查询词典 coherent

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.

为了研究部分偏振部分相干光光栅衍射场的衍射特性，利用部分偏振部分相干光的光束相干-偏振矩阵，推导出了部分偏振部分相干光通过任意偏振光栅后，衍射场的偏振度及场中衍射级次角相关的一般解析表达式。

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.

结果表明，部分相干余弦-高斯光束的M2因子与部分相干余弦-高斯光束的空间相干参量和离心参量有关，但与透镜的像散系数无关。

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.

基于最大似然接收机原理，详细分析了相干-非相干(Coherent-Noncoherent)积分算法，表征出该算法在高灵敏度条件下由于非相干次数增加带来的平方衰减，实测数据的分析证实了这个问题更为严重。

It's an agent of laser show equipment from COHERENT, SPECTRA-PHYSIC, PANGOLIN, MEDIALAS etc. It's a member of ILDA.

代理的专业激光表演设备有COHERENT、SPECTRA-PHYSICS、PANGOLIN、MEDIALAS等，是国际激光显示协会的会员。

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.

标 签 光纤光学相干合成非相干合成相位误差光束抖动 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.

其次，根据背景干扰和信号样式的不同，提出了单矢量水听器方位估计的4种方法；阐述了这4种方法的原理，并进行了计算机仿真，指出平均声强器方位估计适用于各向同性噪声场背景干扰，讨论了平均声强器的处理增益；目标辐射噪声中有线谱时，线谱方位估计有很好的性能，其中的LOFAR线谱和高频解调得到的DEMON线谱都是目标的特征谱线，可以利用它们进行方位估计，详细讨论了利用特征线谱单个矢量水听器分辨多目标的性能；直方图方位估计能抗强线谱相干干扰；加权直方图方位估计可以抗宽带相干干扰。

Our products have been supplying to quite some well reputed US and Eu reputed customers like BARR Associates, Oerlikon,Coherent,JDS Uniphase for years.

贝瑞光电90%以上的产品畅销欧美市场，拥有一大批诸如 BARR Associates，Oerlikon，Coherent，JDS Uniphase 等世界知名企业的长期客户。

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.

结果表明：Al-Mg-Si合金GP区与基体界面电子密度在一级近似下连续，GP区粒子易于长大，而β相不连续，抑制了β相再结晶晶粒的长大，但它在高应力下呈现连续，从而提高合金变形抗力。

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.

在平板湍流边界层的固壁表面沿展向开一条窄缝，用以施加局部周期性抽吸扰动，改变平板湍流边界层中不同尺度相干结构的能量分布、条件相位平均波形、平坦因子和猝发频率，从而对平板湍流边界层中原有的多尺度相干结构进行干扰和控制，以达到壁面减阻的目的。

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.

在平板湍流边界层的固壁表面沿展向开一条窄缝，用以施加局部周期性抽吸扰动，改变平板湍流边界层中不同尺度相干结构的能量分布、条件相位平均波形、平坦因子和猝发频率，从而对平板湍流边界层中原有的多尺度相干结构进行干扰和控制，以达到壁面减阻的目的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。