www网络信息资源检索工具——搜索引擎

介绍了搜索引擎的发展史 ,阐述了搜索引擎工作原理、评价指标和目前所面对的挑战 。

The paper introduces search engine's development history,sets forth its working theory,evaluating indexes and challenges,and compares search engine with traditional information retrieval tools.