基于描述逻辑的语义P2P网络构架及资源定位  

The Construction and Resource Locating of the Semantic P2P Grid Based on Description Logics

作　　者：卢正鼎[1] 孙小林[1] 李瑞轩[1] 文坤梅[1] 

机构地区：[1]华中科技大学计算机科学与技术学院,武汉430074

出　　处：《计算机科学》2007年第10期33-35,39,共4页Computer Science

基　　金：国家自然科学基金(No:6040327)。

摘　　要：随着网络资源的日益增长,以及人们查询要求的复杂化,如何合理地在P2P网络中分配和查询资源已经变得极为重要。本文计划基于描述逻辑介绍一种应用在语义P2P网络上的算法思想,以期实现资源的概念化分布,使基于语义的查询和检索变得简单。我们的算法采用Chord算法的相容散列思想,将资源的关键字和资源所在节点的IP地址散列为相同的数据类型来进行实例选择。除此之外,每个节点拥有自己的本体系统,并将与其他节点交换CHG来达到知识库的完备。由于在CHG中所有的概念拥有同一个根结点,所以不停地向层次分类的概念树上层节点询问,一定可以找到目标资源的信息。Since the resources increase day by day and the inquiry requests become more and more complicated, how to distributing and querying resources in P2P network in reason has already been extremely important. This paper proposes an algorithm applied in semantic P2P network based on the description logics with the purpose for realizing the concepts distribution of resources, which makes the resources semantic locating easy. With the idea of the consistent hashing in the Chord, our algorithm stores the addresses and resources with the values of the same type to select instance. In addition, each peer has its own ontology, which will be completed by the knowledge distributed over the network during the exchange of CHGs. The hierarchy classification Of concepts allows to find matching resource by querying to the upper level concept because the all concepts described in the CHG have the same root.

关 键 词：语义P2P 描述逻辑 相容散列 本体 CHG 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]