“πPS抽样”的概念、定义、翻译、参考文献-科学参考

单词	πPS抽样
释义	πPS抽样 Encyclopedia 理学数据收集模式释 πPS samplingπPS抽样一种样本量固定，且每个单元的包含概率与其规模成比例的不放回不等概抽样。
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