald Publishing Limited.

@article{article,

author = {Kizbayev, Assylzhan and Zhakebayev, Dauren and Abdibekov, Ualikhan and Khikmetov, Askar},

year = {2018},

month = {08},

pages = {},

title = {Mathematical modeling of electron irradiation of oil},

volume = {35},

journal = {Engineering Computations},

doi = {10.1108/EC-12-2016-0419}

}

36

Hyperbolic-elliptic model for surface wave in a pre-stressed incompressible elastic half-space

DOI: 10.1016/j.mechrescom.2018.07.006

(SJR 0.681; Q3; Procentile 76 (Civil and Structural Engineering), 76 (Mechanical Engineering), 72 (Mechanics of Materials), 69 (Condensed Matter Physics), 66 (General Materials Science))

The paper aims at derivation of the asymptotic model for surface wave propagating in a pre-stressed incompressible elastic half-space, subject to prescribed surface loading. The approach relies on the slow-time perturbation procedure, extending the previously known hyperbolic-elliptic formulations for surface waves in compressible linearly elastic solids. Within the derived model, the decay away from the surface is governed by a pseudo-static elliptic equation, whereas wave propagation is described by a hyperbolic equation on the surface. The effect of pre-stress, namely, the principal Cauchy stress σ2, is investigated. Finally, an illustrative example of the Lamb problem is considered, demonstrating the efficiency of the approach. 

@article{article,

author = {Khajiyeva, Lelya and Prikazchikov, D. and Prikazchikova, Ludmila},

year = {2018},

month = {07},

pages = {},

title = {Hyperbolic-elliptic model for surface wave in a pre-stressed incompressible elastic half-space},

volume = {92},

journal = {Mechanics Research Communications},

doi = {10.1016/j.mechrescom.2018.07.006}

}

37

The effect of gas and fluid flows on nonlinear lateral vibrations of rotating drill strings

DOI: 10.1016/j.cnsns.2017.12.008

(SJR 1.159; Q1; Procentile 97 (Applied Mathematics), 96 (Numerical Analysis),           94 (Modeling and Simulation)) 

 

In this work we develop nonlinear mathematical models describing coupled lateral vibrations of a rotating drill string under the effect of external supersonic gas and internal fluid flows. An axial compressive load and a torque also affect the drill string. The mathematical models are derived by the use of Novozhilov's nonlinear theory of elasticity with implementation of Hamilton's variation principle. expressions for the gas flow pressure are determined according to the piston theory. The fluid flow is considered as added mass inside the curved tube of the drill string. Using an algorithm developed in the Mathematica computation program on the basis of the Galerkin approach and the stiffness switching method the numerical solution of the obtained approximate differential equations is found. Influences of the external loads, drill string angular speed of rotation, parameters of the gas and fluid flows on the drill string vibrations are shown. 

@article{article,

author = {Khajiyeva, Lelya and Kudaibergenov, Askar and Kudaibergenov, Askat},

year = {2017},

month = {12},

pages = {},

title = {The effect of gas and fluid flows on nonlinear lateral vibrations of rotating drill strings},

volume = {59},

journal = {Communications in Nonlinear Science and Numerical Simulation},

doi = {10.1016/j.cnsns.2017.12.008}

}

38

Detailed Comparative Analysis of Interaction of a Supersonic Flow with a Transverse Gas Jet at High Pressure Ratios

DOI: 10.1134/S1063784219100049

(SJR 0.297; Q4; Procentile

23 (Physics and Astronomy (miscellaneous))

 

Abstract: The interaction of a 3D supersonic turbulent gas flow with a transverse sonic jet injected from the wall has been studied in detail both numerically and experimentally. However, the main drawback of such studies is the lack of detailed description of formation and propagation of vortex structures for moderate and large parameters n (ratio of pressure in the jet to pressure in the flow). Analysis performed in this study is aimed at revelation and detailed explanation of mechanisms of formation of vortices behind the injected sonic jet in a supersonic oncoming flow depending on n for improving the effectiveness of mixing of the jet with the flow. As initial equations, we have used 3D Favre-averaged Navier–Stokes equations closed by the k–ω model of turbulence; these equations are solved using the algorithm based on the essentially nonoscillatory scheme of the third approximation order. We have demonstrated the presence of the following vortex structures known from a number of theoretical publications: two oppositely rotating vortices in front of the jet, a horseshoe vortex; and two pairs formed in the mixing zone between the jet and the flow (one in the wake behind the jet and the other on the lateral line of the jet). We have determined the pressure ratios for which extra pairs of vortices appear (one pair emerges at the Mach disk edge as a result of interaction of a retarded flow of the jet behind the Mach disk with a high-velocity ascending flow behind the barrel and the other pair is formed due to the interaction of the ascending jet flow with the incoming main gas flow). As a result of comparative analysis, the pressure ratios for which a clear pattern of additional horn vortices is observed near the wall in the region behind the jet, have been determined. The dependence of the slope of the bow shock on the pressure ratio has been plotted. It is found that the pressure distribution at the wall in front of the jet in the symmetry plane is in satisfactory agreement with experimental data. © 2019, Pleiades Publishing, Ltd.

@article{article,

author = {Beketaeva, A. and Bruel, Pascal and Naimanova, A.},

year = {2019},

month = {10},

pages = {1430-1440},

title = {Detailed Comparative Analysis of Interaction of a Supersonic Flow with a Transverse Gas Jet at High Pressure Ratios},

volume = {64},

journal = {Technical Physics},

doi = {10.1134/S1063784219100049}

}

39

Numerical study of the interaction of vortex ring and background turbulence

DOI: 10.1134/S0869864319060040

(SJR 0.473; Q3; Procentile 43 (Aerospace Engineering) 39 (Energy Engineering and Power Technology) 35 (Modeling and Simulation) 

 

The article presents the results of direct numerical simulation of a turbulent vortex ring with a moderate Reynolds number, interacting with the field of external turbulent fluctuations. The ring is formed by buoyancy forces from a spherically-shaped volume of elevated temperature. We consider the interaction of the ring with the field of turbulent fluctuations (of temperature and velocity) located in the form of a horizontal layer in front of the ring. The effect of separation of vortices by the sign of vorticity in a layer of fluctuations (with respect to the rotation of the ring) during the passage of the ring through this field has been found. This effect first causes the ring to slow down when the fluctuations pass outside the ring, and then to accelerate with decreasing radius when the fluctuations pass through its center. Due to buoyancy effects in the fluctuations layer, the separation of hot and cold air occurs. During the interaction with the ring, this leads to the accumulation of the reduced temperature in the core of the ring, while the increased temperature is accumulated near the axis. This temperature distribution results in a baroclinic vorticity generation leading to the reduction of the ring radius. © 2019, M.Yu. Hrebtov, M.S. Bobrov, D.B. Zhakebaev, and K.K. Karzhaubaev.

@article{article,

author = {Hrebtov, Michael and Bobrov, M. and Zhakebaev, D. and Karzhaubaev, K.},

year = {2019},

month = {11},

pages = {821-836},

title = {Numerical study of the interaction of vortex ring and background turbulence},

volume = {26},

journal = {Thermophysics and Aeromechanics},

doi = {10.1134/S0869864319060040}

}

40

Numerical mass transfer studies in case of convective flows occurrence in isothermal ternary gas mixtures

DOI: 10.1615/ComputThermalScien.2018024724

(SJR 0.245; Q3; Procentile 35 (Energy Engineering and Power Technology), 34 (Computational Mathematics), 31 (Fluid Flow and Transfer Processes), 21 (Surfaces and Interfaces)) 

 

Isothermal diffusion mixing in multicomponent gas mixtures at various pressures is studied numerically in He + Ar – N2 and CH4 + Ar – N2 . It is shown that in systems where the diffusion coefficients differ significantly from each other, nonlinear distributions of the concentrations of the components arise with increasing pressure, which leads to a nonmonotonous density distribution of the gas mixture in the computational domain. The resulting nonlinearity is the cause of the formation of convective structured flows. The transition from the diffusion to the convective regime is characterized by a significant increase in the average mixing rate. The dynamics of the development of convective currents and their structure is investigated. © 2019 by Begell House, Inc.

@article{article,

author = {Kossov, Vladimir and Fedorenko, Olga and Zhakebayev, Dauren},

year = {2018},

month = {01},

pages = {},

title = {NUMERICAL MASS TRANSFER STUDIES IN CASE OF CONVECTIVE FLOWS OCCURRENCE IN ISOTHERMAL TERNARY GAS MIXTURES},

volume = {11},

journal = {Computational Thermal Sciences: An International Journal},

doi = {10.1615/ComputThermalScien.2018024724}

}

41

Peculiarities of the rise of structured formations at the boundary of the change of the regimes “diffusion-concentration convection” at an isothermal mixing of a binary mixture equally diluted by the third component

DOI: 10.1134/S0869864319010049

(SJR 0.245; Q3; Procentile 43 (Aerospace Engineering) 39 (Energy Engineering and Power Technology) 35 (Modeling and Simulation)) 

The peculiarities of the change of the regimes “diffusion-gravitational concentration convection” have been studied numerically. It is shown that at a certain mixture composition and pressure, substantially nonlinear distributions of the concentrations of components arise at the expense of the difference in the diffusion coefficients of components, which lead to the corresponding distribution of the gaseous mixture density. This is a reason for the formation of structured formations and the rise of convective instability in the mixtures under study. The time of the rise of convective flows and of the mean velocity of the components transfer has been estimated. Obtained results are compared with experimental data. © 2019, V.N. Kossov, O.V. Fedorenko, D.B. Zhakebaev, and A.P. Kizbaev.

@article{article,

author = {Kossov, V. and Fedorenko, O. and Zhakebaev, D. and Kizbaev, A.},

year = {2019},

month = {01},

pages = {27-35},

title = {Peculiarities of the rise of structured formations at the boundary of the change of the regimes “diffusion-concentration convection” at an isothermal mixing of a binary mixture equally diluted by the third component},

volume = {26},

journal = {Thermophysics and Aeromechanics},

doi = {10.1134/S0869864319010049}

}

42

Features of Multicomponent Mass Transfer in Gas Mixtures Containing Hydrocarbon Components

DOI: 10.1002/ceat.201800604

(SJR 0.403; Q3; Procentile 61 (Industrial and Manufacturing Engineering)   55 (General Chemical Engineering)   53 (General Chemistry)) 

The features characterizing the transition from a diffusion process to the concentration gravitational convection in multicomponent gas mixtures containing hydrocarbon components are analyzed. It is demonstrated that this transition is possible due to the difference in interdiffusion coefficients of components, initial concentration of components, and the pressure of the experiment. A mathematical model for describing the transition from the diffusion process to the concentration gravitational convection in multicomponent gas mixtures is considered. The key feature indicating the transfer from the diffusion regime to the convective one is the curvature of an isoline of the heavy component of the gas mixture. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

 

@article{article,

author = {Kossov, Vladimir and Fedorenko, Olga and Zhakebayev, Dauren},

year = {2019},

month = {02},

pages = {},

title = {Features of multicomponent mass transfer at the boundary of change in the “diffusion ‐ concentration gravitational convection” regime in gas mixtures containing hydrocarbon components},

volume = {42},

journal = {Chemical Engineering & Technology},

doi = {10.1002/ceat.201800604}

}

43

Mixed Lagrangian-Eulerian Simulation of Interaction between a Shockwave and a Cloud of Water Droplets

DOI: 10.1134/S1810232820020071

(SJR 0.457; Q3; Procentile 50 (Energy Engineering and Power Technology),

49 (Modeling and Simulation),

48 (Environmental Engineering),      

41 (Condensed Matter Physics))  

 

Abstract: We present a numerical model suitable for simulation of shock orblast waves passing through a cloud of water droplets. The model takesinto account the droplet breakup, radiation, and evaporation effects.The gas phase (a mixture of air and water vapor) is solved within anEulerian framework with a set of compressible transport equations. Thedisperse phase (water droplets) is represented by a number of Lagrangianparcels of a specified size and mass distribution. The model has beenverified with experimental data. The results show that for large(millimeter-sized) droplets with high Weber numbers, the breakup modelis the most important part for accurate representation of thewave-droplet interaction phenomena, while for very fine droplets(1 μmor less), the evaporation effects are the strongest in the shockwavemitigation process. The radiative heat flux increase due to high dropletemissivity is found to be possible for an intermediate size waterdroplets (about 10–20 μm)in the case of continuous heat release. © 2020, Pleiades Publishing, Ltd.

 

@article{article,

author = {Hrebtov, Michael and Bobrov, M. and Zhakebayev, Dauren and Karzhaubayev, K.},

year = {2020},

month = {04},

pages = {254-263},

title = {Mixed Lagrangian-Eulerian Simulation of Interaction between a Shockwave and a Cloud of Water Droplets},

volume = {29},

journal = {Journal of Engineering Thermophysics},

doi = {10.1134/S1810232820020071}

}

44

Laminar to turbulent flow transition inside the boundary layer adjacent to isothermal wall of natural convection flow in a cubical cavity

DOI: 10.1016/j.ijheatmasstransfer.2020.120822

(SJR 1.713; Q1; Procentile 98 (Fluid Flow and Transfer Processes)    

95(Mechanical Engineering)  

94(Condensed Matter Physics)) 

 

 

We investigate three-dimensional natural convection flow in an air-filled, differentially heated cubical cavity. The vertical wall on the left is heated and the vertical wall on the right is cooled, with the remaining four walls being adiabatic. We performed direct numerical simulations of the natural convection flow using discrete unified gas-kinetic scheme (DUGKS), with an improved implementation of boundary conditions. Thin boundary layers are developed along the two isothermal walls. The laminar to turbulent flow transition inside the boundary layers is studied in this paper. The simulations are conducted at three Rayleigh numbers of 1.5×109, 1.0×1010, 1.0×1011 using nonuniform grids with resolution up to 3203. The Prandtl number is fixed at 0.71. We provide a detailed analysis of the transition from laminar to turbulent flow inside the vertical boundary layers and its influence on the rate of heat transfer. Time traces of temperature and velocity, time-averaged flow field, statistics of fluctuation fields are presented to illustrate distinct behaviors in the laminar and turbulent thermal boundary layer, as well as to determine the transition location at different Ra numbers. The average Nusselt numbers for different Ra numbers are compiled and compared to previous results. A guideline of the resolution requirement is suggested based on the Ra scaling of laminar thermal boundary layer. © 2020 Elsevier Ltd

@article{article,

author = {Wen, Xin and Wang, Lian-Ping and Guo, Zhaoli and Zhakebayev, Dauren},

year = {2021},

month = {03},

pages = {120822},

title = {Laminar to turbulent flow transition inside the boundary layer adjacent to isothermal wall of natural convection flow in a cubical cavity},

volume = {167},

journal = {International Journal of Heat and Mass Transfer},

doi = {10.1016/j.ijheatmasstransfer.2020.120822}

}

45

The Verhulst-like equations: Integrable OΔE and ODE with chaotic behavior

DOI: 10.3390/sym11121446

(SJR 0.385; Q2; Procentile 90 (General Mathematics)

77 (Computer Science miscellaneous)

66 (Physics and Astronomy (miscellaneous))                   56 (Chemistry (miscellaneous)) 

In this paper, we study various variants of Verhulst-like ordinary differential equations (ODE) and ordinary difference equations (OΔE). Usually Verhulst ODE serves as an example of a deterministic system and discrete logistic equation is a classic example of a simple system with very complicated (chaotic) behavior. In our paper we present examples of deterministic discretization and chaotic continualization. Continualization procedure is based on Pade approximants. To correctly characterize the dynamics of obtained ODE we measured such characteristic parameters of chaotic dynamical systems as the Lyapunov exponents and the Lyapunov dimensions. Discretization and continualization lead to a change in the symmetry of the mathematical model (i.e., group properties of the original ODE and OΔE). This aspect of the problem is the aim of further research. © 2019 by the authors.

@article{article,

author = {Andrianov, Igor and Starushenko, Galina and Kvitka, Sergiy and Khajiyeva, Lelya},

year = {2019},

month = {11},

pages = {1446},

title = {The Verhulst-Like Equations: Integrable OΔE and ODE with Chaotic Behavior},

volume = {11},

journal = {Symmetry},

doi = {10.3390/sym11121446}

}

46

On the dynamics of drilling

DOI: 10.1016/j.ijengsci.2019.103184

(SJR 2.731; Q1; Procentile  

99 (General Engineering)  

97 (Mechanical Engineering)    

96 (Mechanics of Materials)

92 (General Materials Science)

 

A multi-parameter approach for analysing drilling dynamics is developed. It is oriented to better understanding peculiarities of the process and optimising existing formulations. The procedure is specified for bending vibrations of a rotating elastic beam pre-stressed simultaneously by an axial compressive force and torque. The appropriately normalized ratio of the bending stiffness to the axial force magnitude is assumed to be small. Two other independent dimensionless parameters correspond to the vibration frequency and the relation between force and torque magnitudes. A classification, similar to that in thin shell theory, is established for free bending vibrations. The associated shortened equations are derived. The asymptotic results are validated by comparison with the dispersion curves calculated from the original full equation of motion. An example of a boundary-value problem for a drill string of a finite length is also presented. © 2019

@article{article,

author = {Kaplunov, J. and Khajiyeva, Lelya and Martyniuk, M. and Sergaliyev, A.S.},

year = {2020},

month = {01},

pages = {103184},

title = {On the dynamics of drilling},

volume = {146},

journal = {International Journal of Engineering Science},

doi = {10.1016/j.ijengsci.2019.103184}

}

47

Development of an information system for storing digitized works of the Almaty Academgorodok research institutes

DOI: 10.47086/pims.613534

(SJR 0.190; Q3;   Procentile 43 (General Engineering)) 

 

The present article describes the architecture of the integrated distributed information system created for storing digitized works of employees of Almaty Akademgorodok research institutes (Kazakhstan) and providing access to them using Web technology. Comparative analysis of two data storage systems for storing digitized works, Ceph and GlusterFS, is provided. The description of the software part of the information system is provided which consists of four subsystems: repository of digital objects, subsystem for managing current research information, subsystem of integration of distributed information resources, subsystem of access to distributed information resources based on Web technologies. The relation between the subsystems and their integration is described. The work defines the requirements to the repository of digital objects. The requirements for the repository of digital objects are defined; a comparative analysis of open source software used for these purposes is made. © 2019 Author(s).

@article{article,

author = {TEMİRBEKOV, Nurlan and Baigereyev, Dossan and TEMİRBEKOV, Almas and OMİRZHANOVA, Bakytzhan},

year = {2021},

month = {07},

pages = {},

title = {Development of an Information System for Storing Digitized Works of the Almaty Academgorodok Research Institutes},

journal = {Proceedings of International Mathematical Sciences},

doi = {10.47086/pims.613534}

}

48

[Architecture of the distributed information system of the Almaty Academgorodok]

[Architektura rozproszonego systemu informacyjnego w Kampusie Almaty]

DOI: 10.15199/48.2019.05.19

(SJR 0.190; Q3; Procentile 22 (Electrical and Electronic Engineering)) 

The paper describes the architecture of an integrated distributed information system, which allows to preserve the result of the intellectual activity of Kazakhstan Engineering Technological University and a number of research institutes, located in the Academgorodok of Almaty, Kazakhstan. A description of the implementation of information system subsystems is presented. © 2019, Wydawnictwo SIGMA-NOT. All rights reserved.

@article{article,

author = {TEMIRBEKOV, Nurlan and Baigereyev, Dossan},

year = {2019},

month = {05},

pages = {77-80},

title = {Architecture of the distributed information system of the Almaty Academgorodok},

volume = {1},

journal = {PRZEGLĄD ELEKTROTECHNICZNY},

doi = {10.15199/48.2019.05.19}

}

49

Development of a Distributed Information System of the Almaty Academgorodok

DOI:10.15199/48.2019.05.19

(SJR 0.190; Q3; Procentile 43 (General Engineering)

 

 

The present article describes the architecture of an integrated distributed information system used to store and manage digitized works of employees of research institutes of the Almaty Academgorodok. The Ceph open source software object storage network is used as data storage. Testing of the POSIX-compatible CephFS file system abstraction is performed. The software part of the information system consists of four subsystems: repository of digital objects, subsystem for managing current research information, subsystem of integration of distributed information resources, subsystem of access to distributed information resources based on web technologies. The description of the software part of the information system is provided. Integration between the subsystems of the information system is performed. © 2020 School of Science, IHU. All Rights Reserved.

