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


Tytuł:
The market model of CDO spreads
Autorzy:
Gątarek, D.
Petrov, V.
Stavrou, A.
Powiązania:
https://bibliotekanauki.pl/articles/206047.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
CDO pricing
Marshall-Olkin copula
bottom-up approach
Opis:
In this paper we present a new arbitrage-free bottomup model of correlated defaults, based on a special approach to systematic and idiosyncratic risks for individual obligors. The model admits several attractive features, like consistency with currency and interest rate models, as well as numerical tractability and flexibility, making it capable to fit the market for practically all self consistent CDO tranche prices. Its background is rather remote from other approaches, like copulas and point processes, so our presentation is detailed.
Źródło:
Control and Cybernetics; 2015, 44, 1; 149-162
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photosynthetic performance of young maize (Zea mays L.) plants exposed to chilling stress can be improved by the application of protein hydrolysates
Wpływ hydrolizatów białkowych na wydajność fotosyntetyczną młodych roślin kukurydzy (Zea mays L.) poddanych stresowi chłodu
Autorzy:
Cholakova-Bimbalova, R.
Petrov, V.
Vassilev, A.
Powiązania:
https://bibliotekanauki.pl/articles/27199.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
Biostimulants offer a novel approach for the regulation of crucial physiological processes in plants. Recently, it has been observed that the application of biostimulants on both seeds and plants may ameliorate to some extent the negative effects of abiotic stresses such as drought, heat, salinity, and others. In the climate conditions of Bulgaria, the early developmental stages of warm climate crops, like maize, often occur under suboptimal temperatures. Although the mitigation of abiotic stress is perhaps the most frequently cited benefit of biostimulant formulations, little is known about their influence on chilling-stressed plants. The aim of our study was to evaluate the effects of a biostimulant from the group of protein hydrolysates on both the growth and the photosynthetic performance of chilling-exposed young maize plants grown in controlled environment. Here, we report that application of a protein hydrolysate increased the performance of chilled maize plants, as demonstrated by leaf gas exchange, photosynthetic pigment content, and chlorophyll fluorescence, but did not affect their growth. Nevertheless, based on the better preserved photosynthetic performance of the biostimulant-treated maize plants exposed to chilling, we assume that under subsequent favorable conditions their growth would recover more quickly as compared to the untreated ones.
Zastosowanie biostymulantów jest nowatorskim sposobem regulacji procesów fizjologicznych w roślinach. W ostatnich latach dowiedziono również, że ich aplikacja, zarówno na nasiona jak i części wegetatywne może w pewnym zakresie niwelować negatywne skutki stresów abiotycznych, między innymi suszy, zasolenia czy zbyt wysokiej temperatury. W warunkach klimatycznych Bułgarii wczesne fazy rozwoju roślin uprawnych pochodzących z cieplejszych stref klimatycznych, na przykład kukurydzy, odbywają się w okresach panowania temperatur suboptymalnych. Mimo, że łagodzenie negatywnych skutków stresu jest jednym z najczęściej podawanych korzystnych efektów działania biostymulantów, wiedza na temat ich wpływu na rośliny poddane stresowi chłodu jest wciąż niewystarczająca. Celem badań była ocena działania biostymulantów z grupy hydroli- zatów białkowych na wzrost i przebieg procesu fotosyntezy kukurydzy uprawianej w warunkach obniżonej temperatury. Aplikacja hydrolizatów białkowych miała pozytywny wpływ na wymianę gazową, zawartość barwników fotosyntetycznych i sprawność aparatu fotosyntetycznego mierzoną parametrami fluorescencji chlorofilu a, ale nie wpłynęła na wzrost roślin. Na podstawie uzyska -nych wyników można przypuszczać, że ze względu na sprawniejszy przebieg procesu fotosyntezy, rośliny kukurydzy poddane działaniu zbyt niskiej temperatury we wczesnych etapach rozwoju i potraktowane biostymulantami będą rosły lepiej po ustąpieniu suboptymalnych temperatur w porównaniu z roślinami nie poddanymi działaniu biostymulantów.
