利用二次型解决了双协变量的方差分析方法。
In this paper, the authors expounded covariance analysis with two correlated variables and solved it with quadric form.
随机变量的方差衡量随机变量值与期望值偏离的程度。
The variance of a random variable measures how far from the expected value its values typically are.
本文给出了模糊随机变量的方差这一概念，并讨论了它的一些性质及计算方法。
This paper gives a new concept of variance of fuzzy random variables and discusses it's property and calculation.
很容易看到，项目的最开始，所有变量的方差都是高的，并在最后项目快完成时降低了。
It is easy to see that the variance of any of the variables is high at the beginning of the project and low at the end when completion is in sight.
这里的学习模型包括对于估测变量的方差估计，以及股票收益率与这个预测变量的协方差。
The learning model includes the volatility estimation of the predicative variables and the covariance of stock return and this predicative variable.
结果双变量多水平模型可以估计各水平两个变量的方差协方差阵，据此可以计算出相关系数随协变量变化的函数式。
Results Multilevel models can present the variance covariance metrics of two dependent variables in every levels, and make out the functional expresses of correlation coefficient with covariates.
协方差衡量的是两个变量一起变动的情况。
Covariance is a measure of how much two variables move together.
在深入学习更高级的技术(如多次回归或多变量方差分析)之前，对于简单线性回归的透彻理解将使您受益匪浅。
Before you plunge into learning more advanced techniques, like multiple regression or manova, you could benefit from having a solid understanding of simple linear regression.
3方差的专业定义是随机变量的二次中心矩，与期望值之差的平方的加权平均值。
The technical definition of variance is the random variable's second central moment, the weighted average of the square of the differences from the expected value.
不论我们前面是怎样的随机变量，不论未来有多大的方差，相信波谷过了，波峰还会远吗？
No matter how ahead of us is the random variables, no matter how the variance of future, believe the trough, wave be far behind?
实时估计出系统噪声方差矩阵和量测噪声方差矩阵，对状态变量进行灰色聚类，并对滤波矩阵和增益矩阵进行实时自适应调整，计算出状态向量的递推估计值。
Based on real-time estimation of noise matrix and grey clustering of state variable, filter or gain matrix is modulated so as to get an estimation of the state vector.
运用单因素方差分析、假设检验等多种统计方法，分析了柜台服务过程以及关键输入、输出变量的变化规律；
Rules of arrival rate and customer waiting time are found through multiple statistical methods, such as One-Way ANOVA and K-Related Samples Nonparametric Tests.
另一方面讨论了随机利率下的一些离散年金、连续年金和连续生存年金现值随机变量的一阶和二阶原点矩及其方差。
On the other hand, the moment, the second moment and variance of the present value random variables about some life annuities and annuities with random interest rate are gotten.
最后，我们还研究了一般生长曲线模型在不同可预测变量下的简单投影预测关于协方差阵的稳健性。
Finally, robustness of the simple projection predictor in the general growth curve model with different linear predictable variable on the covariance matrix are investigated.
地统计学的基础理论与方法主要包括：区域化变量、半方差函数、克立格空间插值技术。
The geostatistics's basic theories and techniques include the regionalized variables, the semivariance function and Kriging Interpolation.
介绍三种对多指标的质量控制方法，第一种方法是用一个标量控制多变量总体的均值向量和协方差矩阵；
Three approaches to Multivariate quality control are introduced. The first approach is to control the mean vector and covariance matrix of multivariate population in terms of one statistic.
方差是描述随机变量分布情况的指标，本文用方差来描述特征词在类间的分布情况。
Variance is an index that can describe distribution of random variables, and is used to describe inter-category distribution of feature term .
结论：在协方差分析中使用哑变量使对模型的理解变的简单，在方差分析中使用哑变量使得可以从回归的角度来理解模型。
Conclusion: It is easy to understand the analysis of covariance and analysis of variance can also be considered in regression analysis setting by defining appropriate dummy variables.
根据中心极限定理，以随机数为基础，设计了正态随机变量的结构公式，其数学期望和方差可任意给定。
On the basis of random numbers, The structure-formula of the normal random variable has been designed according to the limit theorem.
目的探讨协变量的不均衡对协方差分析的影响。
Objective To study the effect of covariate imbalance on analysis of covariance.
为求出随机特征对的方差，借助于模态截断概念推出诸特征值与特征向量对随机变量的偏导数。
Partial derivatives of eigenvalues and eigen vectors with respect to random variables for structures are deduced by means of the concept of mode truncation.
用最小方差准则来评价控制器的性能，仅需过程变量的常规闭环操作数据和过程的时间延迟特性。
It only needs routine closed-loop operating data and knowledge of the process time delay using minimum variance as a benchmark in controller performance assessment.
采用了基于群体适应值方差的早熟判断机制，同时提出了一种缩小混沌搜索的变量空间范围的新方法，提高了搜索效率。
The method of judging the local convergence by the variance of the population's fitness and reducing the searching space of variable optimized is proposed, which enhances the searching efficiency.
而方差和协因数有紧密联系，该文着重讨论协因数的统一变量简明计算及协因数的求逆方法。
While the covariance and association factor are closely linked, this article focuses on concise calculation of the unity of the variable and inverse methods of association factor.
结论只有满足假定条件，才可以保证重复观测资料单变量方差分析的有效性。
CONCLUSION The validity of the univariate ANOVA with repeated measures will not be ensured unless the presuppositions are satisfied.
结论只有满足假定条件，才可以保证重复观测资料单变量方差分析的有效性。
CONCLUSION The validity of the univariate ANOVA with repeated measures will not be ensured unless the presuppositions are satisfied.
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