[Text] : alternative Grad equations / A.N. Gorban, I.V. Karlin // Physical Review E. - 1996. - Vol. 54, № 4. - p. R3109-R3112
Перевод заглавия: Скорости рассеяния вместо моментов. Альтернативные уравнения Грэда
Аннотация: Scattering rates moments of collision integral! are treated as independent variables, and as an alternative to moments of the distribution function, to describe the rarefied gas near local equilibrium. A version of the entropy maximum principle is used to derive the Grad-like description in terms of a finite number of scattering rates. The equations are compared to the Grad moment system in the heat nonconductive case. Estimations for hard spheres demonstrate, in particular, some 10% excess of the viscosity coefficient resulting from the scattering rate description, as compared to the Grad moment estimation.
http://icm.krasn.ru/refextra.php?id=69,
Полный текст
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Karlin, I.V.; Карлин, Илья Вениаминович; Горбань, Александр Николаевич
Труды сотрудников ИВМ СО РАН
w10=
Найдено документов в текущей БД: 96
The integral OLAP-model of the emergency risk estimation in the case of Krasnoyarsk region
/ A.V. Korobko [et al.] // 2013 36th International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2013 - Proceedings. - 2013. - 2013 36th International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2013 (20 May 2013 through 24 May 2013, Opatija) Conference code: 100031. - Ст. 6596432. - P1161-1166
. -
Кл.слова (ненормированные):
Analytical queries -- Emergency risk -- Communication systems -- Information technology -- Microelectronics -- Query processing -- Risks
Аннотация: The paper focuses on implementation of the integral OLAP-model constructing method for the emergency risk estimation in the case of Krasnoyarsk region. Emergency, meteorological, hydrological, seismological, radiation, flood, housing and communal situations are observed. The process of an analytical query constructing support based on integral OLAP-model is described. Discovered nonstandard analytical dependencies between monitoring data and correspond cube-concept of the integral OLAP-model are depicted. The paper is aimed at representing of the integral OLAP-model advantages and its potential. В© 2013 MIPRO.
Scopus
Доп.точки доступа:
Korobko, A.V.; Коробко, Анна Владимировна; Penkova, T.G.; Пенькова, Татьяна Геннадьевна; Nicheporchuk, V.V.; Ничепорчук, Валерий Васильевич; Mihalev, A.S.
Кл.слова (ненормированные):
Analytical queries -- Emergency risk -- Communication systems -- Information technology -- Microelectronics -- Query processing -- Risks
Аннотация: The paper focuses on implementation of the integral OLAP-model constructing method for the emergency risk estimation in the case of Krasnoyarsk region. Emergency, meteorological, hydrological, seismological, radiation, flood, housing and communal situations are observed. The process of an analytical query constructing support based on integral OLAP-model is described. Discovered nonstandard analytical dependencies between monitoring data and correspond cube-concept of the integral OLAP-model are depicted. The paper is aimed at representing of the integral OLAP-model advantages and its potential. В© 2013 MIPRO.
Scopus
Доп.точки доступа:
Korobko, A.V.; Коробко, Анна Владимировна; Penkova, T.G.; Пенькова, Татьяна Геннадьевна; Nicheporchuk, V.V.; Ничепорчук, Валерий Васильевич; Mihalev, A.S.
Метод второго порядка для решения аддитивных жестких задач
[Текст] / Е.А. Новиков // Компьютерное моделирование 2013 : труды международной научно-технической конференции. - Санкт-Петербург, 2013. - С. 39-44
Кл.слова (ненормированные):
stiff additive problem -- one-step scheme -- (m,k)-method -- error estimation
Аннотация: Is constructed the method of second order of accuracy for solution of additive stiff systems of ordinary differential equations. The inequalities for control of accuracy are obtained. The results of calculation are presented.
Полный текст
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Novikov E.A.
Кл.слова (ненормированные):
stiff additive problem -- one-step scheme -- (m,k)-method -- error estimation
Аннотация: Is constructed the method of second order of accuracy for solution of additive stiff systems of ordinary differential equations. The inequalities for control of accuracy are obtained. The results of calculation are presented.
Полный текст
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Novikov E.A.
