共查询到20条相似文献，搜索用时 156 毫秒
1.
《The Reference Librarian》2013,54(35):83-94
This article concentrates on the national services and databases in the Nordic countries. The availability of information via networks is the main discussion topic. The Nordic libraries have a long tradition of cooperation. The basic idea at present is to make the national information of each country available to all users within Scandinavia, to create a "Union Nordic Library." The necessary qualifications for that kind of co-operation are very good: the development of the national systems is in process or already operational at a high technical level; the Nordic research networks are connected to each other and to international networks; the data itself is in standardized form and very well covers the recent publications. 相似文献
2.
Lingle VA 《Medical reference services quarterly》1990,9(3):1-14
The HEALTH PERIODICALS DATABASE, produced by the Information Access Company, is a unique online file which provides full-text access to both general interest health-related literature and key technical resources in the medical field. Available on DIALOG and CompuServe, the database is described as a useful tool for information on the health, fitness, and nutrition industries. Special features of the database are reviewed and comparisons are made with resources of similar scope. 相似文献
3.
皖江文化特藏文献的分析与采集研究 总被引：2，自引：0，他引：2
以皖江文化为切入点,对皖江文化特藏文献的特征、分布情况、特藏结构、形式和作用进行深入细致的分析,并结合实际需求,对特藏文献采集的要求、原则和途径进行论述,以避免皖江文化特藏文献建设过程中的盲目性和随意性。 相似文献
4.
Compressing Inverted Files 总被引：2，自引：0，他引：2
Andrew Trotman 《Information Retrieval》2003,6(1):5-19
Research into inverted file compression has focused on compression ratio—how small the indexes can be. Compression ratio is important for fast interactive searching. It is taken as read, the smaller the index, the faster the search.The premise smaller is better may not be true. To truly build faster indexes it is often necessary to forfeit compression. For inverted lists consisting of only 128 occurrences compression may only add overhead. Perhaps the inverted list could be stored in 128 bytes in place of 128 words, but it must still be stored on disk. If the minimum disk sector read size is 512 bytes and the word size is 4 bytes, then both the compressed and raw postings would require one disk seek and one disk sector read. A less efficient compression technique may increase the file size, but decrease load/decompress time, thereby increasing throughput.Examined here are five compression techniques, Golomb, Elias gamma, Elias delta, Variable Byte Encoding and Binary Interpolative Coding. The effect on file size, file seek time, and file read time are all measured as is decompression time. A quantitative measure of throughput is developed and the performance of each method is determined. 相似文献
5.
随着计算机技术的迅速发展,单片机、各种传感器的精度日益提高,人们对档案馆自动检测技术有了更高的要求.文中就影响档案存放质量的环境因素,首次提出“馆情”的概念;针对馆内温湿度是严重影响着档案馆存放档案质量的问题,作者又重点介绍了温湿度数据的获取技术和软硬件的设计方法,这为“馆情”自动获取技术方法研究提供技术支持. 相似文献
6.
[目的/意义]为更好地提升科技文献的语义丰富化效果,对国内外科技文献语篇元素标注模型、技术和方法进行调研总结,为文本挖掘、科技论文知识抽取、语义分析系统研究者提供借鉴。[方法/过程]利用学术网站搜索和相关数据库搜索引擎,对涉及科技论文标注、语篇元素、知识抽取、句子识别和自动文章分类等参考文献以及研究报告进行深入阅读和调研,对语篇元素自动标注模型以及相关工作进展进行研究总结。[结果/结论]科技文献语篇元素标注具有非常重要的实际应用价值,构建标注模型需充分考虑构建思想、标注领域和标注粒度以及标注技术手段等方面。 相似文献
7.
将新媒体艺术与文献阅读关联,从信息设计与传播的角度出发,考虑娱乐化阅读效果,这是一种新的价值取向.新媒体与新媒体艺术的主要特点有三个,即技术性、交互性、体验性.新媒体的核心还是技术.新媒体艺术与文献关联悦读效果主要表现在联想与延伸、参与体验、激发潜在智慧等方面. 相似文献
8.
