查询词典 covariance matrix

Furthermore,the characters of fitted model using matrix of covariance and correlation coefficient were also discussed in this paper

同时，本文还讨论了用协方差矩阵和相关系数矩阵配合模型的特点。

Meanwhile, in order to fix defect of former methods, an optimal source array weight matrix is presented to estimate Green's function matrix by analyzing the estimation covariance of Green's function matrix.

同时指出了现有方法存在的不足，并在此基础上通过研究格林函数矩阵的估计协方差，提出了一种最佳估计算法。

At last, the Double Message Signal is proposed and the non-interfere condition is presented that the steering vectors are orthogonal in the weighted inner product space, with the inverse matrix of background covariance as the weighting matrix. The optimal polarization states are designed, according to the EM background.

最后，提出了一种双信息信号传输的方案并导出了无互扰传输的充要条件：两期望信号的信号矢量在以干扰噪声协方差矩阵的逆矩阵为加权矩阵的加权内积空间中正交，在给定的电磁环境下设计了双信息信号的极化状态。

Secondly, when kalman filter has reached steady state its error covariance will have a very small stationary value, namely filter dropping off'. Thirdly, the traditional kalman filter cannot adjust its filter parameters with statistic characteristic of the noise. To overcome the deficiency of kalman filter, an SVD-based adaptive kalman filter is put forward in the paper. The filter restrains the filter divergence by matrix singular value decomposition. The eigenvalues and eigenvectors of the matrix are insensitive to tiny change of matrix element and acceptable error.

然而，传统的卡尔曼滤波器存在以下问题：问题一，因噪声统计特性估计不准确和计算机舍入误差引起的滤波发散现象；问题二，在卡尔曼滤波器达到稳态时，其误差方差阵将饱和使其对信号的突变变得不敏感，问题三，传统的卡尔曼滤波器对滤波参数无自适应能力，不能随着噪声统计特性的改变而调整自身的滤波参数。

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。

Second,normals and curvatures of vertices in the optimal neighborhood are estimated by covariance matrix analysis.

实验结果表明，多边滤波器在有效地去除噪声的同时，还能较好地保持点模型表面的几何特征。

In chapter three, using the special structure of the covariance matrix, we present a fast high resolution method based on QR decomposition.

探讨了利用QR分解得到信号与噪声子空间的可能性，提出了一类基于QR分解的高分辨快速算法及其改进型。

By whitening the covariance matrix of flat ambiguity, correlation between ambiguity components, the number of local extrema of cost function is reduced.

通过白化处理模糊度，减少模糊度搜索中指标函数的局部极值点，采用适当的编码和遗传操作使得在种群个体较少的情况下避免搜索陷入早熟。

Both of them use a proportion of training instances for covariance matrix computation. The instance selection of one method is based on the included angle defined by testing and training instances; that of the other method is according to the hyperplanes determined by paired-class centers.

这两种方法皆只使用部份的训练资料来计算共变异矩阵，其中一种方法的资料选取方式是以验证和训练资料所定义的夹角为基础，而另一种方法下的资料选取则是根据两两群体中心所决定的超平面。

This research bases on Dennis Pelletier's (2006)"Regime Switching Dynamic Correlation" model to estimate the covariance matrix through dividing the correlation into three regimes.

中文摘要本篇论文采用Denis Pelletier (2006)所提出的状态转换之动态相关系数模型，将资产报酬之相关系数分为三个状态，以估计其共变异数矩阵。

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