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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Muzalevskiy K. V., Fomin S. V., Mikhaylov M. I.
Заглавие : UWB reflectometric method for the measuring of vegetation biometric parameters and soil moisture
Коллективы : IEEE Ural-Siberian Conference on Biomedical Engineering, Radioelectronics and Information Technology
Место публикации : IEEE Ural-Siberian Conference on Biomedical Engineering, Radioelectronics and Information Technology (USBEREIT). - 2023. - P.166-169. - , DOI 10.1109/USBEREIT58508.2023.10158880
Примечания : Cited References: 17. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project № 22-17-20042
Аннотация: In this article, a method for the simultaneous measurement of total biomass, vegetation water content, and soil moisture is developed based on ultra-wideband (UWB) nadir observation of the reflection coefficient in the frequency range from 450 MHz to 6 GHz. The proposed method is based on a simple model of plane wave reflection from a vegetation layer with flat boundaries lying on a smooth soil surface. The model does not take into account the phenomena of wave scattering on the vegetation elements and the soil surface roughness. The dielectric constant of the vegetation canopy and soil were calculated based on Ulaby and Mironov dielectric models, respectively. The proposed method was tested using data from PORTOS-93 (INRA) experiments on measuring: total biomass (up to 3.3 kg/m2), water content (43%-89%), height (up to 1m) and volumetric content (up to 0.6-0.8%) of wheat plants, moisture (from 5% to 36%), density and clay fraction content (27%) of the soil. As a result, it was shown, the coefficient of determination (R2) and root-mean-square error (RMSE) appeared to be equal to R2=0.999 and RMSE=2.2% when comparing the original and retrieved values of volumetric soil moisture. The retrieved values of total biomass (vegetation water content) with the coefficient of determination R2=0.999 (0.998) and RMSE=16g/m2 (0.7%) coincide with the original set values. Therewith, the bands from 4 GHz to 6 GHz and from 450 MHz to 1 GHz were used to retrieve the canopy biometric parameters and soil moisture, respectively.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Kleshnina S. A., Belyaev B. A., Boev N. M., Izotov A. V., Burmitskikh A. V., Gorchakovsky A.
Заглавие : Unit for measuring the magnetic characteristics of thin ferromagnetic films
Коллективы : Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology, Institute of Electrical and Electronics Engineers
Место публикации : Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology, USBEREIT 2020: proceedings. - 2020. - Ст.9117609. - P.326-329. - , DOI 10.1109/USBEREIT48449.2020.9117609
Примечания : Cited References: 7. - This work was supported by the Ministry of Education and Science of 075 11 2019-054
Аннотация: Studying the properties of ferromagnetic films helps in solving the fundamental problems of the physics of magnetic phenomena and in developing the theory of ferromagnetism. Modern software and hardware, along with reliable diagnostic methods are used to research and design thin-film devices. In this regard, the development of devices and methods for measuring the magnetic characteristics of thin ferromagnetic films is an essential task. The aim of the work is to develop an unit for local measurements of the magnetic characteristics of thin ferromagnetic films, which has the ability to change the degree of locality of measurements over a wide range and has high sensitivity at the same time. The article reviews a new unit for measuring the magnetic characteristics of thin ferromagnetic films. The unit allows measuring the value and direction of the anisotropy field on a local area of the film. A block diagram and description of a new unit, as well as methods of measurements are shown in the article. The experimentally obtained distribution of the anisotropy field over the area of the studied sample of Ni 80 Fe 20 film is shown in this work. The experimental results confirm the compliance of the new unit with the declared characteristics. The unit can be used for non-destructive quality control and for measuring uniformity of thin ferromagnetic films magnetic characteristics.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Barannik A. V., Zyryanov V. Ya., Shkuryaev P. G., Shabanov V. F.
