[Electronic resource]. - Electronic data (640 Kb)
. - Режим доступа: http://icm.krasn.ru/refextra.php?id=2109. - Электрон. версия печ. публикации . - Режим доступа: http://www.wkap.nl/prod/b/0-306-47401-8 : научное издание / A.N. Gorban, I.V. Karlin. - Electronic data (640 Kb) // Recent Developments in Mathematical and Experimental Physics, Volume C: Hydrodynamics and Dynamical Systems. - Dordrecht : Kluwer, 2002. - p. 19-43
Перевод заглавия: Геометрия необратимости
Аннотация: A general geometrical setting of nonequilibrium thermodynamics is developed. The approach is based on the notion of the natural projection which generalizes Ehrenfests' coarse-graining. It is demonstrated how derivations of irreversible macroscopic dynamics from the microscopic theories can be addressed through a study of stability of quasiequilibrium manifolds.
http://icm.krasn.ru/refextra.php?id=2109,
http://www.wkap.nl/prod/b/0-306-47401-8
Доп.точки доступа:
Karlin, I.V.; Карлин, Илья Вениаминович; Горбань, Александр Николаевич
Труды сотрудников ИВМ СО РАН
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Найдено документов в текущей БД: 32
Application of the B-Determining Equations Method to One Problem of Free Turbulence
[Text] : статья / O.V. Kaptsov, A.V. Schmidt // Symmetry Integr.Geom. Methods Appl. - 2012. - Vol. 8. - Ст. 073DOI 10.3842/SIGMA.2012.073
. -
Полный текст
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Schmidt, A.V.; Шмидт, Алексей Владимирович; Капцов, Олег Викторович
Полный текст
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Schmidt, A.V.; Шмидт, Алексей Владимирович; Капцов, Олег Викторович
On Influencing of a Space Geometry on Dynamics of Some CA Pedestrian Movement Model
[Text] / E.Kirik, T.Yurgel'yan, D.Krouglov // CELLULAR AUTOMATA. Ser. Lecture Notes in Computer Science : SPRINGER-VERLAG BERLIN, 2010. - Vol. 6350: 9th International Conference on Cellular Automata for Research and Industry (SEP 21-24, 2010, Ascoli Piceno, ITALY). - pp. 474-479. - Cited References: 3
. - ISBN 0302-9743. - ISBN 978-3-642-15978-7
РУБ Computer Science, Information Systems + Computer Science, Theory & Methods + Telecommunications
Аннотация: In this paper we show an effect that a shape of way contributes to dynamics of one Cellular Automata pedestrian movement model. The fundamental diagrams for a closed and strait pathes are presented and discussed.
Доп.точки доступа:
Kirik, E.; Кирик, Екатерина Сергеевна; Yurgelyan, T.; Krouglov, D.
Аннотация: In this paper we show an effect that a shape of way contributes to dynamics of one Cellular Automata pedestrian movement model. The fundamental diagrams for a closed and strait pathes are presented and discussed.
Доп.точки доступа:
Kirik, E.; Кирик, Екатерина Сергеевна; Yurgelyan, T.; Krouglov, D.
A slow mode transition region adjoining the front boundary of a magnetic cloud as a relic of a convected solar wind feature: Observations and MHD simulation
[Text] / C. J. Farrugia [et al.] // J. Geophys. Res-Space Phys. - 2008. - Vol. 113. - Ст. A00B01, DOI 10.1029/2007JA012953. - Cited References: 38
. - ISSN 0148-0227
РУБ Astronomy & Astrophysics
Аннотация: We identify a planar, pressure-balanced structure bounded by sharp changes in the dynamic pressure plastered against the front boundary of the magnetic cloud which passed Earth on 20 November 2003. The front boundary of the magnetic cloud (MC) is particularly well-defined in this case, being located where the He(++)/H(+) number density ratio jumps from 4 to 10% for the first time and the proton plasma beta decreases sharply from similar to 1 to similar to 0.001. The feature, estimated to have a length scale similar to 50 RE in the Sun-Earth direction, bears close resemblance to a slow mode transition region in that the magnetic pressure decreases, the plasma pressure increases, and their temporal variations are anticorrelated. Using a 2-D MHD simulation, we hypothesize that a pressure-balanced structure was encountered by the MC en route to Earth. Our calculations reproduce qualitatively the major features of the observations. Using a simplified geometry suggested by the observations, we find that the lateral deflection speed of the plasma is less than the lateral expansion speed of the MC. We infer that the structure traversed the MC sheath in similar to 20 h, consistent with its crossing of the MC's shock at 0.6-0.7 AU. The finding is consistent with the recent paradigm according to which solar wind plasma and magnetic field tend to pile up in front of interplanetary ejecta because the expansion of the ejecta hinders the shocked solar wind plasma from deflecting effectively around the object. Also, the inferred "age'' of the layer contiguous to the surface of the MC, the earliest relic of its passage through the inner heliosphere, is in agreement with general estimates.
Доп.точки доступа:
Farrugia, C.J.; Erkaev, N.V.; Еркаев, Николай Васильевич; Taubenschuss, U.; Shaidurov, V.A.; Smith, C.W.; Biernat, H.K.
Аннотация: We identify a planar, pressure-balanced structure bounded by sharp changes in the dynamic pressure plastered against the front boundary of the magnetic cloud which passed Earth on 20 November 2003. The front boundary of the magnetic cloud (MC) is particularly well-defined in this case, being located where the He(++)/H(+) number density ratio jumps from 4 to 10% for the first time and the proton plasma beta decreases sharply from similar to 1 to similar to 0.001. The feature, estimated to have a length scale similar to 50 RE in the Sun-Earth direction, bears close resemblance to a slow mode transition region in that the magnetic pressure decreases, the plasma pressure increases, and their temporal variations are anticorrelated. Using a 2-D MHD simulation, we hypothesize that a pressure-balanced structure was encountered by the MC en route to Earth. Our calculations reproduce qualitatively the major features of the observations. Using a simplified geometry suggested by the observations, we find that the lateral deflection speed of the plasma is less than the lateral expansion speed of the MC. We infer that the structure traversed the MC sheath in similar to 20 h, consistent with its crossing of the MC's shock at 0.6-0.7 AU. The finding is consistent with the recent paradigm according to which solar wind plasma and magnetic field tend to pile up in front of interplanetary ejecta because the expansion of the ejecta hinders the shocked solar wind plasma from deflecting effectively around the object. Also, the inferred "age'' of the layer contiguous to the surface of the MC, the earliest relic of its passage through the inner heliosphere, is in agreement with general estimates.
Доп.точки доступа:
Farrugia, C.J.; Erkaev, N.V.; Еркаев, Николай Васильевич; Taubenschuss, U.; Shaidurov, V.A.; Smith, C.W.; Biernat, H.K.
