Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva最新文献_第5页

Numerical modeling of the formation of D-T mixture spherical layer in micro-targets of LTS LTS微靶中D-T混合球层形成的数值模拟

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-30 DOI: 10.15507/2079-6900.23.202104.394-411

E. Y. Kireicheva, E. A. Veselova, T. F. Mamedova

引用次数: 0

To the 75th anniversary of Evgeniy Borisovich Kuznetsov 为库兹涅佐夫诞辰75周年干杯

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-30 DOI: 10.15507/2079-6900.23.202104.477-477

引用次数: 0

Theoretical Analysis of Fully Conservative Difference Schemes with Adaptive Viscosity 具有自适应粘度的全保守差分格式的理论分析

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-30 DOI: 10.15507/2079-6900.23.202104.412-423

M. Ladonkina, Yu.A. Poveshenko, Orkhan R. Ragimli, Haochen Zhang

{"title":"Theoretical Analysis of Fully Conservative Difference Schemes with Adaptive Viscosity","authors":"M. Ladonkina, Yu.A. Poveshenko, Orkhan R. Ragimli, Haochen Zhang","doi":"10.15507/2079-6900.23.202104.412-423","DOIUrl":"https://doi.org/10.15507/2079-6900.23.202104.412-423","url":null,"abstract":"For the equations of gas dynamics in Eulerian variables, a family of two-layer in time completely conservative difference schemes with space-profiled time weights is constructed. Considerable attention is paid to the methods of constructing regularized flows of mass, momentum, and internal energy that do not violate the properties of complete conservatism of difference schemes of this class, to the analysis of their amplitudes and the possibility of their use on non-uniform grids. Effective preservation of the balance of internal energy in this type of divergent difference schemes is ensured by the absence of constantly operating sources of difference origin that produce \"computational\"entropy (including those based on singular features of the solution). The developed schemes can be easily generalized in order to calculate high-temperature flows in media that are nonequilibrium in temperature (for example, in a plasma with a difference in the temperatures of the electronic and ionic components), when, with the set of variables necessary for describing the flow, it is not enough to equalize the total energy balance.","PeriodicalId":273445,"journal":{"name":"Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134194948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

On modelling of thermodynamic interaction of particles suspended in two-dimensional medium 二维介质中悬浮粒子热力学相互作用的模拟

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-30 DOI: 10.15507/2079-6900.23.202104.444-460

A. Syromyasov, Yulia V. Ponkratova, Tatyana V. Menshakova

{"title":"On modelling of thermodynamic interaction of particles suspended in two-dimensional medium","authors":"A. Syromyasov, Yulia V. Ponkratova, Tatyana V. Menshakova","doi":"10.15507/2079-6900.23.202104.444-460","DOIUrl":"https://doi.org/10.15507/2079-6900.23.202104.444-460","url":null,"abstract":"Analytical description of temperature distribution in a medium with foreign inclusions is difficult due to the complicated geometry of the problem, so asymptotic and numerical methods are usually used to model thermodynamic processes in heterogeneous media. To be convinced in convergence of these methods the authors consider model problem about two identical round particles in infinite planar medium with temperature gradient which is constant at infinity. Authors refine multipole expansion of the solution obtained earlier by continuing it up to higher powers of small parameter, that is nondimensional radius of thermodynamically interacting particles. Numerical approach to the problem using ANSYS software is described; in particular, appropriate choice of approximate boundary conditions is discussed. Authors ascertain that replacement of infinite medium by finite-sized domain is important source of error in FEM. To find domain boundaries in multiple inclusions’ problem the authors develop “fictituous particle” method; according to it the cloud of particles far from the center of the cloud acts approximately as a single equivalent particle of greater size and so may be replaced by it. Basing on particular quantitative data the dependence of domain size that provides acceptable accuracy on thermal conductivities of medium and of particles is explored. Authors establish series of numerical experiments confirming convergence of multipole expansions method and FEM as well; proximity of their results is illustrated, too.","PeriodicalId":273445,"journal":{"name":"Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134340396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical analysis of heating by a current pulse of a niobium nitride membrane in its longitudinal section 氮化铌膜纵截面电流脉冲加热的数值分析

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-30 DOI: 10.15507/2079-6900.23.202104.424-432

