This article introduces the information integration theory to discuss the application of information integration in the network information retrieval system.

The Construction of a New Structure for the Course of Network Information Retrieval;

This paper analyzes the characteristics of network information resource, introduces the methods for retrieving the network information resource and the types and using skills of search engines, and expounds the concrete applications of network information retrieval in competitive intelligence collection in enterprise.

The network information retrieval not merely has a greater impact on library information service,and has impetuses to the development of library information service.

On judgment of "True or False" of periodicals by way of the Internet information retrieval;

This paper discusses relations and influence between attention and internet information retrieval on basis of research on attention and search engine,attention and internet database,attention and relevance of retrieval outcome.

This article discussed the concept and application of thesaurus,from thesaurus to thesaurus network,its application of Web information retrieval system.

In order to help the user to retrieval the useful web information, the, web information retrieval system comes into being.

This thesis discusses the technology of web information retrieval both on theory and application and puts forward a framework for iRobot system.