从检索实例看查全率与查准率之间的关系

Relationship between Recall and Precision Ratio in Terms of Retrieval Example

有关查全率与查准率关系的研究与争论 ,从 2 0世纪 6 0年代一直延续至今 ,还未得出统一的结论。原因之一就是没有令人信服的检索实例。本文试图从一些检索实例揭示查全率与查准率之间的具体关系。从本文的检索实例可以看出 ,查全率与查准率之间不仅可以存在互逆关系 ,也可存在互顺关系和其他关系。

With regard to the relationship between recall and precision ratio,there is no unanimous conclusion from 1960's up to now.One of the reasons in that there is no convincing retrieval example.This paper attempts to reveal the concrete relationship between them by means of retrieval examples.It shows that there is not only the inverse relationship,but also the direct and other relationship between them.