Zobrazeno 1 - 10 of 47 pro vyhledávání: '"A. L. Karchevsky"'
1
Akademický článek
Solution of the Inverse Problem of Subsurface Electric Exploration for Horizontally Stratified Medium
Autor: A. L. Karchevsky, Zh. O. Oralbekova, K. T. Iskakov
Publikováno v: Journal of Applied Mathematics, Vol 2013 (2013)
In this paper, we offer the generalization of the known technique of the construction of the gradient of the residual functional based on the statement of the conjugate problem for the case when the unknown function is complex valued. The notion of t
Externí odkaz: https://doaj.org/article/c3a6abde37654b489982220aa1ad48a5
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2
Akademický článek
CONTINUATION PROBLEM OF THE ELECTROMAGNETIC FIELD IN THE FREQUENCY DOMAIN FOR HORIZONTALLY LAYRED MEDIA.
Autor: I. M., Orman, I. G., Kurmashev, A. L., Karchevsky
Publikováno v: Eurasian Journal of Mathematical & Computer Applications (EJMCA); 2024, Vol. 12 Issue 3, p105-116, 12p
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5
New method to interpret the ‘canister test’ data for determining kinetic parameters of coalbed gas: theory and experiment
Autor: A. L. Karchevsky, Leonid Nazarov, Larisa A. Nazarova
Publikováno v: Inverse Problems in Science and Engineering. 29:2551-2560
The nonlinear model has been developed and implemented to describe gas emission from coal slack placed in a sealed container (‘canister test’). The model accounts for initial gas content S, coeffic...
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::838d7bf4e077f6a83324cf8491b26e08
https://doi.org/10.1080/17415985.2021.1936516
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6
Analytical Solutions to the Differential Equation of Transverse Vibrations of a Piecewise Homogeneous Beam in the Frequency Domain for the Boundary Conditions of Various Types
Autor: A. L. Karchevsky
Publikováno v: Journal of Applied and Industrial Mathematics. 14:648-665
We obtain an analytical solution for the differential equation of transverse vibrations of a piecewise homogeneous beam in the frequency domain for various types of boundary conditions. All calculations use only addition, multiplication, and inversio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::808b1ca13e8e8a9970a4f999032753d2
https://doi.org/10.1134/s1990478920040043
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7
Solution of the Convolution Type Volterra Integral Equations of the First Kind by the Quadrature-Sum Method
Autor: A. L. Karchevsky
Publikováno v: Journal of Applied and Industrial Mathematics. 14:503-512
Some algorithm is presented for solving the convolution type Volterra integral equation of the first kind by the quadrature-sum method. We assume that the integral equation of the first kind cannot be reduced to an integral equation of the second kin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7718578e6d948462fe422056ec1de3eb
https://doi.org/10.1134/s1990478920030096
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8
Numerical solving the herat equation with data on a time-like boundary for the heated thin foil technique
Autor: A. L. Karchevsky
Publikováno v: EURASIAN JOURNAL OF MATHEMATICAL AND COMPUTER APPLICATIONS. 8:4-14
In this paper, a numerical algorithm for solving the heat equation with data on a time-like boundary is presented. This result is necessary for the heated thin foil technique, which is used to study stationary and non-stationary transport processes i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c51a69150259d6187a8544a0b113046b
https://doi.org/10.32523/2306-6172-2020-8-4-4-14
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9
Heat Flux Density Evaluation in the Region of Contact Line of Drop on a Sapphire Surface Using Infrared Thermography Measurements
Autor: V. S. Sulyaeva, Igor Marchuk, Oleg Kabov, V. V. Cheverda, T. G. Gigola, A. L. Karchevsky
Publikováno v: Microgravity Science and Technology. 33
The paper presents a new tool “the method of IR transparent thick plate” that can be used to study the heat and mass transfer processes in the air-liquid-solid contact line area. Its distinctive feature as compared to the previously known methods
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ce59b0399b49b97ed0233062bc8d671a
https://doi.org/10.1007/s12217-021-09892-6
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10
A numerical method of determining permittivity from the modulus of the electric intensity vector of an electromagnetic field
Autor: V. G. Romanov, V. A. Dedok, A. L. Karchevsky
Publikováno v: Sibirskii zhurnal industrial'noi matematiki. 22:48-58
The system of equations of electrodynamics is considered for a nonmagnetic nonconducting medium. For this system, the problem is under study of determining the permittivity e from the given modulus of the electric intensity vector of the electromagne
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82b17665c5307ac24244c5c273ddf658
https://doi.org/10.33048/sibjim.2019.22.305
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