简论“兰氏理论”对科学信息交流的影响   总被引：1，自引：0，他引：1  

钱建国  方卿 《情报科学》2002,20(6):643-645

在回顾F.W.兰开斯特的“无线理论”产生背景的基础上，本文从科学信息交流的主流媒体、科学信息交流的过程、科学信息机构的定位等三个方面分析了该理论的提出对科学信息交流的影响。  相似文献   

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   

信息传播中的负效应分析   总被引：5，自引：0，他引：5  

谢玉宁 《情报科学》2003,21(1):19-21,32

在信息时代，信息量的剧增和信息共享给我人带来更多有用的信息资源的同时，也给我们带来了许多隐患，信息污染就是比较突出的问题。本文对信息传播中由于信息污染问题所带给人们的种种负效应进行分析，并从信息传播角度和环境角度论述信息污染的原因，从宏观与微观调控提出对信息隐患的防治措施。  相似文献   

E-Commerce to Protect the Network Relationships: The Case of Taiwan's PC Industry     

Tain-Jy Chen 《The Information Society》2003,19(1):59-67

Although Taiwan is one of the world's leading producers of information products, it lags behind advanced countries in the application of information technologies. The strength of Taiwan's industry lies in its low-cost manufacturing capabilities, which in recent years have been undermined by rising wages. Faced with a massive relocation of production activities to China, the Taiwanese government is trying to prevent the hollowing out of domestic industry by encouraging local firms to embrace new information technologies to strengthen their ties to multinational firms. The initiative aims at enhancing the flexibility of production and speeding up responses to the market through concerted actions by brand marketers, parts suppliers, and assemblers. New technologies underscore new working methods that erect entry barriers to protect existing network relationships.  相似文献   

基于用户需求的网络信息服务建设   总被引：14，自引：0，他引：14  

田建新 《情报科学》2004,22(4):493-494,498

本文通过对信息用户在网络环境下对信息需求变化的分析，认为要适应信息用户需求的这一变化，网络信息服务商必须从不断增加网络信息资源的数量和不断提高网络信息服务的质量两个方面着手。  相似文献   

推动经济社会信息化的研究     

魏浩 《情报科学》2003,21(4):354-356

本文通过对当前社会经济特点、信息化、信息化对经济的影响以及怎样发展信息化的论述，阐明了信息化是社会经济增长的重要因素之一，也是未来社会发展的必然方向。  相似文献   

2001年《情报科学》载文、作者及引文的统计分析   总被引：7，自引：3，他引：7  

吕福谦 《情报科学》2003,21(11):1173-1175

本文运用文献计量学的方法，对2001年出版的《情报科学》载文、作者及引文的统计分析，阐述了该刊载文特点、作者及引文特点。  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   

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   

高校学科团队中魅力型领导对团队创新绩效影响的实证研究   总被引：4，自引：0，他引：4  

刘惠琴  张德 《科研管理》2007,28(4):185-191

本文在文献回顾的基础上,提出魅力型领导对团队创新绩效的假设模型,并通过对中国高校79个学科团队607名教师的问卷调查验证这一模型。结果显示:魅力型领导能力和行为对团队创新气氛与团队创新绩效具有显著正向效果,但其对团队创新绩效的直接效果不显著,其通过团队创新气氛中介作用的间接效果显著;而且高校学科团队领导能力对团队创新绩效的整体效果高于领导行为。最后指出,在实践管理中高校学科团队领导要提高学科带头能力和组织协调能力,营造平等、自由的团队创新气氛,以提高团队创新绩效。  相似文献