@article{article,

author = {TEMIRBEKOV, Nurlan and Baigereyev, Dossan},

year = {2019},

month = {05},

pages = {77-80},

title = {Architecture of the distributed information system of the Almaty Academgorodok},

volume = {1},

journal = {PRZEGLĄD ELEKTROTECHNICZNY},

doi = {10.15199/48.2019.05.19}

}

50

Parallel CUDA implementation of a numerical algorithm for solving the Navier-Stokes equations using the pressure uniqueness condition

DOI: 10.1063/5.0041039

(SJR 0.177; Q4; Procentile 17 (General Physics and Astronomy)) 

In this paper, we study numerical methods for solving the Navier-Stokes equations in doubly connected domains. Two methods for solving the problem are considered. The first method is based on constructing a difference problem in variables of the stream function and the vortex of velocity using the uniqueness condition for pressure. The numerical solution of the elliptic equation for stream functions is found as the sum of the solutions of two simple problems of an elliptic type. One problem is with homogeneous boundary conditions, and the other is with a homogeneous equation. An alternative approach to solving the problem is the fictitious domain method with the continuation of the least coefficient. This method does not require satisfying the pressure uniqueness condition, and is simple to implement. An important direction in the development of numerical simulation methods is the study of approximate methods for solving problems of mathematical physics in complex multidimensional areas. To solve many applied problems in irregular areas, the fictitious domain method is widely used, which is characterized by a high degree of automation of programming. The main idea of the fictitious domain method is that the problem is solved not in the original complex domain, but in some other, simpler domain. This allows to create software immediately for a fairly wide class of problems with arbitrary computational domains. The possibilities of applying the fictitious domain method to the problems of hydrodynamics in the variables "stream function, vortex of velocity"are considered in many works. In this paper, we study a numerical method for solving the Navier-Stokes equations in doubly connected domains. A computational finite difference algorithm for solving an auxiliary problem of the fictitious domain method has been developed. The results of numerical modeling of the two-dimensional Navier-Stokes equations by the fictitious domain method with continuation by the lowest coefficient are presented. For this problem, a parallel algorithm was developed using the CUDA architecture, which was tested on various grid dimensions. © 2021 Author(s).

@inproceedings{inproceedings,

author = {Temirbekov, Almas and Baigereyev, Dossan and Temirbekov, Nurlan and Urmashev, Baidaulet and Amantayeva, Aidana},

year = {2021},

month = {02},

pages = {020063},

title = {Parallel CUDA implementation of a numerical algorithm for solving the Navier-Stokes equations using the pressure uniqueness condition},

volume = {2325},

journal = {AIP Conference Proceedings},

doi = {10.1063/5.0041039}

}

51

Information systems of integrated machine learning modules on the example of a verbal robot

DOI: 10.32014/2019.2518-170X.173

(SJR 0.323; Q3; Procentile 40 (Geology)

37 (Geotechnical Engineering and Engineering Geology) 

In this work, information systems of integrated machine learning modules have been performed using the verbal robot as an example. Hardware components have been developed, logical components that have been assembled and /or developed to implement an automated verbal robot system, module tracking has been also performed that can track human faces in real time through the OpenCV library and automated services on Jetson TX1 SoC for maneuvering a mobile robot chassis. © 2019, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved.

@article{article,

author = {Kalimoldayev, Maksat and Akhmetzhanov, Maxat and Kunelbayev, Murat},

year = {2019},

month = {12},

pages = {215-222},

title = {INFORMATION SYSTEMS OF INTEGRATED MACHINE LEARNING MODULES ON THE EXAMPLE OF A VERBAL ROBOT},

volume = {6},

journal = {NEWS of National Academy of Sciences of the Republic of Kazakhstan},

doi = {10.32014/2019.2518-170X.173}

}

52

Implementation of covering algorithm for the robot with parallel structure

DOI: 10.32014/2019.2518-170X.142

(SJR 0.323; Q3; Procentile 40 (Geology)

37 (Geotechnical Engineering and Engineering Geology) 

The paper considers a 3RPR robot with a parallel structure. One of the main tasks in robotics is to determine the working area of the robot. Algorithms for solving systems of this type are given. The properties and accuracy estimates of the obtained approximations are proved. As an approach to determining the work area, the method of non-uniform coatings was used in this work, which allows one to determine the external and internal approximation of the set of solutions of the system with a given accuracy. © 2019, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved.

@article{article,

author = {Kalimoldayev, M. and Akhmetzhanov, M. and Mukanova, Balgaisha and Azimova, Dinara},

year = {2019},

month = {10},

pages = {197-201},

title = {IMPLEMENTATION OF COVERING ALGORITHM FOR THE ROBOT WITH PARALLEL STRUCTURE},

volume = {5},

journal = {NEWS of National Academy of Sciences of the Republic of Kazakhstan},

doi = {10.32014/2019.2518-170X.142}

}

53

Near-Resonant Regimes of a Moving Load on a Pre-Stressed Incompressible Elastic Half-Space

DOI: 10.2478/ama-2021-0005

(SJR 0.314; Q3; Procentile 45 (Mechanical Engineering)

41 (Control and Systems Engineering) 

The article is concerned with the analysis of the problem for a concentrated line load moving at a constant speed along the surface of a pre-stressed, incompressible, isotropic elastic half-space, within the framework of the plane-strain assumption. The focus is on the near-critical regimes, when the speed of the load is close to that of the surface wave. Both steady-state and transient regimes are considered. Implementation of the hyperbolic-elliptic asymptotic formulation for the surface wave field allows explicit approximate solution for displacement components expressed in terms of the elementary functions, highlighting the resonant nature of the surface wave. Numerical illustrations of the solutions are presented for several material models.

@article{article,

author = {Kudaibergenov, Askar and Kudaibergenov, Askat and Prikazchikov, D.},

year = {2021},

month = {03},

pages = {30-36},

title = {Near-Resonant Regimes of a Moving Load on a Pre-Stressed Incompressible Elastic Half-Space},

volume = {15},

journal = {Acta Mechanica et Automatica},

doi = {10.2478/ama-2021-0005}

}

54

Differential evolution algorithm of solving an inverse problem for the spatial Solow mathematical model

DOI: 10.1515/jiip-2020-0108

(SJR 0.498; Q3; Procentile 54 (Applied Mathematics)) 

The differential evolution algorithm is applied to solve the optimization problem to reconstruct the production function (inverse problem) for the spatial Solow mathematical model using additional measurements of the gross domestic product for the fixed points. Since the inverse problem is ill-posed the regularized differential evolution is applied. For getting the optimized solution of the inverse problem the differential evolution algorithm is paralleled to 32 kernels. Numerical results for different technological levels and errors in measured data are presented and discussed. © 2020 Walter de Gruyter GmbH, Berlin/Boston 2020.

@article{article,

author = {Kabanikhin, S. and Krivorotko, Olga and Bektemessov, Zh and Bektemesov, Maktagali and Zhang, Shuhua},

year = {2020},

month = {11},

pages = {761-774},

title = {Differential evolution algorithm of solving an inverse problem for the spatial Solow mathematical model},

volume = {28},

journal = {Journal of Inverse and Ill-posed Problems},

doi = {10.1515/jiip-2020-0108}

}

55

Numerical Solution of the Inverse Pharmacokinetic Problem for the Three- Compartment Model

DOI:10.51301/vest.su.2020.v138.i2.136

(SJR 0.19; Q3;   Procentile 43 (Engineering:
General Engineering))

 

 

 

This article considers the numerical solution of the inverse pharmacokinetics problem for a three-compartment linear model. First, the article presents some reviews of the pharmacokinetics problem and the three-compartment model. The following describes the formulation of the pharmacokinetics problem for a three-compartment linear model. The direct problem is the Cauchy problem for systems of ordinary differential equations. Solving the direct problem analytically, we find the concentration for the first compartment, since it is the object of the study. The formulation of the inverse problem is reduced to a nonlinear operator equation. For the inverse problem, seven coefficients concentration for the first compartment should be found for some additional information of a given concentration. The inverse problem is reduced to minimizing the objective functional. For the numerical solution, an adaptive search method is used genetic algorithm. The numerical results of this problem are given. © 2020. School of Science, IHU. All rights reserved.

@article{article,

author = {Urmashev, B.A. and Kasenov, S.Y. and Tursynbay, А.Т and Temirbekov, A.N. and Amantayeva, A.B. and Sagimbayeva, L.A.},

year = {2020},

month = {01},

pages = {772-779},

title = {Solutions of the inverse problem of pharmacokinetics for the three-compartment model},

volume = {138},

journal = {Vestnik KazNRTU},

doi = {10.51301/vest.su.2020.v138.i2.136}

}

56

Numerical algorithm for solving the inverse problem for the helmholtz equation

DOI: 10.1007/978-3-030-12203-4_20

(SJR 0.16; Q3;   Procentile 30 (Mathematics:
General Mathematics),

18 (Computer Science:
General Computer Science)

 

 

In this paper we consider acoustic equation. The equation by separation of variables is reduced to a boundary value problem for the Helmholtz equation. We consider problem for the Helmholtz equation. We reduce the solution of the operator equation to the problem of minimizing the functional. And we build numerical algorithm for solving the inverse problem. At the end of the article is given the numerical calculations of this problem. © Springer Nature Switzerland AG 2019.

@inbook{inbook,

author = {Shishlenin, Maxim and Kasenov, S. and Askerbekova, Zh},

year = {2019},

month = {01},

pages = {197-207},

title = {Numerical Algorithm for Solving the Inverse Problem for the Helmholtz Equation: Methods and Protocols},

isbn = {978-1-4939-9085-6},

doi = {10.1007/978-3-030-12203-4_20}

}

57

Numerical Solution of the Inverse Pharmacokinetic Problem for the Three- Compartment Model

DOI: 10.51301/vest.su.2020.v138.i2.136

(SJR 0.19; Q4; Procentile

43 (Engineering:
General Engineering)

 

 

This article considers the numerical solution of the inverse pharmacokinetics problem for a three-compartment linear model. First, the article presents some reviews of the pharmacokinetics problem and the three-compartment model. The following describes the formulation of the pharmacokinetics problem for a three-compartment linear model. The direct problem is the Cauchy problem for systems of ordinary differential equations. Solving the direct problem analytically, we find the concentration for the first compartment, since it is the object of the study. The formulation of the inverse problem is reduced to a nonlinear operator equation. For the inverse problem, seven coefficients concentration for the first compartment should be found for some additional information of a given concentration. The inverse problem is reduced to minimizing the objective functional. For the numerical solution, an adaptive search method is used genetic algorithm. The numerical results of this problem are given. © 2020 School of Science, IHU. All Rights Reserved.

@article{article,

author = {Urmashev, B.A. and Kasenov, S.Y. and Tursynbay, А.Т and Temirbekov, A.N. and Amantayeva, A.B. and Sagimbayeva, L.A.},

year = {2020},

month = {01},

pages = {772-779},

title = {Solutions of the inverse problem of pharmacokinetics for the three-compartment model},

volume = {138},

journal = {Vestnik KazNRTU},

doi = {10.51301/vest.su.2020.v138.i2.136}

}

58

Determination of the main parameters of the photovoltaic solar module

DOI: 10.12720/sgce.9.1.162-169

(SJR 0.203; Q4; Procentile 25 (Energy:

General: Energy),

20 (Environmental Science:

General Environmental Science),

19 (Earth and Planetary Sciences:

General Earth and Planetary Sciences) 

This article deals with the determination of the main operating parameters of a photovoltaic solar module. In laboratory tests, the study of the dependence of current, voltage and power on time and density of solar radiation, as well as monitoring of environmental parameters: temperature and humidity of the outside air. Analysis of the test results shows that a photoelectric module with an installed capacity of 800 W and a total battery capacity of 800 Ah provides the electric power industry with a daily consumption of 2.0.. 2.2 kWh. The discharge time of the battery varies from 11.7 to 3.5 hours when the average electric load of the consumer changes from 300 to 1000 watts. © 2020 The Authors, published by EDP Sciences.

@article{article,

author = {Urmashev, Baydaulet and Kunelbayev, Murat and Temirbekov, Almas and Kassenov, Syrym and Zhaksylykova, Zhadra and Amenova, Farida},

year = {2020},

month = {01},

pages = {162-169},

title = {Determination of the main parameters of the photovoltaic solar module},

journal = {International Journal of Smart Grid and Clean Energy},

doi = {10.12720/sgce.9.1.162-169}

}

 

59.   

Numerical heat transfer simulation of solar-geothermal hybrid source heat pump in Kazakhstan climates        

DOI:

http://bcc.bas.bg/BCC_Volumes/Volume_50_Special_G_2018/50G_PD_7-13.56.pdf 

(SJR 0,18 ; Q4,  Procentile 15 (General Chemistry)).

ABSTRACT :

A numerical energy balance model has been proposed in this work for predicting the thermal performances of solar-geothermal hybrid source heat pumps in winter climates of Kazakhstan. The numerical simulation was performed for the year round continental climate conditions. The energy balance model has been developed based on first law of thermodynamics. The proposed heat pump configuration is working in solar mode during sunshine hours and geothermal model during off sunshine hours. Moreover, the system is operating in solar-geothermal hybrid model to meet the evaporator load during insufficient availability of solar and geothermal sources. The energy performance comparison between conventional geothermal source and solar-ground hybrid source heat pump configurations has been made. The influences of solar intensity, ambient temperature, heat pump operating temperatures are discussed. © 2018 Bulgarian Academy of Sciences. 

 

Saktashova G., Aliuly A., Belyayev Ye., Mohanraj M., Singh R.M. ,Numerical heat transfer simulation of solar-geothermal hybrid source heat pump in Kazakhstan climates. //Bulgarian Chemical Communications. – 2018. – Vol.50. – P.7-13

DOI: http://bcc.bas.bg/BCC_Volumes/Volume_50_Special_G_2018/50G_PD_7-13.56.pdf 

            

 

60.   

Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part A: Modeling and modifications) 

DOI: https://doi.org/10.1016/j.rser.2017.08.022 

(SJR 3,52 ; Q1,  Procentile 97 (Renewable Energy, Sustainability and the Environment)).

This paper presents a comprehensive review on research and developments on solar assisted compression heat pump systems, mostly reported during the last two decades. The first part of this paper provides a detailed description of the past efforts on various system configurations, system modeling, enhancement of system performance, modifications in compression heat pump cycles and environment friendly refrigerant options for solar assisted compression heat pump systems. The economical and environmental impacts of solar assisted compression heat pump systems are also described. Further research needs in this important field of solar assisted compression heat pump are listed. The outcomes of this review confirm that, there is a lot of research scope for improving the performance of the system and reducing its initial cost to make it competitive in the global market. The information presented in this paper is shall be highly beneficial for the active researchers working presently on solar assisted compression heat pumps. 

M.Mohanraj, Ye.Belyayev, S.Jayaraj, A.Kaltayev , Numerical heat transfer simulation of solar-geothermal hybrid source heat pump in Kazakhstan climates. //Renewable and Sustainable Energy Reviews. – 2018. – Vol.83. – P.90-123

DOI: https://doi.org/10.1016/j.rser.2017.08.022 

61.             

Dynamics of orthogonal mechanism of vibrating table in view of friction 

DOI: 10.1007/978-3-319-60702-3_27

(SJR 0,16; Q4,  Procentile 23(Engineering

Mechanical Engineering)      18(Engineering

Mechanics of Materials)).

The article deals with dynamics of orthogonal mechanism of vibrating table in view of friction. The emphasis is placed on the influence of friction on the oscillatory motion of the mechanism at its interaction with non-ideal energy source. As a result of analysis of numerical solutions of nonlinear motion equation has been determined that the coefficient of sliding friction affects the average angular speed of the driving link, and at that its growth in the first half cycle, when the vibrating table moves upward will cause reduction of the average angular speed, but in the second half-cycle, conversely, will cause increase of this value of angular speed. A coefficient of rolling friction influences on the vibration amplitude of the angular speed of the driving link: with its increasing the amplitude of vibrations increases. Therefore, sliding friction may affect the coefficient of non-uniformity of rotation in two ways, i.e. one half cycle of the mechanism rotation can reduce it and increase it in the other half cycle, and only rolling friction destabilizing effect has been found. © Springer International Publishing AG 2018. 

Iskakov Z.,Bissembayev K.,Jamalov N.,

Dynamics of orthogonal mechanism of vibrating table in view of friction. //Mechanisms and Machine Science. – 2018. – Vol.52. – P.261-268

DOI: 10.1007/978-3-319-60702-3_27

62.             

The nonlinear vibrations of orthogonal mechanism of vibrating table in view of friction 

DOI: 10.5194/ms-9-307-2018 

(SJR 0,31; Q2,  Procentile 52(Engineering

Industrial and Manufacturing Engineering)   50(Engineering Mechanical Engineering)       48(Engineering Civil and Structural Engineering)       48(Chemical Engineering Fluid Flow and Transfer Processes) 46(Engineering Mechanics of Materials)       45(Engineering Control and Systems Engineering)). 

In dynamics of the orthogonal mechanism of vibrating table main attention is paid to the effect of friction on vibrational proceß when it is interacting with non-ideal energy source. As a result of analysis of numerical solutions of nonlinear equation of motion, it is established that in general, for the period of rotation, both sliding friction and rotational friction increase the difference between the maximum and minimum angular velocity values of the driving link (engine shaft) when its average value is constant; both increase the coefficient of non-uniformity of rotation. When there is a cargo of significant maß in the working link, the effect of sliding friction impacts more on the amplitude and frequency of the angular velocity oscillations of the driving link (engine shaft) and on the frequency of the coordinate changes, as well as on the frequencies and maximum and minimum values of the projections of the velocity and acceleration of the hinge linking the work platform to coupler. Similarly, the larger of the load maß, the stronger the effect of rotational friction on the amplitude and frequency of angular velocity oscillations of the driving link (engine shaft). © Author(s) 2018. 

Iskakov Z.,Bissembayev K.,Jamalov N.,

The nonlinear vibrations of orthogonal mechanism of vibrating table in view of friction. //Mechanical Sciences. – 2018. – Vol.9. – P.307-325

DOI: 10.5194/ms-9-307-2018 

63.             

Analysis of manipulator grains for overloading large-sized goods in the sewing industry 

DOI: https://ttp.ivgpu.com/

(SJR 0,2 ; Q3,  Procentile 17(Materials Science

Polymers and Plastics)      17(Business, Management and Accounting

General Business, Management and Accounting)      16(Engineering

Industrial and Manufacturing Engineering) ). 

The paper examines the gripper scheme of the manipulator for reloading bulky goods in the garment industry. Grips with a circuit of rods and with cable drives are studied. The results of static calculations for the gripper with pneumatic drive and calculations for strength and rigidity for the three-phalanx adaptive gripper are given. In the garment industry for the reloading of large-sized cargoes, the use of robot manipulators is complicated by the lack of reliable grippers. To fill this problem, two grasping schemes are proposed in this paper. Some calculations of these two grasp-ing schemes developed by the authors are given. The drive of the first gripper is pneumatic, and the second one is based on flexible traction elements. © 2018 Ivanovo State University of Chemistry and Technology. All rights reserved. 

Usenbekov Z.H.,Temirbekov E.S.,Kaimov S.T.,Karasaev B.A.,Kandidat M., Analysis of manipulator grains for overloading large-sized goods in the sewing industry. //Izvestiya Vysshikh Uchebnykh Zavedenii, Seriya Teknologiya Tekstil'noi Promyshlennosti. – 2018. – Vol.378. – P.332-336

DOI:

https://ttp.ivgpu.com/

64.             

Numerical heat transfer simulation of solar-geothermal hybrid source heat pump in Kazakhstan climates 

DOI: http://www.bcc.bas.bg/BCC_Volumes/Volume_50_Special_G_2018/50G_PD_7-13.56.pdf  

(SJR 0,18; Q4,  Procentile 15 (General Chemistry)). 

A numerical energy balance model has been proposed in this work for predicting the thermal performances of solar-geothermal hybrid source heat pumps in winter climates of Kazakhstan. The numerical simulation was performed for the year round continental climate conditions. The energy balance model has been developed based on first law of thermodynamics. The proposed heat pump configuration is working in solar mode during sunshine hours and geothermal model during off sunshine hours. Moreover, the system is operating in solar-geothermal hybrid model to meet the evaporator load during insufficient availability of solar and geothermal sources. The energy performance comparison between conventional geothermal source and solar-ground hybrid source heat pump configurations has been made. The influences of solar intensity, ambient temperature, heat pump operating temperatures are discussed. © 2018 Bulgarian Academy of Sciences. 

Saktashova G.,Aliuly A.,Belyayev Ye.,Mohanraj M.,Singh R.M., Numerical heat transfer simulation of solar-geothermal hybrid source heat pump in Kazakhstan climates. //Bulgarian Chemical Communications. – 2018. – Vol.50. – P.7-13

DOI: http://www.bcc.bas.bg/BCC_Volumes/Volume_50_Special_G_2018/50G_PD_7-13.56.pdf  

65.             

Identification of productive horizons of hydrocarbon deposits along spatial models of the structure and geomechanical state of the upper part of the earth's crust 

DOI: 0.5593/sgem2018/1.4/S06.062 

(SJR 0,22; Q,  Procentile 17(Earth and Planetary Sciences Geotechnical Engineering and Engineering Geology)        15(Earth and Planetary Sciences Geology) ). 

