基于Internet的信息资源发现技术与实现

THE TECHNOLOGY AND IMPLEMENTATION OF RESOURCE DISCOVERY ON INTERNET

Ｉｎｔｅｒｎｅｔ上大量、异质、分布、动态的信息造成了“信息过载”．在信息充斥的情况下，如何有效地为用户提供基于Ｉｎｔｅｒｎｅｔ的资源发现服务已经成为一项重要而迫切的研究课题．搜索引擎部分地解决了资源发现的问题，然而其效果却远不能使人满意．文中首先提出了分布协作式资源发现策略，讨论了资源发现服务中所涉及的几项关键技术，包括：多维文档立方体数据模型、Ｗｅｂ 文档检索、基于Ｚ３９．５０ 的书目检索以及基于Ａｇｅｎｔ的用户接口等，并给出了相应的解决方案．在此基础上，文中构造了一个系统原型ＲＤＳＣＣ。

A mass of heterogeneous, distributed, and dynamic information on Internet has resulted in “information overload”. With the flood of information, it has become an important research issue to provide users with effective service of resource discovery on Internet. Search engines attempt to solve this problem, yet their effect are far from satisfying. In this paper, a distributed cooperative strategy for resource discovery on Internet is firstly presented. Then, several key technologies involved in resource discovery are studied, including data model, Web document retrieval, bibliographic retrieval based on Z39.50, and agent\|based user interface. Finally, a system prototype RDSCC is designed to improve the quality of resource discovery on Internet.