[Текст] : статья / Е.Ю. Бушмелев и др. // Int. conf. on Bioinformatics. - 2011. - p. 65
Доп.точки доступа:
Садовский, Михаил Георгиевич; Sadovskii M.G.
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Найдено документов в текущей БД: 4
Phenomenological modeling ofdeformation of porous and cellular materials taking into account the increase in stiffness because of the collapse of pores
[Text] / V. M. Sadovskii, O. V. Sadovskaya // ECCOMAS Thematic Conference - COMPDYN 2013: 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings - An IACM Special Interest Conference. - 2013. - P4277-4286
Кл.слова (ненормированные):
Cellular Material -- Porous Metal -- Expansion of Cavity -- Incomplete Plasticity -- Full Plasticity -- Parallel Program System
Аннотация: Mathematical model for the description of deformation of a porous material with a random distribution of pores is constructed on the basis of generalized rheological method taking into account the different resistance of a material to tension and compression. Phenomenological parameters of the model are determined by means of the approximate computations for the problem of static loading of a cubic periodicity cell with spherical cavities. Within the framework of this theory the fields of displacements and stresses around expanding cavity of spherical shape in a homogenious space are constructed. It is shown that the porosity does not change at the stage of elastic deformation. When the pressure increases, a zone of plastic compaction is formed in the vicinity of a cavity, and in a part of this zone the collapse of pores takes place. Engineering formulas for calculation of critical pressures of the elastic limit state and the limit state of a medium with open pores, and also the formulas for determining the radiuses of interfaces of zones of plasticity and compaction are obtained. A complex of parallel programs for numerical analysis of the dynamic deformation of porous materials on multiprocessor computer systems is worked out. By means of this complex a series of computations for deformation of the protection elements, made of metal foams, under the action of localizedim pulsive loads was performed. The random nature of distribution of the pores size is taken into account with the help of computer modeling. Computations allow one to estimate plastic dissipative part of the energy of impact.
Scopus,
Полный текст на сайте конференции,
Полный текст
Доп.точки доступа:
Sadovskaya, O.V.; Садовская, Оксана Викторовна; Садовский, Владимир Михайлович
Кл.слова (ненормированные):
Cellular Material -- Porous Metal -- Expansion of Cavity -- Incomplete Plasticity -- Full Plasticity -- Parallel Program System
Аннотация: Mathematical model for the description of deformation of a porous material with a random distribution of pores is constructed on the basis of generalized rheological method taking into account the different resistance of a material to tension and compression. Phenomenological parameters of the model are determined by means of the approximate computations for the problem of static loading of a cubic periodicity cell with spherical cavities. Within the framework of this theory the fields of displacements and stresses around expanding cavity of spherical shape in a homogenious space are constructed. It is shown that the porosity does not change at the stage of elastic deformation. When the pressure increases, a zone of plastic compaction is formed in the vicinity of a cavity, and in a part of this zone the collapse of pores takes place. Engineering formulas for calculation of critical pressures of the elastic limit state and the limit state of a medium with open pores, and also the formulas for determining the radiuses of interfaces of zones of plasticity and compaction are obtained. A complex of parallel programs for numerical analysis of the dynamic deformation of porous materials on multiprocessor computer systems is worked out. By means of this complex a series of computations for deformation of the protection elements, made of metal foams, under the action of localizedim pulsive loads was performed. The random nature of distribution of the pores size is taken into account with the help of computer modeling. Computations allow one to estimate plastic dissipative part of the energy of impact.
Scopus,
Полный текст на сайте конференции,
Полный текст
Доп.точки доступа:
Sadovskaya, O.V.; Садовская, Оксана Викторовна; Садовский, Владимир Михайлович
Strong inhomogeneity in triplet distribution alongside a genome
/ M. Sadovsky, X. Nikitina // (15 April 2015 through 17 April 2015. - 2015. - Vol. 9044. - P248-255
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Кл.слова (ненормированные):
Inhomogeneity -- Longest gap -- Order -- Periodicity -- Track -- Bioinformatics -- Biomedical engineering -- Mammals -- Inhomogeneities -- Longest gap -- Order -- Periodicity -- Track -- Genes
Аннотация: The distribution of triplets alongside a genome is studied.We explored the distribution to the nearest neighbour, that is the pattern where two triplets are fixed, and the distance is determined from the former to the latter so that the second triplet takes place nowhere inside the observed gap surrounded with the couple of the given triplets. The distribution differs strongly, for different organisms. Yeast and bacteria seem to have rather smooth pattern, while mammalia and other higher eukaryotes exhibit very complex patterns with long-range correlations in the triplet distribution. © Springer International Publishing Switzerland 2015.
