利用全息技术构建图书馆数字资源新的存储平台     

刘普 《现代情报》2006,26(4):93-95

存储技术和存储设备的建设是构造现代化数字图书馆的基础组成部分。全息存储是一种利用激光干涉原理将图文等信息记录在感光介质上的大容量信息存储技术，它可以在不改变激光波长的情况下，极大的提高存储密度。随着仝息存储技术和相关标准的不断发展和完善，这种存储解决方案将会给图书馆存储基础设施的建设带来极大的益处。  相似文献   

浅析现代信息机构信息资源建设与开发利用   总被引：2，自引：1，他引：2  

刘小琳 《现代情报》2006,26(7):70-72,75

阐述新时期现代信息机构，信息资源建设的主要步骤、内容，重点介绍信息资源建设所采取的方式和方法，并进一步探讨信息资源的二次开发以及信息资源服务方式的开拓等问题。  相似文献   

英国国防科技信息管理体制和保障体系研究     

汤珊红  曹宽增  秦利  周慧贞 《情报理论与实践》2006,29(4):508-512

英国是当今世界国防科技信息工作发展水平较高的国家，合理地分析其管理体制、保障体系和相应的政策法规环境，借鉴其成功经验，对于加快我国国防科技信息事业的发展进程具有重要的指导与启示意义。  相似文献   

Unsupervised word sense disambiguation for Korean through the acyclic weighted digraph using corpus and dictionary     

Yeohoon Yoon  Choong-Nyoung Seon  Songwook Lee  Jungyun Seo 《Information processing & management》2006

Word sense disambiguation (WSD) is meant to assign the most appropriate sense to a polysemous word according to its context. We present a method for automatic WSD using only two resources: a raw text corpus and a machine-readable dictionary (MRD). The system learns the similarity matrix between word pairs from the unlabeled corpus, and it uses the vector representations of sense definitions from MRD, which are derived based on the similarity matrix. In order to disambiguate all occurrences of polysemous words in a sentence, the system separately constructs the acyclic weighted digraph (AWD) for every occurrence of polysemous words in a sentence. The AWD is structured based on consideration of the senses of context words which occur with a target word in a sentence. After building the AWD per each polysemous word, we can search the optimal path of the AWD using the Viterbi algorithm. We assign the most appropriate sense to the target word in sentences with the sense on the optimal path in the AWD. By experiments, our system shows 76.4% accuracy for the semantically ambiguous Korean words.  相似文献   

基于Web的虚拟地景信息系统研究     

李满春  张健 《科技通报》2005,21(6):752-755,759

基于Web的虚拟地景信息系统是对如何将3DGIS、WebGIS以及VRGIS有效结合起来的一次探索。该系统提供基于Web运行的三维可进人地图，用户通过网页浏览器即可在计算机实时生成的虚拟地景中随意漫游和与之交互。系统基于Java3D实现，在分析Java3D场景图数据结构的基础上，创造性地提出将场景数据保存到数据库中，场景对象按要素分类建表，并把场景对象的属性数据和空间数据保存到同一记录中，从而实现客户端对场景要素的显示控制和对场景对象属性信息的查询。  相似文献   

循环经济的主要科学研究问题   总被引：8，自引：0，他引：8  

孙启宏  段宁 《科学学研究》2005,23(4):490-494

国外循环经济研究主要集中在工业生态学理论和方法、循环技术和循环产业的经济学、循环经济发展战略等方面。近年来我国循环经济建设示范发展很快,但科学研究大大滞后于实践。我国在循环经济领域的科技需求主要包括理论和方法研究、管理技术支撑、循环经济技术研发、循环经济国家战略等。本文最后提出了循环经济科学研究需要遵循的几点原则。  相似文献   

信息资源管理与知识管理关系初探   总被引：8，自引：0，他引：8  

秦铁辉  徐成 《情报科学》2005,23(12):1765-1770

文章讨论了信息资源管理与知识管理的产生时间、内涵与背景的异同，分析了两者的历史联系，指出了它们是人类解决信息问题的不同思路和实现方式．  相似文献   

New Media/Internet Research Topics of the Association of Internet Researchers     

Ronald E. Rice 《The Information Society》2005,21(4):285-299

This study summarizes prior reviews of new media and Internet research, and the growth of the term Internet in academic publications and online newsgroups. It then uses semantic network analysis to summarize the interests and concepts of an interdisciplinary group of Internet researchers, as represented by session titles and paper titles and abstracts from the 2003 and 2004 Association of Internet Researchers conferences. In both years, the most frequent words appearing in the paper abstracts included Internet, online, community, social, technology, and research. The 2003 papers emphasized topics such as the social analysis/research of online/Internet communication, community, and information, with particular coverage of access, individuals, groups, digital media, culture; role and process in e-organizations; and world development. The 2004 papers emphasized topics such as access; news and social issues; the role of individuals in communities; user-based studies; usage data; and blogs, women, and search policy, among others.  相似文献   

Use of place information for improved event tracking     

Yun Jin  Sung Hyon Myaeng  Yuchul Jung 《Information processing & management》2007

The main purpose of topic detection and tracking (TDT) is to detect, group, and organize newspaper articles reporting on the same event. Since an event is a reported occurrence at a specific time and place and the unavoidable consequences, TDT can benefit from an explicit use of time and place information. In this work, we focused on place information, using time information as in the previous research. News articles were analyzed for their characteristics of place information, and a new topic tracking method was proposed to incorporate the analysis results on place information. Experiments show that appropriate use of place information extracted automatically from news articles indeed helps event tracking that identify news articles reporting on the same events.  相似文献   

专利信息在分析竞争对手中的作用   总被引：8，自引：0，他引：8  

刘焕成 《情报科学》2001,19(4):422-424

本文阐述了专利信息在分析对手时二个方面的作用，一是发现竞争对手，二是监测竞争对手的市场策略。  相似文献