【摘要】 由于P2P系统可以高效地对资源进行共享而受到关注,但现在的P2P仅支持精确查找或者通过洪泛方式进行低效率文本检索。为了解决这个问题,该文提出了一种结构化P2P环境中的文本检索系统,使用LSH函数将高维语义相关的文本向量映射相近的节点上,并解决了由此带来的负载均衡问题。实验结果显示该系统具有很好的查询准确率和负载均衡性能。更多还原

【Abstract】 Peer-to-Peer(P2P) overlays are appealing,since they can aggregate resources of end systems without relying on sophisticated infrastructures. Unfortunately current peer-to-peer systems either offer exact keyword match or provide inefficient text search methods through centralized indexing or flooding. In this paper,a semantic search system is proposed for structured P2P overlays without relying on message flooding. LSH is used to map semantically related text vector to nearly node,and a mechanism is carefully designed to cope with load balancing. Experimental results show that this is a steady system with high recall,good load balance.更多还原