Труды сотрудников ИВМ СО РАН

[Text] / N.I. Kosarev, N.Y. Shaparev // J. Phys. B-At. Mol. Opt. Phys. - 2011. - Vol. 44, Is. 19. - Ст. 195402, DOI 10.1088/0953-4075/44/19/195402. - Cited References: 17 . - ISSN 0953-4075РУБ Optics + Physics, Atomic, Molecular & Chemical

Аннотация: Imprisonment of resonant radiation in an expanding sphere on the basis of the numerical solution of the rate balance equation for excited atoms and the transfer resonance radiation equation is investigated. Calculations of the escape factor for sphere at Doppler form of absorption and scattering profiles are executed. The effect of spectral shift of the absorption (emission) profile relative to the stationary one due to expansion of the medium is taken into account for the case when differential motion is described by velocity that varies linearly with the radius. The behaviour of the escape factor for the sphere is compared with the Sobolev theory. The numerical date for time dependence of intensity of afterglow and contour of the spectral line of leaving outside resonance radiation and spatial distribution of the excited atomic concentration are submitted as well.


Доп.точки доступа:
Shaparev, N.Ya.; Шапарев, Николай Якимович; Косарев Н.И.

[Текст] : статья / K. A. Kourshakova, M. Yu. Senashova // Journal of Siberian Federal University. Mathematics & Physics = Журнал Сибирского федерального университета. Математика и физика. - 2008. - Т. 1, № 3. - С. 284-289
Аннотация: A population changes model of spatial distributed two-species consocietum is considered. Species react as a "predator-prey" system. Each species occupies two states. Migrations lead to the problem of a net reproduction maximization. The basic model and its three reflexive modifications are considered.

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Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44

Доп.точки доступа:
Senashova, M.Yu.; Сенашова, Мария Юрьевна

[Text] / C. J. FARRUGIA [et al.] ; ed. H. K. BIERNAT // MAGNETOSHEATH. Ser. ADVANCES IN SPACE RESEARCH : PERGAMON PRESS LTD, 1994. - Vol. 14: Topical Meeting of the COSPAR Interdisciplinary Scientific Commission D of the COSPAR 29th Plenary Meeting (AUG 28-SEP 05, 1992, WASHINGTON, DC), Is. 7. - P105-110, DOI 10.1016/0273-1177(94)90055-8. - Cited References: 15 . - ISBN 0273-1177. - ISBN 0-08-042484-8РУБ Engineering, Aerospace + Astronomy & Astrophysics + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences

Аннотация: We present magnetic field and particle (protons and electrons) observations in the sheath region behind an interplanetary shock driven by a magnetic cloud, and in the magnetic cloud itself. We also discuss observations in the dayside terrestrial magnetosheath during cloud passage. We find that the region ahead of the cloud is in pressure balance. Further, throughout its extent ( 0.06 AU), the magnetic field strength is anticorrelated with the plasma density, with the latter decreasing steadily as the cloud is approached. This behaviour is indicative of magnetic forces influencing the Row topology and highlights a large-scale breakdown of predictions based solely on gas dynamical considerations. We also study density stuctures inside the cloud which result in an undulating dynamic pressure being applied to the magnetopause causing it to oscillate with amplitudes of similar to 1 similar to 3 Re and period similar to 2h.


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FARRUGIA, C.J.; FITZENREITER, R.J.; BURLAGA, L.F.; Erkaev, N.V.; Еркаев, Николай Васильевич; OSHEROVICH, V.A.; BIERNAT, H.K.; FAZAKERLEY, A.; BIERNAT, H.K. \ed.\

[Text] / A. V. Kitaev // PROBLEMS OF GEOSPACE : VERLAG OSTERREICHISCHEN AKAD WISSENSCHAFTEN, 1997. - International Conference on Problems of Geocosmos (JUN 17-23, 1996, PETRODVORETS, RUSSIA). - P101-106. - Cited References: 10 . - ISBN 3-7001-2676-XРУБ Astronomy & Astrophysics + Geochemistry & Geophysics + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences

Аннотация: Mathematical models of a fully closed magnetospheric magnetic field and of a diffusive magnetopause are combined to calculate the electric field and the field-aligned currents in the dayside cusp region of the ionosphere. The electric potential at the magnetopause resulting from magnetic field diffusion is mapped into the ionosphere and then used to calculate the field-aligned currents in the ionosphere. The obtained field-aligned current system includes region 1 located along the equatorial boundary of the cusp, and region 3 located by 1-2 degrees poleward. The region 1 in the model corresponds to the frontside of the magnetospheric boundary whereas the region 3 is coupled with the magnetopause in the magnetotail. Region 3 currents are shown to be due to the electric potential magnitude decreasing in the antisolar direction. Such a behaviour of the electric potential looks natural for all other possible electric held generation mechanisms at the magnetopause and, therefore, it is reasonable to expect them to generate region 3 field aligned currents.