Loss of hydrogen and oxygen from the upper atmosphere of Venus
[Text] / H. Lammer [et al.] // Planet Space Sci. - 2006. - Vol. 54, Is. 13-14. - P1445-1456, DOI 10.1016/j.pss.2006.04.022. - Cited References: 93
. - ISSN 0032-0633
РУБ Astronomy & Astrophysics
Аннотация: Atmospheric escape from the upper atmosphere of Venus is mainly influenced by the loss of hydrogen and oxygen caused by the interaction of solar radiation and particle flux with the unprotected planetary environment. Because one main aim of the ASPERA-4 particle/plasma and VEX-MAG magnetic field experiments on board of ESA's forthcoming Venus Express mission is the investigation of atmospheric erosion processes from the planet's ionosphere-exosphere environment, we study the total loss of hydrogen and oxygen and identified the efficiency of several escape mechanisms involved. For the estimation of pick up loss rates we use a gas dynamic test particle model and obtained average loss rates for H+, and O+ pick up ions of about 1 x 10(25) s(-1) and about 1.6 x 10(25) s(-1), respectively. Further, we estimate ion loss rates due to detached plasma clouds, which were observed by the pioneer Venus orbiter and may be triggered by the Kelvin-Helmholtz instability of about 0.5-1 x 10(25) s(-1). Thermal atmospheric escape processes and atmospheric loss by photo-chemically produced oxygen atoms yield negligible loss rates. Sputtering by incident pick up O+ ions give O atom loss rates in the order of about 6 x 10(24) s(-1). On the other hand, photo-chemically produced hot hydrogen atoms are a very efficient loss mechanism for hydrogen on Venus with a global average total loss rate of about 3.8 x 10(25) s(-1), which is in agreement with Donahue and Hartle [1992. Solar cycle variations in H+ and D+ densities in the Venus ionosphere: implications for escape. Geophys. Res. Lett. 12, 2449-2452] and of the same order but less than the estimated H+ ion outflow on the Venus nightside of about 7.0 x 10(25) s(-1) due to acceleration by an outward electric polarization force related to ionospheric holes by Hartle and Grebowsky [1993. Light ion flow in the nightside ionosphere of Venus. J. Geophys. Res. 98, 7437-7445]. Our study indicates that on Venus, due to its larger mass and size compared to Mars, the most relevant atmospheric escape processes of oxygen involve ions and are caused by the interaction with the solar wind. The obtained results indicate that the ratio between H/O escape to space from the Venusian upper atmosphere is about 4, and is in a much better agreement with the stoichiometrically H/O escape ratio of 2:1, which is not the case on Mars. However, a detailed analysis of the outflow of ions from the Venus upper atmosphere by the ASPERA-4 and VEX-MAG instruments aboard Venus Express will lead to more accurate atmospheric loss estimations and a better understanding of the planet's water inventory. (c) 2006 Elsevier Ltd. All rights reserved.
Доп.точки доступа:
Lammer, H.; Lichtenegger, H.I.M.; Biernat, H.K.; Erkaev, N.V.; Еркаев, Николай Васильевич; Arshukova, I.L.; Kolb, C.; Gunell, H.; Lukyanov, A.; Holmstrom, M.; Barabash, S.; Zhang, T.L.; Baumjohann, W.
Рубрики:
KELVIN-HELMHOLTZ INSTABILITY
ELECTRON-IMPACT IONIZATION
GLOBAL HYBRID SIMULATION
SOLAR-WIND INTERACTION
LYMAN-ALPHA-DATA
CHARGE-EXCHANGE
HOT OXYGEN
ISOTOPIC FRACTIONATION
CYCLE CHANGES
ION FLOW
Кл.слова (ненормированные):
Venus -- atmospheric loss
KELVIN-HELMHOLTZ INSTABILITY
ELECTRON-IMPACT IONIZATION
GLOBAL HYBRID SIMULATION
SOLAR-WIND INTERACTION
LYMAN-ALPHA-DATA
CHARGE-EXCHANGE
HOT OXYGEN
ISOTOPIC FRACTIONATION
CYCLE CHANGES
ION FLOW
Кл.слова (ненормированные):
Venus -- atmospheric loss
Аннотация: Atmospheric escape from the upper atmosphere of Venus is mainly influenced by the loss of hydrogen and oxygen caused by the interaction of solar radiation and particle flux with the unprotected planetary environment. Because one main aim of the ASPERA-4 particle/plasma and VEX-MAG magnetic field experiments on board of ESA's forthcoming Venus Express mission is the investigation of atmospheric erosion processes from the planet's ionosphere-exosphere environment, we study the total loss of hydrogen and oxygen and identified the efficiency of several escape mechanisms involved. For the estimation of pick up loss rates we use a gas dynamic test particle model and obtained average loss rates for H+, and O+ pick up ions of about 1 x 10(25) s(-1) and about 1.6 x 10(25) s(-1), respectively. Further, we estimate ion loss rates due to detached plasma clouds, which were observed by the pioneer Venus orbiter and may be triggered by the Kelvin-Helmholtz instability of about 0.5-1 x 10(25) s(-1). Thermal atmospheric escape processes and atmospheric loss by photo-chemically produced oxygen atoms yield negligible loss rates. Sputtering by incident pick up O+ ions give O atom loss rates in the order of about 6 x 10(24) s(-1). On the other hand, photo-chemically produced hot hydrogen atoms are a very efficient loss mechanism for hydrogen on Venus with a global average total loss rate of about 3.8 x 10(25) s(-1), which is in agreement with Donahue and Hartle [1992. Solar cycle variations in H+ and D+ densities in the Venus ionosphere: implications for escape. Geophys. Res. Lett. 12, 2449-2452] and of the same order but less than the estimated H+ ion outflow on the Venus nightside of about 7.0 x 10(25) s(-1) due to acceleration by an outward electric polarization force related to ionospheric holes by Hartle and Grebowsky [1993. Light ion flow in the nightside ionosphere of Venus. J. Geophys. Res. 98, 7437-7445]. Our study indicates that on Venus, due to its larger mass and size compared to Mars, the most relevant atmospheric escape processes of oxygen involve ions and are caused by the interaction with the solar wind. The obtained results indicate that the ratio between H/O escape to space from the Venusian upper atmosphere is about 4, and is in a much better agreement with the stoichiometrically H/O escape ratio of 2:1, which is not the case on Mars. However, a detailed analysis of the outflow of ions from the Venus upper atmosphere by the ASPERA-4 and VEX-MAG instruments aboard Venus Express will lead to more accurate atmospheric loss estimations and a better understanding of the planet's water inventory. (c) 2006 Elsevier Ltd. All rights reserved.