Modern ideas about the formation of hydrocarbon deposits are based on the results of experimental and theoretical studies of the lithosphere dynamics. They are based on the established facts of the "instability of fluid systems in the sedimentary cover and foundation, as well as the migration of fluids through the permeable zones resulting from the varying stresses in the earth's crust". It follows that the geological environment is non equilibrium. Forces of external influence and thermodynamic conditions inside the crust promote the extrusion of fluids from the lower horizons to the upper horizons and ensure their movement through the zones of decompaction to the places of discharge, which are often the near-fault zones limited by fluid. The developed technology makes it possible to identify horizons in the context of the geological environment with which hydrocarbon accumulations can be associated, visualize their position in space and, thus, create a basis for the design of the location of wells and solve several problems: a) Obtain a clear spatial representation of the properties of the geological environment. In particular, the provisions of reservoirs supplying hydrocarbon migration channels, detection of new zones of increased permeability; b) According to the distribution of the parameters of the stress-strain state, it is possible to obtain a spatial representation of the direction of migration of the fluid flows; c) The notion of the morphology of productive horizons provides a basis for designing wells and allows conclusions about the possible location of new deposits; d) The proposed methodology can be used as one of the stages of prospecting and exploration of hydrocarbon deposits on the projected areas in order to identify productive horizons in the crustal section and to assess the possible direction of fluid flows in the block under study;. © SGEM2018. 

Zhantayev Z.,Iskakov B.,Fremd A., Bibossinov A., Identification of productive horizons of hydrocarbon deposits along spatial models of the structure and geomechanical state of the upper part of the earth's crust. //International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM. – 2018. – Vol.18. – P.467-474

DOI: 0.5593/sgem2018/1.4/S06.062 

66.             

GPS-derived velocity fields of northern tien shan from permanent stations in Kazakhstan 

DOI: 10.1109/IGARSS.2018.8518103 

(SJR 0,26; Q,  Procentile 34(Earth and Planetary Sciences General Earth and Planetary Sciences)     22(Computer Science Computer Science Applications)). 

This study presents and analyzed the data on GPS observations from 10 permanent stations located in the Northern Tien Shan, Kazakhstan. Analyzed data covers the 6 years, for the period of 2009-2015, which is acceptable for the geodynamic analysis. This investigation based on well-established processing method with GAMIT/GLOBK software package. The velocity field and motion rates of GPS sites were analyzed in the study. All stations showed northwest velocity field with the rate of 2 -7 mm per year. Motion rates of GPS sites across the Northern Tien Shan decrease northwestward in gradual way. The speeds and directions of the vector fields in South-eastern Kazakhstan do not contrary with modern concepts of regional geodynamics and crustal deformation rates. © 2018 IEEE 

Zhantayev Z.,Kaldybayev A.,Bibossinov A.,

Vilyaev A.,Turgumbayev A.,Nurakynov S

,GPS-derived velocity fields of northern tien shan from permanent stations in Kazakhstan. //International Geoscience and Remote Sensing Symposium (IGARSS). – 2018. – Vol.2018-July. – P.3189-3191

DOI:10.1109/IGARSS.2018.8518103

67.             

Determination of dissipative parameters of crank press 

DOI: 10.32014/2018.2518-170X.40

(SJR 0,32; Q3,  Procentile 40(Earth and Planetary Sciences-Geology)  37(Earth and Planetary Sciences - Geotechnical Engineering and Engineering Geology) ). 

The paper considers the determination of the dissipation coefficients of the crank press's assemblies (units). Slide-crank mechanism of the press performs stamping of various parts. In such a case, there are significant dynamic loads in the assemblies and connections of the press. Work features of the crank press are connected with shock cyclic loads. Dynamic research of crank presses, at present, is a critical task. Dynamic model of the crank press is represented as an oscillatory system with many degrees of freedom. The dynamic model of the crank press consists of lumped masses connected by elastic-dissipative elements. To calculate the dynamic model of the crank press, it is required to determine dissipation coefficients of individual sections of the drive shaft. Determination of the dissipation coefficients is of great complexity. In the case of vibrations of elastic systems, energy is dissipated in machine paits and mechanical energy is transferred into thermal. Losses of mechanical energy are caused by forces of inelastic resistance, called dissipative forces. The amplitudes of the resonance oscillations, the conditions for the excitation of parametric oscillations and self-oscillations depend on the dissipation coefficients. The determination of dissipative coefficients is based on available information on the dissipation coefficients of individual elastic- dissipative elements of the system. An example is given for determining the coefficients of dissipation of the crank press. The dynamic model of the crank press was compiled on the program complex SimulationX. The obtained results show that the dynamics of oscillations of the drive shaft of the crank press changes significantly after adjustment of the coefficients of dissipation. © 2018, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved. 

Tuleshov А.K.,Jomartov А.А., Determination of dissipative parameters of crank press. //News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences. – 2018. – Vol.6. – P.102-109

DOI: 10.32014/2018.2518-170X.40

68.             

Vector method for kinetostatic analysis of planar linkages 

DOI: 10.1007/s40430-018-1022-y

(SJR 0,43; Q2,  Procentile 74(Mathematics Applied Mathematics)      73(Engineering General Engineering)      71(Engineering

Automotive Engineering)       68(Engineering

Aerospace Engineering)       65(Engineering

Industrial and Manufacturing Engineering)        64(Engineering Mechanical Engineering) ). 

The article reviews the vector method of solving one of the important problems of the dynamic analysis of planar linkages—the kinetostatic analysis, which is to determine the reactions in kinematic pairs and to balance the moment (force) on the driving medium with a given law of motion of the mechanism. This problem is of great practical value when choosing the electric motor and calculating bearings in kinematic pairs. Proposed quality criteria for an optimal kinematic synthesis of linkage mechanism depend only on the geometrical dimensions and are independent of the forces and moments applied to the linkages. © 2018, The Brazilian Society of Mechanical Sciences and Engineering. 

Jomartov A.,Tuleshov A.,Vector method for kinetostatic analysis of planar linkages. //Journal of the Brazilian Society of Mechanical Sciences and Engineering. – 2018. – Vol.40.

DOI: 10.1007/s40430-018-1022-y

69.             

The model of a transition region with smoothness conditions of the second order 

DOI: 10.1063/1.5049032 

(SJR 0,18;  Procentile 17(Physics and Astronomy General Physics and Astronomy)). 

We consider, a problem of determining the position of the conjugate points of a combined trajectory, ensuring the conditions of tangency, continuity, and equality of the radius of curvature. When the arcs of a circular and elliptical trajectory are conjugated at the junction where, there is a common tangent, a jump in the centrifugal force occurs due to the inequality of the radii of curvature, which will lead to a shock / 1-2 /. © 2018 Author(s). 

Bostanov B.O.,Temirbekov E.S.,,Matin D.T

, The model of a transition region with smoothness conditions of the second ordert. //AIP Conference Proceedings. – 2018. – Vol.1997.

DOI: 10.1063/1.5049032

70.             

Noise resistance processing of speech signals 

DOI: 10.1109/EIConRus.2018.8317301 

(SJR 0,87;  Procentile 68). 

This article presents a new superior noise resistance method for processing speech signals. The proposed method of processing is based on adaptive sequential filtering. The presented results of processing speech signals demonstrate an increase in the quantitative parameters of noise resistance and reduction of errors in the detection of speech signals. The reliability of the obtained processing results is confirmed by cluster analysis. © 2018 IEEE. 

Zhumasheva Z.T..Altay Y.A.,Kremlev A.S,

Noise resistance processing of speech signals. //Proceedings of the 2018 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering, ElConRus 2018. – 2018.– P.1180-1185

DOI: 10.1109/EIConRus.2018.8317301

71.             

Synthesis of Reconfigurable Positioning Parallel Manipulator of a Class RoboMech

DOI: 10.1109/REMAR.2018.8449852 

(SJR 1,95;  Procentile 87). 

In this paper the methods of structural and dimensional synthesis of reconfigurable positioning parallel manipulator of a class RoboMech are presented. These parallel manipulators are formed by connecting the output point to the base by three closed kinematic chains: passive, active and negative. Parameters of synthesis of the active and negative closed kinematic chains are determined on the basis of the formulated Chebyshev and least-square approximations. © 2018 IEEE. 

Baigunchekov Z.,Ibrayev S.,Izmambetov M.,Zhumasheva Z.,Baigunchekov T., Naurushev B.,Mustafa A.,Sagyntay M. Synthesis of Reconfigurable Positioning Parallel Manipulator of a Class RoboMech. //2018 International Conference on Reconfigurable Mechanisms and Robots, ReMAR 2018 - Proceedings. – 2018.

DOI: 10.1109/REMAR.2018.8449852

72.             

Thermal Performance Simulation of a Heat Pump Assisted Solar Desalination System for Kazakhstan Climatic Conditions 

DOI: 110.1080/01457632.2018.1451246 

(SJR 0,18;Q4,  Procentile 15 (General Chemistry)). 

A numerical model has been proposed in this research work for predicting the energy performance of a heat pump assisted regenerative solar still using phase change heat storage materials such as paraffin wax and hydrate salt. The numerical model is based on energy and mass balance. The performance was simulated for Fort Sherchenko town in Kazakhstan. The performance comparison between the conventional solar still and heat pump assisted regenerative solar still with and without phase change materials are presented. Moreover, the influence of two different phase change materials on thermal performance of a heat pump assisted regenerative solar still are described. The numerical simulation results showed that heat pump assisted regenerative solar still is more energy efficient and produces better productivity when compared to the conventional simple solar still. The use of hydrate salt phase change heat storage material was found to be a good option for enhancing the performance of a heat pump assisted regenerative solar still. © 2018, © 2018 Taylor & Francis Group, LLC. 

Belyayev, Y., Mohanraj, M., Jayaraj, S., Kaltayev, A., Thermal Performance Simulation of a Heat Pump Assisted Solar Desalination System for Kazakhstan Climatic Conditions. //Heat Transfer Engineerings. – 2019. – Vol.40. – P.1060-1072

DOI: 10.1080/01457632.2018.1451246

73.             

Numerical simulation of a heat pump assisted solar dryer for continental climates 

DOI: 10.1016/j.renene.2019.04.119

(SJR 1,83;Q1,  Procentile 88 (Renewable Energy, Sustainability and the Environment)). 

A numerical model has been proposed in this work for predicting the energy performance of a heat pump assisted solar dryer under continental climates. The model is based on energy and mass balance. The energy performance comparison between heat pump dryer, solar dryer and heat pump assisted solar dryer are presented. The simulation was performed for four different climatic conditions of Almaty city in Kazakhstan. The simulation results showed that, the heat pump assisted solar dryer is more energy efficient when compared to the conventional solar dryers. It is also confirmed that, the conventional solar dryers are not suitable for continental climatic conditions having low ambient temperatures. The heat pump dryer reduces the initial moisture content of banana (on wet basis) from about 74% to the final moisture content (on wet basis) of about 19% in 21 h. Similarly, the solar dryer reduces the initial moisture content (wet basis) from about 74% to the final moisture content (wet basis) of about 20% in 35 h. The specific moisture extraction rate and coefficient of performance of a heat pump assisted solar dryer are estimated to be about 0.6 kg/kWh and 2.72, respectively. © 2019 Elsevier Ltd

Kuan M.,Shakir Y.,Mohanraj M.,Belyayev Y.,Jayaraj S.,Kaltayev A.,Numerical simulation of a heat pump assisted solar dryer for continental climates. //Renewable Energy. – 2019. – Vol.143. – P.214-225

DOI: 10.1016/j.renene.2019.04.119

74.             

Stabilization of the movement of a small spacecraft in a geostationary orbit

DOI: 0.32014/2019.2518-170X.162

(SJR 0,32;Q3  Procentile 40(Earth and Planetary Sciences-Geology)          37(Earth and Planetary Sciences - Geotechnical Engineering and Engineering Geology)).

A system for controlling the movement of a small spacecraft, which will later be part of a formation

located in the geostationary orbit for the remote sensing of the Earth is being considered.

The article assesses the effect of acting moments on the small spacecraft in the geostationary orbit and justifies

the choice of these moments in the motion simulation.

A motion control system for small spacecraft in the geostationary orbit using a P-controller (a controller with a

proportional control law) is proposed. The results of the simulation to verify the correctness of the proposed control

law are given.

Rakisheva, Z.B., Nakasuka, S., Doszhan, N.S., Ibrayev, G.E.,Stabilization of the movement of a small spacecraft in a geostationary orbit. //News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences. – 2019. – Vol.6. – P.112-120

DOI:10.32014/2019.2518-170X.162

75.             

Optimization Issues in the Problem of Small Satellite Attitude Determination and Control

DOI: 10.1007/978-3-030-10501-3_14

(SJR 0,52;Q2  Procentile 17(Mathematics -

Control and Optimization)).

The problems of synthesis of attitude determination and control system of small satellites regarding the influence of external perturbations due to their small mass and restrictions in using high-precision actuators, due to the limitations of energy budget and construction, are considered. The solutions to this problem are proposed involving the development of high-accuracy algorithms for satellite attitude determination and control, using the minimum set of sensors, various types of actuators, and optimization principles.

Rakisheva, Z., Sukhenko, A., Kaliyeva, N., Optimization Issues in the Problem of Small Satellite Attitude Determination and Control. //Springer Optimization and Its Applications,. – 2019. – Vol.144. – P.373-393

DOI: 10.1007/978-3-030-10501-3_14

76.             

Spatial variations in the caspian sea wave climate in 2002–2013 from satellite altimetry

DOI: 10.3176/earth.2019.16

(SJR 0,34;Q3,  Procentile 44(Earth and Planetary Sciences -General Earth and Planetary Sciences)  38(Environmental Science -

Water Science and Technology)).

The core properties of the wave climate and its changes in the Caspian Sea are established in terms of the annual mean significant wave height and its regional changes in 2002–2013 based on the outcome of the satellite altimetry mission JASON-1. Remotely estimated wave heights are validated against properties of the empirical distribution of instrumentally measured wave heights in the southern Caspian Sea and monthly averages of visually observed wave heights at three locations. A correction for systematic differences leads to very good correspondence between monthly averaged in situ and satellite data with a typical root mean square difference of 0.06 m. The average significant wave height in the Caspian Sea is 0.5–0.7 m in the northern basin of the sea, around 1.2 m in large parts of the central and southern basins and reaches up to 1.8 m in the northern segment of the central basin. The basin-wide average wave intensity varied insignificantly in the range of 1.02–1.14 m in 2002–2013. These estimates overestimate the wave heights by about 30% because low wave conditions are ignored. Substantial and statistically significant changes in the wave height occurred in certain areas. The wave height decreased by 0.019 ± 0.007 m/yr in the eastern segment of the central basin and by 0.04 ± 0.04 m/yr in the western segment of the southern basin. These changes can be explained by an increase in the frequency of westerly winds at the expence of southerly winds. Both basin-wide and regional extreme wave heights exhibit large interannual variations but do not show any significant trend. The patterns of changes in mean and extreme wave height are different. The average wave height has increased while the extreme wave height has decreased in the eastern segment of the southern basin. © 2019 Authors.

Kudryavtseva N.,Kussembayeva K.,Rakisheva Z.B.,Soomere T., Spatial variations in the caspian sea wave climate in 2002–2013 from satellite altimetry. //Estonian Journal of Earth Sciences. – 2019. – Vol.68. – P.225-240

DOI: 10.3176/earth.2019.16

77.             

Optimal structural synthesis of agricultural legged robot with minimal damage on soil

DOI: 10.1051/e3sconf/201913501027

(SJR 0,2;  Procentile 25(Energy General Energy)     20(Environmental Science General Environmental Science)     19(Earth and Planetary Sciences General Earth and Planetary Sciences)).

Optimal structural synthesis of agricultural legged robot is carried out, that causes minimal damage on soil and provide the most favorable conditions for plant growth. A rational structure of a legged robot with orthogonal propel based on kinematic decoupling of the motion is proposed. Most of traditionally used walking robots have universal "insect type" structure with multiple actuators to be synchronized which result in complex control. The alternative design is realizing a concept of functional independence of the actuators when each actuator is responsible for specified purpose: the main actuators are responsible for rectilinear translational motion of cabine/chassis whereas another group of actuators are responsible for adaptation purposes and anothers participate in turning/maneuvering. This allows to carry out the cabine/hull shifting and turning with a minimum number of actuators and simplified control. A new kinematic equivalent scheme of turning mechanism was proposed in order to optimize turning modes of the robot. The proposed planar model allows to determine the optimal parameters of the robot by applying multicriteria synthesis methods of parallel robot manipulators based on isotropy, maneuverability and other criteria. © The Authors, published by EDP Sciences, 2019.

Ibrayev S.,Jamalov N.,Ibrayeva A.,Mukhambetkaliyeva G., Optimal structural synthesis of agricultural legged robot with minimal damage on soil. //E3S Web of Conferences. – 2019. – Vol.135.

DOI: 10.1051/e3sconf/201913501027

78.             

[A comprehensive study to evaluate absolute uptake of carbon dioxide adsorption onto composite adsorbent]

[Une étude complète visant à mesurer l'absorption absolue de dioxyde de carbone sur un adsorbant composite]

DOI: 10.1016/j.ijrefrig.2019.01.014

(SJR 1.5; Q1 , Procentile 90(Engineering

Building and Construction)     88(Engineering

Mechanical Engineering)).

In this study, new composite adsorbent with enhanced thermal conductivity and adsorption capacity was synthesized and analyzed comprehensively for the development of compact CO 2 based adsorption cooling system. The consolidated composite was prepared employing activated carbon, graphene nanoplatelets and hydroxyl cellulose as a parent adsorbent, thermal conductivity enhancer, and binder, respectively. The surface area and pore volume of the composite were found to be 1778 ± 13 m 2 g −1 and 1.014 cm 3 g −1 , respectively. In addition, the composite showed 233% higher thermal conductivity compared to the parent activated carbon. Adsorption characteristics of CO 2 were measured at temperature ranging from 20 to 70 °C and pressures up to 5 MPa. Absolute uptake was evaluated from excess adsorption based on the following two methods: (i) the adsorbed phase volume is equal to the pore volume of the adsorbent; and (ii) the adsorbed phase volume is almost zero under low pressure and/or high temperature conditions. Furthermore, the averaging of above two methods was also taken for avoiding these two extreme assumptions. Obtained absolute adsorption uptake data were fitted with modified Dubinin-Astakhov and Tóth models. Results indicated good approximation between data points and models. The average isosteric heats of adsorption estimated using modified D-A and Tóth model were found to be 19.742 kJ mol −1 and 19.023 kJ mol −1 , respectively. The obtained characteristics of composite adsorbent are prerequisites for designing compact CO 2 based adsorption cooling systems. © 2019 Elsevier Ltd and IIR

 

Berdenova B.,Pal A.,Muttakin M.,Mitra S.,Thu K.,Saha B.B.,Kaltayev A.,

A comprehensive study to evaluate absolute uptake of carbon dioxide adsorption onto composite adsorbent. //International Journal of Refrigerations. – 2019. – Vol.100. – P.131-140

DOI: 10.1016/j.ijrefrig.2019.01.014

79.             

Grasps of robot manipulator when overloading solid high-radioactive elements and their calculation

DOI: 10.1007/978-3-030-03320-0_34

(SJR 0,16;Q4,  Procentile\ 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

In this paper considers the problem of simulating two grasping schemes of the robot manipulator, created by the authors for the overload of solid highly radioactive waste of fuel elements. Two schemes, previously proposed by the authors as grasps, are investigated. One - rod, the second - innovative with flexible actuators. For the grasps considered, some results are given: Static calculations for flat grasping models; 3D models of grasp; the strength and rigidity of one 3D model are calculated. © Springer Nature Switzerland AG 2019

Temirbekov E.S.,Kaiym T.T.,Ceccarelli M.,

Bostanov B.O.,Kaimov S.T.,Kaimov A.T.

Grasps of robot manipulator when overloading solid high-radioactive elements and their calculation. //Mechanisms and Machine Sciences. – 2019. – Vol.68. – P.316-323

DOI: 10.1007/978-3-030-03320-0_34

80.             

Combined trajectory of continuous curvature

DOI: 10.1007/978-3-030-03320-0_2

(SJR 0,16;Q4,  Procentile\ 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

The problem of creating a smooth combined trajectory and determining the position of the connection points ensuring the conditions of tangency, continuity and equality of the radius of curvature are considered. When the circular and conical arcs are conjoined at the junction point, there are nonsmoothness, there is a jump in the centrifugal force due to the inequality of the radii of curvature, which will lead to a strike. A method is used to insert a transitional section, the model of which is a conic, in order to exclude the undesirable impact effect. There are known methods of continuous, smooth connection of trajectories, which include contours, splines. The condition of equality of the radii of curvature is not fulfilled at such conjugations of these curves at the junction point. The mathematical condition of unstressed connection of trajectories is established. You can define the final connection point by specifying the starting point of the connection and using the condition of the unstressed connection. The proposed method allows to design complex technical forms and create on their basis new models of a smooth trajectory from conical arcs. © Springer Nature Switzerland AG 2019

Temirbekov E.S.,Bostanov B.O.,Dudkin M.V.,Kaimov S.T.,Kaimov A.T., Combined trajectory of continuous curvature. //Mechanisms and Machine Sciences. – 2019. – Vol.68. – P.12-19

DOI: 10.1007/978-3-030-03320-0_2

81.             

A gripper mechanism to automate overload process for fuel elements

DOI: 10.1007/978-3-030-00365-4_15

(SJR 0,16;Q4  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials)).

The paper reviews new and innovative ways to overload fuel elements of the intermediate container of solid high level radioactive waste into the cavity of the main container made from a strong block of rock, the implementation of which is planned to be performed with the use of innovative design gripper of the gripper of the manipulator of an industrial robot. Also reported main requirements for the functioning of a gripper and calculations. © 2019, Springer Nature Switzerland AG.