Źródło:
Acta Agrobotanica; 2019, 72, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mały Katyń : dlaczego rosyjska Naczelna Prokuratura Wojskowa nie była w stanie wyjaśnić sprawy masowego mordu na polskich obywatelach w 1945 roku?
Autorzy:
Petrov, Nikita V. (1957- ).
Powiązania:
Forum 2011, nr 27, s. 50-53
Data publikacji:
2011
Tematy:
Ludobójstwo
Podziemie polityczne i zbrojne (1944-1956)
Służba bezpieczeństwa
Opis:
Tł. art. zamieszcz. w "Novaja Gazieta". - 2011, 7 VI.
Dot. ofiar obławy augustowskiej w 1945 r.
Fot.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Calorimetric studies of the energy deposition on a material surface by plasma jets generated with QSPA and MPC devices
Autorzy:
Chuvilo, A. A.
Garkusha, I. E.
Makhlaj, V. A.
Petrov, Y. V.
Powiązania:
https://bibliotekanauki.pl/articles/147706.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
quasi steady-state plasma accelerator (QSPA)
energy density
heat load
plasma streams
plasma-surface interaction
Opis:
Studies of the energy deposition by plasma jets incident on a material surface are of topical interest for both the fusion and plasma technology applications. In this paper the results are reported of a comparative study of plasma energy deposition on different material surfaces exposed to plasma jets of various duration and energy density, generated using the QSPA Kh-50 and the MPC devices. The spatial distribution of plasma energy density and the heat load on the surface were measured with a movable calorimeter. The measurements demonstrate that in the case of an exposure to QSPA plasma jets the absorbed heat load is approximately equal to 55-60% of the energy in the incident plasma jet. In the case of plasma jets generated using the MPC device the heat load on the target surface and was practically the same as for the QSPA jets, and additional shielding effects were found to be negligible due to the short duration of plasma jets.
Źródło:
Nukleonika; 2012, 57, 1; 49-53
0029-5922
1508-5791
Pojawia się w:
Nukleonika
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:
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
Tytuł:
Modelling of discrete recognition and information vulnerability search procedures
Modelirovaniye diskretnykh protsedur raspoznavaniya ugroz i poiska uyazvimostey informatsii
Autorzy:
Lahno, V.
Petrov, A.
Powiązania:
https://bibliotekanauki.pl/articles/792978.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11A
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Models, Methods and Information Technologies of Protection of Corporate Systems of Transport Based on Intellectual Identification of Threats
Autorzy:
Petrov, A.
Lakhno, V.
Korchenko, A.
Powiązania:
https://bibliotekanauki.pl/articles/375969.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
systems of transportation and communication
information security
cyber security
threat detection
mathematical models
fuzzy logic
Opis:
In the article, results of the research on the development of methods and models of intellectual recognition of threats to information systems of transport. The article contains results of the research that allows us to raise the level of protection of the automated and intellectual information systems of the transportation enterprises (AISTE) in the conditions of the intensification of transportation. The article contains mathematical models and results of estimation information systems having Internet connection through various communication channels. The article also considers the issues of research and protection of the AISTE under the condition of several conflict-data-request threads.
Źródło:
Decision Making in Manufacturing and Services; 2015, 9, 2; 117-136
1896-8325
2300-7087
Pojawia się w:
Decision Making in Manufacturing and Services
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:
Issledovanie osobennostej primenenija nanotehnologii dlja ochistki neftesoderzhashhih vod
Research of application of nanotechnology to clean oily water
Autorzy:
Kulalaeva, N.
Mihajlyuk, V.
Petrov, I.
Powiązania:
https://bibliotekanauki.pl/articles/77030.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Opis:
The article is devoted to research features of using of nanotechnology of cleaning up oily water by the way of forming organized environment in the system of “oily water - coalescing sorbent, modified polymeric cationic surfactant” at the surface of the sorbent of coalescing type.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2012, 14, 2
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka 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:
Investigation of Waste Properties of Subway Construction as a Potential Component of Soil Layer
Autorzy:
Ivanov, A. V.
Smirnov, Y. D.
Petrov, G. I.
