| With the development of science of computer and Internet technology, Internet clients and resources are increasing times by times. It is very necessary for clients to have effective stems when they are searching information on the Internet. Therefore, searching engines are designed for solving this problem. It is used for a guide as follows in the processes of searching information: discovering and collecting, understanding, picking-up, organizing, dealing with and index serving.This article mainly introduces the theory and technology related to the searching engine, and describes the designing and realizing of Chinese searching engine in our campus. This thesis focuses on the theory and structure analysis of clients'index and realization of the process as follow:1. This article introduces history and development of the searching engine, and analysis of the principle of the searching engine and searching models, and generally introduces implementation of the searching engine.This article introduced the full-text search engine principle of work and the table of contents index search engine principle of work .Full-text search engine from website extraction information establishment homepage database. The search engine automatic information collection function is divided two kinds . One kind is the regular search . Once in a while,the search engine sends out"the spider"on own initiative the procedure. Carries on the retrieval to in certain IP address range interconnection website,once discovers the new website. Another kind submits the website search ,namely the website owner on own initiative submits the website website to the search engine that the website owner on own initiative submits the website to the search engine, It (does not wait for the direction detection in certain time 2 days to several months) to send out"the spider"to yours website the procedure.This article introduced search model, from appearing of the search engine, The various countries researcher proposed very many models, But overall speaking mainly divides into following several kinds: Table of contents type search engine, Based on robot search engine, Client-based search engine, Meta-search engine, distributed search engine. |
