In this paper, we given an approach for optimum design of sample sire in two-phase sampling for PPS, and discussed an example.
该文讨论了为PPS抽样的二相抽样时，其样本单位数的最优设计问题。并结合实例进行了分析。
Based on uniform design and the cluster theory, a optimum selecting method of sample is proposed to solve the problem of sample selection.
结合均匀设计和聚类思想提出的样本优选方法，在一定程度上解决了神经网络样本选择的问题。
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