Zobrazeno 1 - 10
of 17
pro vyhledávání: '"O. V. Kozelkov"'
Publikováno v:
Известия высших учебных заведений: Проблемы энергетики, Vol 24, Iss 3, Pp 158-174 (2022)
THE PURPOSE. Currently, brushless motors – electric machines with permanent magnets on the rotor and a rotor position sensor controlled by a sinusoidal voltage from frequency converters, are widely used in mechatronic and robotic systems. The contr
Externí odkaz:
https://doaj.org/article/9a702a31583a420fbb384e45dd402aae
Publikováno v:
Известия высших учебных заведений: Проблемы энергетики, Vol 24, Iss 1, Pp 126-140 (2022)
The parameters of electromechanical converters functioning as part of working sets can change as a result of the influence externa factors, such as changes in the characteristics of the environment. Changes in parameters also occur due to parametric
Externí odkaz:
https://doaj.org/article/0ea6fb3c1c874e3e91a7ffd815c82e08
Publikováno v:
Известия высших учебных заведений: Проблемы энергетики, Vol 21, Iss 6, Pp 111-117 (2020)
In this paper described the switching power supply (SPS) unit and represented its importance for electronic circuits in electronic devices. SPS directly affect the operation of electrical circuits and electronic equipment. In particular, this paper d
Externí odkaz:
https://doaj.org/article/a7ad417f3aa04340ad87475115e548d9
Publikováno v:
Известия высших учебных заведений: Проблемы энергетики, Vol 19, Iss 5-6, Pp 119-131 (2017)
In the paper described system of automotive control of installation of rotary pump of oil-mining using parameters of oil-well liquid, measured by on-line proton magnetic resonance analyzer. Described theoretical basis of the system and its practical
Externí odkaz:
https://doaj.org/article/38559b9d9c1943bd84ea9418be1dfff8
Publikováno v:
Известия высших учебных заведений: Проблемы энергетики, Vol 19, Iss 1-2, Pp 137-151 (2017)
In the work described flow analyzer on the base of proton magnetic-resonance (PMR) allowing on-line, without sample preparation automatically perform express-control and analysis of oil-well liquid control. Presented elaborated control methods, corre
Externí odkaz:
https://doaj.org/article/78549f65b0444e558eea87e8331bb905
Autor:
R. S. Kashayev, O. V. Kozelkov, Z. S. Idiyatullin, A. N. Temnikov, E. N. Ozherelyeva, E. V. Perelevsky
Publikováno v:
Известия высших учебных заведений: Проблемы энергетики, Vol 19, Iss 3-4, Pp 159-167 (2017)
Made ananalysis of contemporary laboratory devices and methods of control and analysis of paraffin ’s concentration in oils and oil products. Obtined NMR-spectra of standard and natural oil samples. Made an analysis of spectra line parameters. Esta
Externí odkaz:
https://doaj.org/article/914295039a2c4d9baee1008da8e23ddd
Publikováno v:
Petroleum Chemistry. 59:S21-S29
The physicochemical properties of crude oils (density, viscosity, asphaltene concentrations) from the Bach Ho oilfield (Vietnam) have been correlated with 1H NMR relaxation parameters (spin–lattice and spin–spin relaxation times T1i and T2i, resp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ea30d5faa56dfd281a4acd12276fdd6
https://doi.org/10.1134/s0965544119130073
https://doi.org/10.1134/s0965544119130073
Using method of pulse nuclear magnetic resonance relaxometry (NMRR) were studied paraffins in Romashkino deposit oils (Republic of Tatarstan, Russian Federation) and oils of BaCH-Ho deposit (Vietnam). As a studied samples was used Romashkino oils, in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ac8da9f469a31b7e69c80911aabe54e
https://doi.org/10.9734/bpi/naer/v7/2354f
https://doi.org/10.9734/bpi/naer/v7/2354f
Publikováno v:
Journal of Applied Spectroscopy. 86:890-895
We have used proton magnetic resonance relaxometry to study the dependences of the spin–lattice and spin–spin relaxation times T1,2 on viscosity and concentration of asphaltenes + resins in crude oils, in particular from the Bach Ho field (Vietso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02cc4ba039b833c74d42aea5bc2bd779
https://doi.org/10.1007/s10812-019-00911-4
https://doi.org/10.1007/s10812-019-00911-4
Publikováno v:
Journal of Applied Spectroscopy. 86:289-293
Methods for calculating the mean molecular mass (MM) from the density are analyzed. The density ρ of crude oils was determined experimentally as a function of proton spin–lattice (T1H) and spin–spin relaxation times (T2H). The dependences of MMs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac1cebd1714da89ba115b3997b1403ff
https://doi.org/10.1007/s10812-019-00814-4
https://doi.org/10.1007/s10812-019-00814-4