The Design Of A New Kind Of Search Engine Based On DRIS Theory

This thesis discusses the contradiction between the information exploding and the inefficiency of information retrieval of Internet users. The origin of this contradiction is also investigated. For this reason, the solutions based on the new architecture are introduced. We give the detailed discussion for DRIS (Domain Resource Integration System) theory, which is just one of representative solutions.The DRIS theory is briefly introduced first. DRIS implies the layered distributed Internet information management pattern. Then based on this theory, we design a novel Internet search engine. This research includes the design of different components of search engine and their supporting theory. The programs for the bottom layers system are also introduced. Especially, the layered architecture of this system and the cooperation of different layer nodes are detailed, which represents the main difference with the current search engines. This new search engine could give the more precise results in one Domain. Its update interval and converge have also excellent effect. These are just the proof of the advantage of this new system.Many new problems arise in the construction and development of digital library. Some of representations are unfixed formats of different kinds of resources and the interoperability problem resulting from different interfaces of databases. Aiming at these problems, we detail the methods and theories to integrate these digital resources. As the extension of research, the information integrated retrieval system including the digital books, journals, etc are also described. Moreover, how to realize the united search between the self-built databases and purchased databases is also discussed. It gives a reference to integrate different kinds of information resources in the construction of digital library.