On the dependence of dayside Kelvin-Helmholtz activity on IMF orientation
[Text] / C. J. Farrugia [et al.] // SPACE WEATHER 2000. Ser. ADVANCES IN SPACE RESEARCH-SERIES : PERGAMON-ELSEVIER SCIENCE LTD, 2003. - Vol. 31: PSW1/C0 1/D0 5/E2 5/F2 0 Symposium of the COSPAR Scientific Panel on Space Weather held at the 33rd COSPAR Scientific Assembly (JUL, 2000, WARSAW, POLAND), Is. 4. - P1105-1110, DOI 10.1016/S0273-1177(02)00889-X. - Cited References: 16
. - ISBN 0273-1177
РУБ Engineering, Aerospace + Astronomy & Astrophysics + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences
Аннотация: With its similar to12 h-long period of strongly northward magnetic field, the coronal mass ejection which passed Earth on April 11, 1997 affords an excellent opportunity of studying Kelvin-Helmholtz (KH) activity at the dayside magnetopause as a function of the clock angle, theta, of the interplanetary field (IMF). A correlation between the wavelength of the KH waves and theta may be expected on the basis of our recent model, where activity is generated in strips which broaden as theta decreases. We identify two 2-hour long intervals of small, but different, clock angles, and make a preliminary test of model predictions, using records from two ground magnetometer chains, both on the dayside. Taking into account the local time of the magnetometer arrays and the geometry of the KH-active strips, we show that the resonant stations measured considerably more spectral power density in the 3-4 mHz range during the phase with smaller theta. Moreover, as theta increases, the spectral power spectrum shifted to higher frequencies that were almost absent for smaller theta. (C) 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
Доп.точки доступа:
Farrugia, C.J.; Gratton, F.T.; Torbert, R.B.; Bender, L.; Gnavi, G.; Ogilvie, K.W.; Erkaev, N.V.; Еркаев, Николай Васильевич; Lepping, R.P.; Stauning, P.
Аннотация: With its similar to12 h-long period of strongly northward magnetic field, the coronal mass ejection which passed Earth on April 11, 1997 affords an excellent opportunity of studying Kelvin-Helmholtz (KH) activity at the dayside magnetopause as a function of the clock angle, theta, of the interplanetary field (IMF). A correlation between the wavelength of the KH waves and theta may be expected on the basis of our recent model, where activity is generated in strips which broaden as theta decreases. We identify two 2-hour long intervals of small, but different, clock angles, and make a preliminary test of model predictions, using records from two ground magnetometer chains, both on the dayside. Taking into account the local time of the magnetometer arrays and the geometry of the KH-active strips, we show that the resonant stations measured considerably more spectral power density in the 3-4 mHz range during the phase with smaller theta. Moreover, as theta increases, the spectral power spectrum shifted to higher frequencies that were almost absent for smaller theta. (C) 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
Доп.точки доступа:
Farrugia, C.J.; Gratton, F.T.; Torbert, R.B.; Bender, L.; Gnavi, G.; Ogilvie, K.W.; Erkaev, N.V.; Еркаев, Николай Васильевич; Lepping, R.P.; Stauning, P.
Hydrodynamics beyond Navier-Stokes: The slip flow model
[Text] : статья / W. P. Yudistiawan, S. Ansumali, I. V. Karlin // Physical review E. - 2008. - Vol. 78. - Ст. 016705, DOI 10.1103/PhysRevE.78.016705
. - ISSN 1539-3755
Аннотация: Recently, analytical solutions for the nonlinear Couette flow demonstrated the relevance of the lattice Boltzmann (LB) models to hydrodynamics beyond the continuum limit [S. Ansumali et al., Phys. Rev. Lett. 98, 124502 (2007)]. In this paper, we present a systematic study of the simplest LB kinetic equation—the nine-bit model in two dimensions—in order to quantify it as a slip flow approximation. Details of the aforementioned analytical solution are presented, and results are extended to include a general shear- and force-driven unidirectional flow in confined geometry. Exact solutions for the velocity, as well as for pertinent higher-order moments of the distribution functions, are obtained in both Couette and Poiseuille steady-state flows for all values of rarefaction parameter (Knudsen number). Results are compared with the slip flow solution by Cercignani, and a good quantitative agreement is found for both flow situations. Thus, the standard nine-bit LB model is characterized as a valid and self-consistent slip flow model for simulations beyond the Navier-Stokes approximation.
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Ansumali, Santosh; Karlin, I.V.; Карлин, Илья Вениаминович
Аннотация: Recently, analytical solutions for the nonlinear Couette flow demonstrated the relevance of the lattice Boltzmann (LB) models to hydrodynamics beyond the continuum limit [S. Ansumali et al., Phys. Rev. Lett. 98, 124502 (2007)]. In this paper, we present a systematic study of the simplest LB kinetic equation—the nine-bit model in two dimensions—in order to quantify it as a slip flow approximation. Details of the aforementioned analytical solution are presented, and results are extended to include a general shear- and force-driven unidirectional flow in confined geometry. Exact solutions for the velocity, as well as for pertinent higher-order moments of the distribution functions, are obtained in both Couette and Poiseuille steady-state flows for all values of rarefaction parameter (Knudsen number). Results are compared with the slip flow solution by Cercignani, and a good quantitative agreement is found for both flow situations. Thus, the standard nine-bit LB model is characterized as a valid and self-consistent slip flow model for simulations beyond the Navier-Stokes approximation.
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Ansumali, Santosh; Karlin, I.V.; Карлин, Илья Вениаминович
Shear driven two-phase flows in vertical cylindrical duct
[Text] : статья / Y. Gaponenko, A. Mialdun, V. Shevtsova // International Journal of Multiphase Flow. - 2012. - Vol. 39. - p. 205-215, DOI 10.1007/s12217-008-9075-7
. - ISSN 0938-0108
Кл.слова (ненормированные):
Gas–liquid flow -- Entrainment -- Interface deformation -- Liquid bridge -- Free surface deformation -- Viscosity contrast
Аннотация: Experiments and numerical simulations were carried out for shear-driven two-phase flows in a confined volume of liquid under conditions of normal gravity. The geometry corresponds to a cylindrical liquid bridge surrounded by a concentric annular gas channel with external solid walls. The internal part consists of solid supports at the bottom and top, while the central part is a liquid zone filled with a viscous liquid and kept in its position by surface tension. Gas enters into the annular duct, flows between solid walls and upon reaching the liquid zone entrains initially quiescent liquid. The flow dynamics is governed by the Navier–Stokes equations in both fluids, which are numerically solved in the exact experimental geometry taking into account interface deformation by gravity. In the experiments 5 cSt silicone oil and air were used as test fluids and the flow was monitored by means of particle tracking velocimetry. The experiments were performed for unit aspect ratio (the ratio of liquid zone length to its radius), while the simulations of shear-driven flow were carried out for a wide range of parameters. A particular attention is focused on the effect of free surface shape and fluids viscosity contrast on the interfacial flow dynamics. The current study suggests a linear dependence between velocities of gas and liquid when the viscosity of the liquid is larger by two orders of magnitude than that of gas. Another relation is proposed when the fluids viscosity ratio, μl/μg, is less than 50.
Полный текст на сайте правообладателя
Доп.точки доступа:
Mialdun, A.; Shevtsova, V.; Гапоненко, Юрий Анатольевич
Кл.слова (ненормированные):
Gas–liquid flow -- Entrainment -- Interface deformation -- Liquid bridge -- Free surface deformation -- Viscosity contrast
Аннотация: Experiments and numerical simulations were carried out for shear-driven two-phase flows in a confined volume of liquid under conditions of normal gravity. The geometry corresponds to a cylindrical liquid bridge surrounded by a concentric annular gas channel with external solid walls. The internal part consists of solid supports at the bottom and top, while the central part is a liquid zone filled with a viscous liquid and kept in its position by surface tension. Gas enters into the annular duct, flows between solid walls and upon reaching the liquid zone entrains initially quiescent liquid. The flow dynamics is governed by the Navier–Stokes equations in both fluids, which are numerically solved in the exact experimental geometry taking into account interface deformation by gravity. In the experiments 5 cSt silicone oil and air were used as test fluids and the flow was monitored by means of particle tracking velocimetry. The experiments were performed for unit aspect ratio (the ratio of liquid zone length to its radius), while the simulations of shear-driven flow were carried out for a wide range of parameters. A particular attention is focused on the effect of free surface shape and fluids viscosity contrast on the interfacial flow dynamics. The current study suggests a linear dependence between velocities of gas and liquid when the viscosity of the liquid is larger by two orders of magnitude than that of gas. Another relation is proposed when the fluids viscosity ratio, μl/μg, is less than 50.