Заглавие : Thermooptical information recording in the bistable films of polymer dispersed cholesteric liquid crystals
Коллективы : "Информационная оптика. Научные основы и технологии", международный симпозиум, "Optical information science and technology", International symposium
Место публикации : Информационная оптика. Научные основы и технологии: международный симпозиум OIST'97 : программа и аннот. докл. - Москва, 1997. - С. 42
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zyryanov V. Ya., Zhuikov V. A., Smorgon S. L., Shabanov V. F., Adomenas P. V.
Заглавие : Thermooptical information record in polymer-capsulated cholesteric liquid crystals
Место публикации : Zhurnal Tek. Fiz. - 1996. - Vol. 66, Is. 8. - P.99-106. - ISSN 0044-4642
Примечания : Cited References: 9
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Barannik A. V., Zyryanov V. Ya., Shabanov V. F.
Заглавие : Thermooptical information record in bistable PDChLC films by focused light beam
Коллективы : International Liquid Crystal Conference
Место публикации : 17th International Liquid Crystal Conference (ILCC 1998): program and abstract book. - 1998. - P.252
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : BURKOVA L. V., ERUKHIMOV M. S., SEREDKIN V. A., FROLOV G. I., YAKOVCHUK V. Y.
Заглавие : THERMOMAGNETIC WRITING OF ANALOGOUS INFORMATION ON RFE(R-TB, DY) FILMS
Место публикации : Zhurnal Tek. Fiz.: MEZHDUNARODNAYA KNIGA, 1985. - Vol. 55, Is. 4. - P707-713. - ISSN 0044-4642
Примечания : Cited References: 17
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Artyushenko P. V., Tomilin F. N., Kuzubov A. A., Ovchinnikov S. G., Tsikalova P. E., Ovchinnikova T. M., Soukhovolsky V. G.
Заглавие : The stability of the pheromones of xylophagous insects to environmental factors: An evaluation by quantum chemical analysis
Место публикации : Biophysics: MAIK Nauka-Interperiodica / Springer, 2017. - Vol. 62, Is. 4. - P.532-538. - ISSN 00063509 (ISSN), DOI 10.1134/S0006350917040029
Примечания : Cited References: 50
Ключевые слова (''Своб.индексиров.''): insects--xylophages--pheromones--molecules--chemical properties--environment--impact--information--research--effectiveness
Аннотация: The ground and excited states of the pheromone molecules produced by xylophagous insects (the bark beetle Ips typographus L., the black fir sawyer beetle Monochamus urussovi Fisch., and the black pine sawyer M. galloprovincialis Oliv.) were modeled using a quantum chemical method utilizing DFT (density functional theory) with the B3LYP functional. The absorption wavelengths (energies) and dipole moments were calculated; the transitions of electrons from occupied to empty molecular orbitals were considered. The computed data were used to assess the stability of pheromone molecules exposed to environmental factors, such as solar radiation and humidity.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Smolyarov K. T., Volkov N. V., Matsulev A. N., Kondrasenko A. A.
Заглавие : The comparative analysis of the solid-state 31P NMR spectra of Re-Pt vinylidene complexes
Коллективы : International Scientific Conference "Conference on Applied Physics, Information Technologies and Engineering"
Место публикации : J. Phys. Conf. Ser. - 2019. - Vol. 1399. - Ст.022028. - ISSN 1742-6588, DOI 10.1088/1742-6596/1399/2/022028. - ISSN 1742-6596 (eISSN)
Примечания : Cited References: 11
Предметные рубрики: Applied Physics
Аннотация: The two vinylidene complexes Cp(CO)2 RePt(μ-C=CHPh)(PPh3 )(CO) and Cp(CO)2 RePt(μ-C=CHPh)(PPh3 )2 and their precursors PPh3 and P(PPh3 )4 were studied by solid-state nuclear magnetic resonance. We analysed 31P cross-polarization spectra acquired in static conditions and with magic angle spinning. The chemical shift tensors of each sample were determined by fitting their spectra using SIMPSON simulations.
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10.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Muzalevskiy K. V., Mikhaylov M. I., Ruzicka Z.
