Electronic catalog
Genre:Естественные науки (natural_sciences)
catalogue:Articles
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4001-4010 of 4391
periodical press (Magazines)
MUKUSHEVA G. K.
Mukusheva, G. K. Sorption materials based on zeolite and chitosane for the discharge of ions of toxic metals [Text] / G. K. Mukusheva, A. Zh. Ondashova // Қазақстан Республикасы Ұлттық ғылым академиясының баяндамалары. - 2018. - № 2. - P. 131-134. - Bibliogr.: p. 129 ISSN 2224-5227.
UDC:
544.723:549.25
Subject headings
- Adsorption. Heavy metals
Annotation
In this article, the influence of various factors on the sorption of Cu²⁺ and Pb²⁺ ions is examined, and the optimal sorption parameters are established, including a sorbent mass of 1 g per 100 cm³ of solution for both copper and lead at T = 298 K
Keywords
sorption, heavy metals, zeolite, chitosan, Cr (VI), Cu (II), Pb (II), сорбция, цеолит, хитозан
Kazakhstan
0/0 Free
periodical press (Magazines)
ISMOILOV M. B.
Ismoilov, M. B. Hessian measures in the class of m-convex (m−cv) functions [Text] / M. B. Ismoilov, R. A. Sharipov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 93-100. - Bibliogr.: p. 99-100 ISSN 2518-7929.
UDC:
517.518.244
Subject headings
- Convex functions
Annotation
In this work, a number of important properties of the class of m−cv functions are showed, in particular, Hessians Hk( u), k= 1,2, ..., n−m+ 1, in the class of bounded m−cv functions are studied
Keywords
m-convex function, strongly m-subharmonic function, Borel measures, hessians, differential equations
Kazakhstan
0/0 Free
periodical press (Magazines)
KERIMBEKOV A.
Kerimbekov, A. Synthesis of uniformly distributed optimal control with nonlinear optimization of oscillatory processes [Text] / A. Kerimbekov, Zh. K. Asanova , A. K. Baetov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 101-111. - Bibliogr.: p. 110-111 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In the article, the problem of synthesizing uniformly distributed optimal control for nonlinear optimization of oscillatory processes described by integro-differential partial differential equations with the Volterra integral operator was explored
Keywords
Volterra operator, nonlinear optimization, Bellman functional, Frechet differential, Bellman type equations, synthesis of optimal control
Kazakhstan
0/0 Free
periodical press (Magazines)
ASHYRALYEV A.
Ashyralyev, A. Absolutely stable difference scheme for the delay partial differential equation with involution and Robin boundary condition [Text] / A. Ashyralyev, S. Ibrahim , E. Hincal // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 55-65. - Bibliogr.: p. 64-65 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
This paper examines the initial value problem for a third-order delay partial differential equation with involution and Robin boundary condition
Keywords
numerical algorithm, involution, Robin boundary condition, third order partial differentiale quations, delay
Kazakhstan
0/0 Free
periodical press (Magazines)
AISAGALIEV S.
Aisagaliev, S. Controllability and optimal fast operation of nonlinear systems [Text] / S. Aisagaliev, G. Korpebay // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 77-92. - Bibliogr.: p. 91-92 ISSN 2518-7929.
UDC:
517.957
Subject headings
- Nonlinear equations and systems
Annotation
A new method for solving the problem of controllability and optimal transient behavior of nonlinear systems subject to boundary conditions and constraints on control values was proposed
Keywords
optimal performance, integrity constraints, functional gradient, integral equation, nonlinear systems
Kazakhstan
0/0 Free
periodical press (Magazines)
ASHYRALIYEV M.
Ashyraliyev, M. A stable difference scheme for the solution of a source identification problem for telegraph-parabolic equations [Text] / M. Ashyraliyev, M. A. Ashyralyyeva // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 46-54. - Bibliogr.: p. 52-53 ISSN 2518-7929.
UDC:
517.956.4
Subject headings
- Parabolic equations and systems
Annotation
In the present paper, a first order of accuracy difference scheme for the approximate solution of the inverse problem for telegraph-parabolic equations with an unknown spacewise dependent source term is constructed
Keywords
Difference scheme, source identification problem, telegraph-parabolic equation, stability estimates, differential equations
Kazakhstan
0/0 Free
periodical press (Magazines)
NAURYZBAYEV B. A.
Nauryzbayev, B. A. Improving mathematical problem-sol ving skills with an intelligent self-learning system : a randomized controlled trial study [Text] / B. A. Nauryzbayev, Zh. Zh. Akhmetova , N. I. Pak [and others] // Алматы энергетика және байланыс университетінің хабаршысы. - 2023. - № 3. - 67-77 р.. - Bibliogr.: 76 p.
