协方差

Unlike the uniform linear array,the unform circular array is able to provide 360°azimuthal coverage,within the mode space,it has the covariance matrix of the Toeplitz-like struture while all sources are uncorrelated,with which the noise variance can be made out directly,note that will eliminate an eigendecomposition when the ESPRIT is applied,consequently reduce the computational load.

对于均匀圆形阵列，在信源都是非相干信源的情形下，由于模式变换后的协方差矩阵具有类Toeplitz的特征，因此，我们可以根据这种特殊的性质，直接求得噪声分量，因此若使用ESPRIT算法进行波达方向估计，就可以避免第一次特征分解，较大程度上减少了计算量。

The transmitter takes advantage of the eigenvectors of the SCM of the correlated channels to spread and weigh the signals of each layer. The spatial eigenbeams are formed to carry the signals being spread. The receiver distinguishes the signals from different beams via dispreading operations; therefore co-channel interferences are eliminated effectively.

发射机利用信道空域协方差矩阵的特征矢量，对每一层发射码元进行扩频和特征波束形成加权，形成正交的空域特征波束来承载扩频后的信号码元；接收机则通过解扩处理分离来自不同波束上的信号，有效地抑制了共信道干扰。

Based on the scatted data , a suitable method has been proposed in this paper , in which the least eigenvector of covariance matrix for the local data points is used as the normal vector of the data .

这里针对散乱测量数据点云，以局部数据点协方差矩的最小特征向量作为数据点的方向矢量，并根据实际测量情况，对基于二次曲面拟合的数据点曲率估算算法进行了改进。

In this paper the rocket of 122mm, 20km is exampled, CADET is used in random ballistics system with the action of random wind by use of sharping filter when the differential equations of sharping filter and angle motion equations of ballistics are allied.

以某火箭弹为例，在随机风场作用下，利用纵风作用下的随机弹道系统成形滤波器，把成形滤波器的微分方程和外弹道角运动方程联立，对此系统采用协方差分析描述函数法，对火箭弹的散布进行了计算。

Our model is suited to the statisticalanalysis of covariance and could potentially be used to comparethe effects of covariants on labor pain and the rate of changeof pain.

该模型适用於统计分析影响因素的协方差，并可用於比较各影响因素对产痛及其变化的影响。

Covariance analysis ; constant of earth gravitation

协方差分析；地球引力常数

Spatial pattern of the sea surface temperature appears a basin mode consistent with the isobaths in SCS, while the wind field exhibits a weak winter or summer monsoonal characteristic. The MOCM in different season may reflect a positive SST-evaporation-wind feedback which may be stronger in winter than in other seasons.

结果发现；第一模态为最显著模态，模态协方差贡献比在四季均超过80%，空间上SST表现为与南海等深线相一致的海盆模态，风场上主要表现为弱的冬季风或弱的夏季风，各个季节的海－气耦合模态都主要反映了SST-蒸发－风反馈这样1种正反馈的海－气相互作用过程，而且冬季风期间这种相互作用要更强烈些。

Finally, the splats are rendered from far to near by using elliptical weighted average filtering.

首先根据构造的移动最小二乘曲面计算采样点的表面几何属性，然后根据协方差分析确定点元在其切平面上的椭圆表示，最后采用椭圆加权平均滤波从远到近单遍绘制各点元。

Based on moving least squares surface, the differential properties of each sample point on PSO are first evaluated. In terms of covariance analysis, the elliptical splat of sample point is then determined on its tangent plane. Finally, the splats are rendered from far to near by using elliptical weighted average filtering. According to the differential properties, moreover, the suggestive contours of PSG are attained so that non-photorealistic rendering of PSG is realized.

首先根据构造的移动最小二乘曲面计算采样点的表面几何属性，然后根据协方差分析确定点元在其切平面上的椭圆表示，最后采用椭圆加权平均滤波从远到近单遍绘制各点元，此外，根据表面几何属性确定点模型的轮廓线，实现了点模型的非真实感绘制。

But when there are outliers in the sample, these methods are easily affected by them.

但是当样本数据中包括离群值时，计算结果就会很容易受到这些离群值的影响，这是因为传统的均值向量和协方差矩阵都不是稳健的统计量。

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