【摘要】 相关性测量是信息检索的关键。人们提出了一系列信息检索模型以从理论与实践的角度给予解答。本文以发展的眼光探讨了各种信息检索模型的理论、特性和应用 ,试图从模型应用的角度建立一套用于网络环境下的信息检索模型比较和评估指标体系。更多还原

【Abstract】 The measurement of relativity is the key to information retrieval.A series of information retrieval models has been put forward to give answers in theory and practice.In this article,the theories,properties and applications of all kinds of information retrieval models are discussed from the point of view of development.And the authors attempt to establish a set of comparing and evaluating index system to be used in the network environment for the application of these models.更多还原