协方差

The model this paper deals with is a flow line of two machines. By means of structured stochastic matrix theory and theory of Markov process, an effective algorithm obtaining the variance of end products in a given period is proposed.

讨 论的模型为两级的串行生产线，利用结构随机矩阵理论和马氏过程的协方差结构，给出了在一个给定时间区间内系统生产成品数方差的有效算法。

The next, the components withdrawed from PLS regression process are not all ideal, and among them there is a kind of component which has bigger covariance, however this component is weak in accounting for the dependent variables, which is primarily due to the fact that the independent variables is sneaked into more excrescent influences in that the variance becomes bigger.

其次，从偏最小二乘法运算的过程所提取的成分并不都是理想的，其中就有一种成分，他的协方差较大，主要是因为自变量系统中混入了较多的异常影响，从而造成其方差较大，但成分对响应变量的解释能力却不强。

Methods A randomized cluster sampling was performed to obtain a representative sample of population in Xinjiang Hefeng pastoral area.Blood wag taken from 632 individuals aged 30 and older for measurements of total cholesterol,triglyceride,hish density lipoprotein cholesterolby automatic biochemieal analyzer.The serum levels of low density lipoprotein cholesterolwas calculated according to the formula.

采用整群随机抽样的方法选取新疆和丰县牧区年龄≥30岁的牧民632人为调查对象，其中哈萨克族325人，蒙古族307人；抽取空腹12 h静脉m 3ml，采用日立7600全自动生化分析仪测定血浆总胆固醇、甘油三酯、高密度脂蛋白胆固醇的浓度，并根据公式计算出LDL-C的浓度，对资料进行汇总，并采用t检验、方差分析或协方差分析的方法观察两民族间血浆LDL-C水平的差异，并进一步采用多元逐步同归分析的统计方法研究其影响因素。

Based on Current Statistical Model for target tracking, a modified maneuvering target model and adaptive filtering algorithm is presented by acceleration and the relation between maneuve trix of process noise.

在&当前&统计模型的基础上，通过修正目标加速度的概率分布、机动加速度与方差的自适应关系及过程噪声协方差矩阵，提出了一种修正的机动目标模型及其自适应跟踪算法。

The linear mixed-effects model presented by Laird and Ware(1982) is a more flexible model for repeated measures. Upon substitution, the linear mixed-effects model can be always expressed in terms of the two stage model and vice-versa.

线性混合效应模型最早由Laird和Ware(1982)提出，它在分析重复测量资料时非常灵活；同时按照替代法，在一定条件下，线性混合效应模型与两阶段模型可相互转化；此外，线性混合效应模型在对不同方差—协方差结构建模时更加便捷。

Research and development staff are provided with on-line guidance for basic univariate and bivariate statistics, analysis of variance, analysis of covariance, and regression analysis, as well as graphical tools for producing scatter plots, histograms, and box-and-whisker plots.

研究和开发人员被提供了在线的基本单因素和二元统计、方差分析、协方差分析和回归分析以及图形化工具生产散点图，直方图，以及箱线图。

Commonly required capabilities for analysis of variance, analysis of covariance, and regression analysis are closely linked with graphical tools that produce scatter plots, histograms, box-and-whisker plots, and contour plots.

通常所需的方差分析，协方差分析和回归分析的能力是和能够产生散点图，直方图，箱线图，等高线图的图形化工具密切联系在一起的。

Based on the Lyapunov equations, the formulas of computing local predicting error variances and covariances are given, which are applied to compute optimal weights.

其中提出了基于Lyapunov方程的局部预报估值误差方差阵和协方差阵计算公式。

The main results achieved are:The computation of the means,variances,and covariances of logistic orderstatistics for sample sizes 〓 and some other selected values up to 100 byusing FORTRAN computer programs and showing that similar results for otherdistributions can easily be achieved with slight modification to the programs.

对〓的样本量和某些挑选的高达100的样本量，用FORTRAN计算机程序计算了Logistic的顺序量的均值、方差和协方差，得到了有关的数据文件。

Since many difficulties exist in the design of equivalent weight with correlated observations, the concept of equivalent variance-covariance is presented.

鉴于相关等价权的构造非常困难，提出了等价方差-协方差概念。

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