Výsledky vyhledávání - "T V, Koval'chuk"

Optimal Control for Some Classes of Dynamic Equations on the Infinite Interval of Time Scale

Autor: V. V. Mohyl’ova, O. E. Lavrova, T. V. Koval’chuk

Publikováno v: Journal of Mathematical Sciences. 254:229-245

We study a linear (in control) system of dynamic equations on an infinite interval of time scale and establish sufficient conditions for the existence of optimal controls in terms of the right-hand sides of the system and a function contained in the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3b8ef56bc847d511bda691dcdfb2c82f
https://doi.org/10.1007/s10958-021-05300-x

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Averaging Method in Problems of Optimal Control over Impulsive Systems

Autor: T. V. Koval’chuk, T. V. Shovkoplyas, V. V. Mohyl’ova

Publikováno v: Journal of Mathematical Sciences. 247:314-327

We apply the averaging method for the investigation of the problems of optimal control over impulsive systems. The procedure of averaging allows us to replace the original problem by the problem of optimal control over a system of ordinary differenti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::832080a409c4107440d94da782061141
https://doi.org/10.1007/s10958-020-04804-2

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Development of electric drive system with vector control in the facility of inter-stand cooling of sheet rolled product

Autor: T. V. Koval’chuk, K. V. Litsin

Publikováno v: Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information. 75:350-354

Modernization of the pusher electric drive of inter-stand cooling facility of sheet rolled product is an actual way to increase efficiency of rolling production. The control by the existing electric drive is accomplished by a system, comprising an as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b800848b005701e2e07b8b13e9dafdbb
https://doi.org/10.32339/0135-5910-2019-3-350-354

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Application of the Method of Averaging to the Problems of Optimal Control Over Functional-Differential Equations

Autor: V. I. Kravets, O. M. Stanzhyts’kyi, V. V. Mohyl’ova, T. V. Koval’chuk

Publikováno v: Ukrainian Mathematical Journal. 70:232-242

We study the application of the method of averaging to the problems of optimal control over functional differential equations. The procedure of averaging allows one to replace the original problem by the problem of optimal control over a system of or

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::698566f857e8c6a25fd9949187ebf4ea
https://doi.org/10.1007/s11253-018-1497-9

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Bentonites With Immobilized Organophosphorus Complexing Ligands As Adsorbents For The Removal Of Toxic Metals From Natural Water

Autor: L.S. Kostenko, T. V. Koval'chuk, O.A. Zaporozhets, Universitй de Bourgogne Franche-Comtй, Iryna Tomashchuk, Vladimir Zaitsev

Publikováno v: METHODS AND OBJECTS OF CHEMICAL ANALYSIS. 13:35-43

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5ba318b97d5333eac8758647d3e1ba2
https://doi.org/10.17721/moca.2018.35-43

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Existence of an Optimal Control for Systems of Differential Equations with Pulse Action at Nonfixed Times

Autor: T. V. Koval’chuk, A. O. Ivashkevych

Publikováno v: Journal of Mathematical Sciences. 228:245-262

For systems of differential equations with pulse action at nonfixed times, we establish the conditions for the existence of optimal control. These conditions depend on the right-hand sides of the system and the quality criterion.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bf8630635a4837fc4f2496599039aed9
https://doi.org/10.1007/s10958-017-3618-7

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Silver Nanoparticles Synthesized by Decomposition of a Silver Organic Complex with Valence Tautomerism and Their Properties

Autor: N.P. Osipovich, H. I. Harbatsevich, N.V. Loginova, T. V. Koval′chuk, Anna T. Gres

Publikováno v: Journal of Applied Spectroscopy. 84:13-18

Features of the formation of silver nanoparticles (Ag-NPs) via intramolecular redox transformation of the Ag(I) complex of 4,6-di-tert-butyl-2,3-dihydroxybenzaldehyde isonicotinoylhydrazone in organic solvents with donor numbers DN > 19 were studied.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c617dc31ae79900492313600890b0f4b
https://doi.org/10.1007/s10812-017-0419-1

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Spectroscopy of Bioactive Manganese(II) and Copper(II) Complexes with Mannich Bases

Autor: I.I. Azarko, Anna T. Gres, N.P. Osipovich, H. I. Harbatsevich, N.V. Loginova, G. I. Polozov, T. V. Koval′chuk

Publikováno v: Journal of Applied Spectroscopy. 82:713-718

The compositions and geometries of coordination polyhedra in Cu(II) and Mn(II) complexes with Mannich bases were determined using IR, EPR, and electron spectroscopy. It was shown that bidentate ligands were coordinated to the metal ions in these comp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d7e3aace32280967c3b85a8061e90b3f
https://doi.org/10.1007/s10812-015-0169-x

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Akademický článek

Optimal Control Over Systems of Functional-Differential Equations With Infinite Delay.

Autor: Stanzhytskyi, O. M.¹ (AUTHOR) ostanzh@gmail.com, Kichmarenko, O. D.² (AUTHOR), Mogylova, V. V.³ (AUTHOR), Koval'chuk, T. V.⁴ (AUTHOR)

Publikováno v: Ukrainian Mathematical Journal. Jun2023, Vol. 75 Issue 1, p157-173. 17p.

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