ISSN 2790-0886.
UDC:
519.85
Subject headings
- Mathematical programming
Annotation
The article discusses an intelligent self-learning system for analyzing the learning process of solving mathematical problems
Keywords
Ml.net, artificial intelligence, artificial intelligence methods, neural networks, solving mathematical problems, machine learning, mathematics and artificial intelligence, mathematical programming
Kazakhstan
0/0 Free
periodical press (Magazines)
ASHUROV R. R.
Ashurov, R. R. On a non-local problem for a fractional differential equation of the Boussinesq type [Text] / R. R. Ashurov, Yu. E. Fayziev , M. U. Khudoykulova // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 34-45. - Bibliogr.: p. 44-45 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In this paper, a non-local problem for the Boussinesq type equation Dαtu(t) +ADαtu(t) +ν2Au(t) = 0,0< t < T,1< α <3/2 is studied, where Dαt is the Caputo fractional derivative, and A is an abstract operator
Keywords
fractional equation, Caputo derivative, forward and inverse problems, Fourier method, Boussinesq type
Kazakhstan
0/0 Free
periodical press (Magazines)
KUTLAY H.
Kutlay, H. Existence of extremal solutions for a class of fractional integro-differential equations [Text] / H. Kutlay, A. Yakar // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 112-125. - Bibliogr.: p. 124-125 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In the study, the existence of solutions of a class of fractional integro-differential equations with boundary conditions was considered
Keywords
Caputo derivative, integro-differential equation, Riemann-Liouville integral, extremal solutions, monotone iterative technique, upper and lower solutions
Kazakhstan
0/0 Free
periodical press (Magazines)
OLĞAR H.
Olğar, H. Operator-pencil treatment of multi-interval Sturm-Liouville equation with boundary-transmission conditions [Text] / H. Olğar, F. Muhtarov , O. Mukhtarov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 126-136. - Bibliogr.: p. 134-135 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations. Integral equations
Annotation
This paper is devoted to a new type of boundary-value problems for Sturm-Liouville equations defined on three disjoint intervals (−π, −π+d),(−π+d, π−d), and (π−d, π) together with eigenparameter dependent boundary conditions and with additional transmission conditions specified at the common end points −π+d and π−d, where 0< d < π
Keywords
boundary-value-transmission problems, eigenvalues, generalized eigenfunctions, lower boundestimation, Rayleigh’s method, transmission conditions
Kazakhstan
0/0 Free
MUKUSHEVA G. K.
SORPTION MATERIALS BASED ON ZEOLITE AND CHITOSANE FOR THE DISCHARGE OF IONS OF TOXIC METALS
periodical press (Magazines)
0/0 Free
periodical press (Magazines)
0/0 Free
KERIMBEKOV A.
SYNTHESIS OF UNIFORMLY DISTRIBUTED OPTIMAL CONTROL WITH NONLINEAR OPTIMIZATION OF OSCILLATORY PROCESSES
periodical press (Magazines)
0/0 Free
ASHYRALYEV A.
ABSOLUTELY STABLE DIFFERENCE SCHEME FOR THE DELAY PARTIAL DIFFERENTIAL EQUATION WITH INVOLUTION AND ROBIN BOUNDARY CONDITION
periodical press (Magazines)
0/0 Free
AISAGALIEV S.
CONTROLLABILITY AND OPTIMAL FAST OPERATION OF NONLINEAR SYSTEMS
periodical press (Magazines)
0/0 Free
ASHYRALIYEV M.
A STABLE DIFFERENCE SCHEME FOR THE SOLUTION OF A SOURCE IDENTIFICATION PROBLEM FOR TELEGRAPH-PARABOLIC EQUATIONS
periodical press (Magazines)
0/0 Free
NAURYZBAYEV B. A.
IMPROVING MATHEMATICAL PROBLEM-SOL VING SKILLS WITH AN INTELLIGENT SELF-LEARNING SYSTEM : A RANDOMIZED CONTROLLED TRIAL STUDY
periodical press (Magazines)
0/0 Free
ASHUROV R. R.
ON A NON-LOCAL PROBLEM FOR A FRACTIONAL DIFFERENTIAL EQUATION OF THE BOUSSINESQ TYPE
periodical press (Magazines)
0/0 Free
KUTLAY H.
EXISTENCE OF EXTREMAL SOLUTIONS FOR A CLASS OF FRACTIONAL INTEGRO-DIFFERENTIAL EQUATIONS
periodical press (Magazines)
0/0 Free
OLĞAR H.
OPERATOR-PENCIL TREATMENT OF MULTI-INTERVAL STURM-LIOUVILLE EQUATION WITH BOUNDARY-TRANSMISSION CONDITIONS
periodical press (Magazines)
0/0 Free