Fitzpatrick RB 《Medical reference services quarterly》2003,22(4):45-56
This column features an overview of the Institute for Scientific Information's (ISI) Journal Citation Reports (JCR) database. Basic searching techniques are presented, as well as simple ways to manipulate data contained in the file. The Journal Citation Reports database can provide information on highest impact journals, most frequently used journals, "hottest" journals, and largest journals in a field or discipline. 相似文献
9.
随着档案信息化建设的发展和网络技术的更新,如何将计算机技术运用到档案工作中已成为目前全国档案界亟待解决的问题。档案用户的回访方式涵盖面广,而文章拟就其具体的网络回访方式进行研究,对档案用户回访网络系统的构建加以思考,分析其构建意义,并列出具体构建指标及网络系统界面。 相似文献
10.
建设"5·12"汶川地震文献专题数据库旨在保存人类历史记忆、传承民族精神,供学术参考和行政决策以及为其他专题文献数据库建设提供借鉴。数据库建设平台的规划与设计围绕系统管理、数据管理、用户共享、门户基本服务、文献检索与服务展开,其中文献量的增加、文献质量控制与及时更新,以及提供利用的开放性与公益性是该数据库建设的关键与难点。项目的创新之处在于新的数据库定位思路、文件数据库及开放资料收集平台的引入以及一批标准规范的制定,而该项目的最终研究成果表现为研究报告及数据库两大部分。 相似文献
11.
12.
档案服务具有政治性、经济性、文化性、社会性等特点。档案服务是基本公共服务体系的有机组成部分。增强档案服务力,可以采取“沉下去”“预约式”“在线式”等方式应对档案服务中存在的间接性、被动性、互动性差等局限。 相似文献
13.
分析和比较了国内外17个知名网盘搜索引擎的检索结果数量、速度、准确度和功能,对各项性能及综合性能进行了评分和排序,国外的Filestube、Sharedirectory、JetDL、Rapidlibrary和国内的网盘精灵以较高的综合性能受到用户推崇。总体来看,国内网盘搜索引擎的各项性能与国外网盘搜索引擎差距比较大,建议国内网盘搜索引擎以开发自有搜索技术为突破口,同时尽量扩大可搜索的国内外网盘资源范围来提高性能。 相似文献
14.
15.
16.
论文中署名“通信作者”的有关问题 总被引：3，自引：1，他引：2
比较对"通信作者"认识的不同观点。认为注明"通信作者"的目的是便于文章读者以及编辑部与作者联系,而把"通信作者"看成了"指导作者"或"责任作者",并要求通信作者具有高级技术职称等看法和做法是没有依据的。 相似文献
17.
Jinfang Niu 《档案与原稿》2013,41(2):105-115
Through examining the concept of provenance and its use in several communities, including archives management, computer science, rare book cataloging and archaeology, this paper presents an expanded view of provenance. For end-users, provenance covers the whole life cycle of records, from creation and evolution to acquisition, processing, preservation and access. During each stage of this life cycle, both the sociopolitical context and technical details fall within the scope of provenance. 相似文献
18.
本文详细地讨论了CCBD 光盘研制中的技术问题, 提出了光盘数据库的数据结构设计的总原则, 并具体描述了文件结构和记录格式。文章还讨论了检索程序中的主要技术, 如提问处理、布尔检索等。 相似文献
19.
《资料收集管理》2013,38(1-2):85-94
The Lister Hill National Center for Biomedical Communications, R&D arm of the National Library of Medicine, has had under development a minicomputer based INTEGRATED LIBRARY SYSTEM (ILS). ILS Version 1.0 has recently become operational and supports modules for master bibliographic file (MBF) creation and processing, circulation control, and serials check-in. A major emphasis in the design of the ILS has been on collection management and control. The present implementation supports "intelligently" assigned bar-codes for both monographs and serials from the MBF. The barcodes contain sufficient information about each item to provide efficient processing and allow easy use of portable devices for inventory control. In addition, unique functions have been included to allow identification of temporary item locations as well as to allow the compilation of statistics on items removed from the shelf but not circulated. The potential impact of these features on collection management will be discussed. 相似文献
20.
文学网站内容生产的“微支付”模式与版权解决体系分析——以盛大网络为例 总被引：1，自引：1，他引：0