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Держатели документа:
Russian Acad Sci, Ctr Comp, Krasnoyarsk 660036, Russia
ИВМ СО РАН

Доп.точки доступа:
Kitaev, A.V.; Китаев, Анатолий Валерьевич

[Text] / N. V. Erkaev [et al.] // Mon. Not. Roy. Astron. Soc. - 2015. - Vol. 448, Is. 2. - P1916-1921, DOI 10.1093/mnras/stv130. - Cited References:28. - The authors acknowledge the support by the FWF NFN project S11601-N16 'Pathways to Habitability: From Disks to Active Stars, Planets and Life', and the related FWF NFN subproject, S11607-N16 'Particle/Radiative Interactions with Upper Atmospheres of Planetary Bodies Under Extreme Stellar Conditions'. PO acknowledges support from the FWF project P22950-N16. NVE acknowledges support by the RFBR grant no. 15-05-00879-a. Finally, the authors thank the International Space Science Institute (ISSI) in Bern, and the ISSI team 'Characterizing stellar-and exoplanetary environments'. . - ISSN 0035-8711. - ISSN 1365-2966РУБ Astronomy & Astrophysics

Аннотация: By considering martian-like planetary embryos inside the habitable zone of solar-like stars we study the behaviour of the hydrodynamic atmospheric escape of hydrogen for small values of the Jeans escape parameter beta < 3, near the base of the thermosphere, that is defined as a ratio of the gravitational and thermal energy. Our study is based on a 1D hydrodynamic upper atmosphere model that calculates the volume heating rate in a hydrogen-dominated thermosphere due to the absorption of the stellar soft X-ray and extreme ultraviolet (XUV) flux. In case of a monatomic gas, we find that when the beta value near the mesopause/homopause level exceeds a critical value of similar to 2.5, there exists a steady hydrodynamic solution with a smooth transition from subsonic to supersonic flow. For a fixed XUV flux, the escape rate of the upper atmosphere is an increasing function of the temperature at the lower boundary. Our model results indicate a crucial enhancement of the atmospheric escape rate, when the Jeans escape parameter beta decreases to this critical value. When beta becomes <= 2.5, there is no stationary hydrodynamic transition from subsonic to supersonic flow. This is the case of a fast non-stationary atmospheric expansion that results in extreme thermal atmospheric escape rates.

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Держатели документа:
Inst Computat Modelling SB RAS, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria.
Graz Univ, Inst Phys, A-8010 Graz, Austria.
Russian Acad Sci, Polar Geophys Inst, Murmansk 183010, Russia.
ИВМ СО РАН

Доп.точки доступа:
Erkaev, N.V.; Еркаев, Николай Васильевич; Lammer, H.; Odert, P.; Kulikov, Yu. N.; Kislyakova, K.G.; FWF NFN [S11601-N16, S11607-N16]; FWF [P22950-N16]; RFBR [15-05-00879-a]

/ M. G. Sadovsky, M. Y. Senashova // J. Sib. Fed. Univ. Math. Phys. - 2015. - Vol. 8, Is. 3. - P340-342, DOI 10.17516/1997-1397-2015-8-3-340-342 . - ISSN 1997-1397
Аннотация: Comparison of reflexive vs. non-reflexive behaviour is provided, for the dynamics of globally informed beings in a community with optimal migration. © Siberian Federal University. All rights reserved.

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Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok, 50/44, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sadovsky, M.G.; Садовский, Михаил Георгиевич; Senashova, M.Yu.; Сенашова, Мария Юрьевна

[Text] / M. Sadovsky, M. Senashova // Bull. Math. Biol. - 2016. - Vol. 78, Is. 4. - P736-753, DOI 10.1007/s11538-016-0159-z. - Cited References:58 . - ISSN 0092-8240. - ISSN 1522-9602РУБ Biology + Mathematical & Computational Biology

Аннотация: We consider the model of spatially distributed community consisting of two species with "predator-prey" interaction; each of the species occupies two stations. Transfer of individuals between the stations (migration) is not random, and migration stipulates the maximization of net reproduction of each species. The spatial distribution pattern is provided by discrete stations, and the dynamics runs in discrete time. For each time moment, firstly a redistribution of individuals between the stations is carried out to maximize the net reproduction, and then the reproduction takes place, with the upgraded abundances. Besides, three versions of the basic model are implemented where each species implements reflexive behaviour strategy to determine the optimal migration flow. It was found that reflexivity gives an advantage to the species realizing such strategy, for some specific sets of parameters. Nevertheless, the regular scanning of the parameters area shows that non-reflexive behaviour yields an advantage in the great majority of parameters combinations.

