协方差

QoS约束的协方差矩阵锥度波束成形算法分析

Covariance Matrix Taper Beam-forming Algorithm Analysis Based on QoS Constraints

一种Kalman滤波系统误差及其协方差矩阵的半参数估计方法

A semi-parametric estimation method of systemic errors and covariance matrices in Kalman filter

函数模型描述的是观测值和待估参数之间的物理和几何关系，随机模型描述了GPS观测值的统计特征，并通过观测值的方差协方差给定了每个观测值对最后的定位结果的贡献。

The GPS functional model describes the relationship between the observations .

GPS观测量先验方差-协方差矩阵实时估计

Real-time Estimation of a Prior Variance-covariance for GPS Observations

本文提出了一种GPS观测量的先验方差-协方差矩阵的实时估计方法。

A real-time estimation of a prior variance-covariance for GPS observations is suggested in this paper .

v，b的自协方差估计b均为渐近无偏估计；

For example , moment estimation (?) , of c_v and autocovariance estimation (?) of b are asymptotically unbiased estimators ;

Mixed过程提供了丰富的协方差结构，可以充分利用重复测量资料的信息，又能处理缺失值，是重复测量资料最优的统计分析方法。

And the MIXED procedure of the SAS System provides a rich selection of covariance structures through the RANDOM and REPEATED statements .

由于协方差对加性脉冲噪声的敏感性，传统的各种MUSIC算法会出现不同程度的退化，且收敛速度较慢。

Because covariance is sensitive to additive impulsive noise , conventional MUSIC algorithms become degenerative to various degrees and the convergence rate is slow .

一种基于分数低阶协方差的自适应EP潜伏期变化检测方法

A Fractional Lower-Order Covariance Based Adaptive Latency Change Detection for Evoked Potentials

方差&协方差分量的LS估计和有偏估计

Least Squares Estimation and Biased Estimation for Variance-Covariance Components

用多元协方差分析调整某些混杂变量后，高盐饮食组血浆粘度仍显著高于低盐饮食组（P＜0.05）；全血粘度在各组之间差异仍不显著（P＞0.05）。

After adjusted with confounding factors PV still showed a significant different by multi covariance analysis for the higher salt intake than lower one ( P < 0 05 ) .

协方差分析的SAS实现方法

The Application of SAS in Covariance Analysis

首先使用采样数据协方差矩阵的幂（Power）获得噪声子空间的估计，然后对噪声子空间进行OR分解并使用R矩阵估计信源个数，提出了无特征分解的信源个数检测算法&SDWED算法。

Firstly , the estimation of noise subspace is obtained by the power of covariance matrix and a novel source number detection method without eigen-decomposition is proposed based on QR decomposition .

具有MA（q）误差线性模型协方差阵参数的分步估计与Bootstrap算法

Two Steps Method and Bootstrap Algorithm for Covariance Parameters for Credibility Regression Models with Moving Average Errors

以常速模型为基础，分析了根据机动输入来调整过程噪声协方差矩阵Q的原则。

Based on the constant velocity model , the principle of how to adjust the process noise covariance matrix Q is analyzed .

一种基于SVD协方差加权技术的光流估计算法

Optical Flow Estimation Based on SVD Covariance Weighted Techniques

传统的金融计算大多基于多元联合正态分布，运用方差&协方差法来求解投资组合（Portfolio）的在险价值（Value-at-Risk：VaR）。

Variance-Covariance Method is generally used to calculate the portfolio 's VaR ( Value-at-Risk ) in traditional Finance Metrology based on multivariate normal distribution .

表明：基于氨基酸组成和有偏自协方差函数为特征矢量的BP神经网络预测蛋白质二级结构含量的方法可有效提高预测精度。

It is shown that the BP neural network method combined with the amino-acid composition and the biased auto-covariance function features could effectively improve the prediction accuracy .

利用协方差矩阵检测CFA插值的相机来源鉴别方法

Identification of source cameras based on CFA interpolation algorithm detection using covariance matrix

关于协方差矩阵不可逆时MARKOWITZ模型的求解问题

A New Algorithm on Solving MARKOWITZ Model with Inversible Covariance Matrix

实证研究表明，这种方法比传统的方差-协方差法、半参数法和Laplace分布法要好些。

An empirical analysis shows that this method is better than Normal distribution , Laplace distribution and semi-parameter approach .

具有Rao的简单协方差结构的生长曲线模型的局部影响判断

Local Influence Analysis in a Growth Curve Model with Rao 's Simple Structure

阐述了协方差分析描述函数法（CADET）的主要内容，并结合一战术导弹非线性模型，展示了CADET法在导弹命中概率评估中的应用。

The main contents of Covariance Analysis Description Function Technique are interpreted .

统计分析采用SPSS11.5软件，采用有交互作用的双因素协方差分析，考察影响血清HA水平的主要因素。

SPSS 11.5 software was used for statistical analyses . The factors influencing serum HA level were analyzed by double variate analysis of covariance with interaction .

应用扩展卡尔曼滤波算法将GPS测量方程和SINS动态线性化，进行SINS验前状态估计及其误差协方差时间更新。

Extended Kalman filter is applied to linearize GPS measurement model and SINS , then the state estimation and error covariance time-update of SINS are accomplished .

传统MUSIC算法需要对接收数据的协方差矩阵进行特征值分解，在阵元多和采样拍数较多的情况下，计算复杂度高，且无法消除色噪声的影响。

The traditional MUSIC algorithm need the eigen-decomposition of the covariance matrix , when the array elements and the snapshots are more , it has high computational complexity and cannot eliminate the effection of colored noise .

研究了短时间序列的波达方向估计问题，提出改进的伪协方差矩阵以及相应的DOA估计算法。

The direction finding of the short sequences is investigated , and a modified pseudo-covariance and DOA estimation algorithm is presented . 4 .

传统的子空间方法需要准确的信道长度估计或协方差矩阵秩估计，并且因为采用SVD（singularvaluedecomposition）分解而需要很大的计算量。

The traditional subspace methods require accurate channel length estimation or rank estimation of the correlation matrix and demand a lot of computation for the SVD ( Singular Value Decomposition ) .

接着，本文介绍了VaR计算的三个基本方法，分别为参数法（方差&协方差法）、历史模拟法和蒙特卡罗模拟法。

This article described the three basic methods for computing VaR , parameter method ( variance-covariance method ), historical simulation and Monte Carlo simulation , respectively .

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