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Wyszukujesz frazę "Mironov, V." wg kryterium: Autor


Wyświetlanie 1-10 z 10
Tytuł:
Role of a biased electrode in the production of highly charged ions using the DECRIS 14-3 ion source
Autorzy:
Leporis, M.
Bogomolov, S.
Efremov, A.
Loginov, V.
Mironov, V.
Powiązania:
https://bibliotekanauki.pl/articles/148672.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ECR ion source
plasma
biased electrode
Opis:
ECR ion sources are used for the production of highly charged ions in various accelerator facilities. In most of them biased electrodes are normally used to increase the ion yield. Physical processes in the plasma of an ion source are quite complicated and the role of a biased electrode is not clear. To investigate the effect of a biased electrode on the intensity of extracted highly charged ions, an axially movable electrode was placed into the plasma chamber of the DECRIS 14-3 ion source. It was found that the intensity of Ar ions depends on the position of the biased electrode and negative bias voltage. The optimal position of the biased electrode was found near the maximum of the magnetic field. Experiments with a pulsed biased electrode were also carried out. The influence of the negative pulse on the ion yield depends on the ion charge state.
Źródło:
Nukleonika; 2003, 48,suppl.2; 89-92
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a mathematical model of the generalized diagnostic indicator on the basis of full factorial experiment
Autorzy:
Sychenko, V. G.
Mironov, D. V.
Powiązania:
https://bibliotekanauki.pl/articles/223935.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electricity
traction substation
maintenance
diagnostics
full factorial experiment
mathematical model
regression equation
Elektryczność
podstacja trakcyjna
konserwacja
diagnostyka
eksperyment czynnikowy
model matematyczny
równanie regresji
Opis:
Purpose. The aim of this work is to develop a mathematical model of the generalized diagnostic indicator of the technical state of traction substations electrical equipment. Methodology. The main tenets of the experiment planning theory, methods of structural-functional and multi-factor analysis, methods of mathematical and numerical modeling have been used to solve the set tasks. Results. To obtain the mathematical model of the generalized diagnostic indicator, a full factorial experiment for DC circuit breaker have been conducted. The plan of the experiment and factors affecting the change of the unit technical condition have been selected. The regression equation in variables coded values and the polynomial mathematical model of the generalized diagnostic indicator of the circuit breaker technical condition have been obtained. On the basis of regression equation analysis the character of influence of circuit breaker diagnostic indicators values on generalized diagnostic indicator changes has been defined. As a result of repeated performances of the full factorial experiment the mathematical models for other types of traction substations power equipment have been obtained. Originality. An improved theoretical approach to the construction of generalized diagnostic indicators mathematical models for main types of traction substations electric equipment with using the methods of experiments planning theory has been suggested. Practical value. The obtained polynomial mathematical models of the generalized diagnostic indicator D can be used for constructing the automated system of monitoring and forecasting of the traction substations equipment technical condition, which allows improving the performance of processing the diagnostic information and ensuring the accuracy of the diagnosis. Analysing and forecasting the electrical equipment technical condition with the using of mathematical models of generalized diagnostic indicator changes process allows constructing the optimal strategy of maintenance and repair based on the actual technical condition of the electrical equipment. This will reduce material and financial costs of maintenance and repair work as well as the equipment downtime caused by planned inspections and repair improving reliability and uptime of electrical equipment.
Źródło:
Archives of Transport; 2017, 43, 3; 125-133
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural – functional model of maintenance and repair of the traction substations equipment
Strukturalno-funkcjonalny model utrzymania i napraw wyposażenia podtsacji trakcyjnych
Autorzy:
Sychenko, V.
Mironov, D.
Białoń, A.
Powiązania:
https://bibliotekanauki.pl/articles/253653.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
traction substations
rail transport
efficiency
podstacja trakcyjna
transport kolejowy
efektywność
Opis:
To solve the problem of improving the quality control of substation equipment maintenance and repair process the structural and functional analysis for the distances of power supply has been performed. As a linguistic support for this task the International Standards Package Modeling IDEF (Icam Definition) has been used. It allows to analyze the process from three key perspectives at the same time – IDEFO (Integrated Definition for Function Modeling), IDEF3 and DFD (Data Flow Diagram). IDEF modeling is a way to reduce the amount of costly errors by structuring the process in the early stages of creating intelligent systems. It improves the communication between users and developers and smooth the transition from analysis to design. A complex task of equipment maintenance and repair process has been divided into a series of simple tasks on the basis of IDEF modeling. Structural - functional modeling with the selection of events has been done according to the IDEF0 methodology. Description of processes has been done according to the methodology IDEFЗ. DFD method has been used for building the data flow diagrams. Conducted structural-functional analysis has been shown that at some stages this process often requires the operational definition of different types of resources needed to perform repair work.
Źródło:
TTS Technika Transportu Szynowego; 2017, 11; 49-52
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Study of MBE Grown Undoped Si-Si$\text{}_{1-x}$Ge$\text{}_{x}$/Si Superlattices
Autorzy:
Gnezdilov, V. P.
