作者通过数学推导,指出参考文献[2]中的不妥之处,分析了查全率R和查准率P的相互关系,简要讨论了R—P“纯”互逆相关曲线的形状。据此,对检索系统设计和检索过程中得到满意检索效率的途径进行了讨论,并认为R—P关系的数量规律关键在于弄清误检数b与检准数a之间的统计关系。 Through mathematical derivation, the author pointed out the defects in Reference [2], analyzed the relationship between recall ratio R and precision P, and briefly discussed the shape of the “pure” reciprocal correlation curve of R-P. Based on this, we discuss the ways to obtain satisfactory retrieval efficiency in the process of the design and retrieval of the retrieval system. The key point of the quantitative law of R-P relationship is to find out the statistical relationship between the number of false positives b and the number a.