Доп.точки доступа:
Lammer, H.; Lichtenegger, H.I.M.; Biernat, H.K.; Erkaev, N.V.; Еркаев, Николай Васильевич; Arshukova, I.L.; Kolb, C.; Gunell, H.; Lukyanov, A.; Holmstrom, M.; Barabash, S.; Zhang, T.L.; Baumjohann, W.
Construction of Confidence Limits for the Probability Density Function on the Basis of Nonparametric Estimation of the Function
[Text] / A. V. Lapko, V. A. Lapko // Meas. Tech. - 2014. - Vol. 56, Is. 12. - P1354-1357, DOI 10.1007/s11018-014-0381-8. - Cited References: 9
. - ISSN 0543-1972. - ISSN 1573-8906
РУБ Engineering, Multidisciplinary + Instruments & Instrumentation
Кл.слова (ненормированные):
probability density function -- confidence limits -- regression estimation -- decomposition of initial data -- nonparametric statistics
Аннотация: A technique for the construction of confidence limits for the probability density function is proposed and its efficiency as a function of the probabilistic characteristics of the procedure of decomposition of the domain of variation of the random variable is investigated.
WOS
Держатели документа:
[Lapko, A. V.] Russian Acad Sci IVM SO RAN, Inst Computat Modeling, Siberian Branch, Krasnoyarsk, Russia
[Lapko, V. A.] Academician Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИВМ СО РАН
Доп.точки доступа:
Lapko, V.A.; Лапко, Василий Александрович; Лапко, Александр Васильевич
Кл.слова (ненормированные):
probability density function -- confidence limits -- regression estimation -- decomposition of initial data -- nonparametric statistics
Аннотация: A technique for the construction of confidence limits for the probability density function is proposed and its efficiency as a function of the probabilistic characteristics of the procedure of decomposition of the domain of variation of the random variable is investigated.
WOS
Держатели документа:
[Lapko, A. V.] Russian Acad Sci IVM SO RAN, Inst Computat Modeling, Siberian Branch, Krasnoyarsk, Russia
[Lapko, V. A.] Academician Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИВМ СО РАН
Доп.точки доступа:
Lapko, V.A.; Лапко, Василий Александрович; Лапко, Александр Васильевич
Effect of data incompleteness on the approximation properties of nonparametric estimation of the two-dimensional probability density of independent random variables
[] / A. V. Lapko, V. A. Lapko // Optoelectron. Instrum. Data Proces. - 2014. - Vol. 50, Is. 1. - P68-74, DOI 10.3103/S8756699014010099
. - ISSN 1934-7944
Кл.слова (ненормированные):
asymptotic properties -- data incompleteness -- independent random variables -- nonparametric estimate -- probability density -- Two dimensional -- Asymptotic properties -- data incompleteness -- Independent random variables -- Non-parametric estimates -- Probability densities -- Random variables
Аннотация: Asymptotic properties of a nonparametric estimate of the two-dimensional probability density of independent random variables are studied. Based on these results, the dependence of its efficiency on data incompleteness in the initial statistical information is determined. © 2014 Allerton Press, Inc.
Scopus
Держатели документа:
Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, building 44, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State Aerospace University, pr. im. Gazety Krasnoyarskii rabochii 31, Krasnoyarsk, 660014, Russian Federation
Доп.точки доступа:
Lapko, V.A.; Лапко, Василий Александрович; Лапко, Александр Васильевич
Кл.слова (ненормированные):
asymptotic properties -- data incompleteness -- independent random variables -- nonparametric estimate -- probability density -- Two dimensional -- Asymptotic properties -- data incompleteness -- Independent random variables -- Non-parametric estimates -- Probability densities -- Random variables
Аннотация: Asymptotic properties of a nonparametric estimate of the two-dimensional probability density of independent random variables are studied. Based on these results, the dependence of its efficiency on data incompleteness in the initial statistical information is determined. © 2014 Allerton Press, Inc.
Scopus
Держатели документа:
Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, building 44, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State Aerospace University, pr. im. Gazety Krasnoyarskii rabochii 31, Krasnoyarsk, 660014, Russian Federation
Доп.точки доступа:
Lapko, V.A.; Лапко, Василий Александрович; Лапко, Александр Васильевич
Method of wellbeing estimation in territory management
/ T. Penkova // Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - 2014. - Vol. 8582 LNCS, Is. PART 4. - P. 57-68, DOI 10.1007/978-3-319-09147-1_5
. -
Кл.слова (ненормированные):
Decision making support -- Territory management -- Wellbeing estimation -- Fuzzy logic -- Semantics -- Decision making support -- Index values -- Semantic interpretation -- Territory managements -- Wellbeing -- Decision making
Аннотация: This paper presents the new technique of territory wellbeing estimation based on creation of a geographically-oriented wellbeing standard and estimation of the territory wellbeing level. The author proposes a method of wellbeing level estimation that provides the calculation of territory wellbeing index taking into account various aspects of vital activity and semantic interpretation of index values using fuzzy logic. The practical result of the work is an implementation of suggested solutions for social monitoring of the territory. © 2014 Springer International Publishing.
Scopus
Держатели документа:
Institute of Computational Modelling SB RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Penkova, T.; Пенькова, Татьяна Геннадьевна
Кл.слова (ненормированные):
Decision making support -- Territory management -- Wellbeing estimation -- Fuzzy logic -- Semantics -- Decision making support -- Index values -- Semantic interpretation -- Territory managements -- Wellbeing -- Decision making
Аннотация: This paper presents the new technique of territory wellbeing estimation based on creation of a geographically-oriented wellbeing standard and estimation of the territory wellbeing level. The author proposes a method of wellbeing level estimation that provides the calculation of territory wellbeing index taking into account various aspects of vital activity and semantic interpretation of index values using fuzzy logic. The practical result of the work is an implementation of suggested solutions for social monitoring of the territory. © 2014 Springer International Publishing.