Mironov, M.
Yshakov, V.
Mironov, O. A.
Phillips, P. J.
Parker, E. H. C.
Powiązania:
https://bibliotekanauki.pl/articles/1952678.pdf
Data publikacji:
1996-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.30.-j
78.66.-w
78.66.Db
Opis:
Raman spectroscopy and spectroscopic ellipsometry have been used to characterize Si/Si$\text{}_{0.78}$Ge$\text{}_{0.22}$ superlattices grown by molecular beam epitaxy on (001)Si at different substrate temperatures. The results are interpreted to give information on material and interface quality, layer thicknesses, and state of strain. The observed frequencies of zone-folded longitudinal acoustic phonons in a high quality sample agree well with those calculated using Rytov's theory of acoustic vibrations in layered media.
Źródło:
Acta Physica Polonica A; 1996, 90, 5; 1045-1049
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy Spectrum in Quantum Dots of Lead and Tin Chalcogenides Semiconducting Compounds
Autorzy:
Dugaev, V. K.
Litvinov, V. I.
Petrov, P. P.
Mironov, O. A.
Nashchekina, O. N.
Oszwałdowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1923782.pdf
Data publikacji:
1992-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.50.+t
71.90.+q
Opis:
The energy spectrum of a quantum dot made from IV-VI narrow gap semiconductors is studied. The calculations of the energy levels as functions of the dot radius are performed. When the anisotropy of the bare energy spectrum is strong, the energy levels are calculated using Fal'kovskii's adiabatic approximation for multiband systems. When the quantum dot material has an inverted band gap with respect to the host, the low-energy states within the fundamental gap are shown to arise.
Źródło:
Acta Physica Polonica A; 1992, 82, 5; 797-800
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of cultivation factors on embryogenesis in isolated microspore culture of carrot (Daucus carota L.)
Autorzy:
Voronina, Anastasia V.
Vishnyakova, Anastasiia V.
Monakhos, Sokrat G.
Monakhos, Grigory F.
Ushanov, Alexander A.
Mironov, Aleksey A.
Powiązania:
https://bibliotekanauki.pl/articles/2174344.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
carrot
Daucus carota L.
doubled haploids
embryogenesis
isolated microspore culture
male sterility
Opis:
Using doubled haploid technologies inbreeding can significantly reduce the time to obtain homozygous parental lines required for the production of F1-hybrid of vegetable crops. This study aims to investigate the influence of factors on the efficiency of carrot embryogenesis in isolated microspore culture to optimise the elements of protocol for producing doubled haploids. Microspores were isolated from inflorescences of 21 genotypes and incubated in NLN13 medium supplemented with 0.1 mg·dm-3 2,4-dichlorophenoxyacetic acids, 0.1 mg·dm-3 1-naphthyl acetic acids, 130 g·dm-3 sucrose, and 400 mg·dm-3 casein hydrolysate and its modifications. Embryoids and their groups were formed after 2–6 months, in some cases after 12 months of cultivation. Depending on the variant, the embryogenesis efficiency averaged from 0 to 4.9 embryoids or groups of embryoids per Petri dish (10 cm3). Embryoids within the group were formed from different microspores. No significant effects of inflorescence position on the plant (branching order), sucrose, and casein hydrolysate concentration in the medium were observed. Significant advantages (p ≥ 0.05) for some genotypes were shown: 1) microspore suspension density 4·104 cells·cm-3 (5.0 embryoids per Petri dish were formed at a microspore suspension density of 4·104 cells·cm-3, 0.0 embryoids per Petri dish at a density of 8·104 cells·cm-3); 2) cultivating microspores of tetrad and early mononuclear stage (4.9 ±3.1 embryoids per Petri dish were obtained by culturing tetrads and early mononuclear microspores, while 0.6 ±0.7 embryoids per Petri dish were obtained by culturing of later developmental stages); 3) high-temperature treatment duration of five days (4.9 ±2.1 embryoids per Petri dish were obtained after five days of high-temperature treatment, 2.7 ±2.6 embryoids per Petri dish formed after two days of high-temperature treatment; 9.8 ±4.7, 10.1 ±6.1, 0.0 ±0.0 embryoids per Petri dish formed after two, five and eight days of high-temperature treatment respectively); 4) adding colchicine 0.5 mg·dm-3 to the nutrient medium for two days of high-temperature treatment, followed by medium replacement (3.3 ±2.6 embryoids per Petri dish were obtained by using a nutrient medium with colchicine, while 1.7 ±1.5 embryoids per Petri dish were obtained by culturing in the reference variant).
Źródło:
Journal of Water and Land Development; 2022, 55; 125--128
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SnTe Phase Transition in Strained Superlattices PbTe/SnTe
Autorzy:
Mironov, O. A.
Makarovskii, O. N.
Nashchekina, O. N.
Shpakovskaya, L. P.
Litvinov, V. I.
Oszwałdowski, M.