Полный текст на сайте правообладателя
Доп.точки доступа:
Mialdun, A.; Shevtsova, V.; Гапоненко, Юрий Анатольевич
Liquid entrainment by gas flow along the interface of a liquid bridge
[Text] : статья / Y. Gaponenko, A. Mialdun, V. Shevtsova // The European Physical Journal Special Topics. - 2011. - Vol. 192, Iss. 1. - p. 63-70, DOI 10.1140/epjst/e2011-01360-0
. - ISSN 1951-6355
Аннотация: We report the results of numerical and experimental studies of two-phase flows in an annulus. The geometry corresponds to a cylindrical liquid column co-axially placed into an outer cylinder with solid walls. Gas enters into the annular duct and entrains the initially quiescent liquid. The internal column consists of solid rods at the bottom and top, while the central part is a liquid bridge from a viscous liquid and kept in its position by surface tension. Silicone oil 5cSt was used as a test liquid and air and nitrogen as gases. An original numerical approach was developed to study the problem in complex geometry. The flow structure in the liquid is analyzed for a wide range of gas flow rates.
Полный текст на сайте правообладателя
Доп.точки доступа:
Mialdun, A.; Shevtsova, V.; Гапоненко, Юрий Анатольевич
Аннотация: We report the results of numerical and experimental studies of two-phase flows in an annulus. The geometry corresponds to a cylindrical liquid column co-axially placed into an outer cylinder with solid walls. Gas enters into the annular duct and entrains the initially quiescent liquid. The internal column consists of solid rods at the bottom and top, while the central part is a liquid bridge from a viscous liquid and kept in its position by surface tension. Silicone oil 5cSt was used as a test liquid and air and nitrogen as gases. An original numerical approach was developed to study the problem in complex geometry. The flow structure in the liquid is analyzed for a wide range of gas flow rates.
Полный текст на сайте правообладателя
Доп.точки доступа:
Mialdun, A.; Shevtsova, V.; Гапоненко, Юрий Анатольевич
Study of a liquid bridge subjected to interface shear stresses
[Text] : статья / Y. Gaponenko, S. Glockner, A. Mialdun, V. Shevtsova // Acta Astronautica. - 2011. - Vol. 69, Iss. 3-4. - p. 119-126DOI 10.1016/j.actaastro.2011.03.012
. -
Аннотация: We report on numerical and experimental study of two-phase flows in a tall annulus. The geometry corresponds to a cylindrical liquid column co-axially placed into an outer cylinder with solid walls. The internal column consists of solid supports at the bottom and top, while the central part is a liquid zone filled with viscous liquid and kept in its position by surface tension. Gas enters into the annular duct and entrains initially quiescent liquid. The liquid bridge interface is deformed by gravity and by a co-axial gas flow which is co- and counter directed with respect to gravity. A new experimental set-up including an optical system for precise measurements of the interface displacement has been designed and developed. In the experiments silicone oil 5cSt was used as a test liquid and air as gas. On numerical side the dynamical response of an isothermal liquid bridge to a coaxial gas flow is examined by simulations of the Navier–Stokes equations. The attention is focused on the following points: time-dependent formation of the equilibrium shape of a liquid bridge in gravity conditions and its deformation by a gas flow, simulation of a flow pattern in a liquid/gas system with deformed free surface. The comparison of the numerical and experimental results for the interface deformation exhibits a satisfactory agreement.
Полный текст на сайте правообладателя
Доп.точки доступа:
Glockner, S.; Mialdun, A.; Shevtsova, V.; Гапоненко, Юрий Анатольевич
Аннотация: We report on numerical and experimental study of two-phase flows in a tall annulus. The geometry corresponds to a cylindrical liquid column co-axially placed into an outer cylinder with solid walls. The internal column consists of solid supports at the bottom and top, while the central part is a liquid zone filled with viscous liquid and kept in its position by surface tension. Gas enters into the annular duct and entrains initially quiescent liquid. The liquid bridge interface is deformed by gravity and by a co-axial gas flow which is co- and counter directed with respect to gravity. A new experimental set-up including an optical system for precise measurements of the interface displacement has been designed and developed. In the experiments silicone oil 5cSt was used as a test liquid and air as gas. On numerical side the dynamical response of an isothermal liquid bridge to a coaxial gas flow is examined by simulations of the Navier–Stokes equations. The attention is focused on the following points: time-dependent formation of the equilibrium shape of a liquid bridge in gravity conditions and its deformation by a gas flow, simulation of a flow pattern in a liquid/gas system with deformed free surface. The comparison of the numerical and experimental results for the interface deformation exhibits a satisfactory agreement.
Полный текст на сайте правообладателя
Доп.точки доступа:
Glockner, S.; Mialdun, A.; Shevtsova, V.; Гапоненко, Юрий Анатольевич
How to distinguish between kink and sausage modes in flapping oscillations?
[Text] / D. I. Kubyshkina [et al.] // J. Geophys. Res-Space Phys. - 2014. - Vol. 119, Is. 4. - P. 3002-3015, DOI 10.1002/2013JA019477. - Cited References: 32. - We thank C. W. Carlson and J. P. McFadden for use of THEMIS ESA data; K. H. Glassmeier, U. Auster, and W. Baumjohann for the use of FGM data provided under the lead of the Technical University of Braunschweig and with financial support through the German Ministry for Economy and Technology and the German Center for Aviation and Space (DLR) under contract 50 OC 0302. The work was partly supported by SPbU grant 11.38.84.12, by RFBR grants 12-05-00152-a and 12-05-00918-a, and by the grant for support of leading Scientific schools 2836.2014.5. The work of S. Dubyagin and N. Ganushkina was partly supported by the Academy of Finland. This work was supported by the Austrian Science Fund (FWF): I193-N16. N. V. E acknowledges the support by the International Space Science Institute (ISSI, Switzerland) and discussions within the ISSI Team 214 on Flow-Driven Instabilities of the Sun-Earth System. The research has received funding also from the European Union Seventh Framework Programme [FP7/2007-2013] under grant agreement 269198-Geoplasmas (Marie Curie International Research Staff Exchange Scheme) and 218816 (SOTERIA project).