Scopus
Держатели документа:
Institute of Computational Modelling SB RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Penkova, T.; Пенькова, Татьяна Геннадьевна
The numerical modelling of long wave propagation in the framework of non-linear dispersion models
/ L. B. Chubarov, Yu. I. Shokin // Computers and Fluids. - 1987. - Vol. 15, Is. 3. - P229-249
. - ISSN 0045-7930
Кл.слова (ненормированные):
FLOW OF WATER - Diffusion -- MATHEMATICAL MODELS -- MATHEMATICAL TECHNIQUES - Numerical Methods -- LONG WAVE PROPAGATION -- WATER WAVES
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.
Scopus
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
Кл.слова (ненормированные):
FLOW OF WATER - Diffusion -- MATHEMATICAL MODELS -- MATHEMATICAL TECHNIQUES - Numerical Methods -- LONG WAVE PROPAGATION -- WATER WAVES
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.
Scopus
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
The inverse problem of estimating the parameters of an admixture source in the atmospheric boundary layer
/ V. F. Raputa, A. I. Krylova // Meteorologiya i Gidrologiya. - 1995. - Is. 3. - P49-58
. - ISSN 0130-2906
Кл.слова (ненормированные):
Boundary layers -- Computer simulation -- Contamination -- Diffusion -- Earth atmosphere -- Inverse problems -- Mathematical models -- Numerical methods -- Admixture source -- Impurities
Аннотация: The recovery problem of the power and effective height of an admixture source using the measurement data of the near-earth-surface concentration is considered on the basis of semi-empirical equation solution of turbulent diffusion. A technique is suggested for solution of the inverse problem and numerical construction of the optimal observations plan. There is passed an evaluation test of the suggested models of observations planning and source parameters estimation by using the data of field investigations in the neighbourhood of steam electric power station in Dikkerson. The experimental and recovered source parameters are in satisfactory agreement.
Scopus
Держатели документа:
VTs SO RAN, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Raputa, V.F.; Krylova, A.I.
Кл.слова (ненормированные):
Boundary layers -- Computer simulation -- Contamination -- Diffusion -- Earth atmosphere -- Inverse problems -- Mathematical models -- Numerical methods -- Admixture source -- Impurities
Аннотация: The recovery problem of the power and effective height of an admixture source using the measurement data of the near-earth-surface concentration is considered on the basis of semi-empirical equation solution of turbulent diffusion. A technique is suggested for solution of the inverse problem and numerical construction of the optimal observations plan. There is passed an evaluation test of the suggested models of observations planning and source parameters estimation by using the data of field investigations in the neighbourhood of steam electric power station in Dikkerson. The experimental and recovered source parameters are in satisfactory agreement.
Scopus
Держатели документа:
VTs SO RAN, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Raputa, V.F.; Krylova, A.I.
A posteriori error estimation for partial differential equations
[Text] / B. S. Dobronets // SCIENTIFIC COMPUTING AND VALIDATED NUMERICS. Ser. MATHEMATICAL RESEARCH : AKADEMIE VERLAG GMBH, 1996. - Vol. 90: International Symposium on Scientific Computing, Computer Arithmetic and Validated Numerics SCAN-95 (SEP 26-29, 1995, WUPPERTAL, GERMANY). - P239-244. - Cited References: 0
. - ISBN 0138-3019. - ISBN 3-05-501737-4
РУБ Computer Science, Hardware & Architecture + Mathematics, Applied
WOS
Держатели документа:
RUSSIAN ACAD SCI,CTR COMP,KRASNOYARSK 660036,RUSSIA
ИВМ СО РАН
Доп.точки доступа:
Dobronets, B.S.; Добронец, Борис Станиславович
WOS
Держатели документа:
RUSSIAN ACAD SCI,CTR COMP,KRASNOYARSK 660036,RUSSIA
ИВМ СО РАН
Доп.точки доступа:
Dobronets, B.S.; Добронец, Борис Станиславович
Mechanics
A53
A53
An estimation of reliability of unidirectional composites by catastrophe theory
/ I. I. Koksharov // Mech. Compos. Mater. - 1996. - Vol. 32: IX International Conference on the Mechanics of Composite Materials (OCT, 1995, RIGA, LATVIA), Is. 4. - P374-380, DOI 10.1007/BF02254751. - Cited References: 14
. - ISSN 0191-5665
РУБ Mechanics + Materials Science, Composites + Polymer Science
Аннотация: In the present work, interest is centered on the theory of fracture and practical approaches to reliability estimation of unidirectional composite materials which are based on it. Fracture mechanics is considered not as a theory of macrocracks but as mechanics of fracture mechanisms of the composites with allowance made for probability estimation. A model of composite material with fibers eliminated from the carrying scheme and parameters specific to the stress-strain-damage state (SSDS) was considered. According to the model, during loading, self-accelerated energy rise is accounted for by structural damages growth - the catastrophe takes place. The model allows us to calculate the critical stress. The composites redistribute forces from overloading zones to neighboring ones by microstructural deformations and damages. It is the effect of reservation of carrying ability. Due to this effect, low-value probability of fracture is sufficiently less for the composite than for homogeneous materials. The approach allows us to evaluate the reliability function for Both static loading and fatigue.