Kaimov S.,Kaimov A.T.,Ceccarelli M., Kaiym T.,Kaimova G.,Jomartov A.,Temirbekov E., A gripper mechanism to automate overload process for fuel elements. //Mechanisms and Machine Science. – 2019. – Vol.66. – P.118-128

DOI: 10.1007/978-3-030-00365-4_15

82.             

Computer modeling of residual stresses and strains at arc welding by modulated current

DOI: 10.1007/978-3-319-95630-5_265

(SJR 0,15.Q4;  Procentile 17(Engineering

Aerospace Engineering)      17(Engineering

Mechanical Engineering)     15(Engineering

Automotive Engineering)     13(Chemical Engineering

Fluid Flow and Transfer Processes)  ).

The article reviews the investigations of forming residual stresses and strains at arc welding by the modulated current. The maintenance of a favorable thermal cycle in a zone (that is close to a joint) is very important at welding many metals and their fusions. By changing a thermal cycle it is possible to reduce a grain value, to achieve a minimal speed of increasing elastoplastic strains in a zone of high temperature, to control a cooling rate and thus to receive favorable structures in a zone near to a joint. The numerical modeling of thermo-deformation processes of thin plates at arc welding by the modulated current is suggested in the paper. The complex of investigations depends on various technological parameters. The comparison of the received calculation data with experimental data has shown the acceptability of the positions and suppositions accepted in the design model. © 2019, Springer Nature Switzerland AG.

Nurguzhin M.,Danenova G.,Akhmetzhanov T., Computer modeling of residual stresses and strains at arc welding by modulated current. //Lecture Notes in Mechanical Engineering. – 2019. – Vol.0. – P.2453-2460

DOI: 10.1007/978-3-319-95630-5_265

83.             

Optimization Issues in the Problem of Small Satellite Attitude Determination and Control

DOI: 10.1007/978-3-030-10501-3_14

(SJR 0,52;Q2,  Procentile 17(Mathematics

Control and Optimization)).

The problems of synthesis of attitude determination and control system of small satellites regarding the influence of external perturbations due to their small mass and restrictions in using high-precision actuators, due to the limitations of energy budget and construction, are considered. The solutions to this problem are proposed involving the development of high-accuracy algorithms for satellite attitude determination and control, using the minimum set of sensors, various types of actuators, and optimization principles. © 2019, Springer Nature Switzerland AG.

Rakisheva Z.,Sukhenko A.,Kaliyeva N.,

Optimization Issues in the Problem of Small Satellite Attitude Determination and ControlDetermination of dissipative parameters of crank press. //Springer Optimization and Its Applicationss. – 2019. – Vol.144. – P.373-393

DOI: 10.1007/978-3-030-10501-3_14

84.             

Designing of a Crank press on the Basis of High Class Planar Linkages

DOI: 10.1007/978-3-030-20131-9_298

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

Currently, crank presses based on planar linkages received prevalence for presswork. One of the major problems of these presses is skewness of slide caused by eccentric application of deforming force and total linear elastic deformation of the press links and stamps under load. The skewness of the slide of the crank press reduces the accuracy of punching and causes its jamming and lead to its breakage. To eliminate these problems, it is proposed to use high-class planar linkages to design crank presses in the work. Schemes of planar linkages of class IV for designing of new crank presses were obtained. A new crank press was synthesized on the basis of planar linkages of class IV and its prototype was made. The tests of the prototype of the new crank press were carried out. © 2019, Springer Nature Switzerland AG.

Tuleshov А.K.,Jomartov А.А., Kuatova M.,Designing of a Crank press on the Basis of High Class Planar Linkagess. //Mechanisms and Machine Science. – 2019. – Vol.73. – P.3027-3036

DOI: 10.1007/978-3-030-20131-9_298

85.             

Modeling dynamics of planetary gears of crank press on simulationx

DOI: 10.1007/978-3-030-03320-0_5

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

The paper investigates the dynamics of a planetary gear of crank press. Currently, dynamic research of planetary gear of crank presses with account for elasticity of links, friction and backlashes, is a critical task. Dynamics of planetary gear of crank presses is well simulated on a software package SimulationX, with the help of universal basic structures. The paper shows that the dynamics of planetary mechanism with account for backlashes essentially differs from the dynamics of the ideal mechanism. The maximum acceleration of the carrier, when taking into account the backlashes in bearings of gears of the planetary gears of the crank press, increases by 30%. © Springer Nature Switzerland AG 2019

Tuleshov А.K.,Jomartov А.А., Modeling dynamics of planetary gears of crank press on simulationx. //Mechanisms and Machine Science. – 2019. – Vol.68. – P.41-48

DOI: 10.1007/978-3-030-03320-0_5

 

86.             

Analysis of the oscillating motion of a solid body on vibrating bearers

DOI: 10.3390/MACHINES7030058

(SJR 0,39;Q2  Procentile 83(Computer Science

Computer Science (miscellaneous))    82(Mathematics

Control and Optimization)      77(Engineering

Mechanical Engineering)       76(Engineering

Industrial and Manufacturing Engineering)        72(Engineering

Electrical and Electronic Engineering)       71(Engineering

Control and Systems Engineering)  ).

This article considers the oscillation of a solid body on kinematic foundations, the main elements of which are rolling bearers bounded by high-order surfaces of rotation at horizontal displacement of the foundation. Equations of motion of the vibro-protected body have been obtained. It is ascertained that the obtained equations of motion are highly nonlinear differential equations. Stationary and transitional modes of the oscillatory process of the system have been investigated. It is determined that several stationary regimes of the oscillatory process exist. Equations of motion have been investigated also by quantitative methods. In this paper the cumulative curves in the phase plane are plotted, a qualitative analysis for singular points and a study of them for stability are performed. In the Hayashi plane a cumulative curve of a body protected against vibration forms a closed path which does not tend to the stability of a singular point. This means that the vibration amplitude of a body protected against vibration does not remain constant in a steady state, but changes periodically. © 2019 by the authors.

Bissembayev K.,Jomartov A.,Tuleshov A.,Dikambay T., Analysis of the oscillating motion of a solid body on vibrating bearers. //Machines. – 2019. – Vol.6. – №58

DOI: 10.3390/MACHINES7030058

87.             

Dynamic analyses of a clutch of crank press

DOI: 10.32014/2019.2518-170X.132

(SJR 0,32;Q3,  Procentile 40(Earth and Planetary Sciences-Geology)          37(Earth and Planetary Sciences - Geotechnical Engineering and Engineering Geology)).

The paper studies the dynamic of a clutch of crank press. At present, the dynamic study of clutch of the crank presses, with account of interaction with other blocks, is a priority. The crank press contains movable parts and assemblies, the mass of which is from one hundred kilograms to several tons. These parts and assemblies are connected cyclically by clutch of crank press with high speeds and they are subject to large dyjnamic loads. To simu- late and analyze the movement of crank press with clutch, a software package: SimulationX is used. SimulationX is a software package for modeling and analyzing the dynamics and kinematics of cars, industrial equipment, electric, pneumatic and hydraulic drives, hybrid engines, etc. As a result of dynamic calculation, important dynamic para- meters of the crank press clutch and working slide are determined. It is shown that dynamic loads sharply increase almost in all blocks of the crank press when the clutch is switched on. © 2019, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved.

Tuleshov A.K.,Jomartov A.A.,Kuatova M.J.,

Halicioglu R., Dynamic analyses of a clutch of crank press. //News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences. – 2019. – Vol.5. – P.114-123

DOI: 10.32014/2019.2518-170X.132

88.             

Creating the form of a complicated treadmill

DOI: 10.1007/978-3-030-20131-9_38

(SJR 0,16; Q4 , Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials)).

The problem of creating a smooth complex trajectory and determining the position of the points of connection, providing the conditions of tangency, continuity and equality of the radius of curvature, is considered. When conjugation trajectory in the form of arcs of curves, there are non-smoothness at the junction, a centrifugal force jump occurs due to the inequality of the radii of curvature, which will lead to the impact. Known methods and methods for continuous, smooth connection of trajectories, which include lines, splines, as well as specially designed transition curves, such as a majorant curve, clothoid, elastic line, lemniscate and velocity curve. However, the proposed methods are less accurate and approximate. With such conjugations, the condition of equality of the radii of curvature of these curves at the junction point is not satisfied. To eliminate the undesirable effect of impact, the method of inserting a transition section is used, the model of which is a second-order curve (conic). An original method is proposed for analytically determining a smooth (smooth second order) transition region in the form of a conic. A mathematical condition has been established that ensures a smooth connection without a jump in the radius of curvature. By setting the start point of connection and using mathematical condition for smooth connection can determine the finish point of connection. The process of determining the smoothness of conjugation is proposed to be modeled by a link mechanism. The proposed method makes it possible to construct complex technical forms and to create on their basis new models of a smooth trajectory from arcs of high-order curves with a conical transition section. © 2019, Springer Nature Switzerland AG.

Temirbekov Y.S.,Bostanov B.O.,Karassayev B.A.,Tukeshova G.A

Creating the form of a complicated treadmill. //Mechanisms and Machine Science. – 2019. – Vol.73. – P.377-386

DOI: 10.1007/978-3-030-20131-9_38

89.             

Mechanics-mathematical model of conjugation of a part of a trajectory with conditions of continuity, touch and smoothness

DOI: 10.1007/978-3-030-12203-4_8

(SJR 0,16; Q4 , Procentile 30(Mathematics

General Mathematics)    18(Computer Science

General Computer Science)).

Development process of combined trajectories, in places of joining conic arcs, undesirable intermittent effects inevitably arise due to the second-order non-smoothness. A second order tangency is considered taking into account the curvature and the equality condition of the arcs curvature radii to be joined at the conjugation points. A kinematic method for determining joints on the basis of a rocker mechanism is given, which ensures smooth joints. © Springer Nature Switzerland AG 2019.

Bostanov B.O.,Temirbekov E.S.,

Dudkin M.V.,Kim A.I., Mechanics-mathematical model of conjugation of a part of a trajectory with conditions of continuity, touch and smoothness. //Communications in Computer and Information Science. – 2019. – Vol.998. – P.71-81

DOI: 10.1007/978-3-030-12203-4_8

90.             

Grasps of robot manipulator when overloading solid high-radioactive elements and their calculation

DOI: 10.1007/978-3-030-03320-0_34

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

In this paper considers the problem of simulating two grasping schemes of the robot manipulator, created by the authors for the overload of solid highly radioactive waste of fuel elements. Two schemes, previously proposed by the authors as grasps, are investigated. One - rod, the second - innovative with flexible actuators. For the grasps considered, some results are given: Static calculations for flat grasping models; 3D models of grasp; the strength and rigidity of one 3D model are calculated. © Springer Nature Switzerland AG 2019

Temirbekov E.S.,Kaiym T.T.,Ceccarelli M.,

Bostanov B.O.,Kaimov S.T.,Kaimov A.T.,Grasps of robot manipulator when overloading solid high-radioactive elements and their calculation. //Mechanisms and Machine Science. – 2019. – Vol.68. – P.316-323

DOI: 10.1007/978-3-030-03320-0_34

91.             

Combined trajectory of continuous curvature

DOI: 10.1007/978-3-030-03320-0_2

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

The problem of creating a smooth combined trajectory and determining the position of the connection points ensuring the conditions of tangency, continuity and equality of the radius of curvature are considered. When the circular and conical arcs are conjoined at the junction point, there are nonsmoothness, there is a jump in the centrifugal force due to the inequality of the radii of curvature, which will lead to a strike. A method is used to insert a transitional section, the model of which is a conic, in order to exclude the undesirable impact effect. There are known methods of continuous, smooth connection of trajectories, which include contours, splines. The condition of equality of the radii of curvature is not fulfilled at such conjugations of these curves at the junction point. The mathematical condition of unstressed connection of trajectories is established. You can define the final connection point by specifying the starting point of the connection and using the condition of the unstressed connection. The proposed method allows to design complex technical forms and create on their basis new models of a smooth trajectory from conical arcs. © Springer Nature Switzerland AG 2019

Temirbekov E.S.,Bostanov B.O.,Dudkin M.V.,Kaimov S.T.,Kaimov A.T., Combined trajectory of continuous curvature. //Mechanisms and Machine Science. – 2019. – Vol.68. – P.12-19

DOI: 10.1007/978-3-030-03320-0_2

92.             

A gripper mechanism to automate overload process for fuel elements

DOI: 10.1007/978-3-030-00365-4_15

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

The paper reviews new and innovative ways to overload fuel elements of the intermediate container of solid high level radioactive waste into the cavity of the main container made from a strong block of rock, the implementation of which is planned to be performed with the use of innovative design gripper of the gripper of the manipulator of an industrial robot. Also reported main requirements for the functioning of a gripper and calculations. © 2019, Springer Nature Switzerland AG.

Kaimov S.,Kaimov A.T.,Ceccarelli M.Kaiym T.,Kaimova G.,Jomartov A.,Temirbekov E.,

A gripper mechanism to automate overload process for fuel elements. //Mechanisms and Machine Science. – 2019. – Vol.66. – P.118-128

DOI: 10.1007/978-3-030-00365-4_15

93.             

Parallel manipulator of a class RoboMech for generation of horizontal trajectories family

DOI: 10.1007/978-3-030-20131-9_137

(SJR 0,16;Q4,  Procentile 23

(Engineering Mechanical Engineering)       18(Engineering Mechanics of Materials)).

In this paper the methods of structural and dimensional synthesis of parallel manipulator of a class RoboMech for reproducing the series of horizontal trajectories are developed. This parallel manipulator is formed by connecting the output point to the base using two closing kinematic chains: one passive and one active ones. The synthesis parameters of the active closing kinematic chain of RPR type are determined on the basis of the least-square approximation. © 2019, Springer Nature Switzerland AG.

Baigunchekov Z.,Izmambetov M.,Zhumasheva Z.,Baigunchekov T.,Mustafa A.,Parallel manipulator of a class RoboMech for generation of horizontal trajectories family. //Mechanisms and Machine Science. – 2019. – Vol.73. – P.1395-1402

DOI: 10.1007/978-3-030-20131-9_137

 

94.             

Numerical simulation on solar collector and cascade heat pump combi water heating systems in Kazakhstan climates

DOI: https://doi.org/10.1016/j.renene.2019.06.102

(SJR 0,83;Q1,  Procentile 88 (Renewable Energy, Sustainability and the Environment) ).

At low ambient temperatures, the heating capacity and coefficient of performance of a single stage vapour compression heat pump cycle is significantly getting reduced. The two stage cascade heat pump cycle operating with two different refrigerants provides a sustainable solution to lift the condenser temperature above 343 K. In this work, a numerical simulation model was developed for predicting the performance of a solar collector and two stage cascade heat pump combi water heating systems under Kazakhstan climatic conditions. The numerical simulation was performed for winter climatic conditions using nine refrigerant pairs such as, R32/R290, R32/R1234yf, R32/R134a, R410A/R290, R410A/R1234yf, R410A/R134a, R744/R290, R744/R1234yf and R744/R134a. The influences of solar irradiation, ambient temperature and condenser temperature are discussed. The solar collector and two stage heat pump combi heating system has about 30% energy savings when compared to the conventional two stage cascade heat pump without integration solar collectors. The R32/R290 refrigerant pair is having maximum coefficient of performance of 2.4 at 323 K condensing temperature and 263 K evaporating temperature. The refrigerant R744/R290 pair is identified as an environment friendly sustainable option in terms of its global warming impact for two stage cascade heat pump applications.

Yerdesh, Y., Abdulina, Z., Aliuly, A..Mohanraj, M., Kaltayev, A, Numerical simulation on solar collector and cascade heat pump combi water heating systems in Kazakhstan climates. //Renewable Energy. – 2020. – Vol.145. – P.1222-1234

DOI: https://doi.org/10.1016/j.renene.2019.06.102

95.             

A Study of Secular Perturbations of Translational-Rotational Motion in a Nonstationary Two-Body Problem Using Computer Algebra

DOI: 10.1134/S0965542520010054

(SJR 0,53;Q2,  Procentile 35(Mathematics -

Computational Mathematics) ).

A nonstationary two-body problem is considered such that one of the bodies has a spherically symmetric density distribution and is central, while the other one is a satellite with axisymmetric dynamical structure, shape, and variable oblateness. Newton’s interaction force is characterized by an approximate expression of the force function up to the second harmonic. The body masses vary isotropically at different rates. Equations of motion of the satellite in a relative system of coordinates are derived. The problem is studied by the methods of perturbation theory. Equations of secular perturbations of the translational-rotational motion of the satellite in analogues of Delaunay–Andoyer osculating elements are deduced. All necessary symbolic computations are performed using the Wolfram Mathematica computer algebra system. © 2020, Pleiades Publishing, Ltd.

Bizhanova, S.B., Minglibayev, M.Z., Prokopenya, A.N.,A Study of Secular Perturbations of Translational-Rotational Motion in a Nonstationary Two-Body Problem Using Computer Algebra. //Mechanisms and Machine ScienceComputational Mathematics and Mathematical Physics,. – 2020. – Vol.60. – P.26-35

DOI: 10.1134/S0965542520010054

96.             

Numerical calculation of the pressure drop and saturation of two-phase flow through porous medium

DOI: https://doi.org/10.2118/202570-MS

(SJR 0,  Procentile -).

Two-phase flow through a fibrous porous medium is numerically simulated. The goal of the study is to investigate the effect of numerical slip length on variation of pressure drop and saturation. The simulation is based on the numerical solution of incompressible Navier-Stokes equations for two-phase flow around a circular cylinder with radii in the ranges from 0.1 to 0.4. Variations of pressure drop and saturation in time are numerically calculated on simple and snap meshes for different values of surface tension (σ), viscosity ratio (M = μnw/μw), and mesh sizes. Also, numerical results using simple and snap meshes are compared. Numerical calculations are performed using the interFoam solver in OpenFOAM® finite volume library. The presented results show that solutions of saturation and pressure drop in time vary with mesh refinement, so the numerical slip length significantly affects the flow. For a coarser mesh the influence of numerical slip length is less than for a finer mesh, also as bigger the value of the viscosity ratio or surface tension as lower the influence of numerical slip length. The results show that the contact line motion significantly depends not only on the microstructure of the porous media, but also on the fluid properties (viscosity ratio, surface tension and etc.). Copyright 2020, Society of Petroleum Engineers.

Akasheva, Z., Assilbekov, B., Kudaikulov, A., Bolysbek, D.,Numerical calculation of the pressure drop and saturation of two-phase flow through porous medium. //Society of Petroleum Engineers - SPE Annual Caspian Technical Conference 2020, CTC 2020. – 2020. SPE Annual Caspian Technical Conference 2020, CTC 2020

DOI: https://doi.org/10.2118/202570-MS

97.             

Experimental and Theoretical Studies of the Efficiency of Autonomous Multistory Wind Power Plants

DOI: 10.1134/S1063784220010168

(SJR 0,3;Q3,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials)23(Physics and Astronomy -

Physics and Astronomy (miscellaneous)) ).

 The compact multistory wind power plants developed by authors for the first time in the world have been studied. Their efficiency due to the autonomy, compactness, and use of draft effect, which occurs between stories, has been shown. Thanks to this, compact multistory wind power plants will have some advantages in comparison with conventional wind power plants and separated wind-driven generators with the same power. © 2020, Pleiades Publishing, Ltd.

Kunakbaev, T., Tanasheva, N.K., Dyusembaeva, A.N., Shaimerdenova, K.M., Sagitzhanov, B.M.,Experimental and Theoretical Studies of the Efficiency of Autonomous Multistory Wind Power Plants. //Technical Physics. – 2020. – Vol.65. – P.37-40

DOI: 10.1134/S1063784220010168

98.             

Computer-aided creation of coordinate grid for blasted rock block

DOI: 10.25018/0236-1493-2020-8-0-40-51

(SJR 0,33;Q2,  Procentile 24(Engineering

Industrial and Manufacturing Engineering)  21(Environmental Science

Ecology)            19(Earth and Planetary Sciences Geotechnical Engineering and Engineering Geology)   17(Earth and Planetary Sciences Geology)                  9(Earth and Planetary Sciences Geochemistry and Petrology) ).

The notions of ‘coordinate grid of blast block’ and ‘coordinate grid of blasted block’ are defined. The computer-aided determination of the coordinate grid points for a blasted rock block is described. The starting point is using relationships of the initial parameters of a blast rock block such as height and the final pattern of the determined points in the blasted rock block. The governing factors of a blasted block coordinate grid are the broken-rock disintegration height and width dependent on physical and mechanical properties of rocks, physicochemical characteristics of explosives and on blasting pattern design. Considerable influence on arrangement of the blasted block coordinate grid points is exerted by the degree of fragmentation of rocks in horizontal and inclined layers. It is found that the degree of fragmentation tends to increase from the rear to the periphery of the broken rock pile, both horizontally and vertically. Based on the integration of all determinants of a broken rock pile after blasting, the analytical method is newly developed to determine the points and create the coordinate grid of a blasted block. The new computer program for the automatic creation of a blasted block coordinate grid takes into account the influences exerted by physical and mechanical properties of rocks, physicochemical characteristics of explosives and blasting pattern design. The program allows fast and sufficiently accurate position fixing of a blasted block coordinate grid points at different parameters and conditions of blasting. The resultant coordinate grids of blasted blocks are the tool for locating different elements inside broken-rock disintegration. © 2020 Publishing house Mining book. All rights reserved.

