Zobrazeno 1 - 10 of 21 pro vyhledávání: '"A. I. Piskarev"'
1
Akademický článek
Production of 22Na isotope using a device designed to irradiate a target with the internal proton beam of the U-240 cyclotron
Autor: L. V. Mykhailov, M. V. Makovskyi, A. I. Piskarev, V. M. Shevel, Yu. V. Falchenko, L. V. Petrushynets, V. E. Fedorchuk
Publikováno v: Âderna Fìzika ta Energetika, Vol 25, Iss 1, Pp 89-92 (2024)
An installation for obtaining isotopes using the intense internal beam of protons on the U-240 cyclotron has been developed. A target was designed to produce the 22Na isotope under difficult conditions of thermal and radiation loads in a limited spac
Externí odkaz: https://doaj.org/article/a320b9d7ba604f379dd3e8f5111358c8
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2
Akademický článek
Irradiation facility for production of 82Sr isotope on isochronous cyclotron U-240
Autor: L. V. Mikhailov, A. I. Ustinov, L. G. Makarenko, A. I. Piskarev, O. M. Kovalev
Publikováno v: Âderna Fìzika ta Energetika, Vol 17, Iss 4, Pp 425-429 (2016)
Investigations allowing obtaining of 82Sr isotope upon irradiation of target RbCl by internal proton beam in the cyclotron U-240 were performed. The facility, providing long exposure of the target RbCl upon internal proton beam with the intensity of
Externí odkaz: https://doaj.org/article/5c724236cb9349278066c7cfd70ae6c2
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5
Finite-Difference Methods for Fractional Differential Equations of Order 1/2
Autor: M. Spreafico, S. I. Piskarev, M. Yu. Kokurin
Publikováno v: Journal of Mathematical Sciences. 230:950-960
In this work, we study approximations of solutions of fractional differential equations of order 1/2. We present a new method of approximation and obtain the order of convergence. The presentation is given within the abstract framework of a semidiscr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eee17ca9d46e6242bb42c780c3d0ced8
https://doi.org/10.1007/s10958-018-3800-6
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6
On Approximation of Coefficient Inverse Problems for Differential Equations in Functional Spaces
Autor: S. I. Piskarev, D. G. Orlovsky
Publikováno v: Journal of Mathematical Sciences. 230:823-906
This paper is devoted to the theory of approximation of coefficient inverse problems for differential equations of parabolic, elliptic, and hyperbolic types in functional spaces. We present general statements of problems and their approximations and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5816caadbd13acad8f14c811837593e6
https://doi.org/10.1007/s10958-018-3798-9
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7
Integrated Semigroups and C-Semigroups and their Applications
Autor: S. I. Piskarev, N. Yu. Selivanova, V. V. Vasil’ev
Publikováno v: Journal of Mathematical Sciences. 230:513-646
In this survey, some interesting generalizations of the theory of C0-semigroups and their applications are presented. The survey is divided into three parts: “Integrated semigroups,” “C-semigroups,” and “Applications.” Different approache
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e82dde767ff5078c0b5608060edde865
https://doi.org/10.1007/s10958-018-3760-x
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9
The exponential dichotomy on general approximation scheme
Autor: S. I. Piskarev, V. Pastor
Publikováno v: Journal of Mathematical Sciences. 193:548-565
This paper is devoted to the numerical analysis of abstract parabolic problems u′(t) = Au(t), u(0) = u 0 with hyperbolic generator A. We develop a general approach to establish a discrete dichotomy in a very general setting in the case of discrete
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb1e71a84b69438520239c4782e6ebc3
https://doi.org/10.1007/s10958-013-1482-7
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10
Approximation of the Bitsadze-Samarskii inverse problem for an elliptic equation with the dirichlet conditions
Autor: D. G. Orlovskii, S. I. Piskarev
Publikováno v: Differential Equations. 49:895-907
An inverse problem for an elliptic equation in a Banach space with the Bitsadze-Samarskii conditions is considered. The suggested approach uses the notion of a general approximation scheme, the theory of C0-semigroups of operators, and methods of fun
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ad146afa4aa34c0637fe157bfb38146
https://doi.org/10.1134/s0012266113070112
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