【作者】 谢鸣；

【导师】 姜建国； 蒋红；

【作者基本信息】 西安电子科技大学 ， 计算机技术， 2009， 硕士

【摘要】 随着互联网的高速发展,各种网络文献数据库层出不穷,为用户带来了极大的方便。但与此同时,用户为了检索到相关信息,必须不停地从一个数据库跨越到另一个数据库,这就可能涉及到包含期刊、专利、标准、会议、学位论文或者书目在内的众多数据库,由于每个数据库都有着不同的处理对象、操作方法和专用客户端检索系统,对于文献知识相对缺乏的普通用户而言,造成的不便是显而易见的。因此,用户越来越希望得到更加方便快捷、信息更加丰富的“一站式”统一检索系统来满足用户的迫切要求,这是提高服务质量和领域的手段,也是数字化科技文献中心的标志。本文首先研究了统一检索系统涉及到的元数据、标准化检索协议、HTTP协议,接着对比分析元数据和中间件的整合模式,最后在.NET环境下,采用WEB检索代理技术和XML页面分析技术开发完成科技文献统一检索系统。该系统全面整合省内科研机构、院校常用的文献数据库及互联网信息等异构数据资源,如万方、维普、超星、书生、方正、CNKI等,在WEB方式下为用户提供统一身份认证与登录入口的全文信息检索服务系统,使用户同时对多个异构数据库进行并发检索,并将多个库检索结果以统一的格式显示。为那些需要访问多个数据库进行检索的用户提供了极大的便利,避免了需要逐个登录数据库、输入检索条件的麻烦,使用方便、快捷,为用户提供“一站式”网络信息服务。实践证明,本论文开发的跨库统一检索系统将各个异构数据资源的位置、接口等细节屏蔽,提高了查全率和查准率,具有良好的稳定性、网络环境适应性和易维护性等特点。更多还原

【Abstract】 With rapid development of Internet, there are variety of endless network Literature Databases, which has brought users great convenience. At the same time, the user who want to find the relevant information must be kept across from a database to another database, This is involved to journals, patents, standards, conferences, dissertations, bibliography, and so on numerous databases. Because every database has different dealing object, operating method and special client indexing system, to the ordinary users of being relative short of philological knowledge, the caused inconvenience is obvious. Therefore, more and more useres want a unified Indexing system with one-staion style to get faster and more convenient, with more information to meet their imminent requests, There is way of improving the quality and scope of such services, and also making a sign of digital technological documentation center.First, this article has worked over the unified indexing system including metadata, standardized search protocol, HTTP protocol, and comparative analysis between metadata and middleware integration model, finally at.NET environment, by using of WEB indexing proxy technique and XML web page analysis technique, we developed the Science and Tech. Literature.The system has fully integrated data resources of provincial scientific institutions, commonly used bibliographic database of institutions and Internet heterogeneous information, Such as Wang fang, VIP, Superstar, BooX, Founder, CNKI and so on, in WEB style to provide users a unified identity authentication and login-in access to the full text information of Indexing service system, which enables users to carry out multiple concurrent heterogeneous database researching at the same time, and displays a number of database search results to unified format. For those who need to access multiple databases, the system provides great convenience, also avoid trivia of signing in the databases respectively, which gives you an one-station network information service with easy use, quick solution and convenience.Practice has shown that the developed unified Indexing system could be able to shield the position of isomeric data resources and interface port, which improved the recall rate and precision, simultaneously supplied with good stability, adaptability under network environment and easy-maintenance features.更多还原