Заглавие : Synthesizing of ultra-wide band impulse by means of a log-periodic dipole antenna. Case study for a radar stand experiment
Коллективы : IEEE International Multi-Conference on Engineering, Computer and Information Sciences 2022
Место публикации : 2022 IEEE International Multi-Conference on Engineering, Computer and Information Sciences, SIBIRCON 2022: IEEE, 2022. - P.1140-1143. - , DOI 10.1109/SIBIRCON56155.2022.10017008
Примечания : Cited References: 20. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project № 22-17-20042
Аннотация: In this work, the approach of ultra-wide band pulses synthesizing is proposed using a broadband low-cost log-periodic dipole antenna and a vector network analyzer. Synthesis of UWB pulse (duration of 2.2ns) became possible due to minimization of antenna dispersion by compensation of amplitude and phase-frequency distortions introduced by the antenna into radiated and received pulse. The method had been developed for a down-looking antenna in a monostatic radar configuration. The antenna return loss was calculated using the model of two-port linear network with S-parameters. To calibrate the model, an original amplitude-phase method was proposed that requires measuring the antenna's return loss when the antenna is located only at several heights above the reflecting surface (metal sheet). In this case, the antenna return loss in an empty room does not need to be measured. The proposed method for synthesizing UWB pulses does not require changes in the design of the antenna and can be implemented as an additional software calibration of the antenna-feeder path. The proposed method of UWB pulses synthesizing can be implemented using miniature, low-cost vector network analyzers for environment remote sensing from unmanned aerial vehicle using the UWB impulses.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Gopar V. A., Mello P. A., Rotter I.
Заглавие : Statistical study of the conductance and shot noise in open quantum-chaotic cavities: Contribution from whispering gallery modes
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 2006. - Vol. 73, Is. 15. - Ст.155302. - ISSN 1098-0121, DOI 10.1103/PhysRevB.73.155302
Примечания : Cited References: 20
Предметные рубрики: HELMHOLTZ EQUATION
INFORMATION-THEORY
NUCLEAR-REACTIONS
TRANSPORT
Аннотация: In the past, a maximum-entropy model was introduced and applied to the study of statistical scattering by chaotic cavities, when short paths may play an important role in the scattering process. In particular, the validity of the model was investigated in relation with the statistical properties of the conductance in open chaotic cavities. In this paper we investigate further the validity of the maximum-entropy model, by comparing the theoretical predictions with the results of computer simulations, in which the Schrodinger equation is solved numerically inside the cavity for one and two open channels in the leads; we analyze, in addition to the conductance, the zero-frequency limit of the shot-noise power spectrum. We also obtain theoretical results for the ensemble average of this last quantity, for the orthogonal and unitary cases of the circular ensemble and an arbitrary number of channels. Generally speaking, the agreement between theory and numerics is good. In some of the cavities that we study, short paths consist of whispering gallery modes, which were excluded in previous studies. These cavities turn out to be all the more interesting, as it is in relation with them that we found certain systematic discrepancies in the comparison with theory. We give evidence that it is the lack of stationarity inside the energy interval that is analyzed, and hence the lack of ergodicity-a property assumed in the maximum-entropy model-that gives rise to the discrepancies. Indeed, the agreement between theory and numerical simulations is improved when the energy interval is reduced to a point and the statistics is then collected over an ensemble obtained by varying the position of an obstacle inside the cavity. It thus appears that the maximum-entropy model is valid beyond the domain where it was originally derived. An understanding of this situation is still lacking at the present moment.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tomilin F.N., Ovchinnikov S.G., Osina O.V., Kuzubov A.A., Volkova P.E., Ovchinnikova T.M., Soukhovolsky V.G.
