关键词： 医学-情报检验  

ISBN: (纸本)7505826344

关键词： 光盘   计算机   全文信息检索系统   编辑出版系统   工程建设标准   技术标准   机器检索   标准规范   信息储存   起草人   字段   数据库   数据库系统  

摘要： 现代信息技术是当今世界高新技术的主导和灵魂,信息的搜集、加工、储存和发布是计算机网络得以发展的源泉。光盘以体积小、质量轻、容量大、易保存、高保真、寿命长等特点成为信息储存的新兴煤体。以光盘为载体的电子图书成为一个非常庞大而具有魅力的市场,对于专业性、知识性比较强、文字信息量比较大的标准规范文档,实现快速便捷的查询和处理功能就显得十分重要。发达国家如美国、英国、澳大利亚、德国等都建立了相应的标准信息检索系统,将标准全文信息制作成光盘,或放到国际互联网上供用户进行查询,极大地方便了标准的使用者和管理者。我国在工程建设标准化工作中,应用计算机建立各种信息系统是近几年的事情,起步比发达国家晚。目前,大多是用计算机来进行标准目录的管理,或是根据标准的特征信息如名称、编号、主编单位等来进行标准规范内容的查询。这些信息系统在标准化管理过程中起到了良好的作用,但对标准的执行人员却无多大用处。在这种情况下,如何提高工程建设标准方面的

关键词： 多媒体信息   信息检索   关键技术   信息模型  

关键词： Internet   搜索引擎   中文信息检索   主题检索   分类检索  

摘要： 本文主要介绍了INTERNET中文搜索引擎索引数据库建设中的分词技术、文档的相关性等技术特点；中文搜索引擎的系统结构；网上中文信息检索方法。并提出了中文搜索引擎存在的检索方式单一、缺少全文引擎等问题。

关键词： 文献检索课   计算机信息检索   网络资源利用  

摘要： 在知识经济时代 ,传统的文献检索课已不能适应新形势的要求。计算机信息检索与网络资源利用才是文献检索课改革的方向与思路。

ISBN: (纸本)7504629774

关键词： Bibliometrics   Information Retrieval   Information Seeking   Information Systems   Internet   Online Searching   Search Strategies   User Needs (Information)   World Wide WebQuery Processing  

摘要： The aim of this article is to test whether the results obtained from a specific bibliographic research can be applied to a real search environment and enhance the level of utility of an information retrieval session for all levels of end users. In this respect, a Web-based Bibliometric Information Retrieval System (BIRS) has been designed and created, with facilities to assist the end users to get better understanding of their search domain, formulate and expand their search queries, and visualize the bibliographic research results. There are three specific features in the system design of the BIRS: the information visualization feature of the BIRS (cocitation maps) to guide the end users to identify the important research groups and capture the detailed information about the intellectual structure of the search domain;the multilevel browsing feature to allow the end users to go to different levels of interesting topics;and the common user interface feature to enable the end users to search all kinds of databases regardless of different searching systems, different working platforms, different database producer and supplier, such as different Web search engines, different library OPACs, or different on-line databases, A preliminary user evaluation study of BIRS revealed that users generally found it easy to form and expand their queries, and that BIRS helped them acquire useful background information about the search domain. They also pointed out aspects of information visualization, multilevel browsing, and common user interface as novel characteristics exhibited by BIRS.

关键词： 因特网   医学文献   信息检索   电子期刊   搜索引擎  

摘要： 介绍了利用因特网上的信息资源和查询医学信息的方法及途径 ,并重点对Yahoo ,MEDLINE ,中文网站 ,电子期刊 ,搜索引擎作了介绍。

关键词： Classification   Computer Software Development   Computer System Design   Expert Systems   Information Processing   Information Retrieval   Online SystemsText Classification  

摘要： The Protein Annotators' Assistant (or PAA) (http://***/paa/) is a software system which assists protein annotators in the task of assigning functions to newly sequenced proteins. Working backward from SwissProt, a database which describes known proteins, and a prior sequence similarity search that returns a list of known proteins similar to a query, PAA suggests keywords and phrases which may describe functions performed by the query. In a preprocessing step, a database is built from the protein names that appear in the SwissProt database, and against each protein are listed key words and phrases that are extracted from the corresponding text records. Common words either in general English usage or from the biological domain are removed as the phrases are assembled, This process is assisted by the use of a simple stemming algorithm, which extends the list of stop-words (i.e., reject words), together with a list of accept-words. At runtime, the search algorithm, invoked by a user via a Web interface, takes a list of protein names and clusters the named proteins around keywords/phrases shared by members of the list. The assumption is that if these proteins have a particular keyword/phrase in common, and they are related to a query protein, then the keyword/phrase may also describe the query. Overall, PAA employs a number of in techniques in a novel setting and is thus related to text categorization, where multiple categories may be suggested, except that in this case none of the categories are specified in advance.