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Genre:Естественные науки (natural_sciences)
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191-200 of 223
periodical press (Magazines)
VALIYEV A. A.
Valiyev, A. A. Spectrum and resolvent of multi-channel systems with internal energies and common boundary conditions [Text] / A. A. Valiyev, M. B. Valiyev , E. H. Huseynov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2025. - № 3 (115). - P. 150-157. - Bibliogr.: p. 157 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In the article the spectrum and resolvent of the so-called multichannel systems with nonzero internal energies were investigated
Keywords
eigenvalues, edge problem, Wronskian, transformation operator, asymptotics, continuous spectrum, resolvent, multi-channel systems, internal energy, quantum physics
Kazakhstan
0/0 Free
periodical press (Magazines)
ABIEV N. A.
Abiev, N. A. Structural properties of the sets of positively curved Riemannian metrics on generalized Wallach spaces [Text] / N. A. Abiev // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 4-17. - Bibliogr.: p. 16-17 ISSN 2518-7929.
UDC:
512
Subject headings
- Algebra
Annotation
In the present paper sets related to invariant Riemannian metrics of positive sectional and (or) Ricci curvature on generalized Wallach spaces are considered
Keywords
generalized Wallach space, Riemannian metric, Kähler metric, normalized Ricci flow, sectional curvature, Ricci curvature, dynamical system, singular point
Kazakhstan
0/0 Free
periodical press (Magazines)
BOBODZHANOVA M. A.
Bobodzhanova, M. A. Singularly perturbed integro-differential equations with degenerate Hammerstein’s kernel [Text] / M. A. Bobodzhanova, B. T. Kalimbetov , V. F. Safonov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 57-68. - Bibliogr.: p. 66-68 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations. Integral equations
Annotation
Singularly perturbed integro-differential equations with degenerate kernels are considered
Keywords
singularly perturbed, Hammerstein’s equation, degenerate kernel, Fredholm’s equations, analytic function, Laurent’s series, passage to the limit, the Maple program
Kazakhstan
0/0 Free
periodical press (Magazines)
SALIM S. H.
Salim, S. H. Solving Volterra-Fredholm integral equations by non-polynomial spline functions [Text] / S. H. Salim, K. H. F. Jwamer , R. K. Saeed // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 170-184. - Bibliogr.: p. 183-184 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations. Integral equations
Annotation
In this paper a novel non-polynomial spline function to obtain the numerical solution of equation (1) for the first time
Keywords
Volterra integral equation, Fredholm integral equation, non-polynomial spline function, integral equations, linear equations
Kazakhstan
0/0 Free
periodical press (Magazines)
NIKIFOROV S. V.
Nikiforov, S. V. Synthesis, luminescent and dosimetric properties of ultrafine oxide ceramics for high-dose dosimetry of ionizing radiation [Text] / S. V. Nikiforov, D. V. Ananchenko , T. V. Shtang [et al.] // Қарағанды университетінің хабаршысы. Физика сериясы. - 2024. - № 4 (116). - P. 83-91. - Bibliogr.: p. 88-89 ISSN 2518-7198.
UDC:
535.377
Subject headings
- Thermoluminescence
Annotation
Thermoluminescent and dosimetric properties of ultrafine alumina and zirconia ceramics exposed to high-dose pulsed electron beam (130 keV, 1.5 kGy per one pulse) were studied
Keywords
aluminum oxide, zirconium oxide, ultrafine ceramics, thermoluminescence, electron-beam synthesis, crystallite size, dose characteristics, fading, термолюминесценция
Kazakhstan
0/0 Free
periodical press (Magazines)
POLESHCHUK O. KH.
Poleshchuk, O. Kh. Study of the mechanism of the reaction of triazolide’s formation of using the density functional theory [Text] / O. Kh. Poleshchuk, A. G. Yarkova , G. M. Adyrbekova [et al.] // Қазақстан Республикасы Ұлттық ғылым академиясының баяндамалары. - 2017. - № 1. - P. 11-18. - Bibliogr.: p. 17-18 ISSN 2224-5227.
UDC:
530.145
Subject headings
- Quantum theory. Quantum mechanics
Annotation
The thermodynamic parameters of the amination reaction in the gas phase and in solution were analyzed using density functional theory (DFT) with the full electronic basis set 6-31G(d)
Keywords
the theory of functional density, B3LYP/6-31G (d), naphthoquinones, the mechanism of the reaction, тығыздықтың функционал теориясы, теория функционала плотности
Kazakhstan
0/0 Free
periodical press (Magazines)
KURALBAYEV Z. K.
Kuralbayev, Z. K. Solution of the problem of lowering of materials of viscous layer down the hillslope [Text] / Z. K. Kuralbayev // Қазақстан Республикасы Ұлттық ғылым академиясының баяндамалары. - 2018. - № 2. - P. 36-42. - Bibliogr.: p. 41-42 ISSN 2224-5227.
UDC:
552.5:51
Subject headings
- Sedimentary rocks. Mathematics
Annotation
The article deals with the problem of a modeling investigation of the mechanism of the landslides origin of sedimentary rocks
Keywords
sedimentary rocks, numerical experiment, mathematical model, solution algorithm, rheological properties, осадочные породы, шөгінді тау жыныстары
Kazakhstan
0/0 Free
periodical press (Magazines)
MUSTAFIN K. G.