. - ISSN 2169-9380. - ISSN 2169-9402
РУБ Astronomy & Astrophysics
Аннотация: Flapping waves are most noticeable large-scale perturbations of the magnetotail current sheet, whose nature is still under discussion. They represent rather slow (an order of magnitude less than typical Alfven speed) waves propagating from the center of the sheet to its flanks with a typical speed of 20-60 km/s, amplitude of 1-2 R-e and quasiperiod of 2-10 min. The double-gradient MHD model, which was elaborated in Erkaev et al. (2007) predicts two (kink and sausage) modes of the flapping waves with differences in their geometry and propagation velocity, but the mode structure is hard to resolve observationally. We investigate the possibility of mode identification by observing the rotation of magnetic field and plasma velocity vectors from a single spacecraft. We test theoretical results by analyzing the flapping oscillations observed by Time History of Events and Macroscale Interactions during Substorms spacecraft and confirm that character of observed rotation is consistent with kink mode determination made by using multispacecraft methods. Also, we checked how the existence of some obstructive conditions, such as noise, combined modes, and multiple sources of the flapping oscillations, can affect on the possibility of the modes separation with suggested method.
Полный текст (доступен только в локальной сети)
Держатели документа:
ИВМ СО РАН
Доп.точки доступа:
Kubyshkina, D.I.; Sormakov, D.A.; Sergeev, V.A.; Semenov, V.S.; Erkaev, N.V.; Еркаев, Николай Васильевич; Kubyshkin, I.V.; Ganushkina, N.Y.; Dubyagin, S.V.; German Ministry for Economy and Technology; German Center for Aviation and Space (DLR) [50 OC 0302]; SPbU [11.38.84.12]; RFBR [12-05-00152-a, 12-05-00918-a]; grant for support of leading Scientific schools [2836.2014.5]; Academy of Finland; Austrian Science Fund (FWF) [I193-N16]; International Space Science Institute (ISSI, Switzerland); European Union [269198, 218816]
Рубрики:
CURRENT SHEET OSCILLATIONS
MAGNETIC-FIELD
CLUSTER OBSERVATIONS
PLASMA SHEET
MAGNETOTAIL
INSTABILITY
STABILITY
MOTIONS
EARTH
Кл.слова (ненормированные):
plasma sheet -- magnetosphere -- flapping waves
CURRENT SHEET OSCILLATIONS
MAGNETIC-FIELD
CLUSTER OBSERVATIONS
PLASMA SHEET
MAGNETOTAIL
INSTABILITY
STABILITY
MOTIONS
EARTH
Кл.слова (ненормированные):
plasma sheet -- magnetosphere -- flapping waves
Аннотация: Flapping waves are most noticeable large-scale perturbations of the magnetotail current sheet, whose nature is still under discussion. They represent rather slow (an order of magnitude less than typical Alfven speed) waves propagating from the center of the sheet to its flanks with a typical speed of 20-60 km/s, amplitude of 1-2 R-e and quasiperiod of 2-10 min. The double-gradient MHD model, which was elaborated in Erkaev et al. (2007) predicts two (kink and sausage) modes of the flapping waves with differences in their geometry and propagation velocity, but the mode structure is hard to resolve observationally. We investigate the possibility of mode identification by observing the rotation of magnetic field and plasma velocity vectors from a single spacecraft. We test theoretical results by analyzing the flapping oscillations observed by Time History of Events and Macroscale Interactions during Substorms spacecraft and confirm that character of observed rotation is consistent with kink mode determination made by using multispacecraft methods. Also, we checked how the existence of some obstructive conditions, such as noise, combined modes, and multiple sources of the flapping oscillations, can affect on the possibility of the modes separation with suggested method.
Полный текст (доступен только в локальной сети)
Держатели документа:
ИВМ СО РАН
Доп.точки доступа:
Kubyshkina, D.I.; Sormakov, D.A.; Sergeev, V.A.; Semenov, V.S.; Erkaev, N.V.; Еркаев, Николай Васильевич; Kubyshkin, I.V.; Ganushkina, N.Y.; Dubyagin, S.V.; German Ministry for Economy and Technology; German Center for Aviation and Space (DLR) [50 OC 0302]; SPbU [11.38.84.12]; RFBR [12-05-00152-a, 12-05-00918-a]; grant for support of leading Scientific schools [2836.2014.5]; Academy of Finland; Austrian Science Fund (FWF) [I193-N16]; International Space Science Institute (ISSI, Switzerland); European Union [269198, 218816]
Formation of the structure and effective properties of composite material in the manufacture of shells with cross-ply reinforcement
/ N. V. Kireev, G. I. Starostin // Mechanics of Composite Materials. - 1993. - Vol. 28, Is. 5. - P419-426, DOI 10.1007/BF00608610
. - ISSN 0191-5665
Аннотация: The proposed model of formation of the reinforcing framework in the manufacture of an axisymmetric shell by the CPW method makes it possible to numerically determine the thicknesses and rates of filling the layers, reinforcement angles as a function of the main parameters of the technological process, geometry of the mandrel, and characteristics of the reinforcing filament. It was established that the thicknesses of the layers, reinforcement rates and angles, and, as a consequence, the effective stiffness characteristics of the composite are substantially variable both along the meridian and over the thickness of the shell. В© 1993 Plenum Publishing Corporation.
Scopus
Держатели документа:
Computer Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Kireev, N.V.; Starostin, G.I.
Аннотация: The proposed model of formation of the reinforcing framework in the manufacture of an axisymmetric shell by the CPW method makes it possible to numerically determine the thicknesses and rates of filling the layers, reinforcement angles as a function of the main parameters of the technological process, geometry of the mandrel, and characteristics of the reinforcing filament. It was established that the thicknesses of the layers, reinforcement rates and angles, and, as a consequence, the effective stiffness characteristics of the composite are substantially variable both along the meridian and over the thickness of the shell. В© 1993 Plenum Publishing Corporation.
Scopus
Держатели документа:
Computer Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
ИВМ СО РАН
Доп.точки доступа:
Kireev, N.V.; Starostin, G.I.
Local algebraic analysis of differential systems
/ O. V. Kaptsov // Theor. Math. Phys. - 2015. - Vol. 183, Is. 3. - P740-755, DOI 10.1007/s11232-015-0293-z
. - ISSN 0040-5779. - ISSN 1573-9333
Аннотация: We propose a new approach for studying the compatibility of partial differential equations. This approach is a synthesis of the Riquier method, Grobner basis theory, and elements of algebraic geometry. As applications, we consider systems including the wave equation and the sine-Gordon equation. © 2015, Pleiades Publishing, Ltd.
Scopus
Держатели документа:
Institute of Computational Modeling, Siberian Branch, RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Kaptsov, O.V.; Капцов, Олег Викторович
Аннотация: We propose a new approach for studying the compatibility of partial differential equations. This approach is a synthesis of the Riquier method, Grobner basis theory, and elements of algebraic geometry. As applications, we consider systems including the wave equation and the sine-Gordon equation. © 2015, Pleiades Publishing, Ltd.
