Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Zhemerov, A."'
Autor:
Hanna Shynkarenko, Alexander Zhemerov
Publikováno v:
Problemi Bezperervnoï Geografìčnoï Osvìti ì Kartografìï, Iss 34 (2021)
Introduction. The study of geography in modern conditions is very important for the development of youth and the nation as a whole. There is a growing need in the society to study geographical science at a level higher than the standard one. At prese
Externí odkaz:
https://doaj.org/article/208a09204cbf43fb9ff37fb1da81ddd0
Publikováno v:
Electrical engineering & Electromechanics, Iss 5, Pp 25-30 (2019)
Purpose. The purpose of the paper is to assess the efficiency of the subway power supply system, which uses a four-quadrant DC drive with energy recovery in the supply network in the braking mode. Methodology. We have applied the theory of electrical
Externí odkaz:
https://doaj.org/article/6b21fc8966254110b3b38cf2120ca5ed
Publikováno v:
Problemi Bezperervnoï Geografìčnoï Osvìti ì Kartografìï, Iss 32 (2021)
Космічні знімки займають усе більше місце в науках про Землю. Повною мірою це стосується і географії. Зображення Землі з космосу викорис
Externí odkaz:
https://doaj.org/article/306b6f5ca489461c9ea8e936210a3ef0
Autor:
George G. Zhemerov, D. S. Krylov
Publikováno v:
Electrical engineering & Electromechanics, Iss 6, Pp 26-32 (2018)
Goal. The goal of the paper is to study the peculiarities of building power circuits of a modular multilevel converter (MMC) of electrical energy for DC transmission lines, to investigate its operating principles and basic characteristics. Methodolog
Externí odkaz:
https://doaj.org/article/c708d23cbf904c92ae4730f08d350855
Autor:
Vera Sprenne, Alexander Zhemerov
Publikováno v:
Problemi Bezperervnoï Geografìčnoï Osvìti ì Kartografìï, Iss 28, Pp 74-83 (2018)
У статті розглянуто складову вивчення міжнародних економічних відносин (МЕВ) у діючих навчальних програмах з географії. Висвітлено осо
Externí odkaz:
https://doaj.org/article/1ed45928bdbd4c5a8604057f17a3c539
Publikováno v:
Problemi Bezperervnoï Geografìčnoï Osvìti ì Kartografìï, Iss 30 (2019)
Мета даної статті - висвітлити методику формування метеоролого-кліматичних понять у шкільній географії шляхом використання нових засо
Externí odkaz:
https://doaj.org/article/bd5b5404d9234eefb72978720816c568
Autor:
G.G. Zhemerov, D.V. Tugay
Publikováno v:
Electrical engineering & Electromechanics, Iss 2, Pp 11-19 (2016)
Purpose. To obtain relations determining the components of the total losses power with p-q-r power theory for three-phase four-wire energy supply systems, uniquely linking four components: the lowest possible losses power, losses power caused by the
Externí odkaz:
https://doaj.org/article/3d9ad8e14d9d4185985635b4ff30d539
Autor:
G.G. Zhemerov, D.V. Tugay
Publikováno v:
Electrical engineering & Electromechanics, Iss 6, Pp 36-42 (2015)
Purpose. The contradictions in the use of the term «reactive power» require justification by clarifying its physical meaning. The aim of the paper is to reveal the physical meaning of the term «reactive power» applied to three-phase three-wire an
Externí odkaz:
https://doaj.org/article/6739aa774202428a94c08e1e536e013e
Autor:
G.G. Zhemerov, D.V. Tugay
Publikováno v:
Electrical engineering & Electromechanics, Iss 4, Pp 28-34 (2015)
Purpose. Three-phase energy supply system with a symmetrical resistive load operates in mode with the highest possible efficiency in a case of zero instantaneous reactive power and the absence of pulsations instantaneous active power. When load param
Externí odkaz:
https://doaj.org/article/7da6d5a2a69c4a9e80779aa134acc13d
Autor:
G.G. Zhemerov, I.O. Lobach
Publikováno v:
Electrical engineering & Electromechanics, Iss 5, Pp 45-49 (2014)
Analytical dependences of such efficiency indices as energy loss power and copper consumption under transition from single-phase power distribution systems to three-phase ones are obtained.
Externí odkaz:
https://doaj.org/article/ad79e53054694c2a8a75c2f9a3999db5