Заглавие : Stability of forest lepidopteran pheromones against environmental factors
Место публикации : Biophysics. - 2011. - Vol. 56, Is. 4. - С. 695-701. - ISSN 00063509 (ISSN) , DOI 10.1134/S0006350911040282
Ключевые слова (''Своб.индексиров.''): information--insects--lepidoptera--pheromones--reproduction--search--dendrolimus superans--hexapoda--lepidoptera--lymantria
Аннотация: A quantum-chemical study has been made of the interactions of pheromones of some lepidopteran forest pests (Siberian moth Dendrolimus superans sibiricus Tschetv and gypsy moth Limantria dispar L.) with components of the ambient air, as well as the effect of electromagnetic radiation on the pheromones. It is found that the reactions of pheromones with substances contained in the forest air are irreversible and proceed with liberation of heat. Electromagnetic radiation quite strongly affects the structure of pheromones, whereby the pheromone molecule is activated and can readily enter into reactions. © 2011 Pleiades Publishing, Ltd.
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Loiko V. A., Zyryanov V. Ya., Konkolovich A. V., Miskevich A. A., Prishchepa O. O., Shabanov A. V., Krakhalev M. N.
Заглавие : Spectral dependences of transmittance and polarizing ability of stretched PDLC films with homogeneous and inhomogeneous interface anchoring
Коллективы : EuroDisplay international conference, Society for Information Displays, Белорусский государственный университет информатики и радиоэлектроники
Место публикации : EuroDisplay 2019: book of abstracts of International conference. - 2019. - Ст.O-9. - P.25
Примечания : Cited References: 2
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zobov V. E., Lundin A. A.
Заглавие : Reversible and Irreversible propagation of quantum information and its manifestation in multiple-quantum NMR spectra in solids
Коллективы : Ministry of Science and Higher Education of the Russian Federation [0082-2019-0001, AAAA-A19-119012890064-7]
Место публикации : J. Exp. Theor. Phys. - 2020. - Vol. 131, Is. 2. - P.273-279. - ISSN 1063-7761, DOI 10.1134/S1063776120060096. - ISSN 1090-6509(eISSN)
Примечания : Cited References: 33. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the State Task 0082-2019-0001 (State Registration Number AAAA-A19-119012890064-7)
Предметные рубрики: DYNAMICS
LOCALIZATION
SIMULATIONS
COHERENCES
Аннотация: On the basis of the earlier developed statistical theory of the growth of the effective size of correlated clusters (the number of correlated spins), an expression for the shape of the multiple-quantum (MQ) NMR spectrum is obtained that takes into account the loss of coherence in a spin system due, for example, to the controlled intervention of the experimenter. It is shown that the scrambling and decoherence processes in the MQ spectrum of the multiparticle system of a solid are not separated, unlike the corresponding spectra of some large isolated molecules [27] in a solution. The relations obtained allow one to extract the necessary information about the above processes (scrambling and decoherence) from the dependence of the MQ spectra on experimental parameters.
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zobov V. E.
Заглавие : Quantum discord in the central spin model
Коллективы : International Conference on Micro- and Nano-Electronics (Oct. 6-10, 2014; Zvenigorod, Russia)
Место публикации : Proceedings of SPIE: SPIE-Int. Soc. Optical Engineering, 2014. - Vol. 9440. - P.94401E-94401E-8. - ISBN 0277, DOI 10.1117/12.2180727. - ISBN 9781628415551
Примечания : Cited References:30
Предметные рубрики: DECOHERENCE
Ключевые слова (''Своб.индексиров.''): electron-nuclear spin echo--dynamical correlation--mutual information--quantum discord
Аннотация: The quantum properties of dynamic correlations in a system of an electron spin surrounded by nuclear spins under the conditions of free induction decay (FID) and spin echo have been studied. Analytical results for the time evolution of mutual information, classical part of correlations, and quantum part characterized by quantum discord have been obtained within the central spin model in the high-temperature approximation. The same formulas describe the quantum discord in both the FID and the spin echo although the forms of the dependences are different because of difference in the parameters entering into the formulas. Discord of the spin echo compared with the FID has a strong dependence on time at short times, and it tends to zero with decreasing of the magnetic field, whereas in the case of the FID it reaches a plateau.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zobov V. E.
