混沌信息空间信息组织面临的挑战和机遇   总被引：1，自引：0，他引：1  

刘玉仙  顾琛 《情报科学》2004,22(6):668-670,678

本文探讨了在混沌信息空间里，信息组织所面临的挑战和机遇。主要从信息描述、信息组织结构、结构创新这三个方面展开阐述，阐明面临多态复杂的信息环境时，如何建立一种符合知识进化形态的具有自组织和内在驱动能力的知识组织结构。  相似文献   

A relevance feedback mechanism for cluster-based retrieval     

Niall Rooney  David Patterson  Mykola Galushka  Vladimir Dobrynin 《Information processing & management》2006

Contextual document clustering is a novel approach which uses information theoretic measures to cluster semantically related documents bound together by an implicit set of concepts or themes of narrow specificity. It facilitates cluster-based retrieval by assessing the similarity between a query and the cluster themes’ probability distribution. In this paper, we assess a relevance feedback mechanism, based on query refinement, that modifies the query’s probability distribution using a small number of documents that have been judged relevant to the query. We demonstrate that by providing only one relevance judgment, a performance improvement of 33% was obtained.  相似文献   

A citation-based document retrieval system for finding research expertise     

Quan Thanh Tho  S.C. Hui  A.C.M. Fong 《Information processing & management》2007

Current citation-based document retrieval systems generally offer only limited search facilities, such as author search. In order to facilitate more advanced search functions, we have developed a significantly improved system that employs two novel techniques: Context-based Cluster Analysis (CCA) and Context-based Ontology Generation frAmework (COGA). CCA aims to extract relevant information from clusters originally obtained from disparate clustering methods by building relationships between them. The built relationships are then represented as formal context using the Formal Concept Analysis (FCA) technique. COGA aims to generate ontology from clusters relationship built by CCA. By combining these two techniques, we are able to perform ontology learning from a citation database using clustering results. We have implemented the improved system and have demonstrated its use for finding research domain expertise. We have also conducted performance evaluation on the system and the results are encouraging.  相似文献   

Dictionary-based text categorization of chemical web pages     

Chun-Yan Liang  Li GuoZhao-Jie Xia  Feng-Guang NieXiao-Xia Li  Liang SuZhang-Yuan Yang 《Information processing & management》2006

A new dictionary-based text categorization approach is proposed to classify the chemical web pages efficiently. Using a chemistry dictionary, the approach can extract chemistry-related information more exactly from web pages. After automatic segmentation on the documents to find dictionary terms for document expansion, the approach adopts latent semantic indexing (LSI) to produce the final document vectors, and the relevant categories are finally assigned to the test document by using the k-NN text categorization algorithm. The effects of the characteristics of chemistry dictionary and test collection on the categorization efficiency are discussed in this paper, and a new voting method is also introduced to improve the categorization performance further based on the collection characteristics. The experimental results show that the proposed approach has the superior performance to the traditional categorization method and is applicable to the classification of chemical web pages.  相似文献   

基于本体论的数字图书馆搜索引擎的研究     

赵亚莉  魏淑琴 《现代情报》2007,27(8):104-106

基于本体（ontology）理论,利用本体对概念、术语及其相互关系的规范化描述,勾画出数字图书馆领域的基本知识体系,构建了数字图书馆领域本体库;然后,对现有的图书馆搜索引擎系统进行了改进,将构建的本体库引入到系统中,实现了基于本体的信息检索,方便用户对资源的查询,为用户提供高质量的个性化服务。  相似文献   

GIS在CRM系统中的应用研究     

朱海兵  艾菊梅 《科技广场》2007,(1):155-156

本文探讨了GIS在CRM(Customer Relationship Management)中的应用,以期不断促进GIS在企业管理与决策及电子商务中的应用。  相似文献   

信息素质教育的发展及优化策略   总被引：19，自引：0，他引：19  

魏浩  张文娟 《情报科学》2004,22(3):291-294,298

本文通过对国外信息素质教育现状及国内信息素质教育状况的分析，提出影响国内信息素质教育的瓶颈，进而提出我国信息素质教育发展的优化策略。  相似文献   

社区信息服务策略——以成都市双楠社区为例     

余杰  沈治宏 《现代情报》2007,27(3):80-82

文章论述了社区信息服务,并指出社区信息服务在中国发展迅速。文章运用直接调查和文献调查相结合的研究方法,从双楠社区的信息服务现状推广到广大社区,并提出了社区信息服务的建设目标,参照其他文献着重论述了社区信息服务中信息系统建设、社区行政机构职能的发挥等四方面的策略,最后对社区信息服务的未来进行了展望。  相似文献   

如何界定情报信息的寿命   总被引：1，自引：0，他引：1  

刘衍双  史蔷 《情报科学》2004,22(3):276-278

本文以传统情报文献信息与现代情报信息的特性差异为切入点，认真分析了情报文献信息内涵的变化与发展，比较与求证决定情报文献信息寿命的诸多要素，最终导出科学的情报信息寿命观，这对于正确指导现代网络环境下情报信息工作的实践具有重要意义。  相似文献   

信息技术对传统产业结构影响分析   总被引：6，自引：0，他引：6  

刘虹涛  靖继鹏 《情报科学》2002,20(3):333-336

信息技术由于其具有的广泛性和渗透性，在传统产业改造中，能加快传统产业的产品更新周期，提高资源利用效率，改变需求结构、产品结构，提高质量，降低成本，增进局部乃至整体企业、行业的经营整理效率，从而促进传统产业结构的改变。  相似文献