Rakishev, B.R., Rakisheva, Z.B., Orynbay, A.A,Computer-aided creation of coordinate grid for blasted rock block. //Mining Informational and Analytical Bulletin. – 2019. – Vol.2020(8). – P.40-51

DOI: 10.25018/0236-1493-2020-8-0-40-51

99.             

Automated determination of internal points of the coordinate grid of the blasted rock mass

DOI: 10.1051/e3sconf/202016800015

(SJR 0,2; Procentile 25(Energy

General Energy)   20(Environmental Science

General Environmental Science)             19(Earth and Planetary Sciences

General Earth and Planetary Sciences) ).

An automated method for determining the internal points of the coordinate grid of the blasted rock mass is described. It is based on the method of determining the nodal points of the coordinate grid of the blasted rock mass, which is based on taking into account the dependencies that connect the initial parameters of the blasting rock mass with the final location of the fixed points of the blasted rock mass. The determining factors are the specific height and width of the collapse, the coefficient of loosening of the rocks. The method of analysis of experimental and industrial mass explosions in quarries, methods of analytical geometry, matrix theory and linear algebra are used. For the first time in mining, an analytical method has been developed for determining the internal points of the coordinate grid of an exploded block. It includes the established functions of the movement of nodal points, components of the vectors of movement of nodal and internal points of the coordinate grid. The established dependencies allow one to determine the displacements of any point inside the coordinate grid of the blasted block from the initial coordinates of the nodal and internal points. © The Authors, published by EDP Sciences, 2020.

Rakishev, B., Rakisheva, Z., Auezova, A., Orynbay,, Automated determination of internal points of the coordinate grid of the blasted rock mass. //E3S Web of Conferences

DOI: 10.1051/e3sconf/202016800015

100.        

Digital hierarchical model of lumpiness of blasted rock mass

DOI: 10.1080/25726668.2020.1838775

(SJR 0,56;Q2,  Procentile 54(Earth and Planetary Sciences Geology)            48(Earth and Planetary Sciences Geotechnical Engineering and Engineering Geology) ).

The article describes the developed new digital hierarchical model of lumpiness of blasted rocks. It is based on a combination of classes of pieces of rock by size, taken as hierarchical levels of lumpiness of rocks, and the percentage of pieces in classes, adopted for its numerical characteristics. 7 classes of rocks by size are considered, each of which is characterized by the content of its pieces. The key component of the proposed model - the granulometric composition of the blasted rocks is determined by the block mass of the rocks, the size of the zones of intense crushing, the volume of crushed rocks due to the action of stress waves and reflected waves (I stage of explosion), detonation products (swelling effect of the explosion) (II stage of explosion), and collisions of large pieces when moving (III stage of explosion). The regularities of the formation of these explosion results are established depending on the different combination of the physicomechanical properties of the rocks of the massif, the chemophysical characteristics of the explosive used, the parameters of the explosives and the explosive method. © 2020 Institute of Materials, Minerals and Mining and The AusIMM Published by Taylor & Francis on behalf of the Institute and The AusIMM.

Rakishev, B., Rakisheva, Z.B., Auezova, A.M., Orynbay, A.A., Digital hierarchical model of lumpiness of blasted rock mass. //Mining Technology: Transactions of the Institute of Mining and Metallurgy. – 2020. – Vol.128(4).-P.228-237

DOI: 10.1080/25726668.2020.1838775

101.        

The Effect of Applied Pressure Function on Thermo-elastic Problem in the Dry Friction Clutches

DOI: 10.1007/s11668-020-01031-4

(SJR 0,25;Q3,  Procentile 36(Engineering

Safety, Risk, Reliability and Quality)       34(Engineering Mechanical Engineering)          29(Materials Science General Materials Science)            29(Engineering Mechanics of Materials)).

The main purpose of this paper is to investigate deeply the effect the contact pressure function on the thermo-mechanical behavior of the friction clutch system during the slipping time (heating stage). The other purpose is to explore theoretically the complex interaction among the contact pressure, sliding speed and frictional characteristics of frictional facings to specify the magnitude and distribution of the frictional heating generation on the contact surfaces of the dry friction clutch under different applied pressure. It was developed a numerical code based on finite element method (ANSYS/APDL 2019) to determine accurately the contact pressure, temperature and frictional heat generated on contact surfaces of the friction clutch disc that has two effective frictional faces at any instant during the slipping period. It was found a significant effect of the magnitude and variation of applied pressure during the heating phase on the surface temperatures, contact pressure and frictional heat generated. Where, the hot spot can be appeared when the applied pressure is constant. Under such circumstances, high amount of temperature and contact pressure focused on a small zone of the nominal contact area. This phenomenon is considered one of the main reasons for the early failure of the contacting surfaces of friction clutch. © 2020, ASM International.

Stojanovic, N., Abdullah, O.I., Rakisheva, Z.B., Lattieff, F.A., Hashim, E.T., The Effect of Applied Pressure Function on Thermo-elastic Problem in the Dry Friction Clutches. //Journal of Failure Analysis and Prevention. – 2020. – Vol.20(6). – P.2145-2152

DOI: 10.1007/s11668-020-01031-4

102.        

Experimental and Theoretical Studies of the Efficiency of Autonomous Multistory Wind Power Plants

DOI: 10.1134/S1063784220010168

(SJR 0,3;Q3,  Procentile 23(Physics and Astronomy -Physics and Astronomy (miscellaneous)) ).

 The compact multistory wind power plants developed by authors for the first time in the world have been studied. Their efficiency due to the autonomy, compactness, and use of draft effect, which occurs between stories, has been shown. Thanks to this, compact multistory wind power plants will have some advantages in comparison with conventional wind power plants and separated wind-driven generators with the same power. © 2020, Pleiades Publishing, Ltd.

Kunakbaev, T., Tanasheva, N.K., Dyusembaeva, A.N., Shaimerdenova, K.M., Sagitzhanov, B.M.,Experimental and Theoretical Studies of the Efficiency of Autonomous Multistory Wind Power Plants. //Technical Physics. – 2020. – Vol.65. – P.37-40

DOI: 10.1134/S1063784220010168

103.        

Synthesis of four-bar linkage with adjustable crank length for multi-path generation

DOI:10.18178/ijmerr.9.4.489-495

(SJR 0,19;Q4,  Procentile 26(Engineering

Mechanical Engineering)    22(Engineering

Control and Systems Engineering)     14(Computer Science Artificial Intelligence)  ).

Synthesis of planar mechanism with adjustable crank length for generating multiple paths is presented. Least-square approximation problem is considered which allows carrying out approximate synthesis with unlimited number of desired coupler point positions and with unlimited number of prescribed trajectories. By reducing the task to synthesis of two-element link with variable binary link length, which is called RPR-module, the analytical solution is obtained to determine not only constant design parameters (mechanism link lengths) but the adjusting parameter values as well. Thus the number of design variables for non-linear optimization (applied to find the remaining parameters) will be decreased significantly. The applied method is exemplified by synthesis of the mechanism for variable straight line generation, where the required height of the end-effector is adjusted by adjusting the crank length. Combined with random search technique the method allows to find all local minimums of the optimized goal function and thus allows to take full advantage from the considered mechanism structure during design. © 2020 by the authors.

Ibrayev S.,Jomartov A.,Tuleshov A.,Jamalov N.,Ibrayev A.,Mukhambetkalieva G.,Aidasheva G.,Kamal A.,Synthesis of four-bar linkage with adjustable crank length for multi-path generation. //International Journal of Mechanical Engineering and Robotics Research. – 2020. – Vol.9(4). – P.489-495

DOI: 10.18178/ijmerr.9.4.489-495

104.        

Designing of the stephenson ii six-link linkage actuator for servo mechanical press

DOI: 10.24247/ijmperdapr202053

(SJR 0;  Procentile 22(Engineering

Mechanical Engineering)    22(Engineering

Aerospace Engineering)    17(Chemical Engineerin Fluid Flow and Transfer Processes)  ).

Currently, servo mechanical presses with an actuator based on a slider-crank mechanism are widely used for stamping details. One of the major problems of these servo mechanical presses is inclination of slide caused by eccentric application of deforming force and total linear elastic deformation of the press links and stamps under load. The inclination of the slide of the servo mechanical press reduces the accuracy of punching and causes its jamming and lead to its breakage. To eliminate these problems, it is proposed to use Stephenson II six-bar linkage as an actuator of servo mechanical press. The scheme structure of the actuator of servo mechanical press with two connecting rods and one crank based on the Stephenson II six-bar linkage is obtained. Synthesis of the Stephenson II six-bar linkage was carried out. As a result of synthesis, a new actuator of servo mechanical press on the base of the Stephenson II six-bar linkage was obtained and its prototype was made. The prototype of the new actuator of servo mechanical press based on the Stephenson II six-bar linkage was tested. Testing of the prototype of the new actuator of servo mechanical press showed a good distribution of the efforts applied during the presswork and a better tolerance of the eccentric load. © TJPRC Pvt. Ltd.

Jomartov, A., Tuleshov, A., Jamalov, N., Kuatova, K., Kaimov, A., Designing of the stephenson ii six-link linkage actuator for servo mechanical press. //International Journal of Mechanical and Production Engineering Research and Development. – 2020. – Vol.10(2). – P.501-512

DOI: 10.24247/ijmperdapr202053

105.        

Optimal synthesis of planar linkages

DOI: 10.32014/2020.2518-170X.21

(SJR 0,32;Q3,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials)40(Earth and Planetary Sciences

Geology)            37(Earth and Planetary Sciences Geotechnical Engineering and Engineering Geology)   ).

This paper investigates the optimal synthesis of planar linkages. The main idea of this paper is to find the initial approximations based on the use of Burmester points for function generator linkages, path generator linkages, motion generator linkages. The results of the numerical synthesis of the linkages depend on the choice of the initial approximations. A more flexible method to the search for initial approximations is the method based on the use of Burmester points. This method allows the determination of the initial approximations analytically for three, four or five by established initial data of synthesis. In this case, the problem is reduced to determining the solutions of polynomials, respectively the second, third and fourth degree. The method consists in that the synthesized linkage is conditionally divided into initial kinematic chains and closing kinematic chains, and Burmester points are determined for each chain. After the choice of initial approximations, an objective function is formed according to the output criteria, depending on the synthesis parameters, using the Chebyshevsky (best) or quadratic approximation problems. The synthesis parameters of planar linkages are determined from objective function minimum. According to this method, a program for the synthesis of planar linkages has been developed. An example is included to demonstrate the method. © 2020, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved.

Tuleshov, А.K., Jomartov, А.А., Ibrayev, S., Jamalov, N.K., Halicioglu, R., A gripper mechanism to automate overload process for fuel elements. //News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences. – 2020. – Vol.1(439). – P.172-180

DOI: 10.32014/2020.2518-170X.21

106.        

Synthesis of four-bar linkage with adjustable crank length for multi-path generation

DOI:  10.18178/ijmerr.9.4.489-495

(SJR 0,19;Q4,  Procentile 26(Engineering

Mechanical Engineering)    22(Engineering

Control and Systems Engineering)     14(Computer Science

Artificial Intelligence) ).

Synthesis of planar mechanism with adjustable crank length for generating multiple paths is presented. Least-square approximation problem is considered which allows carrying out approximate synthesis with unlimited number of desired coupler point positions and with unlimited number of prescribed trajectories. By reducing the task to synthesis of two-element link with variable binary link length, which is called RPR-module, the analytical solution is obtained to determine not only constant design parameters (mechanism link lengths) but the adjusting parameter values as well. Thus the number of design variables for non-linear optimization (applied to find the remaining parameters) will be decreased significantly. The applied method is exemplified by synthesis of the mechanism for variable straight line generation, where the required height of the end-effector is adjusted by adjusting the crank length. Combined with random search technique the method allows to find all local minimums of the optimized goal function and thus allows to take full advantage from the considered mechanism structure during design. © 2020 by the authors.

Ibrayev S.,Jomartov A.,Tuleshov A.,Jamalov N.,Ibrayev A.,Mukhambetkalieva G.,Aidasheva G.,Kamal A.,Synthesis of four-bar linkage with adjustable crank length for multi-path generation. //International Journal of Mechanical Engineering and Robotics Research. – 2020. – Vol.9(4). – P.489-495

DOI: 10.18178/ijmerr.9.4.489-495

107.        

GNSS-Based Attitude Determination Techniques-A Comprehensive Literature Survey

DOI: 10.1109/ACCESS.2020.2970083

(SJR 0,59;Q1,  Procentile 87(Engineering

General Engineering)   81(Computer Science

General Computer Science)      70(Materials Science General Materials Science) ).

GNSS-based Attitude Determination (AD) of a mobile object using the readings of the Global Navigation Satellite Systems (GNSS) is an active area of research. Numerous attitude determination methods have been developed lately by making use of various sensors. However, the last two decades have witnessed an accelerated growth in research related to GNSS-based navigational equipment as a reliable and competitive device for determining the attitude of any outdoor moving object using data demodulated from GNSS signals. Because of constantly increasing number of GNSS-based AD methods, algorithms, and techniques, introduced in scientific papers worldwide, the problem of choosing an appropriate approach, that is optimal for the given application, operational environment, and limited financial funding becomes quite a challenging task. The work presents an extensive literature survey of the methods mentioned above which are classified in many different categories. The main aim of this survey is to help researchers and developers in the field of GNSS applications to understand pros and cons of the current state of the art methods and their computational efficiency, the scope of use and accuracy of the angular determination. © 2020 IEEE.

Raskaliyev, A., Patel, S.H., Sobh, T.M., Ibrayev, A., GNSS-Based Attitude Determination Techniques-A Comprehensive Literature Survey. //IEEE Access. – 2020. – Vol.8. – P.24873–24886, 8972427

DOI: 10.1109/ACCESS.2020.2970083

108.        

Some approaches to assessing the quality of masking noise interference of spatial noise generators

DOI:

(SJR 0,15;Q4,  Procentile 36(Computer Science

General Computer Science)        16(Mathematics Theoretical Computer Science) ).

The article discusses the characteristics of spatial electromagnetic noise generators and the formation of a broadband noise signal. It also describes a number of known methods and methods for assessing the quality of masking noise interference and their differences. Different approaches to measuring masking noise when evaluating its quality are proposed. The first method is based on the measurement of the instantaneous values of the amplitudes of the noise signal and the calculation of the entropy coefficient based on this method. The second method involves searching for correlation of masking noise signals of noise generators in different frequency subbands. The third approach is to use statistical and (or) graphical methods (tests) for randomness. The completeness and objectivity of assessing the quality of masking noise interference from spatial noise generators will be achieved by combining all the methods. © 2005 – ongoing JATIT & LLS.

Smailov, N., Batyrgaliyev, A., Seilova, N., Kuttybaeva, A., Ibrayev, A., Some approaches to assessing the quality of masking noise interference of spatial noise generators. //Journal of Theoretical and Applied Information Technology. – 2020. – Vol.98. – P.3555-3574

DOI:

109.        

Numerical simulation on solar collector and cascade heat pump combi water heating systems in Kazakhstan climates

DOI: 10.1016/j.renene.2019.06.102

(SJR 1,83;Q1,  Procentile 88 (Renewable Energy, Sustainability and the Environment) ).

At low ambient temperatures, the heating capacity and coefficient of performance of a single stage vapour compression heat pump cycle is significantly getting reduced. The two stage cascade heat pump cycle operating with two different refrigerants provides a sustainable solution to lift the condenser temperature above 343 K. In this work, a numerical simulation model was developed for predicting the performance of a solar collector and two stage cascade heat pump combi water heating systems under Kazakhstan climatic conditions. The numerical simulation was performed for winter climatic conditions using nine refrigerant pairs such as, R32/R290, R32/R1234yf, R32/R134a, R410A/R290, R410A/R1234yf, R410A/R134a, R744/R290, R744/R1234yf and R744/R134a. The influences of solar irradiation, ambient temperature and condenser temperature are discussed. The solar collector and two stage heat pump combi heating system has about 30% energy savings when compared to the conventional two stage cascade heat pump without integration solar collectors. The R32/R290 refrigerant pair is having maximum coefficient of performance of 2.4 at 323 K condensing temperature and 263 K evaporating temperature. The refrigerant R744/R290 pair is identified as an environment friendly sustainable option in terms of its global warming impact for two stage cascade heat pump applications. © 2019

Yerdesh Y.,Abdulina Z.,Aliuly A.,Belyayev Y.,Mohanraj M.,Kaltayev A

Numerical simulation on solar collector and cascade heat pump combi water heating systems in Kazakhstan climates. //Renewable Energy. – 2019. – Vol.145. – P.1222-1234

DOI: 10.1016/j.renene.2019.06.102

110.        

GPU Accelerated Modeling of In-Situ Leaching Process and Streamline Based Reactive Transport Simulation

DOI: 10.1016/j.procs.2020.11.016

(SJR 0,33;  Procentile 68(Computer Science

General Computer Science) ).

In present paper GPU acceleration modeling and Streamline based reactive transport simulation for uranium In-Situ leaching process is studied. In-Situ leaching (ISL) is a method of selective dissolution of mineral inside of rock by injection of leaching solution to the layer through the wells and chemical interaction of leaching solution with ore. Changing of flow rates on wells over time leads to increasing computational time and simulation of In-Situ leaching problem becomes resource-intensive problem. Acceleration of the hydrodynamic of the ISL process is carried out on GPU; parallelization of reactive mass transport due to reaction of leaching solute with mineral is performed by with multi-Threading and streamlines simulation. © 2020 Elsevier B.V.. All rights reserved.

Tungatarova, M.S., Kurmanseiit, M.B., Shayakhmetov, N.M., GPU Accelerated Modeling of In-Situ Leaching Process and Streamline Based Reactive Transport Simulation. //Procedia Computer Science. – 2020. – Vol.178. – P.145-152

DOI: 10.1016/j.procs.2020.11.016

111.        

Synthesis of four-bar linkage with adjustable crank length for multi-path generation

DOI:  10.18178/ijmerr.9.4.489-495

(SJR 0,19;Q4,  Procentile 26(Engineering

Mechanical Engineering)    22(Engineering

Control and Systems Engineering)     14(Computer Science

Artificial Intelligence) ).

Synthesis of planar mechanism with adjustable crank length for generating multiple paths is presented. Least-square approximation problem is considered which allows carrying out approximate synthesis with unlimited number of desired coupler point positions and with unlimited number of prescribed trajectories. By reducing the task to synthesis of two-element link with variable binary link length, which is called RPR-module, the analytical solution is obtained to determine not only constant design parameters (mechanism link lengths) but the adjusting parameter values as well. Thus the number of design variables for non-linear optimization (applied to find the remaining parameters) will be decreased significantly. The applied method is exemplified by synthesis of the mechanism for variable straight line generation, where the required height of the end-effector is adjusted by adjusting the crank length. Combined with random search technique the method allows to find all local minimums of the optimized goal function and thus allows to take full advantage from the considered mechanism structure during design. © 2020 by the authors.

Ibrayev S.,Jomartov A.,Tuleshov A.,Jamalov N.,Ibrayev A.,Mukhambetkalieva G.,Aidasheva G.,Kamal A.,Synthesis of four-bar linkage with adjustable crank length for multi-path generation. //International Journal of Mechanical Engineering and Robotics Research. – 2020. – Vol.9(4). – P.489-495

DOI: 10.18178/ijmerr.9.4.489-495

112.        

Designing of the stephenson ii six-link linkage actuator for servo mechanical press

DOI: 10.24247/ijmperdapr202053

(SJR 0;  Procentile 22(Engineering

Mechanical Engineering)    22(Engineering

Aerospace Engineering) 17(Chemical Engineering

Fluid Flow and Transfer Processes)  ).

Currently, servo mechanical presses with an actuator based on a slider-crank mechanism are widely used for stamping details. One of the major problems of these servo mechanical presses is inclination of slide caused by eccentric application of deforming force and total linear elastic deformation of the press links and stamps under load. The inclination of the slide of the servo mechanical press reduces the accuracy of punching and causes its jamming and lead to its breakage. To eliminate these problems, it is proposed to use Stephenson II six-bar linkage as an actuator of servo mechanical press. The scheme structure of the actuator of servo mechanical press with two connecting rods and one crank based on the Stephenson II six-bar linkage is obtained. Synthesis of the Stephenson II six-bar linkage was carried out. As a result of synthesis, a new actuator of servo mechanical press on the base of the Stephenson II six-bar linkage was obtained and its prototype was made. The prototype of the new actuator of servo mechanical press based on the Stephenson II six-bar linkage was tested. Testing of the prototype of the new actuator of servo mechanical press showed a good distribution of the efforts applied during the presswork and a better tolerance of the eccentric load. © TJPRC Pvt. Ltd.

Jomartov, A., Tuleshov, A., Jamalov, N., Kuatova, K., Kaimov, A., Designing of the stephenson ii six-link linkage actuator for servo mechanical press. //International Journal of Mechanical and Production Engineering Research and Development. – 2020. – Vol.10(2). – P.501-512

DOI: 10.24247/ijmperdapr202053

113.        