Заглавие : Quantum discord in the central spin model
Коллективы : International Conference on Micro- and Nano-Electronics , International Conference on Micro- and Nano-Electronics (Oct. 6-10, 2014; Zvenigorod, Russia)
Место публикации : International Conference "Micro- and Nanoelectronics – 2014". - 2014. - Ст.q2-06
Примечания : Cited References:30
Ключевые слова (''Своб.индексиров.''): electron-nuclear spin echo--dynamical correlation--mutual information--quantum discord
Аннотация: The quantum properties of dynamic correlations in a system of an electron spin surrounded by nuclear spins under the conditions of free induction decay (FID) and spin echo have been studied. Analytical results for the time evolution of mutual information, classical part of correlations, and quantum part characterized by quantum discord have been obtained within the central spin model in the high-temperature approximation. The same formulas describe the quantum discord in both the FID and the spin echo although the forms of the dependences are different because of difference in the parameters entering into the formulas. Discord of the spin echo compared with the FID has a strong dependence on time at short times, and it tends to zero with decreasing of the magnetic field, whereas in the case of the FID it reaches a plateau.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zobov V. E.
Заглавие : Quantum and classical correlations in high-temperature dynamics of two coupled large spins
Место публикации : THEOR. MATH. PHYS. - 2013. - Vol. 177, Is. 1. - P.1377-1389. - ISSN 0040-5779, DOI 10.1007/s11232-013-0110-5
Ключевые слова (''Своб.индексиров.''): generalized measurement--high-temperature approximation--mutual information--quantum correlation--spin coherent state--spin dynamics
Аннотация: We study the dynamical correlations between two coupled spins depending on time and the value of the spin quantum numbers. In the high-temperature approximation, we obtain analytic expressions for the mutual information and the quantum and classical parts of correlations. We consider both orthogonal and nonorthogonal measurements in the basis of spin coherent states. We show that at small times, the quantum part of correlations becomes much less than the classical part as the spin quantum numbers increase, while the situation is quite different at times equal to half the quantum period.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zobov V. E.
Заглавие : Quantum and classical correlations in high temperature dynamics of two coupled large spins : conference paper
Коллективы : International Conference on Micro- and Nano-Electronics (Oct. 1-5, 2012; Zvenigorod, Russia)
Место публикации : Proc. SPIE. - 2012. - Vol.8700. - Ст.87001D. - P. - ISSN 0277-786X, DOI 10.1117/12.2016982. - ISSN 978-081949487-0
Примечания : Cited References: 17
Ключевые слова (''Своб.индексиров.''): dynamical correlations--measurement--mutual information--nuclear magnetic resonance--spin coherent states
Аннотация: We study dynamical correlations of two coupled large spins depending on the time and on the spin quantum numbers. In the high-temperature approximation, we obtain analytical expressions for the mutual informations, quantum and classical parts of correlations. The latter was obtained performing the non-orthogonal projective (POVM) measurements onto the spin coherent states of two spins or one spin, as well as by means of the orthogonal projective measurement of von Neumann. Contribution from quantum correlations is much less than that from classical ones and decreasing with the increase in spin quantum numbers at short times. However, it is not so in a time equal to half of the quantum period. © 2012 SPIE.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zyryanov V. Ya., Smorgon S. L., Shabanov V. F.
Заглавие : Polymer dispersed ferroelectric liquid crystals as display materials
Коллективы : SID International Symposium, Society for Information Display
Место публикации : SID International Symposium: digest of technical papers. - 1992. - Vol. 23. - P.776-777
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20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zyryanov V. Ya., Shabanov V. F., Smorgon S. L., Pozhidaev E. P.
Заглавие : Polymer dispersed ferroelectric liqud-crystal light valves
Коллективы : SID International Symposium, Society for Information Display
Место публикации : SID International Symposium: digest of technical papers. - 1994. - Vol. 25. - P.605-607
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