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Математическое моделирование свободной конвекции вертикальной пластины в сопряженной постановке
Международный журнал прикладных и фундаментальных исследований. 2015. № 4. С. 25–28.
Madera A. G.
Донецк: Донецкий национальный технический университет, 2024.
по материалам XV Международной научно-технической конференции «Информатика, управляющие системы, математическое и компьютерное моделирование-2024» (ИУСМКМ-24) ...
Added: November 18, 2024
Dubnov Y. A., Bulychev A., Информационные технологии и вычислительные системы 2023 № 1 С. 71–81
In this paper, we investigate a method of approximate entropy estimation, designed to speed up the classical method of maximum entropy estimation due to the use of regularization in the optimization problem. This method is compared with the method of maximum likelihood and Bayesian estimation, both experimentally and in terms of theoretical calculations for some ...
Added: June 16, 2023
Dubnov Y. A., Bulychev A., Информационные технологии и вычислительные системы 2022 № 4 С. 69–80
The work is devoted to the development of an entropy estimation method with “soft” randomization for restoring the parameters of probabilistic mathematical models from the available observations. Soft randomization refers to the technique of adding regularization to the information entropy functional to simplify the optimization problem and speed up learning process compared to the traditional ...
Added: June 16, 2023
Абрамешин Д.А., Пожидаев Е.Д., Саенко В.С. et al., Известия вузов. Электроника. РФ 2022 Т. 27 № 5 С. 635–644
The electrons of the cosmic plasma act on spacecraft, causing the electrification of their dielectric materials. The result of the accumulation of charge is the occurrence of electrostatic discharges leading to failures in the operation of on-board radio electronics, and this phenomenon significantly reduces the duration of the active existence of spacecraft. One of the ...
Added: November 2, 2022
Тумковский С. Р., Муллахметов И.Р., Пожидаев Е.Д. et al., Информационные технологии 2022 Т. 28 № 5 С. 233–239
A technique for identifying a model of radiation conductivity of polymeric materials for chip packages of microelectronic equipment has been developed. On the basis of the developed technique, computer simulation of radiation charging of polymer cases of microelectronic equipment with increased conductivity was carried out. The research results are aimed at the development of composite ...
Added: June 1, 2022
Abrameshin D., Pozhidaev E., Tumkovskiy S., Информационные технологии 2021 Т. 27 № 2 С. 59–64
A model and a method of mathematical modeling of radiation charging of polymer cases of microelectronic equipment with increased conductivity are developed, which are based on the application of the approximation function of the experimental dependence of the case conductivity on the irradiation time obtained using parametric identification methods. The research results are aimed at ...
Added: June 28, 2021
Kurennoy D., Голембиовский Д. Ю., M.: Max press, 2018.
This work discusses a possibility to assess the probability of company default using system dynamic model. This approach is based on Monte Carlo Simulation with various inputs for a system dynamic model. The results are compared with the estimations of rating agencies. ...
Added: October 14, 2019
Madera A. G., Кандалов П. И., Акжолов М. Ж., Труды НИИСИ РАН 2017 Т. 7 № 4 С. 47–56
В настоящее время при тепловом проектировании электронных систем, проведении математического и компьютерного моделирования, принимается допущение о незначительности влияния радиационной составляющей теплообмена на распределения температур. В данной работе приведены результаты численного моделирования влияния различных механизмов теплообмена (конвекции, радиации и кондукции) на интервально стохастические тепловые процессы в электронных системах. Исследования показали, что радиационная составляющая теплообмена вносит значительный ...
Added: October 29, 2018
Н. Новгород: Изд-во ННГУ им. Н.И. Лобачевского, 2016.
В сборник включены материалы докладов научной конференции, проходившей на радиофизическом факультете ННГУ с 12 по 20 мая 2016 г. Доклады охватывают основные научные направления, развиваемые кафедрами факультета. Работы выпол- нены сотрудниками, студентами, магистрантами и аспирантами ННГУ и других ор- ганизаций радиофизического и технического профиля. Печатается по решению Уче- ного Совета радиофизического факультета ННГУ в рамках ...
Added: January 26, 2017
Madera A. G., Информационные технологии моделирования и управления 2015 № 2(92) С. 99–108
Модели конвективного теплообмена, используемые в существующих программных комплексах для теплового проектирования электронных систем, основаны на концепции линейного уравнения теплообмена Ньютона и коэффициенте теплоотдачи, что, однако, не позволяет адекватно моделировать реальные конвективные процессы. В статье предлагается подход, развитие которого позволит разрабатывать адекватные модели конвективного теплообмена в электронных системах. Подход основан на сопряженной формулировке математической модели конвективного ...
Added: August 19, 2016
Масленникова И. С., Грищенко Т. Ю., Вестник Международной академии наук экологии и безопасности жизнедеятельности (МАНЭБ) 2009 Т. 14 № 1 С. 154–159
The article considers the issues of prognosticating end providing fire safety of one of the most important natural resources – peat-bog ecosystems – and the task of fire prognostication, treated on the basis of systems analysis. The analysis of thermo-chemical processes of peat surface combustion involving generation of combustible gases was made, which makes it ...
Added: February 6, 2015
Mainichev D. A., Sokolov M. N., Adonin S. A. et al., Zeitschrift für anorganische und allgemeine Chemie (Германия) 2014 Vol. 640 No. 1 P. 122–127
A new synthetic entry to iridium Keggin-type polyoxometalate complexes from [PW11O39]7– and K3[IrCl6] under harsh conditions is reported. The complex [PW11O39IrCl]5– (15–) featuring an IrCl functionality was obtained in high yield and characterized by NMR spectroscopic and ESI-MS techniques. The presence of Li+ (3–4 M) is essential for a quantitative yield of 15–. The reactivities ...