WOS,
Scopus
Держатели документа:
Computing Center, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Koksharov, I.I.; Кокшаров, Игорь Ильич
Аннотация: In the present work, interest is centered on the theory of fracture and practical approaches to reliability estimation of unidirectional composite materials which are based on it. Fracture mechanics is considered not as a theory of macrocracks but as mechanics of fracture mechanisms of the composites with allowance made for probability estimation. A model of composite material with fibers eliminated from the carrying scheme and parameters specific to the stress-strain-damage state (SSDS) was considered. According to the model, during loading, self-accelerated energy rise is accounted for by structural damages growth - the catastrophe takes place. The model allows us to calculate the critical stress. The composites redistribute forces from overloading zones to neighboring ones by microstructural deformations and damages. It is the effect of reservation of carrying ability. Due to this effect, low-value probability of fracture is sufficiently less for the composite than for homogeneous materials. The approach allows us to evaluate the reliability function for Both static loading and fatigue.
WOS,
Scopus
Держатели документа:
Computing Center, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Koksharov, I.I.; Кокшаров, Игорь Ильич
Algebraic approach to the analysis of linear static systems with interval uncertainty
[Text] / S. P. Sharyi // J. Comput. Syst. Sci. Int. - 1997. - Vol. 36, Is. 3. - P378-387. - Cited References: 22
. - ISSN 1064-2307
РУБ Computer Science, Artificial Intelligence + Computer Science, Cybernetics + Computer Science, Theory & Methods
Аннотация: This paper deals with mathematical and computational aspects of analysis of a linear static system under conditions of interval uncertainty. In particular, we consider minmax problems of estimating states (inverse minmax problems) under various assumptions on the realization of the system. The notion of alpha beta-solutions of interval equations is introduced as a formalization of the mathematical statement of the problem. The main result of the paper is a new algebraic approach to internal algebraic estimation of alpha beta-solution sets of interval linear equations, whose mathematical basis is the substitution of the initial problem for the problem of finding the algebraic solution of an auxiliary system of equations in extended Kaucher arithmetic. The property of maximality by inclusion of interval solutions of the problem, which are obtained by means of the algebraic approach, is proved.
WOS,
Scopus
Держатели документа:
Computer Center, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Sharyi, S.P.; Шарый С.П.
Аннотация: This paper deals with mathematical and computational aspects of analysis of a linear static system under conditions of interval uncertainty. In particular, we consider minmax problems of estimating states (inverse minmax problems) under various assumptions on the realization of the system. The notion of alpha beta-solutions of interval equations is introduced as a formalization of the mathematical statement of the problem. The main result of the paper is a new algebraic approach to internal algebraic estimation of alpha beta-solution sets of interval linear equations, whose mathematical basis is the substitution of the initial problem for the problem of finding the algebraic solution of an auxiliary system of equations in extended Kaucher arithmetic. The property of maximality by inclusion of interval solutions of the problem, which are obtained by means of the algebraic approach, is proved.
WOS,
Scopus
Держатели документа:
Computer Center, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Sharyi, S.P.; Шарый С.П.
Algebraic approach to the analysis of linear static systems with interval uncertainty
/ S. P. Sharyj // Izvestiya Akademii Nauk. Teoriya i Sistemy Upravleniya. - 1997. - Is. 3. - P51-61
. - ISSN 0002-3388
Кл.слова (ненормированные):
Control theory -- Linear algebra -- Linear control systems -- Parameter estimation -- Set theory -- Static control systems -- Control system analysis
Аннотация: The paper is devoted to mathematical and computer aspects of the static linear system analysis under conditions of interval uncertainty. The main result of the paper is a new algebraic approach to internal estimation of ?? sets of solutions of interval linear equations. The maximality property of inclusion of the interval solutions, obtained by means of the algebraic approach, is proved.
Scopus
Держатели документа:
VTs RAN, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Sharyj, S.P.; Шарый С.П.
Кл.слова (ненормированные):
Control theory -- Linear algebra -- Linear control systems -- Parameter estimation -- Set theory -- Static control systems -- Control system analysis
Аннотация: The paper is devoted to mathematical and computer aspects of the static linear system analysis under conditions of interval uncertainty. The main result of the paper is a new algebraic approach to internal estimation of ?? sets of solutions of interval linear equations. The maximality property of inclusion of the interval solutions, obtained by means of the algebraic approach, is proved.
Scopus
Держатели документа:
VTs RAN, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Sharyj, S.P.; Шарый С.П.
Optimal selection of the number of sampling intervals in domain of variation of a one-dimensional random variable in estimation of the probability density
[Text] / A. V. Lapko, V. A. Lapko // Meas. Tech. - 2013. - Vol. 56, Is. 7. - P. 763-767, DOI 10.1007/s11018-013-0279-x. - Cited References: 7
. - ISSN 0543-1972
РУБ Engineering, Multidisciplinary + Instruments & Instrumentation
Кл.слова (ненормированные):
probability density -- decomposition of initial data -- nonparametric statistic -- regression estimator -- asymptotic properties -- number of sampling intervals
Аннотация: The asymptotic properties of the regression estimator of the probability density, synthesis of which presupposes decomposition of statistical data, are studied. The dependence of the number of sampling intervals on the volume of original data is determined on the study.
