In order to help the user to retrieval the useful web information, the, web information retrieval system comes into being.
为了帮助用户检索和获得网络上的丰富信息，网络信息检索系统应运而生。
This article discussed the concept and application of thesaurus, from thesaurus to thesaurus network, its application of Web information retrieval system.
本文探讨了叙词表的概念与应用特点；从叙词表到叙词网络；叙词表在网络信息检索系统中的应用。
Therefore, a research on the standard system of heterogeneous information retrieval under the web environment becomes an important topic of current information retrieval area.
因此研究网络环境下，异构信息检索的标准体系成为当前信息检索领域的一个研究热点。
The paper provides some improving measures, and gives a model of active pushing system based on vector space model, which can better improve the efficiency of Web information retrieval.
本文提出了一系列优化措施，设计了一个基于向量空间模型的主动推送系统原型，更好的满足网上信息检索效率的提高。
Extraction of Web Information System filters the retrieval results according to user model and meets user personalized need with raising the accuracy and recall ratios.
实验结果表明，基于此兴趣模型的网络信息提取系统能对检索结果做出个性化过滤处理，提高用户的查准率和查全率，满足用户的个性化需求。
Focused crawler is a subject-oriented information retrieval system. It can meet the users' need and retrieve information that is relevant to some specific subjects from the web automatically.
聚焦爬虫是一种面向主题的信息搜集系统，可以根据用户需要从互联网上自动搜集到主题相关信息，在主题搜索引擎、站点结构分析等方面取得越来越广泛的应用。
The paper analyses the important changes of web information retrieval languages and the impact of Internet on them and discusses their system structure and terms.
本文分析了在网络平台中情报检索语言发生的重要变化，以及网络环境对检索语言的影响，最后讨论了检索语言的体系结构与词汇问题。
The paper analyses the important changes of web information retrieval languages and the impact of Internet on them and discusses their system structure and terms.
本文分析了在网络平台中情报检索语言发生的重要变化，以及网络环境对检索语言的影响，最后讨论了检索语言的体系结构与词汇问题。
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