Труды сотрудников ИВМ СО РАН

/ V.Shaydurov, T.Liu, Z.Zheng // AIP Conference Proceedings. - 2012. - Vol. 1487: 4th International Conference on Application of Mathematics in Technical and Natural Sciences: Memorial Volume devoted to Prof. Christo I. Christov, AMiTaNS 2012 (11 June 2012 through 16 June 2012, St. Constantine and Helena) . - pp. 42-48, DOI 10.1063/1.4758940 . -
Аннотация: Computational aerodynamics is a key technology in aircraft design which is ahead of physical experiment and complements it. Of course all three components of computational modeling are actively developed: mathematical models of real aerodynamic processes, numerical algorithms, and high-performance computing. The most impressive progress has been made in the field of computing, though with a considerable complication of computer architecture. Numerical algorithms are developed more conservative. More precisely, they are offered and theoretically justified for more simple mathematical problems. Nevertheless, computational mathematics now has amassed a whole palette of numerical algorithms that can provide acceptable accuracy and interface between modern mathematical models in aerodynamics and high-performance computers. A significant step in this direction was the European Project ADIGMA whose positive experience will be used in International Project TRISTAM for further movement in the field of computational technologies for aerodynamics. This paper gives a general overview of objectives and approaches intended to use and a description of the recommended four-stage computer technology. В© 2012 American Institute of Physics.

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Доп.точки доступа:
Liu, T.; Zheng, Z.; Шайдуров, Владимир Викторович

/ V. Shaydurov, T. Liu // Procedia Eng. - 2013. - Vol. 61: 25th International Conference on Parallel Computational Fluid Dynamics, ParCFD 2013 (20 May 2013 through 24 May 2013, Changsha) Conference code: 101818. - P16-22, DOI 10.1016/j.proeng.2013.07.086 . -
Аннотация: All three components of computational aerodynamics are actively developed: mathematical models of real aerodynamic processes, numerical algorithms, and high-performance computing. The most impressive progress has been made in the field of computing, though with a considerable complication of the computer architecture. Numerical algorithms developed more conservative. Nevertheless, computational mathematics now amassed a whole palette of numerical algorithms that can provide acceptable accuracy and interface between modern mathematical models in aerodynamics and high-performance computers. This paper gives a general overview of objectives and approaches of international Project TRISTAM and a description of the four-stage computer technology in the field of computational aerodynamics. © 2013 The Authors.

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Держатели документа:
Beihang University, 37# Xueyuan Road, Haidian District, Beijing, 100191, China
Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences, 50/44 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Liu, T.; Шайдуров, Владимир Викторович

[Text] / L. B. CHUBAROV, Y. I. SHOKIN, V. K. GUSIAKOV // Comput. Fluids. - 1984. - Vol. 12, Is. 2. - P123-132, DOI 10.1016/0045-7930(84)90018-5. - Cited References: 12 . - ISSN 0045-7930РУБ Computer Science, Interdisciplinary Applications + Mechanics


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Держатели документа:
ACAD SCI USSR,CTR COMP,KRASNOYARSK 660036,USSR
ACAD SCI USSR,CTR COMP,NOVOSIBIRSK 630090,USSR
ИВМ СО РАН
Доп.точки доступа:
CHUBAROV, L.B.; SHOKIN, Y.I.; Шокин, Юрий Иванович; GUSIAKOV, V.K.

/ L. B. Chubarov, Yu. I. Shokin, V. K. Gusiakov // Computers and Fluids. - 1984. - Vol. 12, Is. 2. - P123-132 . - ISSN 0045-7930
Аннотация: The paper presents the results of numerical simulation of Shikotan (Nemuro-Oki) tsunami of 17 June 1973. Static deformations of the sea bottom are computed for some dimensional dislocation model of the seismic source with the parameters obtained from seismological observations. The computed bottom deformations are used as the initial conditions for the tsunami propagation problem in the ocean with a real bathymetry, which is considered within the framework of linear theory of shallow water. Three variants of tsunami source are examined. Travel time charts and computed mareograms at a number of points of the shoreline are presented. At 4 points, where tide-gauge records are available, the comparison of the computed mareograms with the observed ones is made. It is found that the numerical model can reproduce the basic features of the tsunami of 17 June 1973. В© 1984.

