样本方差

基于这些展开式，在N很大时证明了经验Bayes估计要比常用方差估计（组内样本方差）有更小的均方误差。

Based on these expansions , the empirical Bayes estimator is shown to have smaller mean squared error than the customary variance estimator , i. e. , the within group sample variance , if N is large .

通过构造数据集的近邻图和非近邻图，DVE算法对样本方差采取了不同的处理方式，使低维表示全局方差最大的同时保持局部方差不变。

By constructing the neighborhood graph and non-neighborhood graph , DVE deals with the sample variance distinguishingly , that maximizes the global variance and simultaneously preserves the local variance .

基于投票样本方差的Hough变换权值积累方法

A Sample-variance Based Weight Accumulation Method for Hough Transforms

新stats函数的函数体要略加修改，以计算数字序列的样本方差。

The body of the new stats function is modified slightly to calculate the variance of the numerical sequence .

实验结果数据采用均数±标准差表示，组间差异比较用单样本方差t检验，P0.05表示有统计学差异。

The results of data using mean ± standard deviation of that group differences between single - sample t test of variance , P 0.05 indicated statistical difference . Results : 1 .

MPSD是一种检测性能与计算量折中的算法，检测性能损失非常小。（3）提出一种基于噪声样本方差的分层统计的裁剪算法（LPSD）。

MPSD is a compromising algorithm between detection performance and computational complexity , which has a very small performance loss . ( 3 ) It proposes a layered statistical pruning algorithm based on variance of the noise samples ( LPSD ) .

这种估计实际上是先验方差与样本方差的凸组合。

The estimates are the convex combinations of prior variance and sample variance .

数据处理采用t检验，相关分析和单因素独立样本方差分析。

Data were analyzed with student 's t test , correlation analysis and univariate dependent sampling analysis of variance .

进一步考虑到工程实际中当次可靠性试验的样本方差具有较大不确定性的因素，提出了基于对数标准差经验值的t分布可靠性评估方法。

Further , considered the considerable uncertainty of current sample variance , a reliability estimation method based on t-distribution theory and empirical logarithmic standard deviation is proposed .

此外，本文还采用样本方差分析方法研究了单层结构和薄壁墙零件的表面质量与工艺参数的关系，并根据单层结构对实体成型的影响优化了实体成型的工艺参数。

The relationships between the process parameters and the surface quality during forming multi-tracks and thin walls were studied by the use of sample variance analysis method .

按极大似然法原理计算出三种规格的预制直埋供热管和回填砂的摩擦系数以及样本方差的估计值，并按照摩擦系数和样本方差的估计值进行了摩擦系数的区间估计。

By using maximum likelihood method , the friction factor and estimate value of sample variance are obtained , and the interval estimation of the friction factor is gotten .

运用双样本方差分析，双样本假设、差异显著性检验等几种统计方法，分析了六阶段思维策略训练的课堂操作模式对学生思维能力、创新意识、学习成绩的影响。

The analysis of how the training model influenced the students ' thinking ability , creativity and study performance is done by using a few statistical methods including analysis of double samples ' variance , supposition of double sampling , testing of significant difference .

政府行政行为对农村金融发展的影响度只有20.07%的水平，但其样本方差小，说明政府行政行为对农村金融发展的影响作用比较稳定，不容小视。

Governmental administration of the rural financial developmental factor reaches the level of 20.07 % , but the sample variance is quite small , which shows that the role of the governmental administration of the rural financial development is more stable and should not be overlooked .

在此基础上数学界将实际工作中各种可能始点的抽样方法赋予理性思考、研究，获得结论：无限制抽样和简单随机抽样条件下样本方差是总体方差的无偏估计量。

On this basis , Mathematics circle give rational thinking and study of different sample methods In the real work and obtain the conclusion : The variance of the sample is that population variance has no estimator of leaning towards in sampling unrestrictedly and Simple random sampling .

带限条件下频率闪烁噪声N样本抽样方差的精确解

Under Limited-Band Condition the Precise Solution of Sampling Variance with N-Samples for Frequency Flicker Noise in the Frequency Sources

在将波动率当中的连续样本路径方差和离散跳跃方差有效地分离开后，文章选用异质自回归类（HAR）模型来对波动率建模预测。

Based on the separation work of continuous sample path variance and discrete jump variance , heterogeneous autoregressive ( HAR ) model is used here for volatility modeling and forecasting .

估算基于给定样本的方差（忽略样本中的逻辑值及文本）

Estimates variance based on a sample ( ignores logical values and text in the sample )

同时，研究者采用教育学统计测量软件SPSS13.0分析，多个样本的方差检验，对三个活动中的解释水平情况进行相关检验。

Meanwhile , researchers use SPSS statistical measurement of edition 13.0 to measure multiple samples of three groups of variance by comparing interpreting level .

传统的计量经济学模型往往假定样本的方差恒定不变，但随着金融理论的深入发展，这一假设已逐渐呈现出其不合理的方面。

Variance is supposed to be constant in the traditional econometric model . But with the development of new research , the hypothesis is proved to be improper .

本文指出了曹胜炎等〔1〕论文中的一些结论在RaoC.R〔2〕文中已有论述，并且采用更为简捷的方法证明了文〔1〕的定理。另外，给出了常相关样本的方差分析。

This paper is simply proved the theorems in the paper [ 1 ] , and is discussed the variance analysis from normal populations with samples of constant correlation .

应用t-检验：双样本等方差假设及两个正态总体均值的假设检验方法对测得的人体各生理指标数据进行分析，得出了室内热环境参数影响人体各生理指标的显著程度及趋势。

Apply t-test analysis methodology to analyze the physiological data of human body , then acquire visible influence degree and trend of indoor thermal environment parameters on physiological indexes of human body .

NA样本下变方差模型估计的强相合性

Strong Consistency of Estimator in Heteroscedastic Model under NA Samples

并以XX银行XX分行为研究样本，通过方差检验的方法验证了自我效能感在不同样本间的显著差异性。

With the xx branch of XX bank as research sample , this study secondly verified the significant difference of elf-efficacy among different samples by using the variance test method .

截断情况下独立随机变量样本均值和方差的近似分布

And variance of a sample of independent variables with censored data

数据有所变动的样本均值及方差的简易求法

Simple Way to Get Average and Variance When Datum of Samples Change

通过多次估计的均值作为参数的近似值，采样的样本数通过方差系数确定。

The parameters ' approximate values are ensured by the average value of several estimate , and the sample number is ensured by the variance coefficient .

方差已知（或大样本）、方差未知（或小样本）的情况下的数据融合方法估计正态分布母体均值的置信区间。

The expression to estimate confidence interval of normal distribution mean-value : which was deduced with knowing variance ( large sample ) and unknowing variance ( smallsample ) .

讨论了小样本三维同方差正态分布整体检验射击精度问题。

This paper discusses the problem of test with few samples in Shoot Precision by applying 3-dimension Normal distribution with the same of variance in x , y and z direction .

定量指标组内比较使用配对检验，组间比较使用独立样本检验或方差分析，定性指标主要用检验或秩和检验。

Quantitative indicators were compared using the paired test , analysis of variance using independent sample test and comparison between groups , qualitative index is mainly used for test or rank sum test .

数据使用SPSS13.0进行描述性分析、独立样本t检验、方差分析、多元线性回归分析、相关分析和Logistic回归分析等。

The data were analyzed with SPSS 13.0 by descriptive analysis and independent sample t test and anaylsis of variance , multiple factor linear regression and pearson correlation analysis and Logistic regression analysis and so on .