学科门户智能搜索引擎的设计与构建——农业史门户搜索引擎的实验

Design and Construction of Intelligent Search Engine based on Subject Portal： the Experiment of Agricultural History Portal＇s Search Engine

面对搜索引擎基于关键词全文检索导致检索准确度低和学科信息门户加工描述只到站点级别的问题，作者提出了将搜索引擎和学科信息门户结合构建智能学科门户搜索引擎的建议——在经过学科专家筛选的、学科信息门户目录中的高质量网站中自动收集网页，形成网页索引，利用自动标引与自动分类方法对收集到的网页进行标引和分类，最后通过分类浏览目录与主题词检索的方式，向用户提供学术资源网页的查找。文章重点介绍了智能学科门户搜索引擎的网页采集、网页自动标引与自动分类及用户接口的设计与实现，并对该搜索引擎存在的问题进行了分析和讨论。

In the face of search engines＇ low search accuracy for full-text search based on keywords, and too simple descriptions of Web sites by subject portals, the author gave the suggestion of constructing intelligent search engine based on subject portal： this intelligent search engine collects Web pages automatically from high-quality web sites of subject portal database that selected by subject specialists to format the web pages index, and then indexing and classifies the collected Web pages using automatic indexes anti automatic classification method, at last, provides the academic Web pages search to user by the method of classification directories and retrieval. This article introduced mainly the design and construction of intelligent search engine based on subject portal, including Web pages collection, Web pages automatic indexing and classification, and user interface. Finally, analyzed and discussed problems of this search engine.