Scopus
Держатели документа:
Institute of Computational Modeling, Siberian Branch, RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Kaptsov, O.V.; Капцов, Олег Викторович
577.29
Ф 94
Ф 94
Функционализированные аптамерами магнитные нанодиски для нанохирургии опухолей
[Текст] : статья / С. С. Замай [и др.] // Сибирское медицинское обозрение. - 2015. - № 6. - С. 48-54
. - ISSN 1819-9496
Перевод заглавия: Functionalized by the aptamers magnetic nanodiscs for nanosurgery of the tumors
Кл.слова (ненормированные):
нанохирургия -- Nanosurgery -- nickel magnetic nanodiscs -- Aptamers -- Ehrlich ascites carcinoma -- никелевые магнитные нанодиски -- аптамеры -- асцитная карцинома Эрлиха
Аннотация: Цель исследования. Определение перспектив использования функционализированных ДНК-аптамерами магнитных никелевых нанодисков с золотым покрытием для адресной клеточной хирургии онкологических заболеваний. Матери алы и методы. В качестве модели опухоли была использована асцитная карцинома Эрлиха. Теоретически и экспериментально исследованы структуры магнитного поля пермаллоевых и кобальтовых дисков Au-Fe(20)Ni(80)-Au и Au-Co-Au. Результаты. Выполнены оценки механического воздействия нанодисков на клеточную мембрану в переменном магнитном поле. Определены оптимальные состав, геометрия и структура остаточной намагниченности нанодисков. Экспериментально in vitro и in vivo для асцитной карциномы Эрлиха показана возможность использования функционализированных ДНК-аптамерами трехслойных Au-Ni-Au нанодисков с дипольной структурой остаточной намагниченности для адресного разрушения клеток-мишеней. 3аключе-ие. На основании теоретических расчетов и экспериментальных данных сделано заключение о том, что нанодиски Au-Ni-Au, обладающие магнитными свойствами, могут быть использованы для разработки новых методов и препаратов для малоинвазивной клеточной нанохирургии, которая позволяет адресно и дозировано уничтожать только клетки опухоли, в том числе, и метастазы.
The aim of the research. Determination of the prospects of application the functionalized by DNA-aptamers magnetic nickel nanodiscs with gold coating for targeted cell cancer surgery. Materials and methods. As tumor model was used Ehrlich ascites carcinoma. Theoretically and experimentally were investigated the structures of the magnetic field of permalloy and cobalt disks Au-Fe (20) Ni (80) -Au and Au-Co-Au. Results. It were executed the estimation of the mechanical impact of nanodiscs to the cell membrane in an alternating magnetic field. It was determined the optimum composition, geometry and structure of the residual magnetization of nanodiscs. Experimentally in vitro and in vivo for Ehrlich ascites carcinoma was showed the use of functionalized DNA-aptamers three layer Au-Ni-Au nanodisks with dipole structure of the residual magnetization for address destruction of the target cells. Conclusion. On the basis of theoretical calculations and experimental data, it was concluded that nanodiscs Au-Ni-Au, with magnetic properties, can be used to develop new methods and products for minimally invasive cellular nanosurgery that allows targeted and dosed destroy only tumor cells, including metastasis.
РИНЦ
Держатели документа:
ГАОУ ВПО Сибирский федеральный университет
ГБОУ ВПО Красноярский государственный медицинский университет имени проф. В. Ф. Войно-Ясенецкого Министерства здравоохранения РФ
ГБОУ ВПО Красноярский государственный педагогический университет им. В. П. Астафьева Министерства образования и науки РФ
Институт вычислительного моделирования СО РАН
Красноярский научный центр СО РАН
Доп.точки доступа:
Замай, Сергей Сергеевич; Zamay Sergey Sergeevich; Прокопенко, Владимир Семенович; Prokopenko Vladimir Semenovich; Замай, Анна Сергеевна; Zamay Anna Sergeevna; Денисенко, Валерий Васильевич; Denisenko V.V.; Ким, Петр Дементьевич; Kim Petr Dementievich; Орлов, Виталий Александрович; Orlov Vitaly Alerksandrovich; Замай, Галина Сергеевна; Zamay Galina Sergeevna; Иванченко, Татьяна Ивановна; Ivanchenko Tatiana Ivanovna; Замай, Татьяна Николаевна; Zamay Tatiana Nikolaevna
Перевод заглавия: Functionalized by the aptamers magnetic nanodiscs for nanosurgery of the tumors
| УДК |
Кл.слова (ненормированные):
нанохирургия -- Nanosurgery -- nickel magnetic nanodiscs -- Aptamers -- Ehrlich ascites carcinoma -- никелевые магнитные нанодиски -- аптамеры -- асцитная карцинома Эрлиха
Аннотация: Цель исследования. Определение перспектив использования функционализированных ДНК-аптамерами магнитных никелевых нанодисков с золотым покрытием для адресной клеточной хирургии онкологических заболеваний. Матери алы и методы. В качестве модели опухоли была использована асцитная карцинома Эрлиха. Теоретически и экспериментально исследованы структуры магнитного поля пермаллоевых и кобальтовых дисков Au-Fe(20)Ni(80)-Au и Au-Co-Au. Результаты. Выполнены оценки механического воздействия нанодисков на клеточную мембрану в переменном магнитном поле. Определены оптимальные состав, геометрия и структура остаточной намагниченности нанодисков. Экспериментально in vitro и in vivo для асцитной карциномы Эрлиха показана возможность использования функционализированных ДНК-аптамерами трехслойных Au-Ni-Au нанодисков с дипольной структурой остаточной намагниченности для адресного разрушения клеток-мишеней. 3аключе-ие. На основании теоретических расчетов и экспериментальных данных сделано заключение о том, что нанодиски Au-Ni-Au, обладающие магнитными свойствами, могут быть использованы для разработки новых методов и препаратов для малоинвазивной клеточной нанохирургии, которая позволяет адресно и дозировано уничтожать только клетки опухоли, в том числе, и метастазы.
The aim of the research. Determination of the prospects of application the functionalized by DNA-aptamers magnetic nickel nanodiscs with gold coating for targeted cell cancer surgery. Materials and methods. As tumor model was used Ehrlich ascites carcinoma. Theoretically and experimentally were investigated the structures of the magnetic field of permalloy and cobalt disks Au-Fe (20) Ni (80) -Au and Au-Co-Au. Results. It were executed the estimation of the mechanical impact of nanodiscs to the cell membrane in an alternating magnetic field. It was determined the optimum composition, geometry and structure of the residual magnetization of nanodiscs. Experimentally in vitro and in vivo for Ehrlich ascites carcinoma was showed the use of functionalized DNA-aptamers three layer Au-Ni-Au nanodisks with dipole structure of the residual magnetization for address destruction of the target cells. Conclusion. On the basis of theoretical calculations and experimental data, it was concluded that nanodiscs Au-Ni-Au, with magnetic properties, can be used to develop new methods and products for minimally invasive cellular nanosurgery that allows targeted and dosed destroy only tumor cells, including metastasis.
