The distribution and quantity of Felis lynx population in the northeast have been found out by the three-stagesampling method.
我们利用三阶抽样法,查清了东北地区猞猁种群的分布及数量情况。
2
The paper presents a typical self-weighting sample design for the stratified three-stage or over sampling.
本文提出了分层三阶段及以上抽样的自加权抽样设计方法。
3
A balanced three-layer sample rotation pattern is presented in this paper to solve the problem of rotation for the quarterly surveys with three-stagesampling designs.