基于网页主题重要性的专题搜索策略研究  

The Research on Focused Search Strategy Based on Topical Importance

作　　者：魏本洁[1] 董守斌[1] 

机构地区：[1]华南理工大学计算机科学与工程学院广东省计算机网络重点实验室,广州广东510640

出　　处：《江西师范大学学报（自然科学版）》2008年第2期162-165,共4页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：863计划(2006AA01Z196)资助项目

摘　　要：网页之间的链接结构为评价网页的主题重要性提供了丰富的信息,但传统的基于链接结构评价的主题排序算法,虽然提出了用向量来表示网页在不同主题中的重要程度,但它们在计算过程中没有充分考虑网页本身的主题相关度.为解决这一问题,本文提出根据链接上下文信息得到主题相关度预测,并将其融合到主题重要性的计算中.同时,根据网页的主题重要性排序,来指导专题爬行器的爬行方向.实验结果表明,基于网页主题重要性的排序测度TopicalRank比PageRank、TSPR(Topical-Sensitive PageRank)对专题爬行更有指导意义.Link structure between pages provides rich information for evaluating the importance of pages. The traditional focused search strategy based on link structure suggested using a score vector for each page to express the importance of different topics, but the topical relevance of a page isn＇t taken into account. To solve this problem, we suggest calculating topical relevance prediction according to link context and integrating it into the calculation of the topical importance. In addition, the topical importance rank of the page was used to guide focused crawling. According to the experimental resuits, it is more significant for TopicalRank to guide focused crawling than PageRank and TSPR.

关 键 词：链接结构 链接上下文 标签树 主题重要性 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]