摘要
本文阐述了ＱＳＡＲ研究中常用的几个电子参数σ的定义、测试方法及估算方法，对可利用数据进行了归纳整理，并通过实例阐述了其在ＱＳＡＲ中的重要作用。
In this paper,the definition,measuring method and estimating method about several electronic parameters σ usually used in QSAR are expounded,some available data are summed up and sorted out ,and their important application in QSAR is also expounded by examples.