WOS
Держатели документа:
[Lapko, A. V.
Lapko, V. A.] Russian Acad Sci IVM SO RAN, Inst Computat Modeling, Siberian Branch, Krasnoyarsk, Russia
ИВМ СО РАН
Доп.точки доступа:
Lapko, V.A.; Лапко, Василий Александрович; Лапко, Александр Васильевич
Кл.слова (ненормированные):
probability density -- decomposition of initial data -- nonparametric statistic -- regression estimator -- asymptotic properties -- number of sampling intervals
Аннотация: The asymptotic properties of the regression estimator of the probability density, synthesis of which presupposes decomposition of statistical data, are studied. The dependence of the number of sampling intervals on the volume of original data is determined on the study.
WOS
Держатели документа:
[Lapko, A. V.
Lapko, V. A.] Russian Acad Sci IVM SO RAN, Inst Computat Modeling, Siberian Branch, Krasnoyarsk, Russia
ИВМ СО РАН
Доп.точки доступа:
Lapko, V.A.; Лапко, Василий Александрович; Лапко, Александр Васильевич
Impact induced surface heating by planetesimals on early Mars
/ T. I. Maindl [et al.] // Astron. Astrophys. - 2015. - Vol. 574, DOI 10.1051/0004-6361/201424256
. - ISSN 0004-6361
Кл.слова (ненормированные):
Celestial mechanics -- Planets and satellites: Atmospheres -- Planets and satellites: Formation -- Planets and satellites: Terrestrial planets -- Stars: Solar-type -- Sun: UV radiation -- Astrophysics -- Atmospheric temperature -- Carbon dioxide -- Energy transfer -- Fluid dynamics -- Hydrodynamics -- Planets -- Upper atmosphere -- Celestial mechanics -- Planets and satellites: atmospheres -- Planets and satellites: formation -- Stars: solar types -- Sun:UV radiation -- Terrestrial planets -- Satellites
Аннотация: Aims. We investigate the influence of impacts of large planetesimals and small planetary embryos on the early Martian surface on the hydrodynamic escape of an early steam atmosphere that is exposed to the high soft X-ray and extreme-ultraviolet (EUV) flux of the young Sun. Methods. Impact statistics in terms of number, masses, velocities, and angles of asteroid impacts onto early Mars are determined via n-body integrations. Based on these statistics, smoothed particle hydrodynamics (SPH) simulations result in estimates of energy transfer into the planetary surface material and the resulting surface heating. For the estimation of the atmospheric escape rates we applied a soft X-ray and EUV absorption model and a 1D upper atmosphere hydrodynamic model to a magma ocean-related catastrophically outgassed steam atmosphere with surface pressure values of 52 bar H2O and 11 bar CO2. Results. The estimated impact rates and energy deposition onto an early Martian surface can account for substantial heating. The energy influx and conversion rate into internal energy is probably sufficient to keep a shallow magma ocean liquid for an extended period of time. Higher surface temperatures keep the outgassed steam atmosphere longer in vapor form and therefore enhance its escape to space within ?0.6 Myr after its formation.
Scopus,
WOS
Держатели документа:
Institute for Computational Modelling, Russian Academy of SciencesKrasnoyarsk 36, Russian Federation
Доп.точки доступа:
Maindl, T.I.; Dvorak, R.; Lammer, H.; Gudel, M.; Schafer, C.; Speith, R.; Odert, P.; Erkaev, N.V.; Еркаев, Николай Васильевич; Kislyakova, K.G.; Pilat-Lohinger, E.
Кл.слова (ненормированные):
Celestial mechanics -- Planets and satellites: Atmospheres -- Planets and satellites: Formation -- Planets and satellites: Terrestrial planets -- Stars: Solar-type -- Sun: UV radiation -- Astrophysics -- Atmospheric temperature -- Carbon dioxide -- Energy transfer -- Fluid dynamics -- Hydrodynamics -- Planets -- Upper atmosphere -- Celestial mechanics -- Planets and satellites: atmospheres -- Planets and satellites: formation -- Stars: solar types -- Sun:UV radiation -- Terrestrial planets -- Satellites
Аннотация: Aims. We investigate the influence of impacts of large planetesimals and small planetary embryos on the early Martian surface on the hydrodynamic escape of an early steam atmosphere that is exposed to the high soft X-ray and extreme-ultraviolet (EUV) flux of the young Sun. Methods. Impact statistics in terms of number, masses, velocities, and angles of asteroid impacts onto early Mars are determined via n-body integrations. Based on these statistics, smoothed particle hydrodynamics (SPH) simulations result in estimates of energy transfer into the planetary surface material and the resulting surface heating. For the estimation of the atmospheric escape rates we applied a soft X-ray and EUV absorption model and a 1D upper atmosphere hydrodynamic model to a magma ocean-related catastrophically outgassed steam atmosphere with surface pressure values of 52 bar H2O and 11 bar CO2. Results. The estimated impact rates and energy deposition onto an early Martian surface can account for substantial heating. The energy influx and conversion rate into internal energy is probably sufficient to keep a shallow magma ocean liquid for an extended period of time. Higher surface temperatures keep the outgassed steam atmosphere longer in vapor form and therefore enhance its escape to space within ?0.6 Myr after its formation.
Scopus,
WOS
Держатели документа:
Institute for Computational Modelling, Russian Academy of SciencesKrasnoyarsk 36, Russian Federation
Доп.точки доступа:
Maindl, T.I.; Dvorak, R.; Lammer, H.; Gudel, M.; Schafer, C.; Speith, R.; Odert, P.; Erkaev, N.V.; Еркаев, Николай Васильевич; Kislyakova, K.G.; Pilat-Lohinger, E.