РИНЦ
Держатели документа:
ГАОУ ВПО Сибирский федеральный университет
ГБОУ ВПО Красноярский государственный медицинский университет имени проф. В. Ф. Войно-Ясенецкого Министерства здравоохранения РФ
ГБОУ ВПО Красноярский государственный педагогический университет им. В. П. Астафьева Министерства образования и науки РФ
Институт вычислительного моделирования СО РАН
Красноярский научный центр СО РАН
Доп.точки доступа:
Замай, Сергей Сергеевич; Zamay Sergey Sergeevich; Прокопенко, Владимир Семенович; Prokopenko Vladimir Semenovich; Замай, Анна Сергеевна; Zamay Anna Sergeevna; Денисенко, Валерий Васильевич; Denisenko V.V.; Ким, Петр Дементьевич; Kim Petr Dementievich; Орлов, Виталий Александрович; Orlov Vitaly Alerksandrovich; Замай, Галина Сергеевна; Zamay Galina Sergeevna; Иванченко, Татьяна Ивановна; Ivanchenko Tatiana Ivanovna; Замай, Татьяна Николаевна; Zamay Tatiana Nikolaevna
Ultimate pit limit substantiation for the purpose of forestry reclamation of lands at ballast quarries in Siberia
/ I. V. Zenkov, I. M. Baradulin // Gorn. Zh. - 2016. - Vol. 2016, Is. 3. - С. 85-88, DOI 10.17580/gzh.2016.03.18
. - ISSN 0017-2278
Кл.слова (ненормированные):
Ballast quarries -- Environmental efficiency -- Geographical orientation of nonworking pit walls -- Road metal production -- Siberia
Аннотация: Slow-rate development of mineral resources in Siberia is connected with remoteness of mineral fields and deficiency in hard-surface roads. The approval of the government transport system program in Siberia requires boosting road metal production and quarrying expansion. Mined-out voids of depleted quarries disturb lands and remain bare for a long time. The situation in the Krasnoyarsk Territory is of particular concern. It is urgently required to find planting methods for mined-out ballast quarries. The obstacle is the traditional geometry of mined-out open pits, with steep walls and vast bottom flooded with atmospheric precipitations. Ecological monitoring of mined-out surface mines in the Krasnoyarsk Territory and most effective vegetation of mined-out voids shows that, given the local climate (long cold winter and short hot summer), population of trees is higher on the southern and eastern pit walls, where moisture content is higher and trees are less dehumidified under the sun in simmer; of no less significance is flatness of slopes and weak inclination (3-5°) of roads towards pit walls, as well as presence of fertile soil layer in the walls. On special purpose plots of land 0.2 ha in area, trees have been counted per each element of a quarry, which makes the basis to develop recommendations on environmentally optimal shape of quarries: maximum area of the southern and eastern pitwalls to be slightly sloping (15-24°), minimum technologically reasoned area of bottom is shifted northwestward. The study is in accordance with the Fundamental Research Program of the National Academies of Sciences for 2013-2020 and the research plan of the Nauka Design and Engineering Center, ICT SB RAS for 2013-2017, under the project "Information Support Models and Technologies for Evaluation, Forecasting and Management of Regional Eco-Systems, Territorial Infrastructure and Natural and Industrial Safety".
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Держатели документа:
Institute of Computational Technologies, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Nauka Design and Engineering Center, Krasnoyarsk Division
Доп.точки доступа:
Zenkov, I. V.; Baradulin, I. M.
Кл.слова (ненормированные):
Ballast quarries -- Environmental efficiency -- Geographical orientation of nonworking pit walls -- Road metal production -- Siberia
Аннотация: Slow-rate development of mineral resources in Siberia is connected with remoteness of mineral fields and deficiency in hard-surface roads. The approval of the government transport system program in Siberia requires boosting road metal production and quarrying expansion. Mined-out voids of depleted quarries disturb lands and remain bare for a long time. The situation in the Krasnoyarsk Territory is of particular concern. It is urgently required to find planting methods for mined-out ballast quarries. The obstacle is the traditional geometry of mined-out open pits, with steep walls and vast bottom flooded with atmospheric precipitations. Ecological monitoring of mined-out surface mines in the Krasnoyarsk Territory and most effective vegetation of mined-out voids shows that, given the local climate (long cold winter and short hot summer), population of trees is higher on the southern and eastern pit walls, where moisture content is higher and trees are less dehumidified under the sun in simmer; of no less significance is flatness of slopes and weak inclination (3-5°) of roads towards pit walls, as well as presence of fertile soil layer in the walls. On special purpose plots of land 0.2 ha in area, trees have been counted per each element of a quarry, which makes the basis to develop recommendations on environmentally optimal shape of quarries: maximum area of the southern and eastern pitwalls to be slightly sloping (15-24°), minimum technologically reasoned area of bottom is shifted northwestward. The study is in accordance with the Fundamental Research Program of the National Academies of Sciences for 2013-2020 and the research plan of the Nauka Design and Engineering Center, ICT SB RAS for 2013-2017, under the project "Information Support Models and Technologies for Evaluation, Forecasting and Management of Regional Eco-Systems, Territorial Infrastructure and Natural and Industrial Safety".
Scopus,
Смотреть статью
Держатели документа:
Institute of Computational Technologies, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Nauka Design and Engineering Center, Krasnoyarsk Division
Доп.точки доступа:
Zenkov, I. V.; Baradulin, I. M.
Microconvection in vertical channel at given heat flux
/ V. B. Bekezhanova, I. A. Shefer // J. Phys. Conf. Ser. - 2016. - Vol. 754, Is. 2, DOI 10.1088/1742-6596/754/2/022001
. - ISSN 1742-6588
Кл.слова (ненормированные):
Fluid dynamics -- Heat conduction -- Heat transfer -- Hydrodynamics -- Thermal load -- Conducting liquid -- Disturbance waves -- Polygonal structures -- Problem parameters -- Spatial characteristics -- Thermal disturbance -- Two-dimensional flow -- Vertical channels -- Heat flux
Аннотация: A problem on stability of the viscous heat-conducting liquid flow in the vertical channel at given heat flux on the permeable solid walls is studied. The two-dimensional flow is described by an exact invariant solution of the microconvection equations. The investigation of the exact solution allows one to find out the extent of influence of the thermal load, gravity and the system geometry on the flow structure. Stability of the solution is investigated in the framework of the linear theory. The spectrum of the spatial characteristic perturbations is analyzed in the space of problem parameters. Typical forms of the hydrodynamic and thermal disturbances are presented and dependence of characteristics of the arising structures on the thermal load and gravity is established. Convective cells, hydrothermal rolls and polygonal structures can appear in the channel. By weak gravity the hydrothermal rolls are not formed. Changing heat flux and disturbance wave length lead to deformation of the cells and complication of the spatial form of the structures. © Published under licence by IOP Publishing Ltd.
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Держатели документа:
Institute of Computational Modeling, SB, RAS, 50/44 Krasnoyarsk, Akademgorodok, Russian Federation
Institute of Mathematics and Computer Sciences, Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Bekezhanova, V. B.; Shefer, I. A.
Кл.слова (ненормированные):
Fluid dynamics -- Heat conduction -- Heat transfer -- Hydrodynamics -- Thermal load -- Conducting liquid -- Disturbance waves -- Polygonal structures -- Problem parameters -- Spatial characteristics -- Thermal disturbance -- Two-dimensional flow -- Vertical channels -- Heat flux
Аннотация: A problem on stability of the viscous heat-conducting liquid flow in the vertical channel at given heat flux on the permeable solid walls is studied. The two-dimensional flow is described by an exact invariant solution of the microconvection equations. The investigation of the exact solution allows one to find out the extent of influence of the thermal load, gravity and the system geometry on the flow structure. Stability of the solution is investigated in the framework of the linear theory. The spectrum of the spatial characteristic perturbations is analyzed in the space of problem parameters. Typical forms of the hydrodynamic and thermal disturbances are presented and dependence of characteristics of the arising structures on the thermal load and gravity is established. Convective cells, hydrothermal rolls and polygonal structures can appear in the channel. By weak gravity the hydrothermal rolls are not formed. Changing heat flux and disturbance wave length lead to deformation of the cells and complication of the spatial form of the structures. © Published under licence by IOP Publishing Ltd.
Scopus,
Смотреть статью
Держатели документа:
Institute of Computational Modeling, SB, RAS, 50/44 Krasnoyarsk, Akademgorodok, Russian Federation
Institute of Mathematics and Computer Sciences, Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Bekezhanova, V. B.; Shefer, I. A.
