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Wyszukujesz frazę "Petrov, S." wg kryterium: Autor


Wyświetlanie 1-9 z 9
Tytuł:
Population Loss in Closed Optical Transitions οf Rb and Cs Atoms Confined in Micrometric Thin Cells
Autorzy:
Biancalana, V.
Cartaleva, S.
Dancheva, Y.
Gosh, P.
Mariotti, E.
Mitra, S.
Moi, L.
Petrov, N.
Ray, B.
Sarkisyan, D.
Slavov, D.
Powiązania:
https://bibliotekanauki.pl/articles/1791199.pdf
Data publikacji:
2009-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.30.-r
32.70.Jz
Opis:
We present the first experimental observation of narrow dips in the fluorescence profiles of completely closed hyperfine transitions in Rb vapor at high atomic density, which is attributed to the depolarization of the excited state. Moreover, at low atomic density, a narrow peak on the top of the fluorescence profile is demonstrated, centered at the completely closed transition within the $D_{2}$ line of Cs. Experiments are performed in thin (700 μm) alkali cell by single light beam spectroscopy. The cell is filled with Cs containing a small portion of Rb.
Źródło:
Acta Physica Polonica A; 2009, 116, 4; 495-497
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
All-Optical Magnetometer Based on Resonant Excitation of Rubidium Atoms by Frequency Modulated Diode Laser Light
Autorzy:
Cartaleva, S.
Karaulanov, T.
Petrov, N.
Slavov, D.
Vaseva, K.
Yanev, A.
Mijailovic, M.
Grujic, Z.
Jelenkovic, B. M.
Powiązania:
https://bibliotekanauki.pl/articles/2047842.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.50.Gy
07.55.Ge
Opis:
Magnetic field and its gradient measurements based on coherent population trapping resonances at the D$\text{}_{1}$ line of $\text{}^{87}$Rb are performed by means of coupling two ground-state Zeeman sublevels belonging to different hyperfine levels to a common excited state. Two coherent laser fields with frequency difference of 6.8 GHz are used. They are produced by direct current modulation of a diode laser. The resonance splitting and broadening caused by the applied magnetic field is measured by scanning the laser modulation frequency around the ground-state hyperfine frequency.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 871-876
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the Environmental Condition of Minor Rivers in Urban Areas
Autorzy:
Kuznetsov, V. S.
Petrov, D.S.
Powiązania:
https://bibliotekanauki.pl/articles/124132.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sediment pollution
minor rivers
oil product pollution
environmental monitoring
heavy metal pollution
Opis:
This article is devoted to the study of water and sediment pollution in the channel of the Neva delta. Spectrophotometry was used to determine the concentration of pollutants in water. In the chemical analysis of the precipitate, atomic absorption spectroscopy and infrared spectroscopy were used. Analysis of the hydrochemical composition and sediment of the Smolenka River showed high concentrations of heavy metals and petroleum products. At the same time, the hydrochemical composition of the Smolenka River is highly unstable, but the concentration of oil products and lead in the sediments indicates the presence of local pollution sources. Based on our findings, we are guided by the restoration of the aquatic environment.
Źródło:
Journal of Ecological Engineering; 2017, 18, 6; 110-114
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of dense plasma streams generated by MPC and their interaction with material surfaces
Autorzy:
Makhlaj, V. A.
Chebotarev, V. V.
Chuvilo, A. A.
Garkusha, I. E.
Ladygina, M. S.
Marchenko, A. K.
Petrov, Y. V.
Solyakov, D. G.
Powiązania:
https://bibliotekanauki.pl/articles/147528.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
magneto-plasma compressor (MPC)
gas-discharge plasma
plasma streams
mixture gas
EUV radiation
surface damage
Opis:
Comparative studies of the parameters both pure helium and helium-xenon plasma have been fulfilled in a magneto-plasma compressor (MPC). The current-voltage characteristics of MPC accelerating channel and the maximum plasma velocity of (6-8) x 106 cm/s changed negligibly under local xenon injection to compression zone. Nevertheless, the xenon addition causes a growth of maximal plasma pressure up to of 2.3 MPa, an increase of plasma radiation from the compression zone. The plasma density achieved 1018 cm.
Źródło:
Nukleonika; 2012, 57, 2; 197-200
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mechanism of the analysis of entering Internet traffic for the presence of threats
Mekhanizm analiza vkhodjashhego Internet trafika na naliche ugroz
Autorzy:
Petrov, A.
Velchenko, S.
Powiązania:
https://bibliotekanauki.pl/articles/792762.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
external threat
information system
semantic neuron network
virtual network
automated informative system
Internet traffic
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of the Spontaneous Emission of Dye Molecules in Photonic Crystals
Autorzy:
Petrov, E.
Bogomolov, V.
Kalosha, I.
Gaponenko, S.
