关键词： 机械工程-信息检索-高等学校-教材  

关键词： 应用   机器智能   技术设计  

关键词： 电气工程-信息检索与利用   电子工程-信息检索与利用  

关键词： 倒排文件   受控   信息检索系统   计算机   字段   变长记录   检索项   发展趋向  

摘要： 当今,世界正值新技术革命的浪潮之中,实质上就是一场信息革命。谁能最先把握住新概念、新工艺、新理论、新技术,最快地用于生产实践,制造出优异性能的新产品,谁就能在竞争中获胜。 在生产和商业企业的管理中,物流是商业经营管理活动中的主体,企业的一切活动均需

关键词： 信息检索系统   读者   图象   情报技术   电视画面   英国邮政局   电视机   电视接收机   印刷品   出版者   电话线路   电话设备  

摘要： 电视信息检索系统(Videotext; Videotex; Viewdata; Teletext)是七十年代才出现的一类新型信息检索服务的总称.它将电视广播系统、电话和计算机系统结合为一体.在这种新的信息检索系统中,数据、图象和文章以电子脉冲的形式存贮,用按键方式将它们在几秒钟内传播出去,然后以电视画面的形式显示在干百万个办公室和家庭的电视屏幕上.人们又称这种系统为"视频数据检索系统"或"电视文献".一、电视信息检索系统的基本形式及发展概况电视信息检索系统有两种基本形式.第

关键词： Cardiology   Computers   Information Services   MEDLARS   Societies, Medical   Thoracic Surgery   United States  

摘要： An ad hoc committee of the MCA, formed in 1971 to make a comprehensive survey of the needs of the chemical industry in patent information retrieval services, included among its recommendations a standing committee of the MCA on patent information retrieval. The Technical Information Retrieval Committee of the MCA was started in 1972 with representatives from 35 member companies. Subcommittees of the TIRC were appointed and serve as contacts with organizations providing information services in the patent and technical literature fields of interest to the chemical industry. These subcommittees‘ activities include consultations, as requested;suggestions for new products and recommendations on proposed products;surveys within the industry to aid in planning new patent services;analysis of the quality of the services;and seminars for users to aid in their understanding and use of the services. The work of the TIRC has been helpful to the chemical industry in obtaining needed information services and improvement of existing services and in informing marketers of patent information of the needs of the industry. © 1978, American Chemical Society. All rights reserved.

摘要： The introduction of powerful, low-cost computers now make it possible for most organizations to perform sdi and retrospective searching. The use of such a machine, located at the new england research application center (nerac) was reported earlier. Ne improvements to nerac's sdi chemical search system are now discussed.

关键词： Abstracts   Indexing   Societies   Joints   Companies   Materials  

摘要： The author suggests that with the large volumes of information available, our conventional indexing tools are already overloaded and that we are in danger of becoming information retrieval limited. Centralised repositories and better communications are discussed as one solution to this problem.

摘要： The Information Center at the University of Georgia (UGA) has taken a multipronged approach to educating its users in the use of computer-based information retrieval services. For campus users, both seminars in the academic departments and personal interviews and discussions are used. A series of classroom lectures, augmented by practical exercises, has been initiated in conjunction with the chemical literature class. Workshops, which provide in-depth training on profile coding techniques and analysis and use of search results, are offered several times each year. An on-line, interactive search system, used to augment all of the above methods, is available for use from a CRT console for representative subsets of various data base files. © 1971, American Chemical Society. All rights reserved.