Powiązania:
https://bibliotekanauki.pl/articles/124091.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
subway
waste
soil
landfill
mine site
hazard class
total carbon
moisture
biotesting
Chlorella algae
Opis:
The construction of subway stations is inevitably accompanied by the formation of a large amount of waste that is extracted from the underground workings by rock. When the waste is transported, the air is polluted with the exhaust gases of the dump trucks, some of the waste can stay on the road surface, the use of dump trucks increases the load on the roadway, the disposal of waste at landfills harms the environment, and enterprises pay fees for the transportation as well as placement of the waste. The article deals with the waste from the construction of new stations in the Saint-Petersburg subway. In order to determine the possibility of using waste in the municipal economy, a comprehensive analysis of this waste was carried out, including determination of moisture content, acidity, total carbon content, as well as chemical and granulometric composition. On the basis of the study results, it was established that the waste in question belongs to the hazard class 5, which enables to use it as a component of the soil mixture. Afterwards, the hazard class 5 was confirmed by the method of bioassay based on the determination of water toxicity by changing the optical density of the Chlorella algae culture.
Źródło:
Journal of Ecological Engineering; 2018, 19, 5; 59-69
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validity and timing in decision support systems
Autorzy:
Petrov, O.
Horoshko, V.
Aleksander, M.
Basiura, B.
Hokhlacheva, Y.
Powiązania:
https://bibliotekanauki.pl/articles/314686.pdf
Data publikacji:
2018
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
decision support systems
validity
timing
process
Opis:
Based on the principle of synthesizing the matrix of transitional probabilities, processes of decision-making support by means of the truncated procedures of type (k/n)n (k≤n) are considered. Obtained expressions for calculating the time-efficiency of the processes of decision support using procedures type (k/4)4 are shown. There are given calculated by the expressions obtained data time efficiency, which will enable a quantitative comparison between different procedures and select the best of them on the basis of specific practical tasks.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2018, 19, 12; 1116-1122
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High kinetic energy dense plasma jet
Autorzy:
Voronin, A.
Gusev, V.
Petrov, Y.
Sakharov, N.
Abramova, K.
Hellblom, K.
Powiązania:
https://bibliotekanauki.pl/articles/147488.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plasma gun
spherical tokamak
fuelling system
Opis:
Researches on the plasma jet source and injection of hydrogen plasma and neutral gas jets into the Globus-M spherical tokamak are presented. A novel source of dense plasma with high directed velocity is designed, constructed and investigated. This is a double stage system consisting of an intense source utilizing titanium-hydride grains for neutral gas production and a conventional pulsed coaxial accelerator. Optimization of the accelerator parameters, so as to achieve a maximum possible flow velocity with a limited discharge current and a reasonable length of the coaxial electrodes is performed. The calculations are compared with the experiment. A test bed is used for investigation of the intense plasma jet generated by a plasma gun. Plasma jet parameters, among them pressure distribution across the jet, flow velocity, plasma density etc., were measured. Plasma jets with densities of up to 1022 m 3, total numbers of accelerated particles (1 5) . 1019, and flow velocities of 50 100 km/s were successfully injected into the plasma column of the Globus-M tokamak. Interferometric and Thomson scattering measurements confirmed a deep jet penetration and a fast density rise (<0.5 ms) at all spatial points up to the radius r H 0.3a. The injection did not result in plasma degradation.
Źródło:
Nukleonika; 2006, 51, 1; 85-92
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
(Nano) technology for managing plant organisms with the help of targeted impact using the signals of the physical nature
Autorzy:
Karpachev, V.V.
Voropaeva, N.L.
Belonozhkina, T.G.
Naumov, E.V.
Vasilev, M.M.
Petrov, O.F.
Figovsky, O.
Powiązania:
https://bibliotekanauki.pl/articles/10815.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
One of the major problems of agricultural production has been to improve the sowing qualities of seeds to increase yields of various crops. In this regard, of particular interest is the control technology of vegetable organisms by "address the impact of" signals of the physical nature. Plasma treatment of seeds influences the growth and development of the amaranth. The effectiveness of treatment depends on the exposure time of the exposure. The largest positive treatment effect of the plasma on the growth, development and yield of amaranth has been observed when the exposure 60 seconds, leading to increased yields.
Źródło:
International Letters of Natural Sciences; 2015, 05
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł

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