Firstly, through the normative description of Fuzzy retrieval model, we define the functional relationship between retrieval efficiency and system efficiency in the retrieval system. Applying the function to the performance analysis of comparison between Fuzzy retrieval system and Boolean retrieval system, we point out the problem of prisoner＇s dilemma which fuzzy retrieval model has to face： the increase of retrieval efficiency brings about the decrease of system efficiency. Secondly, in the view of key-word connection matrix, this article p...