Методика проектирования многостадийного ГРП с помощью веб-инструмента OptiFracMS
[Текст] : статья / Михаил Евгеньевич Артемьев, Павел Викторович Белолипецкий // Научный альманах. - 2016. - № 1-3. - С. 19-22, DOI 10.17117/na.2016.01.03.019
. - ISSN 2411-7609
Перевод заглавия: Methods of designing multi-stage hydraulic fracturing using a web tool OptiFracMS
Аннотация: OptiFracMS (pengtools.com) - это инструмент проектирования оптимального мультистадийного ГРП для горизонтальной скважины. Для заданного набора свойств месторождения и имеющееся массы проппанта он вычисляет оптимальное число трещин и их геометрию для максимизации продуктивности пласта
OptiFracMS (pengtools.com) - a tool for the design of optimal multi-stage fracturing of horizontal wells. For a given set of properties of the deposit and having a weight proppant it calculates the optimum number of cracks and their geometry in order to maximize the productivity of the formation
РИНЦ
Держатели документа:
Институт вычислительного моделирования Сибирского отделения российской Академии Наук
Доп.точки доступа:
Белолипецкий, Павел Викторович; Belolipetskii P.V.
Перевод заглавия: Methods of designing multi-stage hydraulic fracturing using a web tool OptiFracMS
Аннотация: OptiFracMS (pengtools.com) - это инструмент проектирования оптимального мультистадийного ГРП для горизонтальной скважины. Для заданного набора свойств месторождения и имеющееся массы проппанта он вычисляет оптимальное число трещин и их геометрию для максимизации продуктивности пласта
OptiFracMS (pengtools.com) - a tool for the design of optimal multi-stage fracturing of horizontal wells. For a given set of properties of the deposit and having a weight proppant it calculates the optimum number of cracks and their geometry in order to maximize the productivity of the formation
РИНЦ
Держатели документа:
Институт вычислительного моделирования Сибирского отделения российской Академии Наук
Доп.точки доступа:
Белолипецкий, Павел Викторович; Belolipetskii P.V.
669.536.7
В117
В117
Влияние геометрии лунки на качество слитков из деформируемых алюминиевых сплавов
[Текст] : статья / Г. Г. Крушенко [и др.] // Решетневские чтения. - 2016. - Т. 1, № 20. - С. 130-132
. - ISSN 1990-7702
Перевод заглавия: THE INFLUENCE OF THE POOL GEOMETRY ON THE QUALITY OF INGOTS MADE OF WROUGHT ALUMINIUM ALLOYS
Кл.слова (ненормированные):
полунепрерывное литье слитков -- ЛУНКА -- модифицирование -- нанопорошок -- semi-continuous casting of ingots -- pool -- modification -- nanopowder
Аннотация: Различные виды продукции, получаемые обработкой давлением из алюминиевых слитков, отливаемых полунепрерывным способом, широко применяются в аэрокосмической отрасли. Геометрия жидкой лунки в слитке существенно влияет на формирование структуры и качества слитка. Применение в качестве модификатора нанопорошка нитрида титана, который вводили в лунку, позволило получить точную ее геометрию.
Different types of products obtained by treatment of pressure aluminum ingots, cast by semi-continuous method, are widely used in the aerospace industry. The geometry of the liquid in pool of an ingot significantly affects the formation of the structure and quality of ingot. Use as a modifier of nanopowder titanium nitride, which is injected into the pool, allows us to obtain the exact geometry.
РИНЦ
Держатели документа:
Институт вычислительного моделирования СО РАН
ООО «Красноярск-Стройинжиниринг»
Сибирский государственный аэрокосмический университет имени академика М. Ф. Решетнева
ФГУП "Конструкторское бюро "Арсенал" им. М.В. Фрунзе»
Доп.точки доступа:
Крушенко, Генрих Гаврилович; Krushenko G.G.; Двирный, Г.В.; Dvirniy G.V.; Голованова, В.В.; Golovanova V.V.; Цау, К.К.; Tsau K.K.
Перевод заглавия: THE INFLUENCE OF THE POOL GEOMETRY ON THE QUALITY OF INGOTS MADE OF WROUGHT ALUMINIUM ALLOYS
| УДК |
Кл.слова (ненормированные):
полунепрерывное литье слитков -- ЛУНКА -- модифицирование -- нанопорошок -- semi-continuous casting of ingots -- pool -- modification -- nanopowder
Аннотация: Различные виды продукции, получаемые обработкой давлением из алюминиевых слитков, отливаемых полунепрерывным способом, широко применяются в аэрокосмической отрасли. Геометрия жидкой лунки в слитке существенно влияет на формирование структуры и качества слитка. Применение в качестве модификатора нанопорошка нитрида титана, который вводили в лунку, позволило получить точную ее геометрию.
Different types of products obtained by treatment of pressure aluminum ingots, cast by semi-continuous method, are widely used in the aerospace industry. The geometry of the liquid in pool of an ingot significantly affects the formation of the structure and quality of ingot. Use as a modifier of nanopowder titanium nitride, which is injected into the pool, allows us to obtain the exact geometry.
РИНЦ
Держатели документа:
Институт вычислительного моделирования СО РАН
ООО «Красноярск-Стройинжиниринг»
Сибирский государственный аэрокосмический университет имени академика М. Ф. Решетнева
ФГУП "Конструкторское бюро "Арсенал" им. М.В. Фрунзе»
Доп.точки доступа:
Крушенко, Генрих Гаврилович; Krushenko G.G.; Двирный, Г.В.; Dvirniy G.V.; Голованова, В.В.; Golovanova V.V.; Цау, К.К.; Tsau K.K.
669.536.7
В959
В959
Выявление лунки в слитках, отливаемых полунепрерывным способом из алюминиевых деформируемых сплавов
[Текст] : статья / Г. Г. Крушенко, В. П. НАЗАРОВ // Технология металлов. - 2016. - № 10. - С. 2-7
. - ISSN 1684-2499
Перевод заглавия: Identification of pool in ingots cast by semicontinuous method of wrought aluminum alloys
Кл.слова (ненормированные):
полунепрерывное литье слитков -- ЛУНКА -- модифицирование -- нанопорошок -- Semicontinuous casting -- ingot -- pool -- modification -- nanopowder
Аннотация: Различные виды продукции (лист, профиль и др.), получаемые методами обработки давлением (прокат, ковка, штамповка и др.) из слитков, отливаемых полунепрерывным способом, широко применяются в аэрокосмической отрасли. При этом в верхней части жидкого металла в кристаллизаторе существует так называемая лунка, представляющая собой конусообразный объем жидкого металла. Опыт показал, что геометрия лунки, ее глубина и форма существенно влияют на формирование структуры и качества слитка. Применение в качестве модификатора нанопорошка нитрида титана, который вводили в расплав в объеме прутка, позволило получить точную геометрию лунки.
Different types of products (sheet, profile, etc.) obtained by means of pressure treatment (rolling, forging, stamping, etc.) of ingots cast by the semicontinuous method, widely used in the aerospace industry. In the upper part of liquid metal in a mold there is a so-called «pool» which is a cone-shaped volume of liquid metal, and its circuit is a solidification front and is a boundary between the liquid metal (above the circuit) and the solid one (lower the circuit). Experience has shown that the geometry of the pool, its depth and shape significantly affect the formation of the structure and quality of such an ingot, so it is necessary to have data about this parameter. Use of the titanium nitride nanopowder that was added into the melt in the rod volume as a modifier made possible to obtain an exact geometry of the pool.
