基于对等网络的全文信息检索  

P2P Full Text Information Retrieval Based on Centroid Method

作　　者：程学旗[1] 吕建明[1] 周昭涛[1] 

机构地区：[1]中国科学院计算技术研究所软件研究室,北京100080

出　　处：《计算机研究与发展》2004年第12期2148-2155,共8页Journal of Computer Research and Development

基　　金：国防预研基金项目(51415070304ZK1101)

摘　　要：基于P2P方式的信息检索系统相对集中式信息检索系统具有成本低、可扩展性好、容错性强等优点 ,可充分挖掘网络边缘资源 ,并可提供个性化的信息服务 然而如何在纯P2P环境下实现全文检索并定位目标资源是困难的 当前 ,采用广播查询的非结构化P2P(如Gnutella)和采用分布式Hash表方式的结构化P2P(如CAN)都不能直接实现全文检索 针对这个问题 ,提出了基于质心法的结构化P2P全文检索方法 ,并建立模拟程序 ,对检索的性能与效果做了初步的验证Instead of a centralized information system, a peer-to-peer(P2P) full text information retrieval system is more scalable, cost effective and fault tolerant.It can cover the information at the edge of network and is more suitable for personalized resources services.However, P2P full text search is a very challenging problem, and the traditional broadcast ways are quite ineffective.Unstructured P2P information sharing systems (such as Gnutella, KaZaA) and structured P2P system can not support direct full text information retrieval.In this paper, a P2P full text information retrieval system is presented based on centroid method.A simulation program is created and the performance of the system is tested.Experimental results show that this is a steady system with high recall, good load balance and low resource usage.

关 键 词：对等网络 全文信息检索 质心法 路由 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]