Spatial distribution of chlorophyll concentration seasonal dynamics types in the ocean based on the autocorrelation analysis of SeaWiFS data
[Text] / A. Shevyrnogov, G. Vysotskaya // Adv. Space Res. - 2006. - Vol. 38, Is. 10. - P. 2176-2181, DOI 10.1016/j.asr.2006.03.034. - Cited References: 26
. - ISSN 0273-1177
РУБ Astronomy & Astrophysics + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences
Аннотация: Seasonal dynamics of phytopigment concentrations in the ocean is one of the key factors indicating the types and intensity of hydrobiological exchange processes in the ocean surface layer. Thanks to the efficient operation of the SeaWiFS equipment for the last 7 years we have managed to carry out statistical analysis of image time series, which is necessary for estimation of reliability of investigations of oscillatory hydrobiological processes on a global scale. Using the autocorrelation method, we revealed a pronounced heterogeneity of the types of seasonal dynamics in the ocean. Statistically significant seasonal dynamics of phytopigment concentrations exists only at 19% of the area of the Global Ocean. On 51% of the area seasonal dynamics is disturbed essentially so, that becomes statistically insignificant and is absent at 30%. The most interesting feature of the pattern obtained was the diversity of the seasonal dynamics of chlorophyll concentration under similar climatic conditions. Another interesting feature of such data presentation is that two types of seasonal dynamics - yearly and half-yearly - were defined. The detected zonality will provide the basis for more efficient development and application of ecological modeling, taking into account real-life hydrobiological and hydrological conditions. (C) 2006 Published by Elsevier Ltd on behalf of COSPAR.
Полный текст
Доп.точки доступа:
Shevyrnogov, A.; Vysotskaya, G.; Высоцкая, Галина Степановна
Рубрики:
EASTERN TROPICAL PACIFIC
NORTH-ATLANTIC
TIME-SERIES
PHYTOPLANKTON
SEA
VARIABILITY
STOCKS
Кл.слова (ненормированные):
chlorophyll -- remote sensing -- dynamic -- season -- ocean
EASTERN TROPICAL PACIFIC
NORTH-ATLANTIC
TIME-SERIES
PHYTOPLANKTON
SEA
VARIABILITY
STOCKS
Кл.слова (ненормированные):
chlorophyll -- remote sensing -- dynamic -- season -- ocean
Аннотация: Seasonal dynamics of phytopigment concentrations in the ocean is one of the key factors indicating the types and intensity of hydrobiological exchange processes in the ocean surface layer. Thanks to the efficient operation of the SeaWiFS equipment for the last 7 years we have managed to carry out statistical analysis of image time series, which is necessary for estimation of reliability of investigations of oscillatory hydrobiological processes on a global scale. Using the autocorrelation method, we revealed a pronounced heterogeneity of the types of seasonal dynamics in the ocean. Statistically significant seasonal dynamics of phytopigment concentrations exists only at 19% of the area of the Global Ocean. On 51% of the area seasonal dynamics is disturbed essentially so, that becomes statistically insignificant and is absent at 30%. The most interesting feature of the pattern obtained was the diversity of the seasonal dynamics of chlorophyll concentration under similar climatic conditions. Another interesting feature of such data presentation is that two types of seasonal dynamics - yearly and half-yearly - were defined. The detected zonality will provide the basis for more efficient development and application of ecological modeling, taking into account real-life hydrobiological and hydrological conditions. (C) 2006 Published by Elsevier Ltd on behalf of COSPAR.
Полный текст
Доп.точки доступа:
Shevyrnogov, A.; Vysotskaya, G.; Высоцкая, Галина Степановна
Analysis of the Properties of the Choice of an Optimal Number of Sampling Intervals in the Domain of Definition of a Probability Density
/ A. V. Lapko, V. A. Lapko // Meas. Tech. - 2014. - Vol. 57, Is. 7. - P740-744, DOI 10.1007/s11018-014-0529-6
. - ISSN 0543-1972
Кл.слова (ненормированные):
antikurtosis -- asymmetry coefficient -- kurtosis -- nonparametric estimation -- probability density -- sampling procedure -- Probability -- Statistical methods -- antikurtosis -- asymmetry coefficient -- kurtosis -- Non-parametric estimations -- Probability densities -- Sampling procedures -- Probability density function
Аннотация: The choice of an optimal number of sampling intervals in the domain of definition of the probability density is studied as a function of the antikurtosis coefficient. Quantitative relationships between the sampling coefficient and the antikurtosis are found for symmetric and nonsymmetric distributions. Their features are analyzed for different utilization conditions. © 2014, Springer Science+Business Media New York.
Scopus
Держатели документа:
Institute of Computational Modelling, Siberian Branch of the Russian Academy of SciencesKrasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace UniversityKrasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Lapko, A.V.; Лапко, Александр Васильевич; Lapko, V.A.; Лапко, Василий Александрович
Кл.слова (ненормированные):
antikurtosis -- asymmetry coefficient -- kurtosis -- nonparametric estimation -- probability density -- sampling procedure -- Probability -- Statistical methods -- antikurtosis -- asymmetry coefficient -- kurtosis -- Non-parametric estimations -- Probability densities -- Sampling procedures -- Probability density function
Аннотация: The choice of an optimal number of sampling intervals in the domain of definition of the probability density is studied as a function of the antikurtosis coefficient. Quantitative relationships between the sampling coefficient and the antikurtosis are found for symmetric and nonsymmetric distributions. Their features are analyzed for different utilization conditions. © 2014, Springer Science+Business Media New York.
