分组抽样方法是最常用的，因为在紧急情况的初期，人们很少住在有组织的环境中。
The cluster sample method is most often used because, in the initial stages of emergencies, people are rarely living in a structured pattern.
分组抽样，即测量随机的家庭“组”，一般用于不均匀地分散在较大面积地理区域的人群。
Cluster sampling, in which random "clusters" of households are measured, is used in populations that are not in even or structured Settings but are spread unevenly over a large geographic area.
从所有的区域和它们的估计人口列表中得到总分组数，再将总分组数除以30得到分组抽样间隔k。
The total number of clusters, drawn from a list of all sections and their population estimates, is divided by 30 to obtain the cluster interval K.
方法：将医用皱纹纸与棉布包装物品分组，随机抽样进行细菌培养，并同时进行成本、性能比较。
Methods:The articles packed with medical ripple paper and full cotton were divided into two groups, then cultivated bacterial of the articles by random sampling.
方法抽样调查，分组对比，多因素统计分析。
Methods Sampling interview, grouping comparison and multi factors statistical analysis are adopted.
该算法主要由栅格形状，图搜索，局部规划器，栅格分解，栅格抽样等部分组成。
The algorithm consists of Cell Shape, Graph Search, Local Path Planning, Cell Splitting, Probabilistic Sampling.
设计：分层抽样，随机分组对照，量效分析。
DESIGN: Grade sampling, randomized controlled quantitative analysis.
设计：分层抽样，随机分组对照，量效分析。
DESIGN: Grade sampling, randomized controlled quantitative analysis.
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