We obtain two formulas about the covariant derivative of the coordinate functions on the unit sphere in Eucdidean space.

Physical Essence of Introducing Covariant Derivative into Gauge Theory

规范场论中引进协变导数的物理实质

Based on the nonlinear mapping relationship between the complex non-Gaussian covariance sequence and Gaussian covariance sequence, the proposed scheme can realize specified distribution and covariance.

所提出的方案基于复数非高斯协方差序列与高斯协方差序列之间的非线性映射关系，能够实现指定的包络分布与协方差。

Due to the use of real value covariance matrix, the proposed algorithms have lower computational complexity when compared with the conventional complex value covariance matrix based MUSIC algorithm.

和传统的基于复数特征分解方法的MUSIC算法相比，我们采用实数协方差计算，所提出的酉空间的MUSIC和求根MUSIC算法具有更低的复杂度，但是具有相比拟的性能。

The algorithm transforms the complex covariance matrix into a real matrix using an unitary transformation and then the real matrix is inversed and eigen-decomposed for adaptive beamforming so it has a low computation complexity in comparison with the ESB adaptive beamforming algorithm.

该算法利用酉变换将复协方差矩阵转换为实矩阵，然后对其求逆和特征分解进行自适应波束形成，因此其运算量比ESB自适应波束形成算法小得多。

The orthogonal projection ( OP) adaptive beamforming algorithm has good performance but it is computationally expensive because of performing eigen-decomposition of the complex covariance matrix.

正交投影（OP）自适应波束形成算法性能优良，但需要进行复协方差矩阵特征分解，运算量大。

Correct application of analysis of covariance

协方差分析的正确应用

Method: Dummy variable is used for analysis of covariance and analysis of variance.

方法：在协方差分析与方差分析中使用哑变量。

Finite multiple burn orbit transfer error analysis via covariance matrix

利用协方差矩阵研究有限多次点火时轨道转移误差

Analysis of Covariance and Its Application to Epidemiologic Research

协方差分析及其在流行病学研究中的应用

Analysis of Covariance Which is the Ultimate Law of Library Science Development

关于图书馆学发展的根本规律&协变性之分析

A Study on Numerical Accuracy of Inversion of Covariance Matrix Based on DSP

基于DSP的协方差矩阵求逆的数值问题研究

Determining the Number of Coherent Signal Based on Covariance Matrix transforming

基于协方差矩阵变换的相干源个数估计

On the Treatment of Joint Control for Mean Vector and Covariance Matrix

均值向量与协差阵联合控制的处理方法

Random Weight Method for Covariance Matrix Recovery from Single Receiver Output

单通道接收机协方差矩阵的随机权恢复方法

Influence Analysis in Restricted Growth Curve Model with Covariance Matrix Disturbance

协方差矩阵扰动约束生长曲线模型的影响分析

Comparative Research on Main Components Analysis with Covariance Matrix and Correlation Matrix

协方差矩阵和相关系数矩阵下主成分分析比较研究

We analyze the ergodic capacity function by exploiting its property of schur-concavity, and develop a necessary condition for eigenvalues of the optimal input covariance matrix to characterize the properties of the transmit power distribution for achieving capacity.

我们通过平均信道容量函数的舒尔-凹性质对其进行分析，推导了最优输入协方差矩阵特征值分布的必要条件来刻画最优化的发射功率分配。

Approximations of local covariance function s of gravity anomaly

局部重力异常协方差函数逼近

According to the statistic characteristic of covariance function, parameter estimation can be given for kernel function.

由协方差函数的统计特征，可给出核函数的参数估计。

Influence of the parameter of covariance function on result of the least squares collocation

协方差函数的待定参数对最小二乘拟合推估精度的影响