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Держатели документа:
Computing Center of Siberian Division of the USSR Academy of Sciences, 660036 Krasnoyarsk, 36, Akademgorodok, U.S.S.R.
Siberian Division, the USSR Academy of Sciences, Computing Center, 630090 Novosibirsk, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Chubarov, L.B.; Shokin, Yu.I.; Шокин, Юрий Иванович; Gusiakov, V.K.

/ L. B. Chubarov, Yu. I. Shokin // Computers and Fluids. - 1987. - Vol. 15, Is. 3. - P229-249 . - ISSN 0045-7930
Аннотация: The work is devoted to the questions of numerical modelling of long wave propagation, in particular tsunami waves, in the framework of non-linear dispersion models of the Boussinesq and Korteweg-de Vries type. The first part of the work includes a classification of some known mathematical models, in terms of dispersion correlation, phase and group velocities. Problems arising on the construction of finite-difference approximations of non-linear dispersion models are discussed in the second part of the work, special attention is given to the questions of constructing discrete boundary conditions. In the conclusion the results obtained in the course of numerical experiments and estimation of specifics of finite-difference models, and the contribution of non-linear dispersion effects in the process of wave propagation in the coastal zone, are discussed. The results of calculations of tsunami wave propagation in a wave tube with real bathymetry, are given. В© 1987.

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Держатели документа:
Computing Center of Siberian Division of the U.S.S.R., Academy of Sciences, 660036, Krasnoyarsk 36, Akademgorodok, U.S.S.R.
ИВМ СО РАН

Доп.точки доступа:
Chubarov, L.B.; Shokin, Yu.I.; Шокин, Юрий Иванович

[Text] / L. B. CHUBAROV, Y. I. SHOKIN // Comput. Fluids. - 1987. - Vol. 15, Is. 3. - P229-249, DOI 10.1016/0045-7930(87)90008-9. - Cited References: 25 . - ISSN 0045-7930РУБ Computer Science, Interdisciplinary Applications + Mechanics


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Держатели документа:
ACAD SCI USSR,SIBERIAN DIV,CTR COMP,KRASNOYARSK 36,AKADEMGORODOK,USSR
ИВМ СО РАН
Доп.точки доступа:
CHUBAROV, L.B.; SHOKIN, Y.I.; Шокин, Юрий Иванович

/ S. P. Shary // Mathematics and Computers in Simulation. - 1995. - Vol. 39, Is. 1-2. - P53-85 . - ISSN 0378-4754
Аннотация: For the interval linear system Ax = b, the linear tolerance problem is considered that requires inner evaluation of the tolerable solution set ???(A, b) = {x ? Rn {divides} (?A ? A)(Ax ? b)} formed by all point vectors x such that the product Ax remains within b for all possible A ? A. Along with the simple incompatibility criterion, we develop comprehensive solvability theory for the linear tolerance problem that not only settles whether ??? is empty or not, but also enables modification of the problem to ensure its desired properties. To conclude, we advance several numerical methods of various accuracy and complexity for construction of an interval solution to the linear tolerance problem around a given center. В© 1995.

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Держатели документа:
Computer Center, Siberian Department, Russian Academy of Sciences, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Shary, S.P.; Шарый С.П.

/ V. V. Shaidurov // Computers and Mathematics with Applications. - 1996. - Vol. 31, Is. 4-5. - P161-171 . - ISSN 0898-1221
Аннотация: The paper deals with a cascadic conjugate-gradient method (shortly called the CCG-algorithm) which was proposed by P. Deuflhard and can be considered as a simpler version of a multigrid (multilevel) method. We define it recurrently for discrete self-adjoint positive-definite problems on a sequence of grids. On the coarsest grid, the linear discrete algebraic system is solved directly. On the finer grids, the system is iteratively solved by the conjugate-gradient method where the starting guess is an interpolation of the approximated solution on the previous grid. Any preconditioning or restriction to coarser grids is not implemented. Nevertheless, the CCG-algorithm has the same optimal property compared to multigrid methods; namely, the algorithm converges with a rate which is independent of the number of unknowns and the number of grids. As an example, this property is proved for elliptic second order Dirichlet problems in two-dimensional, convex, polygonal bounded domains. For ensuring convergence, the number of iterations on each grid level has to increase from finer to coarser grids. The optimal dependence of these numbers is established with respect to the mesh size and the number of unknowns. The theory has been presented in an abstract setting which allows the application to both finite element and finite difference methods. CopyrightВ©1996 Elsevier Science Ltd. All rights reserved.

