关键词： 软件维护   信息检索   程序理解   自动提取方法   程序源代码   中文文档   关联信息   信息检索技术   工程活动   需求跟踪  

摘要： 维护代码和对应的文档的关联在软件维护、程序理解、需求跟踪等软件工程活动中有重要的意义。维护这些关联其关键在于提取关联信息,提出了一种利用信息检索技术自动提取程序源代码和中文文档关联信息的方法。首先通过提取文档中的词汇建立文档的语言概率模型,在此基础上用由代码信息组成的检索项检索文档集,由此得到代码和文档的相关列表和关联矩阵。测试结果表明在提取项大于5时即可获得95%以上的关联。

关键词： Defect reports   Requirements   Tracing   Information retrieval   Requirements tracing   Requirements traceability matrix (RTM)  

摘要： To support debugging, maintenance, verification and validation (V&V) and/ or independent V&V (IV&V), it is necessary to understand the relationship between defect reports and their related artifacts. For example, one cannot correct a code-related defect report without being able to find the code that is affected. Information retrieval (IR) techniques have been used effectively to trace textual artifacts to each other. This has generally been applied to the problem of dynamically generating a trace between artifacts in the software document hierarchy after the fact (after development has proceeded to at least the next lifecycle phase). The same techniques can also be used to trace textual artifacts of the software engineering lifecycle to defect reports. We have applied the term frequency-inverse document frequency (TFIDF) technique with relevance feedback, as implemented in our requirements tracing on-target(RETRO) tool, to the problem of tracing textual requirement elements to related textual defect reports. We have evaluated the technique using a dataset for a NASA scientific instrument. We found that recall of over 85% and precision of 69%, and recall of 70% and precision of 99% could be achieved, respectively, on two subsets of the dataset.

ISBN: (纸本)7313041640

关键词： information-retrieval   computerised practice guidelines   databases   electronic resources   information services   information systems  

摘要： Purpose: This paper appraises empirical studies examining the impact of clinical information-retrieval technology on physicians and medical students. Methods: The world literature was reviewed up to February 2004. Two reviewers independently identified studies by scrutinising 3368 and 3249 references from bibliographic databases. Additional studies were retrieved by hand searches, and by searching ISI Web of Science for citations of articles. Six hundred and five paper-based articles were assessed for relevance. Of those, 40 (6.6%) were independently appraised by two reviewers for relevance and methodological quality. These articles were quantitative, qualitative or of mixed methods, and 26 (4.3%) were retained for further analysis. For each retained article, two teams used content analysis to review extracted textual material (quantitative results and qualitative findings). Results: Observational studies suggest that nearly one-third of searches using information-retrieval technology may have a positive impact on physicians. Two experimental and three laboratory studies do not reach consensus in support of a greater impact of this technology compared with other sources of information, notably printed educational material. Clinical information-retrieval technology may affect physicians, and further research is needed to examine its impact in everyday practice. (c) 2005 Elsevier Ireland Ltd. All rights reserved.

关键词： 情报检索  

关键词： Semantic Web   ontologies   RDF   OWL   semantic search   semantic association  

摘要： Although various ontologies and knowledge sources have been developed in recent years to facilitate biomedical research, it is difficult to assimilate information from multiple knowledge sources. To enable researchers to easily gain understanding of a biomedical concept, a biomedical Semantic Web that seamlessly integrates knowledge from biomedical ontologies, publications and patents would be very helpful. In this paper, current research efforts in representing biomedical knowledge in Semantic Web languages are surveyed. Techniques are presented for information retrieval and knowledge discovery from the Semantic Web that extend traditional keyword search and database querying techniques. Finally, some of the challenges that have to be addressed to make the vision of a biomedical Semantic Web a reality are discussed.

关键词： JXTA   搜索技术   CMS   Internet   Management   Metadata   Service   信息检索技术   海量信息   指数形式   应用程序   网络平台   管理服务   对等网   开放式   P2P   实时化   分布式   文件   下载   共享  

摘要： 传统的信息检索技术已经无法容纳Intemet上以指数形式增长的海量信息,P2P(Peer-to=Peer,对等网)应用程序采用了新的技术来检索Intemet上的文件和信息.JXTA是一个用来解决P2P计算的开放式网络平台,JXTA内容管理服务(Content Management Service,CMS)采用了一种实时化的方法来搜索自己想要的资源,以便对等节点(Peer)共享和下载内容.本文介绍CMS的简单搜索和基于Metadata的搜索技术,并着重研究CMS分布式搜索技术.

关键词： 数字图书馆   信息检索技术   评价因素  

摘要： 阐述了基于内容的信息检索技术(包括文本信息检索、图像信息检索、音频信息检索、视频信息检索),简述了评价基于内容的信息检索系统的因素。

关键词： 信息检索   新技术   知识挖掘   数据库技术  

摘要： 互联网的迅速发展和数据库技术的不断创新,正改变着传统的信息检索技术。本文对信息检索领域的一些新技术进行了介绍,对各种技术的运用现状和存在的优缺点作了描述和分析。

关键词： 可视化技术   网络信息检索   WIDAS   网络信息资源   信息过滤  

摘要： 分析了传统信息检索系统的不足及可视化信息检索的优势,介绍了一种将信息检索与信息可视化集成,用于网络信息资源可视化检索的新工具—WIDAS,并与其它几个可视化检索系统进行了比较和评价,对信息检索可视化的发展及前景作了讨论。