Dynamic Model of a Crank Press in the Process of Braking

DOI: 10.1007/978-3-030-30036-4_12

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

The paper studies the dynamic of a brake of crank press. At present, the dynamic research of brake of the crank presses, with account of interaction with other links, is a priority. The crank press contains movable parts and links, the mass of which is from one hundred kilograms to several tons. These parts and links are cyclically stopped when braking with a crank press almost instantaneously, and they are subject to high dynamic loads. To simulate and analyze the movement of crank press with brake, a software package: SimulationX is used. SimulationX is a software package for modeling and analyzing the dynamics and kinematics of cars, industrial equipment, electric, pneumatic and hydraulic drives, hybrid engines, etc. As a result of dynamic calculation, important dynamic parameters of the crank press brake and working ram are determined. It is shown that dynamic loads sharply increase almost in all links of the crank press when the brake is switched on. © 2020, Springer Nature Switzerland AG.

Jomartov, A., Tuleshov, A., Kuatova, M.,

Dynamic Model of a Crank Press in the Process of Braking. //Mechanisms and Machine Science. – 2020. – Vol.78. – P.141-150

DOI: 10.1007/978-3-030-30036-4_12

114.        

Structurally parametric synthesis and position analysis of a robomech class parallel manipulator with two end-effectors

DOI:

(SJR 0,26;Q3,  Procentile 49(Mathematics

Applied Mathematics) ).

In this paper, the methods of structurally parametric synthesis and position analysis of a RoboMech class parallel manipulator with two end-effectors are presented. This parallel manipulator is formed by connecting the two moving output objects with the fixed base by two passive, one active and two negative closing kinematic chains. Geometrical parameters of the active and negative closing kinematic chains are determined by the Chebyshev and least-square approximations. Position analysis is made on base of the conditional generalized coordinates method. © 2020 International Association of Engineers.

Baigunchekov Z.бNaurushev B.,Zhumasheva Z.,Mustafa A.,Kairov R., Amanov B, Structurally parametric synthesis and position analysis of a robomech class parallel manipulator with two end-effectors. //IAENG International Journal of Applied Mathematics. – 2020. – Vol.5(1-77). – P.1-11

DOI:

115.        

The First Type of Singularity of a 3-PRRS Parallel Manipulator

DOI: 10.1007/978-3-030-48989-2_38

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials)  ).

In this paper, the first type of singularity of a 3-PRRS parallel manipulator is considered. This type of singularity appears when the determinant of the Jacobian matrix of the generalized velocities goes to zero. In this case, the parallel manipulator loses one or more degrees of freedom (DOF). From the analysis of the degeneracy of the generalized velocities Jacobian matrix, the conditions of the first type singular configurations are determined.

Baigunchekov, Z., Laribi, M.A., Izmambetov, M., Zhumasheva, Z., Kaiyrov, R..,The First Type of Singularity of a 3-PRRS Parallel Manipulator. //Mechanisms and Machine Science. – 2020. – Vol.84. – P.356-363

DOI: 10.1007/978-3-030-48989-2_38

116.        

Performance analysis of crushed gravel sand heat storage and biomass evaporator-assisted single slope solar still

DOI:10.1007/s11356-021-15487-w

(SJR 0,85;Q2,  Procentile 79 (Environmental Science-Pollution)      76(Environmental Science-Health, Toxicology and Mutagenesis)          67(Environmental Science-Environmental Chemistry) ).

In this research work, the productivity, energy, exergy, and economic and enviro-economic performance in crushed gravel sand heat storage and biomass evaporator-assisted solar still (CGS-BSS) have been investigated and compared the results with conventional solar still (CSS) under the similar climatic conditions of Coimbatore City during the year 2019. The heat accumulated in crushed gravel sand and biomass evaporator have been used to preheat the inlet saline water and air vapor before entering into the solar still. This results in enhanced air vapor mixture temperature and evaporative heat transfer rate of CGS-BSS significantly. The productivity, energy, and exergy efficiencies in CGS-BSS were improved by 34.6%, 34.4%, and 35%, respectively when compared to CSS. In economic analysis, the payback period (PBP) in both CGS-BSS and CSS was estimated to be about 4.7 months and 3.9 months, respectively. Furthermore, in enviro-economic analysis, the CO2 emission estimated in CGS-BSS and CSS was about 16.63 tons and 8.18 tons, respectively during its lifetime of 10 years.

Ramasamy Dhivagar, Murugesan Mohanraj,Yerzhan Belyayev ,Performance analysis of crushed gravel sand heat storage and biomass evaporator-assisted single slope solar still. //Environmental Science and Pollution Research. – 2021.

DOI: 10.1007/s11356-021-15487-w

 

117.        

Walking Robot Leg Design Based on Translatory Straight-Line Generator

DOI:10.1007/978-3-030-58380-4_32

(SJR 0,21;Q3,  Procentile 37(Engineering

Mechanical Engineering)    32(Engineering

Mechanics of Materials)      30(Computer Science Computer Science Applications)     27(Mathematics Modeling and Simulation) ).

The planar straight-line generating linkages are of great interest for walking robot propel, especially to reduce power consumption and simplify control. Optimal design of six-link leg linkage is proposed with unlimited foot adaptation on terrain irregularities due to rectilinear and translatory motion of the output link, referred to as shin-link. The analytical method of synthesis is proposed based on least-square approximation. Due to minimizing directly the deviation from the desired output motion, the method does not suffer from so called branching defect and allows synthesizing the mechanism with desired transmission angle. Multi-criteria optimization attaining both the best accuracy and transmission angle is carried out and leg-linkage with maximal value of duration ratio of support and transference phases of the leg step cycle is presented. © 2021, CISM International Centre for Mechanical Sciences.

Ibrayev S.,Jamalov N.,Tuleshov A.,Jomartov A.,Ibrayev A.,Kamal A.,Ibrayeva A.,Bissembayev K., Walking Robot Leg Design Based on Translatory Straight-Line Generator. //CISM International Centre for Mechanical Sciences, Courses and Lectures. – 2021. – Vol.601. – P.264-271

DOI: 10.1007/978-3-030-58380-4_32

118.        

Dynamic Model of Servo Mechanical Press

DOI:10.1007/978-3-030-58380-4_21

(SJR 0,21;Q3,  Procentile 37(Engineering

Mechanical Engineering)    32(Engineering

Mechanics of Materials)      30(Computer Science Computer Science Applications)     27(Mathematics Modeling and Simulation)).

Servo mechanical press is a mechatronic system, consisting of a reducer, actuator and a servomotor with a controller. Control of the servo mechanical press is carried out with a help of the controller depending of technological process of pressing. Reverse kinematic analysis of the actuator of the servo mechanical press is presented in the work to determine the law of motion of a crank, reproducing the specified law of motion of the servo mechanical press slide. Obtained law of motion of the actuator’s crank of the servo mechanical press is necessary to choose the servomotor. Considering that servo mechanical press works by complex programmable motion large dynamic loads occur in its nodal points and links. The work proposes to simulate the dynamics of the servo mechanical press on the software complex SimulationX. Dynamic model of the servo mechanical press is composed with account for elastic-dissipative characteristics of the links and the parameters of the servomotor, for different laws of motion of the slide. A dynamic model of a 50-ton servo mechanical press is developed using the SimulationX software package. Calculation was carried out using real data of the existing 50 ton servo mechanical press. As a result of the calculation of the dynamic model of the servo mechanical press, the following data were obtained: motion, velocity, acceleration of the slide, torque effect on the crank, angular rate, torque effect, power of the servomotor.

Jomartov, A., Tuleshov, A., Jamalov, N.,Temirbekov, Y., Bostanov, B.,Dynamic Model of Servo Mechanical Press. //CISM International Centre for Mechanical Sciences, Courses and Lectures. – 2021. – Vol.601. – P.170-178

DOI: 10.1007/978-3-030-58380-4_21

119.        

Unsteady Resonant Oscillations of a Gyroscopic Rigid Rotor with Non-linear Damping and Non-linear Rigidity of the Elastic Support

DOI:10.1007/978-3-030-83594-1_9

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)     18(Engineering

Mechanics of Materials) ).

The article is concerned with the effect of linear and cubic non-linear damping of an elastic bearing on forced resonant vibrations of a gyroscopic vertical rigid rotor taking into account non-linear stiffness of the cubic nature of the bearing material. It is confirmed that non-linear cubic damping of the support can suppress not only the maximum amplitude, but also the amplitudes of forced unsteady oscillations behind the rotation speed corresponding to the maximum amplitude and the variation of its values in time along the main curve, around its mean values. It shifts the speed of rotation of the amplitude maximum, with rigid and soft non-linear elastic characteristics of the support material downwards and upwards, respectively. It is shown that with a “slow” increase in the shaft rotation speed, an increase in the absolute value of the angular acceleration is accompanied by a shift of the amplitude peak towards high speeds, with a “slow” decrease in the shaft rotation speed – towards low speeds with a decrease in the amplitude of oscillations. It is shown that during the rotor takeoff run, the maximum amplitude for the case with a rigid non-linear elasticity characteristic of the support material is greater than the same value for the case with a soft non-linear elasticity characteristic of the support material, and conversely, during the rotor run-down for similar cases.

Iskakov, Z., Jamalov, N., Bissembayev, K.,

Unsteady Resonant Oscillations of a Gyroscopic Rigid Rotor with Non-linear Damping and Non-linear Rigidity of the Elastic Support. //Mechanisms and Machine Science. – 2021. – Vol.85. – P.83-93

DOI: 10.1007/978-3-030-83594-1_9

120.        

Non-isothermal pore change model predicting CO2 adsorption onto consolidated activated carbon

DOI:https://doi.org/10.1016/j.ijheatmasstransfer.2021.121480

(SJR 1,71;Q1,  Procentile 98(Chemical Engineering Fluid Flow and Transfer Processes)     95(Engineering Mechanical Engineering)             94(Physics and Astronomy Condensed Matter Physics) ).

Accurate simulation and detailed description of the dynamics of the adsorption process play a significant role in forecasting the performance of new materials when used in various adsorption systems, like cooling/heating. The activated carbon (AC) consolidation allows improving the heat transfer rate inside the adsorption/desorption bed and compacting the systems. There are numerous mathematical models in literature for gas adsorption onto granular AC. But for consolidated AC, because of the absence of macropores, most assumptions that work well for granular AC may lead to significant discrepancies. Therefore, the present research proposes a new mathematical model for gas (CO2) adsorption onto consolidated adsorbent, a non-isothermal pore change model. The model takes into account the porosity and permeability changes due to the adsorption. The validation of the developed model is performed via comparison with the results obtained experimentally and numerically using an isothermal model. The effective Knudsen diffusion coefficient for the working pair is evaluated from porosity data. The rate of adsorption or mass transfer coefficient is estimated using the van't Hoff plot. The study results could be applied in the development of waste heat-driven cooling systems employing consolidated composite material as the adsorbent. The proposed mathematical model is also applicable for many other working pairs.

Berdenova, B., Pal, A., Saha, B.B., Kaltayev, A.,Non-isothermal pore change model predicting CO2 adsorption onto consolidated activated carbon. //International Journal of Heat and Mass Transfe. – 2021. – Vol.177. – 121480

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2021.121480

121.        

The use of the linear form of dynamical equations of the satellite attitude control system for its analysis and synthesis

DOI:https://doi.org/10.15632/jtam-pl/129071

(SJR 0,29;Q3,  Procentile 46(Engineering

Mechanical Engineering) ).

At present, the methods based on using linearized dynamical equations are applied for syn- thesis of an attitude control system of a satellite with nonlinear dynamics. Linearized equa- tions describe the satellite dynamics approximately, which is the main their disadvantage. This article shows that basing on the angular momentum theorem, the nonlinear dynamical equations of the satellite attitude control system can be represented in the form of linear differential equations with variable coefficients, which makes it possible to use engineering methods of stability analysis and analysis of transient quality in the process of synthesis of the satellite attitude control system.

Moldabekov, M., Sukhenko, A., Shapovalova, D., Yelubayev, S.,The use of the linear form of dynamical equations of the satellite attitude control system for its analysis and synthesis. //Journal of Theoretical and Applied Mechanics (Poland). – 2021. – Vol.59(1). – P.109-120

DOI: https://doi.org/10.15632/jtam-pl/129071

122.        

Multi-parametric dynamic analysis of a rolling bearings system

DOI:10.5545/sv-jme.2021.7178

(SJR 0,27;Q3,  Procentile 47(Engineering

Mechanical Engineering)        42(Engineering

Mechanics of Materials) ).

A method for calculating amplitudes and constructing frequency characteristics of forced and self-excited vibrations of a rotor-fluid-foundation system on rolling bearings with a non-linear characteristic based on the method of complex amplitudes and harmonic balance has been developed. Non-linear equations of motion of the rotor-fluid-foundation system are derived, and analytical methods of their solution are presented. Frequencies of fundamental and ultra-harmonic resonances are determined. The intervals between self-oscillation frequencies are estimated. The dependence of amplitudes on the amount of fluid in the rotor cavity, the mass of the foundation, linear imbalance, the value of the stiffness coefficient, and the damping coefficient is shown. © 2021 Journal of Mechanical Engineering.

Kydyrbekuly, A., Ibrayev, G.-G.A., Ospan, T., Nikonov, A.,Multi-parametric dynamic analysis of a rolling bearings system. //Strojniski Vestnik/Journal of Mechanical Engineeringe. – 2021. – Vol.67(9). – P.421-432

DOI: 10.5545/sv-jme.2021.7178

123.        

Modeling the Separation Process in Vertical Rotor Systems

DOI:10.1007/978-3-030-83594-1_11

(SJR 0,16;Q4,  Procentile 23(Engineering

Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

In this paper, we study and analyze the features of the separation process in a centrifugal force field, i.e. centrifugation process in vertical rotor systems. The main parameters that determine the time of separation of particles are revealed, and the optimal modes are indicated both from a constructive and from an economic point of view. Special cases of a fixed rotor are considered. Nonlinear differential equations of motion of a suspension particle are obtained, which do not have an exact solution. The study is carried out by analytical and numerical methods. The dependences of the slope angles of the tubes on the angular velocity of rotation of the rotor, sedimentation curves that allow one to estimate the time of deposition of particles, as well as the effect of the dispersed composition on the separation process as a whole, are obtained. The results of the study of this work allow us to determine with sufficient accuracy all the necessary characteristics working process of separation and sedimentation, and also allow in certain cases to exclude experimental work. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Kydyrbekuly, A.B., Ibrayev, G.E, Modeling the Separation Process in Vertical Rotor Systems. //Mechanisms and Machine Science. – 2021. – Vol.85. – P.104-113.

DOI: 10.1007/978-3-030-83594-1_11

124.        

A Comparison of Machine Learning Algorithms in Predicting Lithofacies: Case Studies from Norway and Kazakhstan

DOI:10.3390/en14071896

(SJR 0,6;Q2,  Procentile 49(Mathematics Applied Mathematics)23(Engineering Mechanical Engineering)       18(Engineering

Mechanics of Materials) ).

Defining distinctive areas of the physical properties of rocks plays an important role in reservoir evaluation and hydrocarbon production as core data are challenging to obtain from all wells. In this work, we study the evaluation of lithofacies values using the machine learning algorithms in the determination of classification from various well log data of Kazakhstan and Norway. We also use the wavelet-transformed data in machine learning algorithms to identify geological properties from the well log data. Numerical results are presented for the multiple oil and gas reservoir data which contain more than 90 released wells from Norway and 10 wells from the Kazakhstan field. We have compared the the machine learning algorithms including KNN, Decision Tree, Random Forest, XGBoost, and LightGBM. The evaluation of the model score is conducted by using metrics such as accuracy, Hamming loss, and penalty matrix. In addition, the influence of the dataset features on the prediction is investigated using the machine learning algorithms. The result of research shows that the Random Forest model has the best score among considered algorithms. In addition, the results are consistent with outcome of the SHapley Additive exPlanations (SHAP) framework. Copyright: © 2021 by the authors.

Merembayev, T., Kurmangaliyev, D., Bekbauov, B., Amanbek, Y.,

A Comparison of Machine Learning Algorithms in Predicting Lithofacies: Case Studies from Norway and Kazakhstan. //Energies. – 2021. – Vol.14(7). – P.1896

DOI: 10.3390/en14071896

125.        

Kinematic synthesis method and eccentricity effects of a Stephenson mechanism

DOI:10.5194/ms-12-1-2021

(SJR 0,31;Q2,  Procentile 52(Engineering

Industrial and Manufacturing Engineering)     50(Engineering Mechanical Engineering)      48(Engineering Civil and Structural Engineering)      48(Chemical Engineering

Fluid Flow and Transfer Processes)      46(Engineering Mechanics of Materials)       45(Engineering Control and Systems Engineering) ).

When implementing the technological process on crank presses, it is necessary to provide a predetermined working cycle of the slider motion: fast lifting, dwell, and slow lowering. The cycle cannot be realized without controlling the motor. In addition, using controllable motors increases the manufacturing cost. Due to the geometric and kinematic capabilities of the mechanism, changing the kinematics of the working link is the best choice. Thanks to the use of the Stephenson II mechanism, the slider skew is eliminated due to the parallel connecting rods and the increased area of slider contact. This study presents a numerical method for kinematic synthesis of the Stephenson mechanism that has kinematic advantages. The method is based on mean square deviation which is the minimizing of an objective function. Thanks to the proposed synthesis method, approximate dwell movement can be performed when the slider is on the bottom dead center. In this study, values of the crank length and parallel connecting rods' lengths, angular coordinates of the crank and connecting rods, and the eccentricity of the guide slider relative to the crank rotation axis were obtained. It is observed that eccentricity affects the lower forward and higher backward speed of the slider. The kinematic results of the slider movement are comparatively presented in this article. © 2021 Copernicus GmbH. All rights reserved.

Tuleshov, A., Halicioglu, R., Shadymanova, A., Kuatova, M.,

Kinematic synthesis method and eccentricity effects of a Stephenson mechanism. //Mechanical Sciences. – 2021. – Vol.12(1). – P.1-8

DOI: 10.5194/ms-12-1-2021

126.        

Analytical method for determination of internal forces of mechanisms and manipulators

DOI:10.3390/robotics7030053

(SJR 0,39; Q3,  Procentile 70(Control and Optimization) 67(Mechanical Engineering)       53(Artificial Intelligence) ).

This paper presents a theory for the analytical determination of internal forces in the links of planar linkage mechanisms and manipulators with statically determinate structures, considering the distributed dynamic loads. Linkage mechanisms and manipulators were divided into elements and joints. Discrete models were created for both the elements and the entire mechanism. The dynamic equations of equilibrium for the discrete model of the elements and the hinged and rigid joints, under the action of longitudinal and transverse distributed dynamic trapezoidal loads, were derived. In the dynamic equations of the equilibrium of the discrete model of the elements and joints, the connections between the components of the force vector in the calculated cross-sections and the geometric, physical, and kinematic characteristics of the element were established for its plane-parallel motion. According to the developed technique, programs were created in the Maple system, and animations of the motion of the mechanisms were produced. The links were constructed with the intensity of transverse- and longitudinal-distributed dynamic loads, bending moments, and shearing and normal forces, depending on the kinematic characteristics of the links. © 2018 by the authors.

Utenov, M., Sobh, T., Baigunchekov, Z., Zhilkibayeva, S., Patel, S.,

Analytical method for determination of internal forces of mechanisms and manipulators. //Robotics,. – 2018. – Vol.7(3). – P.53

DOI: 10.3390/robotics7030053

127.        

Synthesis of Reconfigurable Positioning Parallel Manipulator of a Class RoboMech
 

 

DOI:10.1109/REMAR.2018.8449852

(SJR 0,18;).

In this paper the methods of structural and dimensional synthesis of reconfigurable positioning parallel manipulator of a class RoboMech are presented. These parallel manipulators are formed by connecting the output point to the base by three closed kinematic chains: passive, active and negative. Parameters of synthesis of the active and negative closed kinematic chains are determined on the basis of the formulated Chebyshev and least-square approximations. © 2018 IEEE.

Baigunchekov Z.,Ibrayev S.,Izmambetov M.,Zhumasheva Z.,Baigunchekov T.,Naurushev B.,Mustafa A.,Sagyntay M.,

Synthesis of Reconfigurable Positioning Parallel Manipulator of a Class RoboMech. //2018 International Conference on Reconfigurable Mechanisms and Robots, ReMAR 2018 - Proceedings. – 2018. – 8449852
DOI: 10.1109/REMAR.2018.8449852

128.        

Synthesis of cartesian manipulator of a class RoboMech

DOI:10.1007/978-3-030-00365-4_9

(SJR 0,172; Q4,  Procentile 25(Mechanical Engineering) 19(Mechanics of Materials) ).

In this paper the methods of structural and dimensional synthesis of Cartesian manipulators of a class RoboMech reproducing the series of orthogonal trajectories are developed. The Cartesian manipulator of a class RoboMech is formed by connecting the output point to the base by three closing kinematic chains: one passive and two active ones. Parameters of synthesis of active closing kinematic chains are determined on the basis of the formulated problem of least-square approximation. © 2019, Springer Nature Switzerland AG.

