This paper proposes an approach based on query expansion and node aggregation under the unstructured peer-to-peer network. This approach can find the relationships of keywords and nodes automatically, then it records the information on each local node and updates its knowledge base continuously. In the future retrieval, the purpose of keywords relationship is to increase hit goals，and the purpose of similar nodes aggregation is to decrease the search scope. Simulation experiment results prove that this approach has high search hit rate and accuracy.
杨静,王亚民. 基于查询扩展和节点聚合的P2P搜索方法[J]. 现代图书情报技术, 2009, (9): 51-56.
Yang Jing,Wang Yamin. P2P Search Approach Based on Query Expansion and Node Aggregation. New Technology of Library and Information Service, 2009, (9): 51-56.
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