... number items in sample : 抽样调查项目数 multi-stage survey : 多阶调查 multi-purpose survey : 多目的调查 ...
基于1个网页-相关网页
Methods. The survey was conducted according to multi-stage stratified cluster sampling method.
方法：分阶段分层整群随机抽样调查。
After a lot of survey and careful design work, a one-dimensional test system with multi-function such as air stage and fuel reburning is built up.
本文经过大量的调研和仔细的设计、完善，建成了具有空气分级、燃料再燃等多种用途的一维热态试验系统。
RESEARCH METHODThe stratified multi-stage cluster random sampling method was used in the survey.
研究方法本研究采用分层整群随机抽样方法进行抽样。
应用推荐