... 等级群体因素说 hierarchical group factor theory 分级群 grading group 年级群 age group ...
基于2个网页-相关网页
短语
分级群聚
[计]
hierarchical clustering
分层单级整群抽样
stratified one-stage cluster sampling
分级复接群
[通信]
grading group
植物群落分级
Class of formations
多级群分复用
multilevel-grouped-multiplexing
分层一级整群抽样
stratified one stage cluster sampling
分层多级整群抽样
stratified multi-stage cluster sampling