Search Results - "Kravtsov, Yu A"

Study of the Electromagnetic Environment in Electrified Railroad Sections by Bestem’yanov, P. F., Kravtsov, Yu. A., Shamanov, V. I.

“…Systems of monitoring railroad sections for freeness, as well as systems of transferring information along the rails to train locomotives and between signal…”
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Polarimetry data inversion in conditions of tokamak plasma: Model based tomography concept by Bieg, B., Chrzanowski, J., Kravtsov, Yu. A., Mazon, D.

“…•Model based plasma tomography is presented.•Minimization procedure for the error function is suggested to be performed using the gradient method.•model based…”
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Gaussian beams in inhomogeneous media: A review by Kravtsov, Yu. A., Berczynski, P.

“…The paper outlines the most important results of the paraxial complex geometrical optics (CGO) in respect to Gaussian beams diffraction in the smooth…”
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Complex geometrical optics of Kerr type nonlinear media by Berczynski, P., Kravtsov, Yu.A., Sukhorukov, A.P.

“…The paper generalizes paraxial complex geometrical optics (PCGO) for Gaussian beam (GB) propagation in nonlinear media of Kerr type. Ordinary differential…”
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Gaussian beam diffraction in weakly anisotropic inhomogeneous media by Kravtsov, Yu.A., Berczynski, P., Bieg, B.

“…Combination of quasi-isotropic approximation (QIA) of geometric optics with paraxial complex geometric optics (PCGO) is suggested, which allows describing both…”
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Non-conventional procedure of polarimetry data inversion in conditions of comparable Faraday and Cotton–Mouton effects by Kravtsov, Yu.A., Chrzanowski, J., Mazon, D.

“…A new procedure for inverting plasma polarimetry data is proposed in this paper. The procedure is based on the fit between a two parameter knowledge-based…”
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Diffraction tomography of inhomogeneous medium in the presence of strong phase variations by Kravtsov, Yu. A., Tinin, M. V., Knizhnin, S. I.

“…A model of diffraction tomography on the basis of the double weighted Fourier transform (DWFT) is considered. A method for processing the results of…”
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Method for super Fresnel resolution in electromagnetic diagnostics of inhomogeneous plasma by Kravtsov, Yu.A., Tinin, M.V., Kulizhsky, A.V.

“…The method of electromagnetic diagnostics is suggested, which promises to perform super Fresnel resolution of plasma inhomogeneities, that is resolution,…”
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Complex polarization angle: Relation to traditional polarization parameters and application to microwave plasma polarimetry by Czyz, Z.H., Bieg, B., Kravtsov, Yu.A.

“…Relations between real and imaginary parts of the complex polarization angle and polarization ellipse parameters are established. Differential equations for…”
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Non-Abelian evolution of electromagnetic waves in a weakly anisotropic inhomogeneous medium by Bliokh, K. Yu, Frolov, D. Yu, Kravtsov, Yu. A.

“…A theory of electromagnetic wave propagation in a weakly anisotropic smoothly inhomogeneous medium is developed, based on the quantum-mechanical…”
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Simple analytical expression for work function in the “nearest neighbour” approximation by Chrzanowski, J., Kravtsov, Yu.A.

“…Nonlocal operator of potential is suggested, based on the “nearest neighbour” approximation (NNA) for single electron wave function in metals. It is shown that…”
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Algorithm for polarimetry data inversion, consistent with other measuring techniques in tokamak plasma by Kravtsov, Yu. A., Chrzanowski, J., Mazon, D.

“…New procedure for plasma polarimetry data inversion is suggested, which fits two parameter knowledge-based plasma model to the measured parameters (azimuthal…”
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Multi-parameter gradient procedure for polarimetry data inversion in tokamak plasma by Chrzanowski, J., Kravtsov, Yu. A., Mazon, D.

“…► We use gradient procedure to fit plasma parameters to polarimetric data. ► Calculations are performed in developed by authors angular variables technique. ►…”
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Experimental morphological study of rapidly resolved implants used for the treatment of ventral hernias by Grigoryuk, A A, Kravtsov, Yu A

“…Experimental defect in the abdominal wall, created in 36 outbred albino rats, was closed with an implant (biocompatible connective-tissue element). The…”
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Modulation and suppression of weak Cotton-Mouton effect by Faraday rotation by Kravtsov, Yu. A., Chrzanowski, J.

“…Polarization of electromagnetic waves in magnetized plasma is studied in conditions, when Cotton-Mouton effect is weak enough as compared with Faraday one…”
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Fluctuation growth and saturation in nonlinear oscillators on the threshold of bifurcation of spontaneous symmetry breaking by Surovyatkina, E D, Kravtsov, Yu A, Kurths, J

“…We study prebifurcation fluctuation amplification in nonlinear oscillators subject to bifurcations of spontaneous symmetry breaking which are manifest in the…”
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Numerical implementation of complex geometrical optics by Egorchenkov, R. A., Kravtsov, Yu. A.

“…We propose a numerical scheme for calculation of the wave field, based on the geometrical-optics method generalized for complex values. The main advantage of…”
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Nonresonant mechanism of scattering of electromagnetic waves by sea surface : Scattering by steep sharpened waves by KRAVTSOV, Yu. A, MITYAGINA, M. I, CHURYUMOV, A. N

“…We develop an asymptotic theory of nonresonant backscattering of electromagnetic waves in the X-band by the ocean surface. Small-height (5÷20 cm) breaking…”
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Modified geometric optics: Accounting for exponentially small scattered fields by Egorchenkov, R. A., Kravtsov, Yu. A.

“…We propose a modified geometrical-optics approximation (MGO). It is based on the solution of the Helmholtz equation in the form of a series in which the main…”
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Description of the 2D Gaussian beam diffraction in a free space in frame of eikonal-based complex geometric optics by Kravtsov, Yu.A., Berczynski, P.

“…Analytical expression for the 2D Gaussian beam diffraction in a free space is derived from the eikonal-based form of complex geometrical optics (CGO). This…”
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