N. D. Kuzmichev, E. Danilova, M. A. Vasyutin

引用次数: 0

To the 75th anniversary of Vyacheslav Zigmundovich Grines 敬维亚切斯拉夫·齐格蒙多维奇·格里涅斯诞辰75周年

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-30 DOI: 10.15507/2079-6900.23.202104.472-476

引用次数: 0

On topology of manifolds admitting gradient-like calscades with surface dynamics and on growth of the number of non-compact heteroclinic curves 具有表面动力学的类梯度级联流形的拓扑结构及非紧异斜曲线数目的增长

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-30 DOI: 10.15507/2079-6900.23.202104.379-393

V. Grines, E. Gurevich, Evgenii Iv. Yakovlev

{"title":"On topology of manifolds admitting gradient-like calscades with surface dynamics and on growth of the number of non-compact heteroclinic curves","authors":"V. Grines, E. Gurevich, Evgenii Iv. Yakovlev","doi":"10.15507/2079-6900.23.202104.379-393","DOIUrl":"https://doi.org/10.15507/2079-6900.23.202104.379-393","url":null,"abstract":"We consider a class GSD(M3) of gradient-like diffeomorphisms with surface dynamics given on closed oriented manifold M3 of dimension three. Earlier it was proved that manifolds admitting such diffeomorphisms are mapping tori under closed orientable surface of genus g, and the number of non-compact heteroclinic curves of such diffeomorphisms is not less than 12g. In this paper, we determine a class of diffeomorphisms GSDR(M3)⊂GSD(M3) that have the minimum number of heteroclinic curves for a given number of periodic points, and prove that the supporting manifold of such diffeomorphisms is a Seifert manifold. The separatrices of periodic points of diffeomorphisms from the class GSDR(M3) have regular asymptotic behavior, in particular, their closures are locally flat. We provide sufficient conditions (independent on dynamics) for mapping torus to be Seifert. At the same time, the paper establishes that for any fixed g geq1, fixed number of periodic points, and any integer n≥12g, there exists a manifold M3 and a diffeomorphism f∈GSD(M3) having exactly n non-compact heteroclinic curves.","PeriodicalId":273445,"journal":{"name":"Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124160376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of dynamic processes in pressure measurement systems for gas-liquid media 气液介质压力测量系统动态过程研究

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-30 DOI: 10.15507/2079-6900.23.202104.461-471

Yuliya A. Tamarova, P. A. Velmisov, N. D. Aleksanin, Nail I. Nurullin

{"title":"Investigation of dynamic processes in pressure measurement systems for gas-liquid media","authors":"Yuliya A. Tamarova, P. A. Velmisov, N. D. Aleksanin, Nail I. Nurullin","doi":"10.15507/2079-6900.23.202104.461-471","DOIUrl":"https://doi.org/10.15507/2079-6900.23.202104.461-471","url":null,"abstract":"Initial-boundary value problems for systems of differential equations are considered, which are mathematical models of the mechanical system \"pipeline - pressure sensor\". In such a system, to mitigate the effects of vibration accelerations and high temperatures, the sensor is located at a certain distance from the engine and is connected to it via a pipeline. The \"pipeline - pressure sensor\" system is designed to measure pressure in gas-liquid media, for example, to control the pressure of the working medium in the combustion chambers of engines. On the basis of the proposed models, the joint dynamics of the sensitive element of the pressure sensor and the working medium in the pipeline is studied. To describe the motion of the working medium, linear models of fluid and gas mechanics are used, to describe the dynamics of a sensitive element, linear models of the mechanics of a deformable solid are applied. Analytical and numerical methods for solving initial-boundary value problems under study are presented. The numerical study of the initial-boundary value problem was carried out on the basis of the Galerkin method. In analytical study using the introduction of averaged characteristics, the solution of the original two-dimensional problem is reduced to the study of a one-dimensional model, whose further study made it possible to reduce the solution of the problem to the study of a differential equation with a deviating argument. Also, a numerical experiment is carried out and an example of calculating the deflection of the sensor’s moving element is presented.","PeriodicalId":273445,"journal":{"name":"Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127833442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of ethnocultural values in the Finno-Ugric regions: dominants of Finno-Ugric culture and ways of their actualization in modern society 芬兰-乌戈尔地区的民族文化价值研究:芬兰-乌戈尔文化的优势及其在现代社会的实现途径