Scopus
Держатели документа:
Institute of Computational Modelling, Siberian Branch of the Russian Academy of SciencesKrasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace UniversityKrasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Lapko, A.V.; Лапко, Александр Васильевич; Lapko, V.A.; Лапко, Василий Александрович
Use geoinformation technologies for emergency risk estimation on water objects of Siberia
[Text] / V. V. Nicheporchuk, Chernyakova N.A. // Zbornik radova konferencije MIT 2013. - Beograd : Uiverziteta u Pristini, 2014. - P471-478
. - ISBN 978-86-80795-20-1
Полный текст в сборнике трудов конференции,
Полный текст
Доп.точки доступа:
Chernyakova, N.A.; Ничепорчук, Валерий Васильевич
Полный текст в сборнике трудов конференции,
Полный текст
Доп.точки доступа:
Chernyakova, N.A.; Ничепорчук, Валерий Васильевич
Nonparametric method of a confidential estimation of a probability density
/ A. V. Lapko, V. A. Lapko // 2015 International Siberian Conference on Control and Communications, SIBCON 2015 - Proceedings. - 2015. - 2015 International Siberian Conference on Control and Communications, SIBCON 2015 (21 May 2015 through 23 May 2015, ) Conference code: 113590, DOI 10.1109/SIBCON.2015.7147119
. -
Кл.слова (ненормированные):
confidence limits -- decomposition of initial data -- Freedman-Diaconis rule -- Heinhold-Gaede rule -- nonparametric estimation -- nonparametric statistics -- probability density function -- Scott's rule -- Probability -- Confidence limit -- Freedman-Diaconis rule -- Heinhold-Gaede rule -- Non-parametric estimations -- Non-parametric statistics -- Scott's rule -- Probability density function
Аннотация: A technique for the construction of confidence limits for the multi-dimensional probability density function is proposed and its efficiency as a function of the probabilistic characteristics of the procedure of decomposition of the domain of variation of the random variable is investigated. © 2015 IEEE.
Scopus
Держатели документа:
Siberian Branch of the Russian Academy of Sciences, Institute of Computer Modelling, Krasnoyarsk, Russian Federation
Ministry of Education and Science of the Russian Federation, Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Lapko, V.A.; Лапко, Василий Александрович; Лапко, Александр Васильевич
Кл.слова (ненормированные):
confidence limits -- decomposition of initial data -- Freedman-Diaconis rule -- Heinhold-Gaede rule -- nonparametric estimation -- nonparametric statistics -- probability density function -- Scott's rule -- Probability -- Confidence limit -- Freedman-Diaconis rule -- Heinhold-Gaede rule -- Non-parametric estimations -- Non-parametric statistics -- Scott's rule -- Probability density function
Аннотация: A technique for the construction of confidence limits for the multi-dimensional probability density function is proposed and its efficiency as a function of the probabilistic characteristics of the procedure of decomposition of the domain of variation of the random variable is investigated. © 2015 IEEE.
Scopus
Держатели документа:
Siberian Branch of the Russian Academy of Sciences, Institute of Computer Modelling, Krasnoyarsk, Russian Federation
Ministry of Education and Science of the Russian Federation, Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Lapko, V.A.; Лапко, Василий Александрович; Лапко, Александр Васильевич
Decision making support technique based on territory wellbeing estimation
/ T. Penkova // Smart Innovation, Systems and Technologies . - 2015. - Vol. 39: 7th KES International Conference on Intelligent Decision Technologies, KES-IDT 2015; Sorrento; Italy; 17 June 2015 through 19 June 2015; Code 153079. - P513-523, DOI 10.1007/978-3-319-19857-6_44
. -
Кл.слова (ненормированные):
Control recommendations -- Decision making support -- Territory management -- Wellbeing estimation -- Control actions -- Decision making support -- Territory managements -- Wellbeing -- Decision making
Аннотация: This paper presents the technique of comprehensive decision making support in territory management based on estimation of current state of the territory and formation of control actions. In order to provide the decision preparation support the author proposes a method of wellbeing level estimation that allows to calculate a wellbeing index taking into account various aspects of vital activity. In order to provide the intellectual support of decision formation the author comes up with a model of generation of the control recommendations. © Springer International Publishing Switzerland 2015.
Scopus,
WOS,
Смотреть статью
Держатели документа:
Institute of Computational Modelling SB RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Пенькова, Татьяна Геннадьевна
Кл.слова (ненормированные):
Control recommendations -- Decision making support -- Territory management -- Wellbeing estimation -- Control actions -- Decision making support -- Territory managements -- Wellbeing -- Decision making
Аннотация: This paper presents the technique of comprehensive decision making support in territory management based on estimation of current state of the territory and formation of control actions. In order to provide the decision preparation support the author proposes a method of wellbeing level estimation that allows to calculate a wellbeing index taking into account various aspects of vital activity. In order to provide the intellectual support of decision formation the author comes up with a model of generation of the control recommendations. © Springer International Publishing Switzerland 2015.
Scopus,
WOS,
Смотреть статью
Держатели документа:
Institute of Computational Modelling SB RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Пенькова, Татьяна Геннадьевна