计算机检索基础知识(Basic knowledge of computer retrieval).doc
文本预览下载声明
计算机检索基础知识(Basic knowledge of computer retrieval)
Basic knowledge of computer retrieval
Computer information retrieval service began in the late 50s, with the rapid development of computer technology, communication technology and network technology, computer information retrieval service has become the most important information retrieval service in a way that provide domestic large health information service mode for computer retrieval. Compared with the traditional manual information retrieval, computer information retrieval has the following characteristics:
Retrieval speed: manual retrieval takes several days or even weeks subject, only hours or even minutes of computer retrieval.
In addition, multi classification retrieval approach: manual retrieval tools provide the theme, author searching route, provide access to more ways can, such as the title of.
Update: especially foreign computer retrieval tools, CD monthly update, weekly updates, even for network information update.
Resource sharing: through the network, the user can not be limited by time and space, shared server database.
Retrieval is more flexible and convenient: can match multiple search phrases match search with logic coordination, also can use wildcards, truncate character fuzzy search.
The retrieval result can be directly output: selective printing, disk or E-Mail search results, some can also directly order online text. Some computer retrieval tools can even directly retrieve the full text.
In the understanding of computer information retrieval service knowledge, should first understand the relevant knowledge of computer information retrieval.
A 1. computer information retrieval system
Computer information retrieval system from the physical structure, including computer hardware, software and database, communication lines and retrieve terminal five parts. Generally speaking, information retrieval system by computer software developers, hardware and communication lines, as long as the computer ret
显示全部