P2P系统中基于Web的索引信息扩展算法的研究  

Algorithm of Web based index expansion in P2P systems

作　　者：尤佳莉[1] 王劲林[1] 

机构地区：[1]中国科学院声学研究所

出　　处：《计算机工程与应用》2008年第18期6-8,24,共4页Computer Engineering and Applications

基　　金：中国下一代互联网示范工程(Supported by China Next Generation Internet Foundations(CNGI)No.CNGI- 04-15-2A);国家高技术研究发展计划(863)(the National High- Tech Research and Development Plan of China under Grant No.2005AA1032)

摘　　要：基于环球网(Web)的特点和用户在点对点(P2P)系统中搜索的习惯,提出了一个在P2P系统中对媒体文件自动生成索引的方法。该方法有效地解决了媒体文件描述符不足所带来的查询精度低的问题。同时,提出了一个在P2P系统中节点信息的更新策略。实验表明,描述符扩展后,媒体文件查询结果的准确率得到了显著的提高。Based on the characters of Web and Peer-to-Peer（P2P） systems,an algorithm of auto-generating index of media files for P2P systems from Web is proposed.This method can efficiently solve the problem about lack of descriptors of media files, which causes the low recall and precision in key words searching.Besides,to satisfy the increasing information of Web and the changing popularities of people,an auto-updating strategy for peers is applied.From the experiments,it shows that this method can expand the describing information for media files and significantly improve the searching capacity of P2P systems.

关 键 词：点对点 环球网 索引 查询 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]