In order to study the grating diffractive field's characteristics of the partially polarized and coherent beams, an analytic expression of polarization degree and angular correlation of partially ploarized and coherent beams through polarized gratings is derived based on the beam coherentce-polarization matrix approach of partially coherent beams.

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It is shown that the M2 factor of partially coherent CsG beams is dependent on the spatial coherence parameter and the decentered parameter of partially coherent CsG beams,but independent of the astigmatic coefficient of the lens.

結(jié)果表明1024手机免费视频，部分相干余弦-高斯光束的M2因子與部分相干余弦-高斯光束的空間相干參量和離心參量有關(guān)av激情综合，但與透鏡的像散系數(shù)無關(guān)。

Based on the Maximum Likelihood receiver principle,Coherent-Noncoherent integration is analyzed. It has serious square loss Characterization, especially in real data. Differentially coherent integration algorithm which is frequently used in spread spectrum communication is analyzed in detail for high sensitivity signal detection.

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For phase error with root-mean-square value of π/3, more than 90% energy of the totally coherent combining counterpart will be contained in the target area with radius of 5.6 cm.

標(biāo) 簽 光纖光學(xué)相干合成非相干合成相位誤差光束抖動 fiber optics coherent combining incoherent combining phase error beam jitter

Secondly, 4 methods of azimuth estimation based on vector hydrophone according to forms of nosie and signal are brought forward. The principles of these 4methods are set forth, simulating them by computer. Acoustic intensity averager can effectively suppress isotropic non-coherent interference; DOA based on line-spectra can effectively detect the target radiating line-spectra and estimate its azimuth angle; Bar graph approach can suppress line-spectra coherent interference and distinguish different targets radiating line-spectrum. Weighted bargraph approach can detect target in broadband coherent interference and estimate its azimuth angle.

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The results suggest that the electron density of the interface between GP zone and the matrix is coherent under the first order approximation, thus particles of GP zone are prone to growing, while β phase is not coherent, which will restrain recrystalization particles of β phase from growing, however β phase is coherent to enhance resistance to deformation of the alloy under high stress.

結(jié)果表明：Al-Mg-Si合金GP區(qū)與基體界面電子密度在一級近似下連續(xù)日韩区小视频.免费，GP區(qū)粒子易于長大国产精品欧美一区色，而β相不連續(xù)，抑制了β相再結(jié)晶晶粒的長大鸥美理论在线，但它在高應(yīng)力下呈現(xiàn)連續(xù)天天色狠狠干，從而提高合金變形抗力。

The dynamic course of multi-scale coherent eddystructures'bursting is researched. A periodic blowing/suction forcing, issued from a thin latitudinal slot onthe wall, is introduced to alter multi-scale ingredients of coherent eddystructure and their energy distribution in turbulent boundary layer, what ismore, to perturb and control the coherent eddy structures in order toaccomplish drag reduction of skin friction.

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The dynamic course of multi-scale coherent eddystructuresbursting is researched.A periodic blowing/suction forcing, issued from a thin latitudinal slot onthe wall, is introduced to alter multi-scale ingredients of coherent eddystructure and their energy distribution in turbulent boundary layer, what ismore, to perturb and control the coherent eddy structures in order toaccomplish drag reduction of skin friction.

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