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Держатели документа:
Computing Center, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Shaidurov, V.V.; Шайдуров, Владимир Викторович

[Text] / O. V. Sadovskaya, V. M. Sadovskii, M. P. Varygina // ECCOMAS Thematic Conference - COMPDYN 2013: 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings - An IACM Special Interest Conference. - 2013. - P4578-4592
Аннотация: In the framework of mathematical model of a block medium with elastic blocks interacting through compliant viscoelastic interlayers and its approximation on the basis of equations of the Cosserat continuum, the problems of periodic perturbation of a layer and of a half-space under the action of distributed and localized surface loads are solved numerically. The simple formulas are suggested to determine the elasticity coefficients of the moment continuum by given characteristics of the materials of blocks and interlayers, which provide a good correspondence of the wave fields received by means of the exact and approximate models. Parallel computational algorithms, based on models of the inhomogeneous elasticity theory and the Cosserat elasticity theory, are applied to the analysis of propagation of elastic waves in geomaterials with layered and block microstructure. These algorithms are realized as parallel program systems for GPUs (using CUDA technology) and for multiprocessor computers of the cluster type (using MPI library). Monotone grid-characteristic schemes with a balanced number of time steps in elastic layers or blocks and in viscoelastic interlayers are used. By the analysis of numerical solutions it is shown that the multiblock medium has a resonant frequency of rotational motion of blocks, and this frequency does not depend on the size of a massif and on the boundary conditions at its surface.

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Полный текст


Доп.точки доступа:
Sadovskii, V.M.; Садовский, Владимир Михайлович; Varygina, M.P.; Варыгина, Мария Петровна; Садовская, Оксана Викторовна

/ N. Shaparev // Communications in Computer and Information Science. - 2015. - Vol. 549: 8th International Conference on Mathematical Modeling of Technological Processes, CITech 2015; Almaty; Kazakhstan; 24 September 2015 through 27 September 2015; Code 159049. - P133-142, DOI 10.1007/978-3-319-25058-8_14 . -
Аннотация: In this paper we find spatial and average dependences of the optical medium thickness, spectral profile and absorption line width on the initial thickness of the medium and the ratio between the limiting velocity of self-similar expansion and the thermal velocity of atoms. © Springer International Publishing Switzerland 2015.

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Держатели документа:
Institute of Computational Modeling, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
National Research Tomsk State University, Tomsk, Russian Federation

Доп.точки доступа:
Шапарев, Николай Якимович

/ E. Kirik, A. Malyshev, M. Senashova // Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - 2016. - Vol. 9574: 11th International Conference on Parallel Processing and Applied Mathematics, PPAM 2015; Krakow; Poland; 6 September 2015 through 9 September 2015; Code 173429. - P539-549, DOI 10.1007/978-3-319-32152-3_50 . -
Аннотация: The discrete-continuous model is a novel contribution to mathematical modeling of pedestrian dynamics. This model is of individual type; people (particles) move in a continuous space, – in this sense the model is continuous. But the number of directions for the particles to move is limited, – in this sense the model is discrete. The model is realized in the computer evacuation module SigmaEva. This article is focused on a presenting of the model and computational aspects and the model is discussed in respect with discrete and continuous models. © Springer International Publishing Switzerland 2016.

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Смотреть статью,
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Держатели документа:
Institute of Computational Modelling SB RAS, Akademgorodok 50/44, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kirik, E.; Malyshev, A.; Senashova, M.

/ N. Shaparev, O. Yakubailik // MATEC Web of Conferences. - 2016. - Vol. 79: 7th Scientific Conference on Information-Measuring Equipment and Technologies, IME and T 2016 (25 May 2016 through 28 May 2016, ) Conference code: 124242, DOI 10.1051/matecconf/20167901081 . -
Аннотация: The work considers information and computing technologies supporting regional decisions making and based on geoinformation websystems and mapping web-services. The use of such systems for the information support of regional management is now becoming common. Long-term strategic forecasting and planning of territories development, solution of various institutional and sectoral problems today are often based on the use of integrated information and computing environment, complex information systems of regional management, which are based on geospatial (mapping) data. This paper discusses technologies and webservices used in the creation and implementation of regional geoinformation web-systems. Such systems provide access to huge arrays of geospatial information and services distributed in the Internet, remote data processing with high performance multi-user computers. Problems of choosing basic software such as geoinformation platform, advantages and disadvantages of existing solutions are discussed. The software structure and basic web-GIS components are analyzed. Examples of completed projects are given. © The Authors, published by EDP Sciences, 2016.

