查询词典 coherent order

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 was found that the residual pulsant Reynolds stress term of coherent structures has the same order of magnitude with the Reynolds stress contribution term of random fluctuation and can not be ignored in the dynamic model of coherent structures. This is not as that estimated before.

研究发现，相干结构剩余脉动雷诺应力项在数值上具有和随机脉动对相干结构贡献的雷诺应力相同的数量级，表明在相干结构动力学模型方程中，相干结构剩余脉动雷诺应力项并不像以前佑计的那样可以忽略不计。

It is found that amplitude-squared squeezing can be created by 4-photon unitary operator S4 acting on the vacuum state and this shows that the amplitude-squared squeezing can be created by 4-photon unitary operator S4 acting on the vacuum state and this shows that the amplitude-squared squeezing is a new nonclassical effect of light field which is independent of the second order squeezing, antibunching and sub-poisson statistics.

发现4个光子么正算符S4对真空态的作用可以产生振幅平方压缩，这表明振幅平方压缩是一种独立于二阶压缩、反聚束以及亚泊松统计分布的新的光场非经典效应。标签 K光子么正算符相干态真空态振幅平方压缩 K-photon unitary operator coherent state vacuum state amplitudesquared squeezing

By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.

在窄带条件下，GSC－SSF方法还可以提高阵列的虚拟孔径，从而提高估计的性能；可以证明，Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似； 3、提出了二维GSC－SSF方法和宽带谱相关DOA矩阵方法，利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题，并具有阵元数少、计算量较小的特点； 4、提出了时频子空间拟合和宽带时频DOA估计算法，将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中，利用时变滤波实现信号选择性测向和干扰抑制，特别适合于谱时变信号；可以证明传统特征结构法可看作是时频子空间拟合方法的特例； 5、提出了多用户环境下阵列响应的估计方法——CARE方法，该方法对信号结构和传播参数（主要是散射源分布与角度散布）的约束较少，适用于各种几何结构的阵列甚至未校准的阵列，能够直接得到阵列响应的闭式解，因此计算量小、稳健性好，不存在收敛问题； 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案，通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束，并保证各波束内的用户信号各不相同且相互干扰最小；其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点，其有效性已得到外场实测数据的证实。

In this paper a new method is proposed in order to suppress the coherent interference. First, utilizing the interpolate method, the real array can be virtually shifted under coherent interference, several covariance matrice are gererated after the virtual shifting. By averaging the previous results, a new covariance matrix is obtained. It is a full rank matrix.

提出一种新的相干波束形成方法，利用内插变换对相干背景下的真实阵列进行虚拟平移，得到多个虚拟平移后的信号协方差矩阵；对其进行平均后，所得到的相干信号协方差矩阵具有满秩性。

The target system is brought to a new coherent order with less fundamental internal noise.

系统的目标是带来了一个新的连贯为了少的基本内部的噪音。

This would serve to bring electromagnetic phenomena to a new coherent order with less fundamental noise within the vicinity of the Clarus SRT devices.

这将有助于使电磁现象到一个新的连贯的秩序，减少噪音的根本附近的塞尔维亚广播电视台的设备Clarus 。

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。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了