中美商情数据库建设比较研究     

杨奕虹  武夷山 《情报学报》2003,22(3):315-320

美国是商情数据库建设起步最早、发展最快的国家 ,因此研究美国商情数据库建设及其发展对加速我国商情数据库的建设有着实际的意义。本文通过对中美两国商情数据库发展概况的比较研究 ,发现我国商情数据库建设中存在的问题 ,并提出几点建议  相似文献   

Extensions to the STAIRS Study—Empirical Evidence for the Hypothesised Ineffectiveness of Boolean Queries in Large Full-Text Databases     

Eero Sormunen 《Information Retrieval》2001,4(3-4):257-273

The STAIRS study conducted by Blair and Maron in the mid-80's is a milestone in the history of IR evaluation. Blair and Maron made strong conclusion about the inadequacy of free-text searching large databases, and their study has been widely referred in the literature to justify the problems of effectiveness in IR systems. However, some critics of the study have plausibly pointed out that the ineffectiveness conclusions were not solidly based on empirical data.This paper introduces a new theoretical and empirical approach to study the problems of high recall searching in large databases and reports the results of a case experiment. The findings verify some of the hypothetical conclusions introduced in the STAIRS study, and expands the picture of falling performance. It is shown that low precision in high recall searching is unavoidable in exact-match Boolean searching since even major concepts are often expressed implicitly in relevant documents. The author suggests that the problem could be reduced in facet-based best-match searching.  相似文献   

基于Java技术解决数字图书馆异构平台数据库访问   总被引：10，自引：0，他引：10  

刘科  郑巧英  徐汝兴 《现代图书情报技术》2002,18(3):10-13

文章简要介绍和分析了几种基于Web的数据库访问技术及其局限性。详细论述了JSP/Serlet和JDBC技术原理在数据库访问中的实现过程和实现机制。论述了基于Java技术的Browser-Server多层体系架构模型的图书馆异构平台数据源访问系统解决方案。  相似文献   

我国高校图书馆特色数据库建设现状及发展策略研究   总被引：14，自引：1，他引：13  

刘莹 《图书馆学研究》2008,(7)

本文采用文献调查分析和网络调查分析等方法,调查了我国高校图书馆特色数据库建设的现状,所取得的成绩和存在的问题,提出了完善我国高校特色数据库发展的建议。  相似文献   

图像数字化整合技术应用研究     

吴涛  郭金玲 《高校图书馆工作》2008,28(2):41-43

系统地总结和研究了图像数字化技术应用的新成果和经验,探讨了图像数字化加工过程中诸多环节的关键技术问题,并较为具体地给出了解决的方案.参考文献3.  相似文献   

The Future of the Past: Archaeology and Anthropology on the World Wide Web     

John W. Hoopes 《Archives and Museum Informatics》1997,11(2):87-105

In the final scene of Raiders of the Lost Ark, a crate containing the object of Indiana Jones' quest is wheeled into an immense warehouse for indefinite storage and questionable research access. Unfortunately, this fate is not all that far from reality. Collections of archaeological and ethnographic materials ranging from stone axes, broken potsherds, and carved monuments to baskets, ceremonial masks, and skin canoes have been held by museums collections since the Renaissance. However, their inestimable value and unique conservation and curatorial requirements often conspire to remove them from the reach of all but the most diligent scholars. The potential of the Web to enhance the quality of research on archaeological and ethnographic collections is enormous. This paper will examine ways that one can use the Web to enhance research and improve access to a variety of materials; while there are many other resources for archaeology available on the Web, this paper focusses on museum-related sites. It will also explore the potential of the Web for innovative research strategies. Digitization of catalogs, associated documents, and images to help one locate and study collections and specific artifacts are just one approach. Others include the connection of devices to the Web, such as cameras and microscopes, the creation of virtual reference collections, and the establishment of research networks that will enhance the identification and analysis of material culture. This paper will also consider the role the Web could play in issues of cultural property, contributing to and in many ways intensifying ongoing debates of ownership, curation, conservation, and repatriation of sensitive materials.  相似文献   

专题数据库光盘发布技术原理及其实践应用     

苏金燕  夏吉安 《河南图书馆学刊》2006,26(6):105-107

当前信息服务机构已纷纷通过建立专题数据库为用户提供信息服务,而专题数据库的发布、使用方式则在很大程度上影响专题数据库的使用效果。首先讨论数据库的一般发布载体,主要有纸张I、nternet和光盘等;其次讨论了专题数据库光盘发布实现的技术、原理;最后给出了此技术的应用、实践实例。  相似文献   

跨库检索策略研究     

沈筱璇 《图书馆学研究》2006,(12):66-67,65

本文在研究跨库检索系统的基础上，根据跨库检索系统特点提出制定跨库检索策略的方法。  相似文献   

创建基于Microsoft Indexing Service的Web全文检索系统     

唐光前 《图书情报工作》2004,48(3):64-66

分析基于Microsoft Indexing Service创建Web全文检索系统的理由及Microsoft Indexing Service的索引机制,并利用Mi-crosoft Visual C#.NET技术给出一个具体实现方案。  相似文献   

关于自然语言检索问题   总被引：13，自引：0，他引：13  

张琪玉 《图书馆论坛》2004,24(6):211-213,145

自然语言检索当前仅在关键词检索的层次上已经实现，重点分析了全文检索所适应和不适应的检索要求及其评价，用分析说明了当前关于自然语言检索的主流观点的不切实际，指出自然语言检索的发展方向是与情报检索语言结合和融合。  相似文献