The Experts below are selected from a list of 114663 Experts worldwide ranked by ideXlab platform
Songlin Zhuang - One of the best experts on this subject based on the ideXlab platform.
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vector plane Wave Spectrum of an arbitrary polarized electromagnetic Wave
Optics Express, 2006Co-Authors: Hanming Guo, Jiabi Chen, Songlin ZhuangAbstract:By using the method of modal expansions of the independent transverse fields, a formula of vector plane Wave Spectrum (VPWS) of an arbitrary polarized electromagnetic Wave in a homogenous medium is derived. In this formula VPWS is composed of TM- and TE-mode plane Wave Spectrum, where the amplitude and unit polarized direction of every plane Wave are separable, which has more obviously physical meaning and is more convenient to apply in some cases compared to previous formula of VPWS. As an example, the formula of VPWS is applied to the well-known radially and azimuthally polarized beam. In addition, vector Fourier-Bessel transform pairs of an arbitrary polarized electromagnetic Wave with circular symmetry are also derived.
V. G. Polnikov - One of the best experts on this subject based on the ideXlab platform.
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Numerical studying mechanics of a stationary range formation in the wind-Wave Spectrum
arXiv: Atmospheric and Oceanic Physics, 2018Co-Authors: V. G. Polnikov, Fangli QiaoAbstract:The process of a stationary range formation in the wind-Wave Spectrum is investigated numerically. The evolution equation for the two-dimensional wind-Wave Spectrum is numerically solved by using an exact calculation of the Hasselmann kinetic integral with exploring several parametrizations for the Wave-pumping and Wave-dissipation mechanisms. The following results are established. First, there is no any inertial interval in the spectral frequency band of real wind Waves. Therefore, there is no reason for the Kolmogorov-type spectra formation in this case. Second, the ratio between the input and dissipation mechanisms is responsible for a stationary range formation in the wind-Wave Spectrum. Third, this ratio enables us to establish all known forms for a stationary range of the Spectrum, if proper mathematical representations for the input and dissipation mechanisms are chosen.
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Mechanisms of the equilibrium-range formation in the wind-Wave Spectrum. Numerical simulation
arXiv: Atmospheric and Oceanic Physics, 2017Co-Authors: V. G. PolnikovAbstract:The issue of the equilibrium-range formation in the wind-Wave Spectrum is studied by a direct numerical simulation. The evolution equation of wind-Wave Spectrum is numerically solved with using an exact calculation of the Hasselmann kinetic integral and involving various modifications of known parametrizations for the Wave-pumping mechanism due to wind and the Wave-dissipation mechanism due viscosity of the upper layer. It is shown that the balance of the last two mechanisms is responsible for a formation of stationary part of the wind-Wave Spectrum. This balance allows establishing any prescribed form of the equilibrium part of the Spectrum, if the proper representations of input and dissipation mechanisms are chosen.
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Nonlinear Energy Transfer over the Wave Spectrum in Water Covered by Solid Ice
Fluid Dynamics, 2003Co-Authors: I. V. Lavrenov, V. G. PolnikovAbstract:On the basis of the hydrodynamic equations for nonlinear elastic-gravity Waves beneath a solid ice cover and their Hamiltonian representation, a three-Wave kinetic equation for the time evolution of the Wave Spectrum is formulated. The properties of the kernel of the kinetic integral describing the nonlinear interactions between Wave triplets are investigated. An algorithm for numerically calculating the kinetic integral is developed. The rate of nonlinear energy transfer over the Wave Spectrum is estimated quantitatively and its most important characteristics are found.
Yang Jing - One of the best experts on this subject based on the ideXlab platform.
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Satellite-based SAR image Spectrum simulation with Wen's Wave Spectrum
Donghai Marine Science, 1999Co-Authors: Yang JingAbstract:Simulation of satellite\|based SAR image Spectrum has been carried out using the closed nonlinear integral transformation of K.Hasselmann and S.Hasselmann. The input ocean Wave Spectrum is Wen\'s theoretic ocean Wave Spectrum which best characterizes the sea states of the China Seas. The results show that velocity bunching modulation is the most important SAR ocean Wave imaging mechanism. 180° ambiguity of Wave direction and high azimuthal Wave number cutoff exist in all the SAR image spectra. The general splitting of the single Wave spectral peak into two peaks for range travelling Wave appears in the SAR image spectra. In addition, the relative importance of modulation transfer functions (MTFs) is discussed.
Hanming Guo - One of the best experts on this subject based on the ideXlab platform.
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vector plane Wave Spectrum of an arbitrary polarized electromagnetic Wave
Optics Express, 2006Co-Authors: Hanming Guo, Jiabi Chen, Songlin ZhuangAbstract:By using the method of modal expansions of the independent transverse fields, a formula of vector plane Wave Spectrum (VPWS) of an arbitrary polarized electromagnetic Wave in a homogenous medium is derived. In this formula VPWS is composed of TM- and TE-mode plane Wave Spectrum, where the amplitude and unit polarized direction of every plane Wave are separable, which has more obviously physical meaning and is more convenient to apply in some cases compared to previous formula of VPWS. As an example, the formula of VPWS is applied to the well-known radially and azimuthally polarized beam. In addition, vector Fourier-Bessel transform pairs of an arbitrary polarized electromagnetic Wave with circular symmetry are also derived.
Jiabi Chen - One of the best experts on this subject based on the ideXlab platform.
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vector plane Wave Spectrum of an arbitrary polarized electromagnetic Wave
Optics Express, 2006Co-Authors: Hanming Guo, Jiabi Chen, Songlin ZhuangAbstract:By using the method of modal expansions of the independent transverse fields, a formula of vector plane Wave Spectrum (VPWS) of an arbitrary polarized electromagnetic Wave in a homogenous medium is derived. In this formula VPWS is composed of TM- and TE-mode plane Wave Spectrum, where the amplitude and unit polarized direction of every plane Wave are separable, which has more obviously physical meaning and is more convenient to apply in some cases compared to previous formula of VPWS. As an example, the formula of VPWS is applied to the well-known radially and azimuthally polarized beam. In addition, vector Fourier-Bessel transform pairs of an arbitrary polarized electromagnetic Wave with circular symmetry are also derived.