Mustafin, K. G. Screening of L. edodes strain producing biomass with high content of polysaccharides [Text] / K. G. Mustafin, N. A. Bisko , Zh. B. Narmuratova [et al.] // Қазақстан Республикасы Ұлттық ғылым академиясының баяндамалары. - 2018. - № 4. - P. 22-26. - Bibliogr.: p. 24-25 ISSN 2224-5227.
UDC:
582.28
Subject headings
- Fungi
Annotation
In this article Lentinus edodes strain, producing a significant amount of endo-polysaccharides was selected during submerged cultivation
Keywords
basidiomycetes, Lentinus edodes, endo-polysaccharides, submerged cultivation, базидиомицеттер, эндополисахаридтер, базидиомицеты, эндополисахариды
Kazakhstan
0/0 Free
abstract
АБДУЛЛАЕВА, ГЮЛЬНАРА НАИЛЬ КЫЗЫ
Синтез и изучение свойств комплексов переходных металлов с нефтяными порфиринами и их аддуктов с молекулярным кислородом : автореф. дис. ... д-ра философии по хим. наукам : 02.00.01 / Абдуллаева, Гюльнара Наиль кызы ... – Баку : [Б. и.], 2012. - 25, [1] c. . – Библиогр.: с. 19-22 . – 100 экз. – не указан : [Б. ц.]
UDC:
546(043)
Shelf code:
А 2013/6610
Subject headings
- Неорганическая химия
Annotation
Целью работы является изучение свойств комплексов переходных металлов с нефтяными порфиринами и их аддуктов с молекулярным кислородом
Keywords
неорганическая химия, нефтяные порфирины, комплекс переходных металлов
1/1 Free
abstract
UKHMAN, ALEXANDR VASIL`EVICH`
s- numbers and a spectrum of integral operators : extended abstract concerning this dissertation for submission for the academic degree of doctor of philosophy / Ukhman, Alexandr Vasil`evich` ... – Astana : [N. p.], 2010. - 20 p. . – Bibliogr.: p. 15-16, p. 18 . – 100 c. – не указан : [N. p.]
UDC:
517.968
Shelf code:
А 2010/4460
Subject headings
- Integral equations
Annotation
The purpose of the research thesis is the theory of s-numbers of linear bounded integral operators
Keywords
integral equations, dissertation, spectrum of integral operators, s-numbers, mathematics, abstract
2/2 Free
VALIYEV A. A.
SPECTRUM AND RESOLVENT OF MULTI-CHANNEL SYSTEMS WITH INTERNAL ENERGIES AND COMMON BOUNDARY CONDITIONS
periodical press (Magazines)
0/0 Free
ABIEV N. A.
STRUCTURAL PROPERTIES OF THE SETS OF POSITIVELY CURVED RIEMANNIAN METRICS ON GENERALIZED WALLACH SPACES
periodical press (Magazines)
0/0 Free
BOBODZHANOVA M. A.
SINGULARLY PERTURBED INTEGRO-DIFFERENTIAL EQUATIONS WITH DEGENERATE HAMMERSTEIN’S KERNEL
periodical press (Magazines)
0/0 Free
SALIM S. H.
SOLVING VOLTERRA-FREDHOLM INTEGRAL EQUATIONS BY NON-POLYNOMIAL SPLINE FUNCTIONS
periodical press (Magazines)
0/0 Free
NIKIFOROV S. V.
SYNTHESIS, LUMINESCENT AND DOSIMETRIC PROPERTIES OF ULTRAFINE OXIDE CERAMICS FOR HIGH-DOSE DOSIMETRY OF IONIZING RADIATION
periodical press (Magazines)
0/0 Free
POLESHCHUK O. KH.
STUDY OF THE MECHANISM OF THE REACTION OF TRIAZOLIDE’S FORMATION OF USING THE DENSITY FUNCTIONAL THEORY
periodical press (Magazines)
0/0 Free
KURALBAYEV Z. K.
SOLUTION OF THE PROBLEM OF LOWERING OF MATERIALS OF VISCOUS LAYER DOWN THE HILLSLOPE
periodical press (Magazines)
0/0 Free
MUSTAFIN K. G.
SCREENING OF L. EDODES STRAIN PRODUCING BIOMASS WITH HIGH CONTENT OF POLYSACCHARIDES
periodical press (Magazines)
0/0 Free
АБДУЛЛАЕВА, ГЮЛЬНАРА НАИЛЬ КЫЗЫ
СИНТЕЗ И ИЗУЧЕНИЕ СВОЙСТВ КОМПЛЕКСОВ ПЕРЕХОДНЫХ МЕТАЛЛОВ С НЕФТЯНЫМИ ПОРФИРИНАМИ И ИХ АДДУКТОВ С МОЛЕКУЛЯРНЫМ КИСЛОРОДОМ (2012)
abstract
1/1 Free
UKHMAN, ALEXANDR VASIL`EVICH`
S- NUMBERS AND A SPECTRUM OF INTEGRAL OPERATORS (2010)
abstract
2/2 Free