Added: November 14, 2014
Mainichev D. A., Vicent C., Adonin S. A. et al., European Journal of Inorganic Chemistry 2014 No. 32 P. 5618–5624
The gas-phase fragmentation reactions of Keggin-type [PW11O39MCl]5– (M = Rh, Ir) polyoxometalates (POMs) featuring chloride terminal ligands have been investigated. Different adducts of the general formulas [PW11O39MCl + 2cat]3– and [PW11O39MCl + 3cat]2– [cat = alkylammonium cations (Me4N+, Bu4N+), alkali cations (Na+, K+) or protons] were subjected to collision-induced dissociation (CID) conditions. The (cat)Cl (cat ...
Added: November 14, 2014
Mainichev D. A., Sokolov M. N., Rogachev A. V. et al., Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya 2014 Vol. 40 No. 7 P. 460–467
Alkyl xanthate complexes [Nb2S4(S2COR)4] (R = Et (I), iso-Pr (II), n-Bu (III), and iso-Am (IV)) are synthesized by the ligand exchange reaction in solutions from (Et4N)4[Nb2S4(NCS)8] and the corresponding potassium salts in satisfactory yields. The X-ray diffraction analyses are carried out for the isopropyl xanthate (II) and butyl xanthate (III) complexes. From the view point ...
Added: November 14, 2014
Mainichev D. A., Anyushin A. V., Smolentsev A. I. et al., Chemical Communications 2014 Vol. 50 No. 65 P. 9083–9085
The first Keggin-type Be-containing heteropolyanion [BeW12O40]6− (16−) has been obtained by hydrothermal synthesis from sodium tungstate and Be(NO3)2. It was crystallized as (Bu4N)4.8Na1.2[BeW12O40] (1a) and (Me2NH2)6[BeW12O40]·4H2O (1b) salts, which were characterized by 9Be and 183W NMR, ESI-MS, CV, and single crystal X-ray diffraction analysis. ...
Added: November 14, 2014
Mainichev D. A., Sokolov M. N., Adonin S. A. et al., Inorganic Chemistry 2013 Vol. 52 No. 16 P. 9675–9682
New Ru-substituted Keggin-type polyoxometalate complex containing nitroso ligand, [PW11O39Ru(NO)]4-, has been prepared. It is converted by hydrazin or hydroxylamine into aqua complex [PW11O39RuIII(H2O)]4- in quantitative yield. Intermediate complex of dinitrogen has been detected. Sn2+ converts [PW11O39Ru(NO)]4- into [PW11O39Ru(NH3)]4-. ...
Added: November 13, 2014
Mainichev D. A., Anyushin A. V., Sokolov M. N. et al., Inorganic Chemistry Communications (США) 2012 Vol. 24 P. 225–226
Reaction of CoCl2·6H2O and P(CH2OH)3 with H2S in ethanol produces a new water-soluble hexanuclear cluster [Co6S8(P(CH2OH)3)6]·5H2O (1). Reaction of 1 with acetic anhydride gives [Co6S8(P(CH2O(O)CCH3)3)6]·H2O (2). Complex 2 was characterized by 31P, 13C and 1H NMR, X-ray structure analysis, UV–vis. Reaction of 1 with propionic anhydride gives [Co6S8(P(CH2O(O)CCH2CH3)3)6] (3) which was characterized by 31P, 13C ...
Added: November 13, 2014
Mainichev D. A., Korenev V. S., Abramov P. A. et al., Dalton Transactions 2012 Vol. 41 P. 14484–14486
Reaction between monolacunary {BW11} tungstoborate and oxothiocationic building block, {Mo2O2S2}, results in the formation of a new polyoxothiometalate with a unique architecture in which two [H2BW12O43]9− tungstoborate subunits are linked together with a hexamolybdate [MoV6O6S6(OH)4(H2O)2]2+ bridge. ...
Added: November 13, 2014
Mainichev D. A., Sokolov M. N., Adonin S. A. et al., Chemical Communications 2012 Vol. 48 No. 53 P. 6666–6668
A sandwich-type rhodium polyoxotungstate with unprecedented tetrarhodium-oxo core Na12[(Rh4(μ3–O)2(H2O)2)(H2W9O33)2]·38H2O (1) was obtained by hydrothermal reaction of rhodium(II) acetate and sodium tungstate; crystal structure was determined by X-ray diffractometry and was confirmed by 183W NMR data is active in electrocatalytic water oxidation. ...
Added: November 13, 2014
Mainichev D. A., Sokolov M. N., Adonin S. A. et al., Dalton Transactions 2012 Vol. 41 No. 33 P. 9889–9892
ESI-MS based methodology for the rapid reactivity screening of [PW11O39RhCl]5− and [PW11O39Ir(H2O)]4− toward various metalation-intended substrates (reagents with an activated C–H bond, boronic acids and organotin compounds) is presented. Formation of a series of new organometallic POM derivatives with Rh–R (R = malonate, phenylacetate, CH3, Ph, ferrocenyl) and Ir–R (R = CH3) bonds is reported. ...
Added: November 13, 2014
Елец: Елецкий государственный университет им. И.А.Бунина, 2014.
В сборнике представлены материалы V Международной научной конференции, посвященной 90-летию со дня рождения выдающегося ученого, генерального конструктора ракетно-космических систем академика В.Ф. Уткина, проходившей в ЕГУ им. И.А. Бунина 13-14 мая 2014 г. Включенные в сборник материалы отражают теоретические аспекты, практический опыт и современные тенденции обеспечения системной безопасности. ...
Added: September 3, 2014