1)stratified random sampling分层随机抽样
1.The simple random sampling plan and stratified random sampling plan has been introduced and the application means and effects of which also has been presented,it has some characteristics such as material precision and obvious reduce of sample size,and rational advice has been presented.介绍了简单随机抽样和分层随机抽样方法及其在检测中的应用方法和效果。
2.Though stratified random sampling method is adopted for the arterial and collector functional systems,there is a good potential to improve it.尽管分层随机抽样的方法已经在干线和一般的集散系统得到利用,它仍有很大的发展空间。
3.Therefore, the minimum variance and deviation methodology was introduced, based on which, stratified random sampling technology was used for sample design, and thus making an overall assessment more truly on water quality in distributi.为此提出以最小方差和偏差的方法论,采用分层随机抽样技术进行样本设计,从而对管网水质进行较为真实的全面评价,同时对影响管网水质的因素进行分析。
英文短句/例句
1.Proportion allocation in stratified random sampling按比例分层随机抽样
2.timates in stratified random sampling分层随机抽样的比率估计值
3.Multiple Impution for Missing Data in Stratified Random Sampling分层随机抽样条件下缺失数据的多重插补方法
4.Methods The investigated sites were selected by cluster sampling from13 cities.方法在13个市采用整群分层随机抽样的方法选择调查点。
5.the population is divided into strata and a random sample is taken from each stratum.总体分成阶层后由各阶层抽选出来的随机样本。
6.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。
7.Methods Stratified chester random sampling.方法采用分层整群随机抽样的调查方法。
8.random sampling随机抽样,随机采样
9.Stratified Cluster Sampling and Its Application on the Improved RRT Model for Sensitive Question Survey;敏感问题改进的随机应答技术模型分层整群抽样研究及应用
10.Estimation of parameters in stratified cluster sampling on randomized response technique for sensitive question survey敏感问题随机应答技术模型分层整群抽样下参数的估计
11.single random sampling单次随机抽样 单次随机抽样
12.simple random sampling简单随机抽样 简单随机抽样
13.covariance for simple random sampling简单随机抽样协方差
14.precision of simple random sampling简单随机抽样精密度
15.Hierarchical Information Extraction from Research Papers Based on Conditional Random Fields基于条件随机场的科研论文信息分层抽取研究
16.Comparision of Statistics Methods for Analysis of Multistage Clustered Randomized Data;多阶段随机抽样数据统计分析方法比较
17.The Sample Average Approximation Method for the Stochastic Variational Inequality Problem一类随机变分不等式的抽样平均近似方法
18.APPROXIMATION TO THE DISTRIBUTION OF M-ESTIMATES IN RANKED-SET SAMPLING BY RANDOMLY WEIGHTED BOOTSTRAP序集抽样中M估计分布的随机加权逼近
相关短句/例句
Optimum allocation random stratified sampling survey随机分层抽样
3)delaminated random sampling method分层随机抽样法
4)Optimum allocation stratified randomized sampling survey最优分配分层随机抽样
5)stratified random sampling surveys分层随机抽样调查
1.Methods Based on the number of cases with hepatitis B reported by epidemic status network in 2005, the stratified random sampling surveys with different proportion were taken at the beginning of each month according to last month s regional incidence.方法根据2005年疫情网络报告乙肝病例数,每月初按上月地区发病不等比例分层随机抽样调查,调查病例统一填写《天津市乙型病毒性肝炎流行病学调查表》,用Excel软件输机并运用SPSS11。
6)Stratified three-stage PPS random sampling分层三阶段PPS随机抽样
延伸阅读
分层抽样分子式：CAS号：性质：又称分类抽样或类型抽样。将总体划分为若干个同质层，再在各层内随机抽样或机械抽样，分层抽样的特点是将科学分组法与抽样法结合在一起，分组减小了各抽样层变异性的影响，抽样保证了所抽取的样本具有足够的代表性。分层抽样根据在同质层内抽样方式不同，又可分为一般分层抽样和分层比例抽样，一般分层抽样是根据样品变异性大小来确定各层的样本容量，变异性大的层多抽样，变异性小的层少抽样，在事先并不知道样品变异性大小的情况下，通常多采用分层比例抽样。
