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文献检索的目的是全面、准确地为用户提供所需文献。但是,从用户角度来看,在检出的文献中可能会夹杂着一些不符合提问要求的文献(即误检文献);反之,在未检出的文献中也可能存在着少量符合提问要求的文献(即漏检文献)。由于用户的看法和需要不同,对检出文献是否满足要求的相关性(即实用性)评价也可能不同。因此,文献的相关性评价在某种程度上带有主观性。尽管如此。仍可作为评价文献检索效率的基础。所谓检索效率简单地说,是指检索系统提供
The purpose of literature search is to provide the users with the necessary documents comprehensively and accurately. However, from the user's point of view, there may be some documents that do not meet the query requirements (ie, false positives) in the detected documents. Conversely, there may be a small number of documents that do not meet the query requirements Literature (ie missing documents). Due to the different opinions and needs of the users, the relevance (ie practicability) of the documents found to meet the requirements may not be the same. Therefore, the relevance of the literature is somewhat subjective. despite this. Can still be used as a basis for evaluating the efficiency of document retrieval. The so-called search efficiency simply means that the search system provides