Baigunchekov Z.,Ibrayev S.,Izmambetov M.,Baigunchekov T.,Naurushev B.,Mustafa A.,Synthesis of cartesian manipulator of a class RoboMech. //RoboticsMechanisms and Machine Science,. – 2019. – Vol.66. – P.69-76

DOI: 10.1007/978-3-030-00365-4_9

129.        

Parallel manipulator of a class RoboMech for generation of horizontal trajectories family

 

 

DOI:10.1007/978-3-030-20131-9_137

(SJR 0,172; Q4,  Procentile 23(Mechanical Engineering) 18(Mechanics of Materials) ).

In this paper the methods of structural and dimensional synthesis of parallel manipulator of a class RoboMech for reproducing the series of horizontal trajectories are developed. This parallel manipulator is formed by connecting the output point to the base using two closing kinematic chains: one passive and one active ones. The synthesis parameters of the active closing kinematic chain of RPR type are determined on the basis of the least-square approximation. © 2019, Springer Nature Switzerland AG.

Baigunchekov, Z., Izmambetov, M., Zhumasheva, Z., Baigunchekov, T., Mustafa, A.,Parallel manipulator of a class RoboMech for generation of horizontal trajectories family. //Mechanisms and Machine Science,. – 2019. – Vol.73. – P.1395-1402

DOI: 10.1007/978-3-030-20131-9_137

130.        

Geometry and Inverse Kinematics of 3-PRRS Type Parallel Manipulator

DOI:10.1007/978-3-030-19648-6_2

(SJR 0; Q4,  Procentile 27(Control and OptimizationGeneral Computer Science) 22(Control and Systems Engineering)).

In this paper the methods of structural synthesis and inverse kinematics of 3-PRRS type parallel manipulator (PM) are developed. This PM is formed by connecting of a moving platform with a fixed base by three passive closing kinematic chains of PRRS type. Constant and variable parameters characterizing the geometry of links and relative motions of elements of joints are defined. Inverse kinematics of the PM is solved of the basis of solution of the loop-closure matrix equations of the legs. © Springer Nature Switzerland AG 2020.

Baigunchekov Z.,Laribi M.A.,Mustafa A.,Kaiyrov R.,Amanov B.,Kassinov A., Geometry and Inverse Kinematics of 3-PRRS Type Parallel Manipulator. //Advances in Intelligent Systems and Computing,. – 2019. – Vol.980. – P.12-18

DOI: 10.1007/978-3-030-19648-6_2

131.        

Structurally Parametric Synthesis of a RoboMech Class Parallel Manipulator with Three DOF

 

DOI:10.1007/978-3-030-48989-2_40

(SJR 0,172; Q4,  Procentile 23(Mechanical Engineering)       18(Mechanics of Materials)).

This paper presents the methods of structural-parametric synthesis of a parallel manipulator with three DOF (Degree of Freedom) working in a cylindrical coordinate system. This parallel manipulator belongs to the RoboMech class because it works under the setting laws of motions of the end-effector and actuators, which simplifies the control system and improves its dynamics. Parallel manipulators of a RoboMech class work with certain structural schemes and geometrical parameters of their links. The considered parallel manipulator is formed by connecting the output object to a base using one passive and two active closing kinematic chains. The geometrical parameters of their links are determined on the base of the least-square approximations. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2020.

Baigunchekov, Z., Tarek, S., Patel, S., Mustafa, A.,Structurally Parametric Synthesis of a RoboMech Class Parallel Manipulator with Three DOF. //Mechanisms and Machine Science. – 2020. – Vol.84. – P.371-379

DOI: 10.1007/978-3-030-48989-2_40

132.        

The First Type of Singularity of a 3-PRRS Parallel Manipulator

, 2020, 84, стр. 356–363

 

DOI:10.1007/978-3-030-48989-2_38

(SJR 0,172; Q4,  Procentile 23(Mechanical Engineering)       18(Mechanics of Materials))

In this paper, the first type of singularity of a 3-PRRS parallel manipulator is considered. This type of singularity appears when the determinant of the Jacobian matrix of the generalized velocities goes to zero. In this case, the parallel manipulator loses one or more degrees of freedom (DOF). From the analysis of the degeneracy of the generalized velocities Jacobian matrix, the conditions of the first type singular configurations are determined. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2020.

Baigunchekov, Z., Laribi, M.A., Izmambetov, M., Zhumasheva, Z., Kaiyrov, R.,The First Type of Singularity of a 3-PRRS Parallel Manipulator. //Mechanisms and Machine Science. – 2020. – Vol.84. – P.356-363

DOI: 10.1007/978-3-030-48989-2_38

133.        

Inverse Kinematics of a 3-PRPS Type Parallel Manipulator

 

DOI:10.1007/978-3-030-48989-2_39

(SJR 0,172; Q4,  Procentile 23(Mechanical Engineering)       18(Mechanics of Materials))

In this paper, geometry and inverse kinematics of a 3-PRPS type parallel manipulator are studied. This parallel manipulator is formed by connecting a moving platform with a base by three passive closing kinematic chains of a PRPS type. Constant and variable parameters characterizing the geometry of links and relative movements of elements of kinematic pairs, respectively, are defined, and the matrices of binary links and kinematic pairs are derived. On the base of these matrices of binary links and kinematic pairs, the inverse kinematics problem is solved and numerical results are presented. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2020.

Baigunchekov, Z., Zeghloul, S., Kassinov, A.,Inverse Kinematics of a 3-PRPS Type Parallel Manipulator. //Mechanisms and Machine Science. – 2020. – Vol.84. – P.364-370

DOI: 10.1007/978-3-030-48989-2_39

134.        

Structurally parametric synthesis and position analysis of a robomech class parallel manipulator with two end-effectors

DOI:

(SJR 0,259; Q3,  Procentile 49(Applied Mathematics))

In this paper, the methods of structurally parametric synthesis and position analysis of a RoboMech class parallel manipulator with two end-effectors are presented. This parallel manipulator is formed by connecting the two moving output objects with the fixed base by two passive, one active and two negative closing kinematic chains. Geometrical parameters of the active and negative closing kinematic chains are determined by the Chebyshev and least-square approximations. Position analysis is made on base of the conditional generalized coordinates method. © 2020 International Association of Engineers.

Baigunchekov Z.,Naurushev B.,Zhumasheva Z.,Mustafa A.,Kairov R.,

Amanov B,Structurally parametric synthesis and position analysis of a robomech class parallel manipulator with two end-effectors. //IAENG International Journal of Applied Mathematics. – 2020. – Vol.5. – P.1-11

DOI:

135.        

A robomech class parallel manipulator with three degrees of freedom

2020, 3(7-105), стр. 44–56

 

DOI:10.15587/1729-4061.2020.203131

(SJR 0,268; Q3,  Procentile 56(Applied Mathematics)       54(Management of Technology and Innovation) 52(Industrial and Manufacturing Engineering) 49(Industrial and Manufacturing Engineering) 46(Industrial and Manufacturing Engineering) 46(Energy Engineering and Power Technology) 45(Computer Science Applications) 44(Control and Systems Engineering))

This paper presents the methods of structural-parametric synthesis and kinematic analysis of a parallel manipulator with three degrees of freedom working in a cylindrical coordinate system. This parallel manipulator belongs to a RoboMech class because it works under the set laws of motions of the end-effector and actuators, which simplifies the control system and improves its dynamics. Parallel manipulators of a RoboMech class work with certain structural schemes and geometrical parameters of their links. The considered parallel manipulator is formed by connecting the output point to a base using one passive and two active closing kinematic chains (CKC). Passive CKC have zero degree of freedom and it does not impose a geometrical constraint on the movement of the output point, so the geometrical parameters of the links of the passive CKC are freely varied. Active CKCs have active kinematic pairs and they impose geometrical constraints on the movement of the output point. The geometrical parameters of the links of the active CKCs are determined on the basis of the approximation problems of the Chebyshev and least-square approximations. For this, the equations of geometrical constraints are derived in the forms of functions of weighted differences, which are presented in the forms of generalized (Chebyshev) polynomials. This leads to linear iterative problems. The direct and inverse problems of the kinematics of the investigated parallel manipulator are solved. In the direct kinematics problem, the coordinates of the output point are determined by the given position of the input links. In the inverse kinematics problem, the positions of the input links are determined by the coordinates of the output point. The direct and inverse problems of the kinematics of the investigated parallel manipulator are reduced to solving problems on the positions of Sylvester dyads. Numerical results of structural-parametric synthesis and kinematic analysis of the considered parallel manipulator are presented. The numerical results of the kinematic analysis show that the maximum deviation of the movement of the output point from the orthogonal trajectories is 1.65 %

Baigunchekov, Z., Mustafa, A., Sobh, T., Patel, S., Utenov, M.,A robomech class parallel manipulator with three degrees of freedom. //A robomech class parallel manipulator with three degrees of freedom. – 2020. – Vol.3(7-105). – P.44-56

DOI: 10.15587/1729-4061.2020.203131

136.        

Direct kinematics of a 3-PRRS type parallel manipulator

 

DOI:10.18178/ijmerr.9.7.967-972

(SJR 0,187; Q4,  Procentile 23(Mechanical Engineering)       18(Mechanics of Materials))

This paper is devoted to solving the direct kinematics of a novel 3-PRRS type parallel manipulator with six-degrees-of-freedom, where P, R, and S are prismatic, revolute and spherical kinematic pairs respectively. This parallel manipulator is formed by connecting a moving platform with a fixed platform (base) through three closing kinematic chains of a PRRS type in which the prismatic kinematic pairs and their adjacent revolute kinematic pairs are active and they are located on a fixed platform. The constant and variable parameters of the considered parallel manipulator characterizing its geometry and kinematics respectively are determined. In the direct kinematics, the positions of the moving platform are determined by the known constant parameters of the links and the given variable parameters of the active kinematic pairs. An analysis of the obtained equations of the direct kinematics showed that the variable parameters of the active prismatic kinematic pairs are set free, and these equations are reduced to a 16 –order polynomial equation with the passive kinematic pairs variables. Numerical examples of the considered parallel manipulator’s direct kinematics are presented, and the results showed that the direct kinematics equations have four solutions corresponding to the four assemblies of the parallel manipulator.

Baigunchekov, Z.Z., Kaiyrov, R.A.,Direct kinematics of a 3-PRRS type parallel manipulator. //International Journal of Mechanical Engineering and Robotics Research. – 2020. – Vol.9(7). – P.967-972

DOI: 10.18178/ijmerr.9.7.967-972

137.        

Inverse Kinematics and Workspace of a 3-PRRS Type Parallel Manipulator

 

DOI:10.1007/978-3-030-75271-2_8

(SJR 0,159; Q4,  Procentile 23(Mechanical Engineering)       18(Mechanics of Materials))

In this paper, methods of workspace analysis of a 3-PRRS type parallel manipulator are described. The equations of spheres and circles on these spheres, along which the center of the moving platform can move, are derived, and it is shown that the total reachable area of these spheres is the workspace of the considered parallel manipulator. Numerical examples of defining the workspace of the 3-PRRS type parallel manipulator are presented. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Baigunchekov, Z., Laribi, M.A., Kaiyrov, R., Zholdassov, E.,Inverse Kinematics and Workspace of a 3-PRRS Type Parallel Manipulator. //Mechanisms and Machine Science. – 2021. – Vol.103. – P.71-78

DOI: 10.1007/978-3-030-75271-2_8

138.        

Kinematic synthesis and analysis of the robomech class parallel manipulator with two grippers

, 2021, 10(3), 99

 

DOI:10.3390/robotics10030099

(SJR 0,390; Q2,  Procentile 67(Mechanical Engineering)   70(Control and Optimization) 53(Artificial Intelligence))

In this paper, methods of kinematic synthesis and analysis of the RoboMech class parallel manipulator (PM) with two grippers (end effectors) are presented. This PM is formed by connecting two output objects (grippers) with a base using two passive and one negative closing kinematic chains (CKCs). A PM with two end effectors can be used for reloading operations of stamped products between two adjacent main technologies in a cold stamping line. Passive CKCs represent two serial manipulators with two degrees of freedom, and negative CKC is a threejoined link with three negative degrees of freedom. A negative CKC imposes three geometric constraints on the movements of the two output objects. Geometric parameters of the negative CKC are determined on the basis of the problems of the Chebyshev and leastsquare approximations. Problems of positions and analogues of velocities and accelerations of the PM with two end effectors have been solved. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Baigunchekov, Z., Laribi, M.A., Mustafa, A., Kassinov, A.,Kinematic synthesis and analysis of the robomech class parallel manipulator with two grippers

. //Robotics. – 2021. – Vol.10(3). – P.99

DOI: 10.3390/robotics10030099

139.        

Structural-parametric synthesis of the robomech class parallel mechanism with two sliders

 

 

DOI:10.3390/app11219831

(SJR 0,435; Q2,  Procentile 71(General Engineering)       62(Instrumentation) 59(Fluid Flow and Transfer Processes) 56(Computer Science Applications) 51(General Materials Science) 50(Process Chemistry and Technology))

This paper addresses the structural-parametric synthesis and kinematic analysis of the RoboMech class of parallel mechanisms (PM) having two sliders. The proposed methods allow the synthesis of a PM with its structure and geometric parameters of the links to obtain the given laws of motions of the input and output links (sliders). The paper outlines a possible application of the proposed approach to design a PM for a cold stamping technological line. The proposed PM is formed by connecting two sliders (input and output objects) using one passive and one negative closing kinematic chain (CKC). The passive CKC does not impose a geometric constraint on the movements of the sliders and the geometric parameters of its links are varied to satisfy the geometric constraint of the negative CKC. The negative CKC imposes one geometric constraint on the movements of the sliders and its geometric parameters are determined on the basis of the Chebyshev and least-square approximations. Problems of positions and analogues of velocities and accelerations of the considered PM are solved to demonstrate the feasibility and effectiveness of the proposed formulations and case of study. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Baigunchekov, Z., Laribi, M.A., Carbone, G.,Mustafa A.,Amanov, B., Zholdassov, Y..,Structural-parametric synthesis of the robomech class parallel mechanism with two sliders. //Applied Sciences (Switzerland). – 2021. – Vol.11(21). – P.9831

DOI: 10.3390/app11219831

140.        

Non-isothermal pore change model predicting CO2 adsorption onto consolidated activated carbon

 

 

DOI:10.1016/j.ijheatmasstransfer.2021.121480

(SJR 1,713; Q1,  Procentile 98(Fluid Flow and Transfer Processes)      95(Mechanical Engineering) 94(Condensed Matter Physics))

Accurate simulation and detailed description of the dynamics of the adsorption process play a significant role in forecasting the performance of new materials when used in various adsorption systems, like cooling/heating. The activated carbon (AC) consolidation allows improving the heat transfer rate inside the adsorption/desorption bed and compacting the systems. There are numerous mathematical models in literature for gas adsorption onto granular AC. But for consolidated AC, because of the absence of macropores, most assumptions that work well for granular AC may lead to significant discrepancies. Therefore, the present research proposes a new mathematical model for gas (CO2) adsorption onto consolidated adsorbent, a non-isothermal pore change model. The model takes into account the porosity and permeability changes due to the adsorption. The validation of the developed model is performed via comparison with the results obtained experimentally and numerically using an isothermal model. The effective Knudsen diffusion coefficient for the working pair is evaluated from porosity data. The rate of adsorption or mass transfer coefficient is estimated using the van't Hoff plot. The study results could be applied in the development of waste heat-driven cooling systems employing consolidated composite material as the adsorbent. The proposed mathematical model is also applicable for many other working pairs. © 2021 Elsevier Ltd

Berdenova, B., Pal, A., Saha, B.B., Kaltayev, A.,Non-isothermal pore change model predicting CO2 adsorption onto consolidated activated carbon

. //International Journal of Heat and Mass Transfer. – 2021. – Vol.177. – P.121480

DOI: 10.1016/j.ijheatmasstransfer.2021.121480

141.        

Multi-parametric dynamic analysis of a rolling bearings system

 

DOI:10.5545/sv-jme.2021.7178

(SJR 0,271; Q3,  Procentile 47(Mechanical Engineering)      42(Mechanics of Materials))

A method for calculating amplitudes and constructing frequency characteristics of forced and self-excited vibrations of a rotor-fluid-foundation system on rolling bearings with a non-linear characteristic based on the method of complex amplitudes and harmonic balance has been developed. Non-linear equations of motion of the rotor-fluid-foundation system are derived, and analytical methods of their solution are presented. Frequencies of fundamental and ultra-harmonic resonances are determined. The intervals between self-oscillation frequencies are estimated. The dependence of amplitudes on the amount of fluid in the rotor cavity, the mass of the foundation, linear imbalance, the value of the stiffness coefficient, and the damping coefficient is shown. © 2021 Journal of Mechanical Engineering.

Kydyrbekuly, A., Ibrayev, G.-G.A., Ospan, T., Nikonov, A.,Multi-parametric dynamic analysis of a rolling bearings system. //Strojniski Vestnik/Journal of Mechanical Engineering. – 2021. – Vol.67(9). – P.421-432

DOI: 10.5545/sv-jme.2021.7178

142.        

Modeling the Separation Process in Vertical Rotor Systems

 

DOI:10.1007/978-3-030-83594-1_11

(SJR 0,159; Q4,  Procentile 23(Mechanical Engineering)       18(Mechanics of Materials))

In this paper, we study and analyze the features of the separation process in a centrifugal force field, i.e. centrifugation process in vertical rotor systems. The main parameters that determine the time of separation of particles are revealed, and the optimal modes are indicated both from a constructive and from an economic point of view. Special cases of a fixed rotor are considered. Nonlinear differential equations of motion of a suspension particle are obtained, which do not have an exact solution. The study is carried out by analytical and numerical methods. The dependences of the slope angles of the tubes on the angular velocity of rotation of the rotor, sedimentation curves that allow one to estimate the time of deposition of particles, as well as the effect of the dispersed composition on the separation process as a whole, are obtained. The results of the study of this work allow us to determine with sufficient accuracy all the necessary characteristics working process of separation and sedimentation, and also allow in certain cases to exclude experimental work. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Kydyrbekuly, A.B., Ibrayev, G.E.,Modeling the Separation Process in Vertical Rotor Systems. //Mechanisms and Machine Science. – 2021. – Vol.85. – P.104-113

DOI: 10.1007/978-3-030-83594-1_11

143.        

Structural-parametric synthesis of the robomech class parallel mechanism with two sliders

 

 

DOI:10.3390/app11219831

(SJR 0,435; Q2,  Procentile 71(General Engineering)       62(Instrumentation) 59(Fluid Flow and Transfer Processes) 56(Computer Science Applications) 51(General Materials Science) 50(Process Chemistry and Technology))

This paper addresses the structural-parametric synthesis and kinematic analysis of the RoboMech class of parallel mechanisms (PM) having two sliders. The proposed methods allow the synthesis of a PM with its structure and geometric parameters of the links to obtain the given laws of motions of the input and output links (sliders). The paper outlines a possible application of the proposed approach to design a PM for a cold stamping technological line. The proposed PM is formed by connecting two sliders (input and output objects) using one passive and one negative closing kinematic chain (CKC). The passive CKC does not impose a geometric constraint on the movements of the sliders and the geometric parameters of its links are varied to satisfy the geometric constraint of the negative CKC. The negative CKC imposes one geometric constraint on the movements of the sliders and its geometric parameters are determined on the basis of the Chebyshev and least-square approximations. Problems of positions and analogues of velocities and accelerations of the considered PM are solved to demonstrate the feasibility and effectiveness of the proposed formulations and case of study. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Baigunchekov, Z., Laribi, M.A., Carbone, G.,Mustafa A.,Amanov, B., Zholdassov, Y.,Structural-parametric synthesis of the robomech class parallel mechanism with two sliders. //Applied Sciences (Switzerland). – 2021. – Vol.11(21). – P.9831

DOI: 10.3390/app11219831

144.        

Experimental investigation of an asphalt concrete deformation under cyclic loading

News of the National Academy of Sciences of the Republic of Kazakhstan

DOI:

(SJR 0,323; Q3,  Procentile  40(Geology)      37(Geotechnical Engineering and Engineering Geology) )

In the paper results of experimental investigation of an asphalt concrete deformation under cyclic loading on the scheme of direct tension are presented. Two series of the conventional hot dense asphalt concrete were tested. Durations of loading and rest periods were equal to 600 seconds. A stress has been applied to the tested sample quickly (within 1 second) and kept constant for the following 600 seconds. Then the stress was removed quickly and the sample was free of stress for the following 600 seconds. In the next cycle a stress greater than the preceding one was applied to the sample. In the first and second series 10 an 12 samples of the asphalt concrete were tested. In the first of them cyclic stresses were equal to 0.041; 0.111; 0.148; 0.183 and 0.219 MPa, in the second one stresses were equal to 0.744; 1.448; 2.232 and 2.976 MPa. Test temperature was 22-24°C. The tests were carried out in an equipment constructed especially. The sample strain was measured by means of two clock typed indicators and was recorded in a video camera. Results of the tests showed that in each cycle maximum creep strain of an asphalt concrete occurs in the end of loading period and maximum recovered strain occurs in the end of relax period. Both these strains increase with the growth of cycle number, but the increase rate of the first one is higher than of the second one. In the considered test conditions (durations of loading and relax periods equal to 600 seconds, values of applied stresses from 0.041 MPa till 3.0 MPa, temperature T=22-24°C) an asphalt concrete is a very plastic body: the total amount of plastic strain is equal to 80-87% from the strain achieved in the end of loading period in each cycle. © 2018, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved.