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Inst Computat Modelling SB RAS, Krasnoyarsk, Russia.

Доп.точки доступа:
Sadovsky, Michael; Senashova, Mariya

/ M. Sadovsky [et al.] // Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - 2016. - Vol. 9656: 4th International Work-Conference on Bioinformatics and Biomedical Engineering, IWBBIO 2016; Granada; Spain; 20 April 2016 through 22 April 2016; Code 173369. - P505-514, DOI 10.1007/978-3-319-31744-1_45 . -
Аннотация: We studied the model to figure out the factors that may affect and retard the development of Alzheimer’s disease. The experimental rats have been kept in two kinds of environment: standard one vs. enriched one, and amiloid protein has been injected to both groups of rats to simulate Alzheimer’s disease. It is found the enriched environment is the key factor to retard the development of neurodegenerative disorder. © Springer International Publishing Switzerland 2016.

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Держатели документа:
Institute of Computational Modelling of SB RAS, Akademgorodok, Krasnoyarsk, Russian Federation
Krasnoyarsk State Medical University, p. Zheleznyaka str., 1, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sadovsky, M.; Morgun, A.; Salmina, A.; Kuvacheva, N.; Khilazheva, E.; Pozhilenkova, E.

/ V. Andreev // CEUR Workshop Proceedings : CEUR-WS, 2017. - Vol. 1839: 2016 International Conference Mathematical and Information Technologies, MIT 2016 (28 August 2016 through 5 September 2016, ) Conference code: 127940. - P258-270 . -
Аннотация: The new partially invariant solution of two-dimential motions of heated viscous liquid equations is considered. For factor-system arised the initial boundary value problem is formulated. This problem is inverse one and describing of common motion of two immiscible liquids in a plane channel under the action of thermocapillary forces. As Marangoni number is small (so-called creeping flow) the problem becomes the linear one. Some a priori estimates are obtained and input data conditions when solution tends to stationary one are found. In Laplace transforms the exact solution is obtained as quadratures and some numerical results of velocities behavior in layers are presented.

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Держатели документа:
Institute Computational Modelling SB RAS, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Andreev, V.

[Текст] : доклад, тезисы доклада / В. К. Андреев // Некоторые актуальные проблемы современной математики и математического образования : материалы научной конференции. - Санкт-Петербург, 2017. - С. 20-25 . - ISBN 978-5-8064-2234-8

УДК

517.9

Аннотация: Изучается задача о ползущем движении вязкой теплопроводной жидкости в сферическом слое. Внутренний твёрдый шар и внешняя сфера вращаются с разными угловыми скоростями, причём в шаре имеются неоднородные источники тепла. Найдено стационарное течение жидкости в рамках модели Обербека - Буссинеска. При этом для температурных полей решена сопряжённая начально-краевая задача. Указаны условия на входные данные, при которых решение с ростом времени выходит на стационарный режим. Приведены примеры расчёта стационарных течений, возникающих в меридиональных сечениях.
The problem of a slowly flow of viscous heat conduction fluid in spherical rotating layer is investigated. The interior solid sphere and exterior sphere are rotating with a different angular velocities, moreover into solid ball there are nonhomogeneity heat sources. Some new exact solutions are found. For the temperature fields the conjugate initial boundary value problem is solved. A priori estimates are obtained and input data conditions when solution tends to stationary one are found. Some numerical results of velocities behaviour in meridional sections are presented.

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Держатели документа:
Институт вычислительного моделирования СО РАН - обособленное подразделение Сибирского отделения Российской академии наук

Доп.точки доступа:
Андреев, В.К.; Герценовские чтения - 2017(2017 ; 10.04 - 14.04 ; Санкт-Петербург)
Нет сведений об экземплярах (Источник в БД не найден)

/ T. Penkova, A. Korobko // (1 July 2019 through 4 July 2019 : Springer Verlag, 2019. - Vol. 11619 LNCS. - P434-446, DOI 10.1007/978-3-030-24289-3_32 . -
Аннотация: The software and hardware level used for on-line monitoring of the hydropower equipment functioning parameters as well as the large amounts of stored data create the necessary conditions for application of innovative methods and technologies of data analysis in the tasks of analytical assessment of equipment condition. This paper presents the results of detecting the operational patterns of the hydraulic unit in various modes and functioning conditions based on the data mining techniques – principal component analysis and cluster analysis – applied to the monitoring data of the vibration control system. In multidimensional data space, two principal components have been selected and interpreted taking into account the contribution of the data attributes to the principal components. On the plane of the first two principal components, a five-cluster structure has been constructed to define the moments of time when the system demonstrates a characteristic behaviour. In addition, the monitored parameters have been analysed in terms of time series at characteristic moments of time. As a result, the comprehensive multidimensional analysis of monitoring data has allowed us to discover the hydraulic unit operation patterns and dependencies, determine the character of the influence induced by its constructive elements and work out the ratio between the ranges of key parameters in various modes of equipment operation. © 2019, Springer Nature Switzerland AG.

