基于链接的方法进行Web信息检索的TREC实验研究

本文通过TREC实验研究基于链接信息的检索对Web信息检索的影响,包括使用链接描述文本,链接结构以及将基于链接的方法和传统基于内容检索的方法合并。得到如下结论:首先,链接描述文档对网页主题的概括有高度的精确性,但是对网页内容的描述有极大的不完全性;其次,与传统检索方法相比,使用链接文本在网页定位的任务上能够使系统性能提高96% ,但是在信息查询任务上没有帮助;最后,将基于链 接信息的检索与传统的基于内容检索技术合并,在网页入口定位任务上总能将系统性能提高48%到124.8% ,而对特定信息查询任务也能在一定程度上改善检索效果。

Study on Link-based Approaches for Web IR in TREC Experiments

This paper studied the effects of using of link information for Web IR in TREC experiment,including link anchor text,link structure and the combination of link-based retrieval and traditional content-based retrieval.Several conclusions are drawn:Firstly,anchor text can represent precisely the topic of Web page,but insufficient in describing the Web page content.Secondly,comparing with traditional content-based IR technique,using link-based approach on homepage finding task can get more than 96% improvement,while it is not helpful on ad hoc task.Finally,combining link-based and content-based techniques makes consistent 48% to 124.8% improvement on homepage finding task and some progress on ad hoc task.