Powiązania:
https://bibliotekanauki.pl/articles/1992744.pdf
Data publikacji:
1998-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.50.-p
Opis:
Modification of the spontaneous emission of dye molecules embedded in artificial opals exhibiting stop bands in the visible range is observed. Molecules embedded in artificial opals show dips in spontaneous emission spectra and modified fluorescence decay kinetics. Results are interpreted in terms of redistribution of the photon density of states. Effects of the multiple reabsorption and reemission of fluorescence photons and interaction of dye molecules with the silica surface are discussed.
Źródło:
Acta Physica Polonica A; 1998, 94, 5-6; 761-771
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinematics of reference height network on the territory of Rivne NPP
Autorzy:
Tretyak, K.
Petrov, S.
Bokhonko, S.
Babiy, L.
Shpakivskyy, O.
Powiązania:
https://bibliotekanauki.pl/articles/106824.pdf
Data publikacji:
2014
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
deformation
stability of fixed reference points
network kinematics
crustal movements
optimal oscillation period
annual rate of displacement
deformacja
stabilność stałych punktów odniesienia
kinematyka sieciowa
ruchy skorupy ziemskiej
optymalny okres drgań
roczne tempo przemieszczenia
Opis:
Rivne Nuclear Power Plant (NPP) is located in western Ukraine. Construction of the station began in 1976. Totally four power generating units are operating on the station. Complicated geological conditions and display of man-made karst led to the need for monitoring of sediments and deformations on Rivne NPP. Since 1984 on the Rivne NPP there were conducted geodetic observations on the conditions of height reference network consisting of nine deep fixed reference points, which are installed in basaltic rocks. Totally 110 cycles of observations were conducted. The heights of fixed reference points were determined by leveling of I-st class. It is necessary to assess the kinematics of the reference height network and implement zoning of station territory according to a speed of inclination of the earth's surface. An average annual rates of displacement which appear as a linear trend weredetermined on the results of measurements for each fixed reference point by the least squares method. Excluding these values the vertical displacements of fixed reference points were derived and only the periodic component that is changing according to the periodic law remained present there. For each fixed reference point it was determined amplitude and optimum oscillation period and the coefficients of regression equations. Using the annual velocity of displacement of fixed reference points it was done the zoning of the Rivne NPP. There were allocated areas, which were characterized by different rates of inclinations and frequency of oscillations.
Źródło:
Reports on Geodesy and Geoinformatics; 2014, 96; 55-66
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Pontryagin maximum principle for parametrical identification of ship maneuvering mathematical model
Использование принципа максимума понтрягина для параметрической иден тификации математической моделисудна
Wykorzystanie metody maksimum Pontrayagina do parametrycznej identyfikacji matematycznego modelu statku
Autorzy:
Udin, U.
Pashentsev, S.
Petrov, S.
Powiązania:
https://bibliotekanauki.pl/articles/374647.pdf
Data publikacji:
2014
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
maximum principle
vessel’s model
parametrical identification
zasada maksimum
model statku
identyfikacja parametryczna
Opis:
This article proposes usage of Pontryagin maximum principle for parametrical identification of mathematical vessel’s model. Proposed method has a special perspective for identification in real time mode, when the parameters identified can be used for forecasting of coming maneuvers
В статье предложено использование принципа максимума академика Л.С. Понтрягина для параметрической идентификации математической модели судна. Предложенный способ особенно эффективен при идентификации в реальном масштабе времени, когда идентифицированные параметры могут использоваться для прогнозирования ближайших маневров.
Źródło:
Transport Problems; 2014, 9, 2; 11-18
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dense plasma source development and jet injection in Globus-M*
Autorzy:
Voronin, , V. A.
Gusev, V. K.
Petrov, Y. V.
Mukhin, E. E.
Tolstyakov, S. Y.
Kurskiev, G. S.
Kochergin, M. M.
Hellblom, K. G.
Powiązania:
https://bibliotekanauki.pl/articles/147768.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plasma gun
spherical tokamak
fuelling system
Opis:
Progress in the development of a plasma jet source and its utilization for injection of hydrogen plasma and neutral gas jets into the Globus-M spherical tokamak are presented. The latest version of the high kinetic energy gas and plasma jet source with titanium hydride grains is described. Reproducibility of the gas jet generation was increased due to automatic loading of fresh grains into the source before every shot. It allows producing stable gas release for many discharges. Impurity radiation intensity from the plasma jet was decreased by more than 100 times by preliminary processing titanium hydrate grains and developing a new filter. The result of special experiments on two colliding jets is discussed. It was confirmed that the plasma jet recombines into a gas jet after it escapes the source edge and has a kinetic energy higher than the hydrogen ionization potential. Hydrogen plasma jet with low impurity content has a density up to 2 × 1022 m-3, a total number of accelerated particles (1-5) × 1019 and a flow velocity of ~ 200 km/s. It was used as an instrument for density control in Globus-M. Jet injection into deuterium plasma core during current plateau phase led to fast density increase in all spatial points of the plasma column including the plasma central region. Such injection allowed density doubling in the tokamak plasma. The model predictions are consistent with the experimental observations of the density raise recorded by the interferometer and Thomson scattering.
Źródło:
Nukleonika; 2008, 53, 3; 103-109
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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