查询词典 systematic sample

Obiective: To introduce the method of multiple corresponding analysis in correlation analysis of big sample, and offer a reference statistical method to clinical and basic medicine researchers who take the design of big sample categorical variable in TCM.

目的：介绍应用多重对应分析方法实现对大样本分类变量之间的相关性分析，旨在对大样本疾病信息采集资料的临床和基础科研工作者提供可借鉴的统计学分析方法。

After extending the definition of tangent distance,we extract the directions of variance of sample sets using Singular Value Decomposition based onthe original image, and use them as the tangent vectors of training sample sets.

本文把切线距离的概念进行了进一步的延伸，在原始图像的基础上，用奇异值分解方法直接提取样本集合中所包含变化的方向，作为训练样本的切线向量。

R2 The adjusted R2 is 1 minus the ratio of sample variance of the OLS residuals (after correcting the degrees of freedom) to the sample variance of y.

调整过的R2是1减去OLS残差的样本方差与y的样本方差之比。

VAR calculates sample variance of the given sample.

"，"VAR 根据范例估计方差。VARP 根据全部基数计算方差。

Another advantage of these improved methods is the flexibility of rendering multiple volume data sets. There is detailed analysis and experimental proof of this flexibility. Besides, since the sample variance can reflect sample value distribution, an enhancement algorithm based on variance statistic is proposed.

另外，本文根据样本距统计量能够反映样本数据值分布的特点，提出基于方差统计的增强算法，绘制结果能够突出显示局部方差统计值较大，即结构分布较复杂的区域。

Acquired conclusion was that the sample mean value submitted to normal distribution, and the sample variance was composed of a number of linear sum of random variable submitted to Chi-Squared distr.

得出的结论是：样本均值服从正态分布，样本方差由若干个服从卡方分布的随机变量的线性之和组成；样本均值的期望等于各管落点期望的算术平均值，方差为各管方差的算术平均值；样本方差是各管落点总体平均方差的无偏估计，方差与各管落点散布的差异相关；样本均值与方差相互独立的充要条件是：各管落点属于独立同分布样本。

This paper introduces the distribution of sampling points and water sample analysis method and analyzes pollution components of N, P and COD in water sample.

介绍了水质采质采样点的分布情况和水样分析方法。对水样中的N、P污染成份及COD进行了分析。

Generally, the background of individuality in the population is abundant. If the sampling ratio is small, the structure of sample may be different from that of population and the sample may lack representativeness.

由于一般情况下，总体中个体的背景因素差异非常大，若抽样比例较小，则会导致样本的结构与总体的结构不一致，样本缺乏代表性。

Moreover,we study the sample support of homoge-neous O-U superprocess,and prove that the sample of this process canbe supported on a Hilbert subspace of the Schwartz space of tempereddistributions.

进而，讨论时齐O-U超过程的轨道支撑，证明了该过程的轨道可支撑于Schwartz分布空间的某个Hilbert子空间（定理1.9）。

Rarely, a sample of skin scrapings or a small sample of skin will be sent to the laboratory for examination under a microscope.

很少，样本皮肤scrapings或小样本的皮肤将被送到实验室检验在显微镜下观察。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。