covariance matrix

Frontier Portfolio and No-arbitrage Analysis with Singular Covariance Matrix

奇异协方差阵下前沿组合及无套利分析

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

To get robust algorithm of parameter estimation, the lower bound of uncertain parts generated by uncertain observation matrix in the expression of the error covariance matrix of parameter estimation is given.

参数估计采用了加权最小二乘算法，按照上界不等式对估计误差的协方差阵进行了估计，得到了鲁棒辨识的新算法。

An advantage of this method is that it can be applied when the covariance matrix of the invested projects is positive semi-definite.

该方法的优点在于能够处理各投资项目之间的协方差矩阵为半正定的情形。

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

Study on Decision-making Model for Portfolio Investment under Non-negative Definite Covariance Matrix Feasible Sets of Portfolios with Singular Covariance Matrix

非负定方差阵下的证券组合投资决策模型研究

This paper points out that we can use the density function of the Gaussian distribution to set a thinned array, extending the covariance matrix will advance the gain clearly.

提出利用高斯随机分布的密度函数设置稀疏阵列，在稀疏阵列得到的协方差矩阵经扩展后，增益有了明显的提高。

The key of the presented filter is to derive the best estimate of the covariance matrix of the unbiased converted measurements in the mean-square sense.

这种滤波器的关键是在均方意义下推导无偏转换测量误差协方差阵的最佳估计。

The polar concepts of the physical organic chemist are relevant to radical reactions.

物理有机化学家的极性概念能够适用于基反应.

In particular, for the particular application scenario of sparse arrays, the proposed algorithms directly illustrate the aperture extension capacity of the sparse array, and do not require the construction of augmented covariance matrix for DOA estimation. 3.

特别地，对于稀疏阵这一特殊应用场景，所提算法很好地阐述了稀疏阵的孔径扩展能力，且不需要构造增广协方差矩阵。

this is a convention that organic chemist's use when they're describing molecules like this.

这种称谓是一种惯例，是有机化学中描述像这样的，大分子时使用的。

because i want to be an excellent organic chemist, the best choice is to study in usa.

我想成为一个优秀的化学工作者，所以美国是最好的选择。

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。

The Mean and Covariance Matrix of Normal Random Matrix Polynomial

正态随机矩阵多项式的均值与协差阵

Besides, the mode of multiple sub-optimal fading factors in STF will destroy the symmetry and positive definiteness of the prediction error covariance matrix, which results in the filter divergence.

此外，多重渐消因子矩阵在原强跟踪滤波算法中的作用方式可能破坏误差协方差阵的对称正定性，导致滤波算法的发散。

The best invariant estimator of covariance matrix in multivariate linear model

多元线性模型中协差阵的UMVIQUE存在的充要条件

in recent years, nhcs have evoked renewed considerable interest of organic chemist as organocatalyst.

近年来，作为有机小分子催化剂，N-杂环卡宾引起了有机化学家的广泛兴趣。

The optimal portfolio selection of singular covariance matrix

奇异协方差矩阵的最优投资组合选择

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

I spoke to organic chemist Derek Lowe about this scenario.

我咨询了化学家德雷克o劳维。

A unified Variance components estimation in the Gauss-Markov model with a singular covariance matrix of observations and singular design matrix is discussed in this paper.

本文提出了一种适用于协方差阵奇异或非奇异、设计阵列满秩或降秩时的方差分量估计方法；

The risk function of the quadratic estimate for the covariance matrix Σ under a matrix loss function

矩阵损失下的协方差阵∑的二次型估计的风险函数

the pioneer of ethyne high pressure chemistry--german organic chemist walter julius reppe

乙炔高压化学的开拓者--德国有机化学家列培

because she had a background as an organic chemist and knew the field, the investor preferred a biotechnology sector fund.

由于这位投资人当过有机化学家，了解这个领域，因此她更愿意投资生物技术板块基金。

With the 'unique weapons'& covariance matrix different size, we may get a solution to contain subjective color, transparency in the evaluation process, to the reappearance of poor weaknesses.

自收敛法在进行两两比较上提供了有效的武器&方差的大小不同，如果以此为基础，则也可以解决层次分析法含有主观色彩，评价过程的透明性、可再现性差的弱点。

The model of region covariance matrix with discriminator will provide a new possibility for SAR target discrimination.

区域协方差特征加流形SVDD的鉴别模式为基于SAR图像的目标鉴别提供了一种新的可能。

The polar concepts of the physical organic chemist are relevant to radical r eactions.

物理有机化学家的极性概念能够适用于自由基反应.

A method of robust estimator is built by covariance matrix adjusted.

通过观测数据协方差矩阵的改进，建立了一种抗差参数估计方法。

Mapping ordered eigenvalue points of sample covariance matrix of the observation data onto Hough parametric space, the number of eigenvalues of noises can be estimated by detecting the peak points on Hough parametric space, and thus the number of signal source is determined.

该方法通过Hough变换将观测数据的采样协方差矩阵的排序特征值点投影到Hough参数空间，通过检测Hough参数空间中积累的峰值来估计噪声特征值的数目，从而确定信源的个数。

what organic chemist claimed that a dream featuring an ouroboros inspired his discovery of the structure of benzene?

是哪位有机化学家因梦到了衔尾蛇，从而启发了他发现苯的结构呢？