Application of Fuzzy Measure in Information Retrieval Evaluation

The criterion of evaluating an information retrieval system is the ability of how much the system contents the needs of users.Based onthe traditional formula in computing recall and precision,the paper considers the fuzzy property of relevance.We considerate that the retrieval results are fuzzy.In order to measure the fuzzy thing objectively,use fuzzy measure to revise the formula of traditional recall and precision in two ways.One is working at the time that every text has the same effect to the recall and precision,the other is working at the time that every class has the same effect to the recall and precision.These revisions efficiently widen the traditional retrieval evaluation which based on binary relevance.