Berus, T.
Powiązania:
https://bibliotekanauki.pl/articles/1933932.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.-p
73.40.-c
Opis:
An anomaly of the in-plane conductivity is observed in the superlattices PbTe/SnTe on (001)KCl in the temperature region of 60-130 K. The anomaly is caused by a structural phase transition in SnTe layer and as a result, the transition induced formation of defects. These defects are additional scattering centres which decrease the superlattice conductivity.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 853-856
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Piezoelectric Effect in Coherently Strained B-Doped (001)SiGe/Si Heterostructures
Autorzy:
Knizhny, V. I.
Mironov, O. A.
Makarovskii, O. A.
Braithwaite, G.
Mattey, N. L.
Parker, E. H. C.
Phillips, P. J.
Powiązania:
https://bibliotekanauki.pl/articles/1933806.pdf
Data publikacji:
1995-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.50.Rb
73.61.Cw
73.50.Μx
Opis:
We report on two methods which illustrate piezoelectric effects in the strained Si (100)Si $\text{}_{1-x}$/Ge$\text{}_{x}$ system. The non-contact sound excitation technique has been used to reveal the conversion of a high-frequency electric field E into acoustic waves at 77 K which can also be modulated by a dc applied bias voltage (±30 V). The sample was an MBE grown modulation doped Si $\text{}_{0.88}$Ge$\text{}_{0.12}$/(001)Si structure with a carrier sheet density 2.0 × 10 $\text{}^{11}$ cm$\text{}^{-2}$ and a 4.2 K mobility 10500 cm$\text{}^{2}$ V$\text{}^{-1}$ s$\text{}^{-1}$. We deduce that the observed high-frequency electric field acoustic wave conversion is associated with a piezoelectric-like effect possibly due to ordering in the strained SiGe alloy or symmetry breaking effect near Si/SiGe interface. Further evidence is provided by the existence of a piezoelectric phonon interaction in the hot hole energy relaxation mechanism determined from high electric field Shubnikov de Haas He$\text{}^{3}$ low temperature measurements.
Źródło:
Acta Physica Polonica A; 1995, 88, 4; 779-782
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Progress in stellarator research at IPP-Kharkov
Autorzy:
Moiseenko, V. E.
Lozin, O. V.
Shapoval, A. M.
Dreval, M. B.
Kulyk, Y. S.
Mironov, Y. K.
Romanov, V. S.
Pashnev, V. K.
Sorokovoy, E. L.
Petrushenya, A. A.
Ozherel’ev, F. I.
Kozulya, M. M.
Konovalov, V. G.
Maznichenko, S. M.
Garkusha, I. E.
Powiązania:
https://bibliotekanauki.pl/articles/146173.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
stellarator
radio-frequency heating
low frequency modes
magnetic diagnostics
Opis:
A new antenna of ‘crankshaft’ type has been installed in the Uragan-2M device in order to increase the plasma density and heating below the ion cyclotron frequency. Antenna operation is modelled by 1D code, which solves boundary problem for time-harmonic Maxwell’s equations in radially non-uniform plasma cylinder. In recent experiments with this antenna, the SXR, CV, OV and OII emission measurements indicate that the light impurity radiation barrier is overcame at this device. Plasma with a temperature of ~50 eV exists during a short period of a few milliseconds. Then the radiation collapse comes owing to strong infl ux of impurities to the plasma column. A new magnetic diagnostics has been installed at Uragan-3M. Using it the poloidal magnetic fi eld is measured and the shift of toroidal current in major radius is registered. A miniature pinhole camera array for spatially and temporally resolved measurements of soft X-ray (SXR) plasma emission has been recently installed on the U-3M. Different shapes of the SXR emission profi le has been observed in different discharge conditions.
Źródło:
Nukleonika; 2016, 61, 2; 91-97
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superconductivity of Non-Strained PbTe-PbS and Strained PbTe-SnTe Superlattices
Autorzy:
Mironov, O. A.
Chistyakov, S. V.
Fedorenko, A. I.
Shpakovskaya, L. P.
Sipatov, A. Yu.
Savitskii, B. A.
Nashchekina, O. N.
Oszwałdowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1890800.pdf
Data publikacji:
1991-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.-c
73.60.Fw
74.60.-w
Opis:
A comparative study of structural and superconductive properties of semi conductor epitaxial superlattices PbTe-SnTe and PbTe-PbS grown on (001) KCl has been carried out. It has been found that the superconductivity of the PbTe-SnTe superlattices is caused by the stretching strain in the SnTe layers and it may be connected with the relative positions of L$\text{}_{8}^{+}$ and L$\text{}_{6}^{+}$ terms of PbTe and SnTe, respectively in the heterojunction. In contrast to the PbTe-SnTe superlattices, the superconductivity of the PbTe-PbS super lattices is found to be associated with regular misfit dislocation grids which are generated at the interfaces.
Źródło:
Acta Physica Polonica A; 1991, 80, 3; 329-332
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-10 z 10

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