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Смотреть статью,
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Держатели документа:
Institute of Computational Modeling SB RAS, Krasnoyarsk, Russian Federation
National Research Tomsk State University, Tomsk, Russian Federation

Доп.точки доступа:
Yakubaylik, O.E.; Якубайлик, Олег Эдуардович; Шапарев, Николай Якимович

[Текст] / А. В. Лапко [и др.]. - [Б. м. : б. и.], 1999. - Б. ц.
Перевод заглавия: An elaboration of a theoretical foundation of an optimal synthesis and analysis of multilevel nonparametric systems of classification.
   Перевод заглавия: An elaboration of a theoretical foundation of an optimal synthesis and analysis of multilevel nonparametric systems of classification.
Аннотация: Созданы теоретические основы оптимального статистического<BR>синтеза и анализа многоуровневых непараметрических систем<BR>классификации, обеспечивающих обход проблем больших выборок<BR>и рациональное использование априорных сведений при решении<BR>задач распознавания образов. В рамках нового научного<BR>направления разработаны статистические модели комплекса<BR>развивающихся систем с дискретным временем по данным<BR>повторяющихся реализаций динамики их параметров, включая<BR>пространственно распределённые процессы развития. Предложен<BR>и обоснован оригинальный рандомизированный подход<BR>определения коэффициентов размытости непараметрических<BR>решающих правил, использующий идею их случайного выбора.<BR>Исследованы асимптотические свойства статистических оценок<BR>вероятностных показателей эффективности изучаемого класса<BR>систем, определена зависимость их скоростей сходимости от<BR>параметров структуры и объёма обучающих выборок. На этой<BR>основе построены доверительные границы непараметрических<BR>решающих функций и критерии оценивания показателей их<BR>эффективности в условиях ограниченных выборок.<BR>Результаты исследований реализованы в виде интеллектуальной<BR>информационной технологии автоматизации проектирования<BR>многоуровневых непараметрических систем классификации в<BR>среде визуального программирования Delphi для IBM<BR>совместимых компьютеров. Опубликованы монографии<BR>"Многоуровневые непараметрические системы принятия решений",<BR>"Имитационные модели пространственно распределённых<BR>экологических систем", подготовлена и cдана в издательство<BR>книга "Непараметрические системы классификации", защищены<BR>три кандидатских и докторская диссертации.
A theoretical foundation of an optimal synthesis and<BR>analysis of multilevel nonparametric systems of<BR>classification were elaborated, which provide a bypass<BR>of large samples problems and a rational using of an<BR>a priori information in a decision of pattern<BR>recognition tasks. In a new scientific framework<BR>statistical models of a developing system complex with<BR>a discrete time by the data of repeating measurements<BR>of their parameters dynamics, including spatially<BR>distributed development processes. An original<BR>randomised approach to a determination of fuzzifying<BR>coefficients of non-parametric decision rules, which<BR>used an idea of their random sampling, was proposed<BR>and proved. Asymptotic properties of statistical<BR>estimates of probabilistic efficiency indices of a<BR>studied systems class were investigated. Their degree<BR>of convergence dependence of their structure<BR>parameters and a training samples size was determined.<BR>On this basis confidence limits of non-parametric<BR>decision functions and estimation criteria of their<BR>efficiency indices were constructed in the conditions<BR>of limited samples.<BR>Investigation results are realised as an intelligent<BR>computer technology for a designing of the multilevel<BR>nonparametric systems of classification. It was<BR>realised in the Delphi visual programming environment<BR>for IBM compatible computers.<BR>Monographs "Nonparametric systems of classification"<BR>and "Imitation models of spatially distributed<BR>ecological systems" was prepared and is in the press,<BR>three kandidat and one doctor dissertations were<BR>defended.

РИНЦ

Держатели документа:
Институт вычислительного моделирования СО РАН (ИВМ СО РАН)

Доп.точки доступа:
Лапко, А.В.; Lapko A.V.; Юдин, Н.А.; Новоходько, Н.А.; Ченцов, С.В.; Высоцкая, Г.С.
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