Scopus
Держатели документа:
Institute of computational modelling of SB RASAkademgorodok, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Sadovsky, M.G.; Садовский, Михаил Георгиевич; Nikitina, X.
Кл.слова (ненормированные):
Inhomogeneity -- Longest gap -- Order -- Periodicity -- Track -- Bioinformatics -- Biomedical engineering -- Mammals -- Inhomogeneities -- Longest gap -- Order -- Periodicity -- Track -- Genes
Аннотация: The distribution of triplets alongside a genome is studied.We explored the distribution to the nearest neighbour, that is the pattern where two triplets are fixed, and the distance is determined from the former to the latter so that the second triplet takes place nowhere inside the observed gap surrounded with the couple of the given triplets. The distribution differs strongly, for different organisms. Yeast and bacteria seem to have rather smooth pattern, while mammalia and other higher eukaryotes exhibit very complex patterns with long-range correlations in the triplet distribution. © Springer International Publishing Switzerland 2015.
Scopus
Держатели документа:
Institute of computational modelling of SB RASAkademgorodok, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Sadovsky, M.G.; Садовский, Михаил Георгиевич; Nikitina, X.
Mathematical Modeling of Deformation of a Porous Medium, Considering Its Strengthening Due to Pore Collapse
[Text] / V. M. Sadovskii, O. V. Sadovskaya ; ed. M. D. Todorov // APPLICATION OF MATHEMATICS IN TECHNICAL AND NATURAL SCIENCES : AMER INST PHYSICS, 2015. - Vol. 1684: 7th International Conference on Application of Mathematics in Technical (JUN 28-JUL 03, 2015, Albena, BULGARIA). - Ст. UNSP 070006. - (AIP Conference Proceedings), DOI 10.1063/1.4934307. - Cited References:18
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РУБ Mathematics, Applied + Physics, Applied
Аннотация: Based on the generalized rheological method, the mathematical model describing small deformations of a single-phase porous medium without regard to the effects of a fluid or gas in pores is constructed. The change in resistance of a material to the external mechanical impacts at the moment of pore collapse is taken into account by means of the von Mises-Schleicher strength condition. In order to consider irreversible deformations, alongside with the classical yield conditions by von Mises and Tresca-Saint-Venant, the special condition modeling the plastic loss of stability of a porous skeleton is used. The random nature of the pore size distribution is taken into account. It is shown that the proposed mathematical model satisfies the principles of thermodynamics of irreversible processes. Phenomenological parameters of the model are determined on the basis of the approximate calculation of the problem on quasi-static loading of a cubic periodicity cell with spherical voids. In the framework of the obtained model, the process of propagation of plane longitudinal waves of the compression in a homogenous porous medium, accompanied by the plastic deformation of a skeleton and the collapse of pores, is analyzed.
WOS,
Scopus,
Смотреть статью
Держатели документа:
SB RAS, Inst Computat Modeling, Akademgorodok 50-44, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Sadovskii, V. M.; Sadovskaya, O. V.; Todorov, M.D. \ed.\
Аннотация: Based on the generalized rheological method, the mathematical model describing small deformations of a single-phase porous medium without regard to the effects of a fluid or gas in pores is constructed. The change in resistance of a material to the external mechanical impacts at the moment of pore collapse is taken into account by means of the von Mises-Schleicher strength condition. In order to consider irreversible deformations, alongside with the classical yield conditions by von Mises and Tresca-Saint-Venant, the special condition modeling the plastic loss of stability of a porous skeleton is used. The random nature of the pore size distribution is taken into account. It is shown that the proposed mathematical model satisfies the principles of thermodynamics of irreversible processes. Phenomenological parameters of the model are determined on the basis of the approximate calculation of the problem on quasi-static loading of a cubic periodicity cell with spherical voids. In the framework of the obtained model, the process of propagation of plane longitudinal waves of the compression in a homogenous porous medium, accompanied by the plastic deformation of a skeleton and the collapse of pores, is analyzed.
WOS,
Scopus,
Смотреть статью
Держатели документа:
SB RAS, Inst Computat Modeling, Akademgorodok 50-44, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Sadovskii, V. M.; Sadovskaya, O. V.; Todorov, M.D. \ed.\