Iskakbayev, A., Teltayev, B.B., Rossi, C.O., Yensebayeva, G.M..,Experimental investigation of an asphalt concrete deformation under cyclic loading

News of the National Academy of Sciences of the Republic of Kazakhstan. //Series of Geology and Technical Sciences. – 2018. – Vol.2(428). – P.104-111

DOI:

145.        

A new simple damage accumulation model for predicting of an asphalt concrete cyclic strength

 

DOI:10.32014/2018.2518-170X.8

(SJR 0,323; Q3,  Procentile  40(Geology)      37(Geotechnical Engineering and Engineering Geology) )

Paper shows part of series test results for fine-grained dense asphalt concrete, prepared with the use of oxidated bitumen to failure at cyclic creep. Load and relax duration for each cycle were equal to 10 and 60 s respectively. Test temperature: 22 °C. It has been determined that creep strain under load and recovered strain at relax increase with the growth of cyclic number. The value of the recovered strain in the end of relax period decreases (from 52 to 20%) till half of the cyclic number to failure according to exponential dependence with the growth of cyclic number and further it remains constant till sample failure. Using the curve of asphalt concrete long-term strength, constructed according to the test results of more than 110 samples to failure under creep scheme at the stresses from 0.05 to 0.31 MPa, based on Bailey’s criterion, the expression was obtained for determination of cyclic strength for the asphalt concrete. © National Academy of Sciences of the Republic of Kazakhstan, 2018.

Iskakbayev, A.I., Teltayev, B.B., Oliviero Rossi, C., Estayev, K.,A new simple damage accumulation model for predicting of an asphalt concrete cyclic strength. //News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences. – 2018. – Vol.5(431). – P.38-47

DOI: 10.32014/2018.2518-170X.8

146.        

Computer modeling of creep for hereditary materials by abel’s kernel

 

DOI:10.32014/2018.2518-170X.36

(SJR 0,323; Q3,  Procentile  40(Geology)      37(Geotechnical Engineering and Engineering Geology) )

The work is devoted to the computer modeling of creep procedure for hereditary materials. Creep procedure is described by nonlinear integral equation of Yu. N. Rabotnov, and creep kernel is represented by Abel’s kernel. New efficient method has been proposed for determining of parameters (α, δ) for Abel’s kernel. Bisection method is used for obtaining of parameter α. Algorithm and relevant software have been developed for calculating of parameters α и δ. Efficient methods and relevant software have been developed for calculation of values of instantaneous strain and creep strain for hereditary materials. High accuracy of modeling of creep procedure has been shown by means of developed methods and software based on materials Nylon 6 and glass-reinforced plastic TC 8/3-250. © 2018, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved.

Iskakbayev, A.I., Teltayev, B.B., Yensebayeva, G.M., Kutimov, K.S.,Computer modeling of creep for hereditary materials by abel’s kernel

. //News of the National Academy of Sciences of the Republic of Kazakhstan

 Series of Geology and Technical Sciences. – 2018. – Vol.6(432). – P.66-76

DOI: 10.32014/2018.2518-170X.36

147.        

Determination of nonlinear creep parameters for hereditary materials

 

 

DOI:10.3390/app8050760

(SJR 0,435; Q2,  Procentile 71(General Engineering)       62(Instrumentation) 59(Fluid Flow and Transfer Processes) 56(Computer Science Applications) 51(General Materials Science) 50(Process Chemistry and Technology))

This work proposes an effective algorithm for description of nonlinear deformation of hereditary materials based on Rabotnov's method of isochronous creep curves. The notions have been introduced for experimental and model rheological parameters and similarity coefficients of isochronous curves. It has been shown how using them, one can find instantaneous strains at various stress levels for description of nonlinear deformation of hereditary materials at creep. Relevant equations have been determined from the nonlinear integral equation of Yu. N. Rabotnov for the application cases of Rabotnov's fractional exponential kernel and Abel's kernel for nonlinear deformation of hereditary materials at creep. The improved methods have been given for determination of creep parameters α, ε0, δ, β, and λ. By processing and using test results for material Nylon 6 and glass-reinforced plastic TC 8/3-250, the process has been shown for sequential implementation of the developed methods for description of linear and nonlinear deformation of these materials at creep. From the results of the experimental investigation performed by the authors of this paper, it has been determined that fine-grained, dense asphalt concrete at the temperature of 20 ± 2 °C and stresses up to 0.183 MPa at direct tension is deformed considerably in a nonlinear way. It has been shown in an illustrative way by construction of isochronous creep curves at various load durations and curves of experimental rheological parameter at various stresses. Nonlinear deformation of asphalt concrete at creep is adequately described by the proposed methods. © 2018 by the authors.

Iskakbayev, A., Teltayev, B., Rossi, C.O., Yensebayeva, G.,Determination of nonlinear creep parameters for hereditary materials. //Applied Sciences (Switzerland). – 2018. – Vol.8(5). – P.760

DOI: 10.3390/app8050760

148.        

Mechanical characteristics of asphalt concrete at different loading rates

 

 

DOI:10.32014/2019.2518-170X.156

(SJR 0,323; Q3,  Procentile  40(Geology)      37(Geotechnical Engineering and Engineering Geology) )

The results for experimental determination of characteristics have been given and analyzed in this article for deformation and failure of an asphalt concrete at two loading rates (0.058 and 0.652 MPa/s). Hot fine-grained dense asphalt concrete of type B prepared with viscous bitumen of grade BND 100/130 has been selected which is traditionally used in road construction. The tests have been performed at the temperature of 22-24°C in a specially invented and assembled device according to the scheme of direct tension. The asphalt concrete samples had a shape of rectangular beam with dimensions 5x5x15 cm. It is found that loading rate effects greatly the characteristics of deformation and failure of an asphalt concrete: failure time and specific work of deformation are decreased in 8 times approximately, failure strain is decreased in 1.5 times and as much as that the strength is increased (failure at tension) at the loading rate increase in 11 times from 0.058 MPa to 0.652 MPa/s. From the moment of loading to the moment of failure the asphalt concrete is deformed nonlinearly. The rate of nonlinearity is increased with the load increase. © 2019, National Academy of Sciences of the Republic of Kazakhstan. All rights reserved.

Iskakbayev, A.I., Teltayev, B.B., Yensebayeva, G.M.,Mechanical characteristics of asphalt concrete at different loading rates. //News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences. – 2019. – Vol.6(438). – P.64-69

DOI: 10.32014/2019.2518-170X.156

 

149.        

Impact of loading rate on asphalt concrete deformation and failure
 
 

DOI:10.18720/MCE.100.8

(SJR 0,4; Q3,  Procentile  81(Building and Construction)   79(Civil and Structural Engineering) )

The results for experimental determination of characteristics have been given and analyzed in this article for deformation and failure of an asphalt concrete at eleven loading rates from 0.000563 MPa/s to 0.652 MPa/s differing in 1158 times. A hot fine-grained dense asphalt concrete of type B prepared with a viscous bitumen of grade BND 100/130 which is traditionally used in road construction has been selected for the research. The tests have been performed at the temperature of 22–24 °C in a specially invented and assembled device according to the scheme of direct tension. The asphalt concrete samples had a shape of rectangular beam with dimensions 5×5×15 cm. It is found that from the moment of loading to the moment of failure the asphalt concrete is deformed nonlinearly. The rate of nonlinearity is increased with the load increase. Loading rate effects greatly the characteristics of deformation and failure of the asphalt concrete: failure time, specific work of deformation and failure deformation are decreased in 242, 160 and 3 times respectively at the loading rate increase in 1158 (nearly 1200) times from 0.000563 MPa/s to 0.652 MPa/s and the strength is increased in 5 times. Dependences for characteristics of the asphalt concrete failure (failure time, failure deformation, specific work of deformation and strength) on a loading rate are described with a high accuracy by power functions. © Iskakbayev, A.,Teltayev, B.B.,Rossi, C.O.,Yensebayeva, G.,Abu, B., Kutimov, K.S., 2020.

Iskakbayev, A., Teltayev, B., Rossi, C.O., Yensebayeva, G.Abu B.,Kutimov K.,,Impact of loading rate on asphalt concrete deformation and failure. //Magazine of Civil Engineering. – 2020. – Vol.100(8). – P.10008

DOI: 10.18720/MCE.100.8

150.        

Modeling of hereditary materials relaxation by Abel Kernel
 
 

DOI:10.32014/2020.2518-170X.154

(SJR 0,323; Q3,  Procentile  40(Geology)      37(Geotechnical Engineering and Engineering Geology) )

 

Zhurinov, M.Zh., Iskakbayev, A.I., Teltayev, B.B., Kutimov, K.S.,Modeling of hereditary materials relaxation by Abel Kernel. //News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences. – 2020. – Vol.6(444). – P.254-260

DOI: 10.32014/2020.2518-170X.154

151.        

Long-term strength of asphalt concrete and its applications
 
2020, 244, 118325
 

DOI:10.1016/j.conbuildmat.2020.118325

(SJR 1,662; Q1,  Procentile  95(Civil and Structural Engineering)      94(Geotechnical Engineering and Engineering GeologyBuilding and Construction) 87(General Materials Science) )

An international journal dedicated to the investigation and innovative use of materials in construction and repair. Construction and Building Materials provides an international forum for the dissemination of innovative and original research and development in the field of construction and building materials and their application in new works and repair practice. The journal publishes a wide range of innovative research and application papers which describe laboratory and to a limited extent numerical investigations or report on full scale projects. Multi-part papers are discouraged. Construction and Building Materials also publishes detailed case studies and some incisive review articles that contribute new understandings. We are focusing on construction materials papers and we exclude papers on structural engineering, geotechnics and unbound highway layers. The construction materials and technology covered include: cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibres, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials and railway material applications. The scope of Construction and Building Materials includes, but is not restricted to, materials, NDT and monitoring aspects of new works and repair and maintenance of the following: bridges, high-rise buildings, dams, civil engineering structures, silos, highway pavements, tunnels, water containment structures, sewers, roofing, housing, coastal defences and railways.

Iskakbayev, A.I., Teltayev, B.B., Yestayev, K.Z., Abu, B.D.,Long-term strength of asphalt concrete and its applications. //Construction and Building Materials. – 2020. – Vol.244. – P.118325

DOI: 10.1016/j.conbuildmat.2020.118325

152.        

Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part A: Modeling and modifications)
 

DOI:10.1016/j.rser.2017.08.022

(SJR 3,522; Q1,  Procentile  97(Renewable Energy, Sustainability and the Environment) )

This paper presents a comprehensive review on research and developments on solar assisted compression heat pump systems, mostly reported during the last two decades. The first part of this paper provides a detailed description of the past efforts on various system configurations, system modeling, enhancement of system performance, modifications in compression heat pump cycles and environment friendly refrigerant options for solar assisted compression heat pump systems. The economical and environmental impacts of solar assisted compression heat pump systems are also described. Further research needs in this important field of solar assisted compression heat pump are listed. The outcomes of this review confirm that, there is a lot of research scope for improving the performance of the system and reducing its initial cost to make it competitive in the global market. The information presented in this paper is shall be highly beneficial for the active researchers working presently on solar assisted compression heat pumps. © 2017

Mohanraj, M., Belyayev, Y., Jayaraj, S., Kaltayev, A.,Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part A: Modeling and modifications). //Renewable and Sustainable Energy Reviews,. – 2018. – Vol.83. – P.90-123

DOI: 10.1016/j.rser.2017.08.022

153.        

Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part-B: Applications)
 

DOI:10.1016/j.rser.2017.08.086

(SJR 3,522; Q1,  Procentile  97(Renewable Energy, Sustainability and the Environment))

The second part of this review presents a comprehensive review on applications of solar assisted compression heat pump systems and its associated research potentials. The reported investigations on solar assisted heat pumps are categorized into five major groups as follows: (a) drying, (b) room space heating; (c) agricultural green house space heating, (d) water heating and (e) desalination applications. Most of the reported investigations in open literature are reviewed. The study will then presents the major limitations of solar assisted compression heat pumps and further research tasks in various applications. This paper concludes that solar assisted compression heat pump system is the promising equipment used for heating applications. The information presented in the second part of the review is beneficial to the researchers, energy experts and decision makers in the field. © 2017 Elsevier Ltd

Mohanraj, M., Belyayev, Y., Jayaraj, S., Kaltayev, A.,Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part-B: Applications). //Renewable and Sustainable Energy Reviews. – 2018. – Vol.83. – P.124-155

DOI: 10.1016/j.rser.2017.08.086

154.        

Quantitative model of the formation mechanism of the rollfront uranium deposits
 
 

DOI:10.18321/ectj724

(SJR 0,181; Q3,  Procentile  35(General Chemical Engineering)      34(General Chemistry) 29(General Materials Science) 23(Condensed Matter Physics) )

The rollfront type deposits are crescent shaped accumulation of mineralization including uranium, selenium, molybdenum in reduced permeable sandstones. It generally forms within a geochemical barrier between mostly reduced and predominantly oxidized environments. Redox reactions between oxidant and reductant creates favorable conditions for uranium precipitation, while constant flow of oxidant continuously dissolves uranium minerals thereby creating a reactive transport. Several previous works had either focused on the characteristics of the rollfront type deposits, or on the description of chemical and geological processes involved in their genesis. Based on these previous works, authors aimed to mimic laboratory experiments numerically by reactive flow and numerical simulation. Data from one particular experiment was used to determine reaction rates between reactants to produce a model of reactive transport and chemical processes involved in the formation of rollfront type deposits. The resulting model was used to identify the causes of crescent like formations and to determine main mechanisms influencing rollfront evolution. A better understanding and simulation of the mechanism involved in the formation of rollfront type deposits and their properties would contribute to decreased exploration and production costs of commodities trapped within such accumulations. The results of this work can be used to model other deposits formed through infiltration and subsequent precipitation of various minerals at the redox interface. © 2018 Al-Farabi Kazakh National University.

Aizhulov, D.Y., Shayakhmetov, N.M., Kaltayev, A.,Quantitative model of the formation mechanism of the rollfront uranium deposits. //Eurasian Chemico-Technological Journal. – 2018. – Vol.20(3). – P.213-221

DOI: 10.18321/ectj724

155.        

A novel hybrid approach for in-situ determining the thermal properties of subsurface layers around borehole heat exchanger
 
 

DOI: 10.1016/j.ijheatmasstransfer.2018.05.107

(SJR 1,624; Q1,  Procentile  98(Fluid Flow and Transfer Processes)      95(Mechanical Engineering) 94(Condensed Matter Physics) )

Performance of shallow geothermal systems such as borehole thermal energy storage (BTES) and ground source heat pump (GSHP) mainly depends on the thermal properties of the subsurface and proper design of borehole heat exchangers (BHE). This paper introduces a novel hybrid approach for measuring the effectiveness of BHEs and surrounding subsurface thermal properties, which combines traditional thermal response test (TRT) with the borehole temperature relaxation method (BTR), based on two dimensional radial conductive heat transfer. The new method allows for: (1) evaluation of how convective heat loss at groundwater layers influence estimation of subsurface thermal properties; (2) examination of non-uniform heat transfer through a BHE to stratified subsurface layers; and, (3) calculation of depth-dependency of thermal properties of unsaturated subsurface layers. The hybrid approach was tested using a 50 m U-type BHE, the results of which indicated that convective heat transfer at the groundwater level altered the real value of effective thermal conductivity from 0.45 to 1.56 W/m K. The non-uniformity of heat transfer along the BHE was confirmed by calculations that showed subsurface thermal conductivities were depth dependent, varying between 0.34 and 0.61 W/m K. © 2018 Elsevier Ltd

Akhmetov, B., Georgiev, A., Popov, R.,Turtaeva Z,.Kaltayev, A., Ding, Y,A novel hybrid approach for in-situ determining the thermal properties of subsurface layers around borehole heat exchanger. //International Journal of Heat and Mass Transfer. – 2018. – Vol.126. – P.1138-1149

DOI: 10.1016/j.ijheatmasstransfer.2018.05.107

156.        

A comprehensive study to evaluate absolute uptake of carbon dioxide adsorption onto composite adsorbent | Une étude complète visant à mesurer l'absorption absolue de dioxyde de carbone sur un adsorbant composite
 
 

DOI:10.1016/j.ijrefrig.2019.01.014

(SJR 1,543; Q1,  Procentile  90(Building and Construction)      88(Mechanical Engineering))

In this study, new composite adsorbent with enhanced thermal conductivity and adsorption capacity was synthesized and analyzed comprehensively for the development of compact CO 2 based adsorption cooling system. The consolidated composite was prepared employing activated carbon, graphene nanoplatelets and hydroxyl cellulose as a parent adsorbent, thermal conductivity enhancer, and binder, respectively. The surface area and pore volume of the composite were found to be 1778 ± 13 m 2 g −1 and 1.014 cm 3 g −1 , respectively. In addition, the composite showed 233% higher thermal conductivity compared to the parent activated carbon. Adsorption characteristics of CO 2 were measured at temperature ranging from 20 to 70 °C and pressures up to 5 MPa. Absolute uptake was evaluated from excess adsorption based on the following two methods: (i) the adsorbed phase volume is equal to the pore volume of the adsorbent; and (ii) the adsorbed phase volume is almost zero under low pressure and/or high temperature conditions. Furthermore, the averaging of above two methods was also taken for avoiding these two extreme assumptions. Obtained absolute adsorption uptake data were fitted with modified Dubinin-Astakhov and Tóth models. Results indicated good approximation between data points and models. The average isosteric heats of adsorption estimated using modified D-A and Tóth model were found to be 19.742 kJ mol −1 and 19.023 kJ mol −1 , respectively. The obtained characteristics of composite adsorbent are prerequisites for designing compact CO 2 based adsorption cooling systems. © 2019 Elsevier Ltd and IIR

Berdenova, B., Pal, A., Muttakin, M.,Mitra S.,Thu K.,Saha, B.B., Kaltayev, ,A comprehensive study to evaluate absolute uptake of carbon dioxide adsorption onto composite adsorbent. //International Journal of Refrigeration. – 2019. – Vol.100. – P.131-140

DOI: 10.1016/j.ijrefrig.2019.01.014

157.        

Thermal Performance Simulation of a Heat Pump Assisted Solar Desalination System for Kazakhstan Climatic Conditions
 

DOI:10.1080/01457632.2018.1451246

(SJR 0.818; Q2,  Procentile  68(Fluid Flow and Transfer Processes)   67(Fluid Flow and Transfer Processes) 58(Condensed Matter Physics) )

A numerical model has been proposed in this research work for predicting the energy performance of a heat pump assisted regenerative solar still using phase change heat storage materials such as paraffin wax and hydrate salt. The numerical model is based on energy and mass balance. The performance was simulated for Fort Sherchenko town in Kazakhstan. The performance comparison between the conventional solar still and heat pump assisted regenerative solar still with and without phase change materials are presented. Moreover, the influence of two different phase change materials on thermal performance of a heat pump assisted regenerative solar still are described. The numerical simulation results showed that heat pump assisted regenerative solar still is more energy efficient and produces better productivity when compared to the conventional simple solar still. The use of hydrate salt phase change heat storage material was found to be a good option for enhancing the performance of a heat pump assisted regenerative solar still. © 2018, © 2018 Taylor & Francis Group, LLC.

Belyayev, Y., Mohanraj, M., Jayaraj, S., Kaltayev, A.,Thermal Performance Simulation of a Heat Pump Assisted Solar Desalination System for Kazakhstan Climatic Conditions. //Heat Transfer Engineering. – 2019. – Vol.40(12). – P.1060-1072

DOI: 10.1080/01457632.2018.1451246

158.        

Numerical simulation of a heat pump assisted solar dryer for continental climates
 
 

DOI: 10.1016/j.renene.2019.04.119

(SJR 2,052; Q1,  Procentile  88(Renewable Energy, Sustainability and the Environment))

A numerical model has been proposed in this work for predicting the energy performance of a heat pump assisted solar dryer under continental climates. The model is based on energy and mass balance. The energy performance comparison between heat pump dryer, solar dryer and heat pump assisted solar dryer are presented. The simulation was performed for four different climatic conditions of Almaty city in Kazakhstan. The simulation results showed that, the heat pump assisted solar dryer is more energy efficient when compared to the conventional solar dryers. It is also confirmed that, the conventional solar dryers are not suitable for continental climatic conditions having low ambient temperatures. The heat pump dryer reduces the initial moisture content of banana (on wet basis) from about 74% to the final moisture content (on wet basis) of about 19% in 21 h. Similarly, the solar dryer reduces the initial moisture content (wet basis) from about 74% to the final moisture content (wet basis) of about 20% in 35 h. The specific moisture extraction rate and coefficient of performance of a heat pump assisted solar dryer are estimated to be about 0.6 kg/kWh and 2.72, respectively. © 2019 Elsevier Ltd

Kuan M.,Shakir Y.,Mohanraj M.,Belyayev Y.

Jayaraj S.,Kaltayev A.,