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-29 DOI: 10.15507/2076-2577.013.2021.04.428-439

E. Lomshina, O. Safonkina, Elena N. Antipkina

{"title":"Study of ethnocultural values in the Finno-Ugric regions: dominants of Finno-Ugric culture and ways of their actualization in modern society","authors":"E. Lomshina, O. Safonkina, Elena N. Antipkina","doi":"10.15507/2076-2577.013.2021.04.428-439","DOIUrl":"https://doi.org/10.15507/2076-2577.013.2021.04.428-439","url":null,"abstract":"Introduction. The use of the axiological field of the Finno-Ugric culture within the framework of the formation of the socio-humanitarian component of modern education presupposes the acquisition of new knowledge related to the study of the value dominants of the Finno-Ugric culture in diachrony and the ways of their actualization in modern society. The article considers the study of the ethnocultural values of the Finno-Ugric peoples on the example of the Baltic-Finnish (Karelians, Vepsians), Perm (Udmurts, Komi), Volga (Mordovins, Mari), Ugric (Khanty, Mansi) groups.\u0000Materials and Methods. The material was the data of a questionnaire on the value dominants of the Finno-Ugric culture and the ways of their actualization in modern society. The research methodology includes a combination of humanitarian (cultural-anthropological, axiosociometric, functional, cross-cultural) approaches and natural research methods of analysis (mathematical statistics).\u0000Results and Discussion. With the help of the questionnaire developed by the authors, a cross-cultural study was carried out, which made it possible to identify the system of ethnocultural values of the Finno-Ugric peoples, as well as the most important value dominants characteristic of these peoples at the present stage. The main mechanisms of actualization of the value dominants of the Finno-Ugric culture, as well as Russian experience, are demonstrated.\u0000Conclusion. The main provisions and conclusions of the work can be used in the further study of the problem of the place and role of the axiological field of ethnoculture in a renewing society, as well as to optimize the ethno-cultural policy of modern Russia, including ethno-branding of territories.","PeriodicalId":273445,"journal":{"name":"Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128010459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Female everyday life in letters by a Karelian peasant woman of the early XX century 二十世纪初一位卡累利阿农妇笔下的女性日常生活

Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva Pub Date : 2021-12-29 DOI: 10.15507/2076-2577.013.2021.04.379-393

O. Ilyukha

{"title":"Female everyday life in letters by a Karelian peasant woman of the early XX century","authors":"O. Ilyukha","doi":"10.15507/2076-2577.013.2021.04.379-393","DOIUrl":"https://doi.org/10.15507/2076-2577.013.2021.04.379-393","url":null,"abstract":"Introduction. The article reports the results of an analysis of the letters written by a peasant early in the XX century, found in the National Archives of Finland, which are a rare-type of historical source. Their author is a twenty-year-old peasant Anna Eremeeva-Räikha, who wrote them to her husband exiled to North Kazakhstan. The relevance of the study is defined by high interest to epistolary cultural heritage, where a special place is given to the letters of Russian’s different ethnic groups, and also by attention paid to the history of everyday life.\u0000Materials and Methods. The principal method was analysis of the structure of the letters, including identification of thematic block sequences and their subsequent clustering for the analysis of specific issues.\u0000Results and Discussion. The article explicates the substantive dimension of the letters, which reflects the sphere of interests of their author, and looks into the descriptions of women’s daily routines and the life of the Karelian family. It highlights the range of covered subjects and outlines the topics showing the routines and the behavioral practices of a peasant woman, her ways of adapting to the new circumstances after the husband’s arrest. The specific jobs and occupations are aligned with the farming calendar of northern Karelia. Features of the author’s self-presentation, ways of structuring and drawing up the texts are demonstrated. The study illustrates the range of topics and emotions rooted in the gender factor, and the diversity of their expression.\u0000Conclusion. The letters disclose the system of moral values of a Karelian woman, the Christian ideal of family relationships, special features of professional motivations. The “voice” of a Karelian peasant woman retained in these letters is a relevant source for studying the alteration of women’s everyday life early in the XX century and it allows talking about the maturing demand for emancipation in everyday life and gradual loosening of the traditional gender order in the Karelian village.","PeriodicalId":273445,"journal":{"name":"Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121971187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0