提高文献查全率和查准率的有效途径——逻辑运算符、位置算符和通配符的灵活运用

逻辑运算符、位置算符和通配符是文献检索中经常使用的检索手段,本文首先概述了它们的使用原理,然后详细介绍了在几个常用数据库中的使用技巧,最后通过具体实例解析了在数据库中的应用,以便为广大的科技工作者和情报检索人员提供有益的参考。

Logical operator, proximity operator and wildcard character are often used in document retrieval.This paper first introduces their principal breifly, and then introdues in details their useful skills in several often used database, at last introduces their application by some examples. It is a good reference for science researcher and intelligence agent.