group sampling meaning in Chinese
分层抽样
分组抽样
Examples
- Abstract : abstract ： using the method described in the paper ， the different group samples are nermalized to obtain reliability data of producs with long lifetime in shorter testing cycles
摘要：摘要：对所选取的不同批样本进行归一化处理后，就可以在较短的试验周期内获得较长寿命剖面上产品的可靠性数据，使可靠性评估工作变得可行，评估结果可信、合理。 - Abstract : to settle the numbers of groups , the moth and features of group sampling are analysed , and its estimator is goven . then using cauchyschwartz unequility , it seeks the best apportion with finite cost
文摘:为了确定分类抽样的各类单位数,分析了分类抽样的抽取方法和特点,同时给出其简单估计,然后利用柯西-施瓦茨不等式推导出在给定调查费用情况下的最优分配 - In this study three scales were used to measure a sample of 802 students selected from 4 middle schools by hierarchical random group sampling , and 766 available copies of scales were adopted to collect data which was processed with spss 10 . 0
本研究采用量表测量法，以分层整群随机抽样法抽取样本。从四所中学随机抽取初中和高中14个自然班共计802人组成样本，有效问卷766份。 - A continuous on - line monitor for volume deformation of cement - based material under multi - environment has been developed , which is designed with the environmental simulation technology , micro - distance measuring technology of laser and eddy current and the transmission agent and then realizes the automatic non - contact monitoring of the deformation of multi - group samples under multi - environment , furthermore , it is suitable to test the early - age deformation of the samples with the moulds self - designed
摘要开发出一种多环境下水泥基材料体积变形在线监测仪，本仪器采用环境模拟技术，激光、电涡流测微技术及传动系统，实现在多环境下，对多组试件进行非接触式变形自动化监测，并利用自行设计的模具，可对试样进行带模测试使其适合早期体积变形测试。