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Genre:Естественные науки (natural_sciences)
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181-190 of 231
periodical press (Magazines)
TASKIN A.
Taskin, A. Source identification problems for the neutron transport equations [Text] / A. Taskin // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 137-149. - Bibliogr.: p. 147-149 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In this study, the time-dependent source identification problem for the two-dimensional neutron transport equation was studied
Keywords
identification problem, neutron transport equation, difference scheme, differential equation, stability inequality
Kazakhstan
0/0 Free
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)
AMIROV B. M.
Amirov, B. M. Screening of onion breeding selections for storing ability
[Text] / B. M. Amirov, Zh. S. Amirova , U. A. Manabayeva [and others] // ПМУ хабаршысы. Химия-биологиялық серия. - 2014. - № 1. - Р. 66-71. - Bibliogr.: 70 р. ISSN 1811-184Х.
UDC:
635.25
Subject headings
- Onion. Allium cepa L.
Annotation
The article presents an experimental study of onions for their storage capacity
Keywords
onion, onion storage, experimental study of onions, onion breeding
Kazakhstan
0/0 Free
periodical press (Magazines)
AMIROV B. M.
Amirov, B. M. Screening of onion breeding selections for storing ability
[Text] / B. M. Amirov, Zh. S. Amirova , U. A. Manabaeva [and others] // ПМУ хабаршысы. Химия-биологиялық серия. - 2014. - № 4. - Р. 44-49. ISSN 1811-184Х.
UDC:
635.25
Subject headings
- Onion. Allium cepa L.
Annotation
The article examines the result of the selection of a breeding onion for its storage capacity
Keywords
onion breeding, onion, onion storage, breeding onions, storability
Kazakhstan
0/0 Free
periodical press (Magazines)
VDOVINA T. A.
Vdovina, T. A. State of coenopopulations of wild berry plants in the territory of Kazakhstan Altai [Text] / T. A. Vdovina, O. A. Lagus , E. A. Isakova [et al.] // Қарағанды университетінің хабаршысы. Биология. Медицина. География сериясы. - 2024. - № 4 (116). - P. 129-134. - Bibliogr.: p. 133 ISSN 2518-7201.
UDC:
581.1:574.3
Subject headings
- Plant physiology. Population
Annotation
This article presents studies on the state of the coenopopulations: Rosa acicularis Lindl., Rosa spinosissima L., Lonicera altaica Pall., Ribes nigrum L., Ribes petraeum Wulfen, which have high resource indicators and significant areas
Keywords
coenopopulation, phytonosis, жабайы жеміс өсімдіктері, wild berry plants, ценопопуляция, дикие плодовые растения
Kazakhstan
0/0 Free
periodical press (Magazines)
TULEGENOVA A. T.
Tulegenova, A. T. Spectral characteristics of photoluminescence synthesized in the field of radiation YAGG phosphors with different Al/Ga ratio [Text] / A. T. Tulegenova, G. Zh. Nogaibekova , I. A. Saidazimov [et al.] // Қарағанды университетінің хабаршысы. Физика сериясы. - 2024. - № 4 (116). - P. 114-122. - Bibliogr.: p. 120-121 ISSN 2518-7198.
UDC:
535.37
Subject headings
- Luminescence
Annotation
In the study the results of luminescence spectra investigating and excitation of ceramics luminescence with different Al/Ga ratios, synthesized by irradiating a mixture of initial materials with different prehistories were presented.
Keywords
Al/Ga ratio, luminescence, radiation synthesis, high-energy electron beam, люминесценция
Kazakhstan
0/0 Free
periodical press (Magazines)
ABDRASSILOVA A.
Abdrassilova, A. Study of catalysts based on mesoporous aluminosilicate in the dearomatization process of a model mixture: physico-chemical characteristics and catalytic activity
[Text] / A. Abdrassilova, G. Vassilina , K. Abdildina [et al.] // Шәкәрім университетінің хабаршысы. Техника ғылымдар. - 2024. - № 1 (13). - Р. 353-361. - Bibliogr.: р. 358-359 ISSN 2788-7995.
UDC:
54
Subject headings
- Chemistry
Annotation
The article presents the synthesis of mesoporous aluminosilicates and bifunctional catalysts based on them to study the activity of the hydrotreatment process for a model mixture
Keywords
mesoporous aluminosilicates, bifunctional catalysts, hydrodearomatization, model mixture
Kazakhstan
0/0 Free
TASKIN A.
SOURCE IDENTIFICATION PROBLEMS FOR THE NEUTRON TRANSPORT EQUATIONS
periodical press (Magazines)
0/0 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
periodical press (Magazines)
0/0 Free
periodical press (Magazines)
0/0 Free
VDOVINA T. A.
STATE OF COENOPOPULATIONS OF WILD BERRY PLANTS IN THE TERRITORY OF KAZAKHSTAN ALTAI
periodical press (Magazines)
0/0 Free
TULEGENOVA A. T.
SPECTRAL CHARACTERISTICS OF PHOTOLUMINESCENCE SYNTHESIZED IN THE FIELD OF RADIATION YAGG PHOSPHORS WITH DIFFERENT AL/GA RATIO
periodical press (Magazines)
0/0 Free
ABDRASSILOVA A.
STUDY OF CATALYSTS BASED ON MESOPOROUS ALUMINOSILICATE IN THE DEAROMATIZATION PROCESS OF A MODEL MIXTURE: PHYSICO-CHEMICAL CHARACTERISTICS AND CATALYTIC ACTIVITY
periodical press (Magazines)
0/0 Free