random sampling的例句大全

Two kinds of estimators were compared under PPS sampling and simple random sampling with replacement.

本文在PPS抽样方案和有效回简单随机抽样方案的情形下构造了这两种估计并精确比较了它们的优劣.

This study is a significant reference to the composite random sampling of bulk materials in practice.

该项研究对于大宗货物的实际随机取样具有重要参考价值.

We did the random sampling of five pieces per batch of 100.

我们在每批一百件的货品中取五件随机抽样.

METHOD Random sampling study and collect data by questionnaire survey and examination.

方法采取整群随机抽样,信函问卷、实地测试等调查.

In a simple random sampling, the sample mean is an unbiased estimate of the population mean.

在简单随机抽样中, 样本均值是总体均值的无偏估计.

Methods: The number of samples was calculated with the optimum allocation stratified random sampling survey.

应用最优分配随机分层抽样方法确定调查点.

Methods Stratified chester random sampling.

方法采用分层整群随机抽样的调查方法.

CLAP adopts the random-sampling technique to make the clustering algorithm to be more efficient.

CLAP算法通过使用随机抽样技术,提高了聚类算法的效率.

Survey is also available web for input from clubs that were not in the random sampling.

调查也扩及由扶轮社于网上输入资料,这并不包括在随机抽样中.

This study adopted two-stage random sampling method. The valid subjects were 300.

本研究采二阶段随机抽样方法, 有效样本共300位.

The generalization of post stratification from the simple random sampling to complex design is discussed.

此外,我们探讨复杂抽样下,该估计值的推广.

Methods A random sampling inspection could be combined with special-purpose rectification.

方法突击抽样检查和专项整顿相结合,抽样比对.

Methods Cluster sampling and random sampling Methods: Were used to choose the subject.

方法采用整群随机抽样和单纯随机抽样方法确定调查对象.

This paper builds up portfolios through random sampling the securities in Shen and Hu security market, and studies the distributions of portfolio weekly return time series.

本文采用随机等权重有放回抽样方法，以周收益率为指标，以沪深A股为样本股，对组合收益率时间序列的分布特征进行实征研究。

In order to investigate the wild edible mushroom resources in Western Qing Tombs areas, survey was made along the line or by random sampling from different places during 1983-1984. 19 species belongin;

1983～1984年，笔者对清西陵地区野生食用菌资源进行了沿线调查或随机抽样调查，对采到的标本进行了室内鉴定。

The improved DDST intelligence examination was done on 67 cases of endemic cretinism in Qinghai through random sampling and had got developmental quotient ( DQ).

通过随机抽样对青海省67例地克病患者做改进后的DDST智能检查，取得发育商。

Male healthy NZW rabbits were selected and divided into 4 groups with the method of random sampling: standard rabbit small particles breeding group ( SC group);

实验选用健康雄性新西兰大白兔。采用随机抽签法分为4组标准兔小颗粒饲养（SC）组；

While Monte Carlo ( MC) methods are based on random sampling, Quasi-Monte Carlo ( QMC) methods use deterministically chosen points known as low discrepancy sequences.

蒙特卡罗方法（MC）采用的是随机抽样生成的样本点，而拟蒙特卡罗方法（QMC）生成的是确定性的点列（低偏差序列）。

Methods Quantitative spot investigation and random sampling and qualitative FGDs were adopted for village leaders.

方法调查人员采用现场观察和随机抽样问卷调查的定量方法进行；对村骨干人群采用专题小组讨论的定性研究方法；

[ Methods] Investigation was conducted in residents over 15 from 6 villages and 3 street district with multiplestage stratified chester random sampling method in Wuhan in 2002. [ Results] Of the 356 people investigated, the morbidity rate of the disease was 2.81%.

[方法]2002年用多阶段分层整群随机抽样方法，抽取武汉市蔡甸区3个街、6个村的部分15岁以上居民进行调查。[结果]调查356人，糖尿病患病率为2.81%。