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Держатели документа:
Institute of Computational Modelling, Siberian Branch of the Russian Academy of Sciences, 50/44 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Penkova, T.; Korobko, A.

/ V. V. Nicheporchuk, T. G. Penkova, I. V. Gryazin // 2019 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019 - Proceedings : Institute of Electrical and Electronics Engineers Inc., 2019. - 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019 (20 May 2019 through 24 May 2019, ) Conference code: 149393. - Ст. 8757137. - P1244-1249, DOI 10.23919/MIPRO.2019.8757137 . -
Аннотация: Monitoring of animals in the wild using camera traps is one of the promising ways for monitoring animal behaviour and estimation of dynamic of changes in natural systems over the large areas. The installation of camera traps in a predefined place such as animal shelters, trails, watering places provides unique information that is not available by applying other monitoring methods. Present, a lot of methods and algorithms have been developed that allow us to recognize the natural images taking into account the variability of shooting conditions, illumination, location and posture of the animal, as well as a complex textural background, representing various states of the forest, steppe, mountain and tundra landscapes. This paper presents the results of analysis and systematization of monitoring data from images obtained on the protected natural territories in the Krasnoyarsk region. The authors propose the special structure of a centralized data warehouse for an intelligent ecosystem monitoring system. The structure of the data warehouse combines historical, operational and reference data. The content of structural elements of the data warehouse is described in detail. The developed data warehouse combines monitoring data from different sources and makes up a united informational resource for further data processing and solving analytical tasks of environmental monitoring. © 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019 - Proceedings. All rights reserved.

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Держатели документа:
Institute of computation modelling of the, Siberian Branch of the, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
“Ergaki” Nature Park, Krasnoyarsk region, Russian Federation

Доп.точки доступа:
Nicheporchuk, V. V.; Penkova, T. G.; Gryazin, I. V.

/ V. V. Nicheporchuk, T. G. Penkova, I. V. Gryazin ; ed. M. . Koricic [et al.] // 2019 42ND INTERNATIONAL CONVENTION ON INFORMATION AND COMMUNICATION : IEEE, 2019. - 42nd International Convention on Information and Communication (MAY 20-24, 2019, Opatija, CROATIA). - P1244-1249. - Cited References:21. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project No. 18-47-240001. . - ISBN 978-953-233-098-4РУБ Engineering, Electrical & Electronic + Telecommunications

Аннотация: Monitoring of animals in the wild using camera traps is one of the promising ways for monitoring animal behaviour and estimation of dynamic of changes in natural systems over the large areas. The installation of camera traps in a predefined place such as animal shelters, trails, watering places provides unique information that is not available by applying other monitoring methods. Present, a lot of methods and algorithms have been developed that allow us to recognize the natural images taking into account the variability of shooting conditions, illumination, location and posture of the animal, as well as a complex textural background, representing various states of the forest, steppe, mountain and tundra landscapes. This paper presents the results of analysis and systematization of monitoring data from images obtained on the protected natural territories in the Krasnoyarsk region. The authors propose the special structure of a centralized data warehouse for an intelligent ecosystem monitoring system. The structure of the data warehouse combines historical, operational and reference data. The content of structural elements of the data warehouse is described in detail. The developed data warehouse combines monitoring data from different sources and makes up a united informational resource for further data processing and solving analytical tasks of environmental monitoring.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Computat Modelling, Krasnoyarsk, Russia.
Ergaki Nat Pk, Krasnoyarsk, Krasnoyarsk Reg, Russia.

Доп.точки доступа:
Nicheporchuk, V. V.; Penkova, T. G.; Gryazin, I. V.; Koricic, M... \ed.\; Butkovic, Z... \ed.\; Skala, K... \ed.\; Car, Z... \ed.\; CicinSain, M... \ed.\; Babic, S... \ed.\; Sruk, V... \ed.\; Skvorc, D... \ed.\; Ribaric, S... \ed.\; Gros, S... \ed.\; Vrdoljak, B... \ed.\; Mauher, M... \ed.\; Tijan, E... \ed.\; Pale, P... \ed.\; Huljenic, D... \ed.\; Grbac, T.G. \ed.\; Janjic, M... \ed.\; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-47-240001]