РИНЦ
Держатели документа:
Институт вычислительного моделирования СО РАН
Сибирский государственный аэрокосмический университет имени академика М. Ф. Решетнева
Доп.точки доступа:
НАЗАРОВ, В.П.; Nazarov V.P.; Krushenko G.G.
Перевод заглавия: Identification of pool in ingots cast by semicontinuous method of wrought aluminum alloys
| УДК |
Кл.слова (ненормированные):
полунепрерывное литье слитков -- ЛУНКА -- модифицирование -- нанопорошок -- Semicontinuous casting -- ingot -- pool -- modification -- nanopowder
Аннотация: Различные виды продукции (лист, профиль и др.), получаемые методами обработки давлением (прокат, ковка, штамповка и др.) из слитков, отливаемых полунепрерывным способом, широко применяются в аэрокосмической отрасли. При этом в верхней части жидкого металла в кристаллизаторе существует так называемая лунка, представляющая собой конусообразный объем жидкого металла. Опыт показал, что геометрия лунки, ее глубина и форма существенно влияют на формирование структуры и качества слитка. Применение в качестве модификатора нанопорошка нитрида титана, который вводили в расплав в объеме прутка, позволило получить точную геометрию лунки.
Different types of products (sheet, profile, etc.) obtained by means of pressure treatment (rolling, forging, stamping, etc.) of ingots cast by the semicontinuous method, widely used in the aerospace industry. In the upper part of liquid metal in a mold there is a so-called «pool» which is a cone-shaped volume of liquid metal, and its circuit is a solidification front and is a boundary between the liquid metal (above the circuit) and the solid one (lower the circuit). Experience has shown that the geometry of the pool, its depth and shape significantly affect the formation of the structure and quality of such an ingot, so it is necessary to have data about this parameter. Use of the titanium nitride nanopowder that was added into the melt in the rod volume as a modifier made possible to obtain an exact geometry of the pool.
РИНЦ
Держатели документа:
Институт вычислительного моделирования СО РАН
Сибирский государственный аэрокосмический университет имени академика М. Ф. Решетнева
Доп.точки доступа:
НАЗАРОВ, В.П.; Nazarov V.P.; Krushenko G.G.
Diagnostics of Complex Phenomena on the Basis of Geometrical Analysis Images
/ L. Cadena [et al.] // Lecture Notes in Engineering and Computer Science : Newswood Limited, 2017. - Vol. 2227: 2017 International MultiConference of Engineers and Computer Scientists, IMECS 2017 (15 March 2017 through 17 March 2017, ) Conference code: 133365. - P401-404
. -
Кл.слова (ненормированные):
Analysis of medical images -- Contour -- Denoising -- Image processing -- Medical image -- Shearlet -- Ureteroscopy -- Urolithiasis -- Wavelets -- Diagnosis -- Geometry -- Image processing -- Medical imaging -- Contour -- De-noising -- Shearlet -- Ureteroscopy -- Urolithiasis -- Wavelets -- Image analysis
Аннотация: A review of the basic concepts shearlet transform spatial data observations. The possibilities of the new approach for the geometric analysis of complex medical images. The proposed method can improve the radiological diagnosis of urological diseases by detailing changes of tissues. On the basis of the developed method of spectral data decomposition is performed solution of filtration problem and isolating contour studied medical target. The task of image contrast is also solved for the better understanding of the found geometric features and patterns.
Scopus
Держатели документа:
Electric and Electronic Department, Universidad de las Fuerzas Armadas ESPE, Av. Gral Ruminahui s/n, Sangolqui, Ecuador
College Juan Suarez Chacon, Quito, Ecuador
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
Institute of Computational Modelling, Siberian Branch, Russian Academy of Science, 50/44 Akademgorodok str., Krasnoyarsk, Russian Federation
Krasnoyarsk State Medical University, 1 Partizana Geleznyaka str., Krasnoyarsk, Russian Federation
Доп.точки доступа:
Cadena, L.; Cadena, F.; Kruglyakov, A.; Simonov, K.; Kapsargin, F.
Кл.слова (ненормированные):
Analysis of medical images -- Contour -- Denoising -- Image processing -- Medical image -- Shearlet -- Ureteroscopy -- Urolithiasis -- Wavelets -- Diagnosis -- Geometry -- Image processing -- Medical imaging -- Contour -- De-noising -- Shearlet -- Ureteroscopy -- Urolithiasis -- Wavelets -- Image analysis
Аннотация: A review of the basic concepts shearlet transform spatial data observations. The possibilities of the new approach for the geometric analysis of complex medical images. The proposed method can improve the radiological diagnosis of urological diseases by detailing changes of tissues. On the basis of the developed method of spectral data decomposition is performed solution of filtration problem and isolating contour studied medical target. The task of image contrast is also solved for the better understanding of the found geometric features and patterns.
Scopus
Держатели документа:
Electric and Electronic Department, Universidad de las Fuerzas Armadas ESPE, Av. Gral Ruminahui s/n, Sangolqui, Ecuador
College Juan Suarez Chacon, Quito, Ecuador
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
Institute of Computational Modelling, Siberian Branch, Russian Academy of Science, 50/44 Akademgorodok str., Krasnoyarsk, Russian Federation
Krasnoyarsk State Medical University, 1 Partizana Geleznyaka str., Krasnoyarsk, Russian Federation
Доп.точки доступа:
Cadena, L.; Cadena, F.; Kruglyakov, A.; Simonov, K.; Kapsargin, F.
Detection of a Pool in Semi-Continuous Castings Made of Heat-Treatable Aluminum Alloys
/ G. G. Krushenko, V. P. Nazarov // Russ. Metall. - 2017. - Is. 13. - P1087-1091, DOI 10.1134/S0036029517130146. - Cited References:20
. - ISSN 0036-0295. - ISSN 1555-6255
РУБ Metallurgy & Metallurgical Engineering
Аннотация: Various products (sheets, sections, etc.) manufactured by metal forming (rolled products, forged pieces, etc.) from semi-continuous castings are widely used in the aerospace industry. The so-called pool, which is the conical volume of a liquid metal, exists at the top of the liquid metal. Experience demonstrates that the geometry, the depth, and the shape of the pool substantially affect the structure formation in a casting and its quality. The application of a titanium nitride nanopowder, which is introduced in a melt in the volume of a rod, as a modifier allowed us to find the exact geometry of the pool.
WOS,
Смотреть статью,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Computat Modeling, Krasnoyarsk, Russia.
Siberian State Aerosp Univ, Krasnoyarsk, Russia.
Доп.точки доступа:
Krushenko, G. G.; Nazarov, V. P.
Аннотация: Various products (sheets, sections, etc.) manufactured by metal forming (rolled products, forged pieces, etc.) from semi-continuous castings are widely used in the aerospace industry. The so-called pool, which is the conical volume of a liquid metal, exists at the top of the liquid metal. Experience demonstrates that the geometry, the depth, and the shape of the pool substantially affect the structure formation in a casting and its quality. The application of a titanium nitride nanopowder, which is introduced in a melt in the volume of a rod, as a modifier allowed us to find the exact geometry of the pool.
WOS,
Смотреть статью,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Computat Modeling, Krasnoyarsk, Russia.
Siberian State Aerosp Univ, Krasnoyarsk, Russia.
Доп.точки доступа:
Krushenko, G. G.; Nazarov, V. P.