医学信息检索双语教材建设

总结了目前医学信息检索双语教材建设的现状,分析了医学信息检索双语教材建设的必要性和可行性,具体阐述了华北煤炭医学院、首都医科大学等国内多所高校联合编写医学信息检索双语教材的实践。     

Sample Sizes and Composition: Their Effect on Recall and Precision in IR Experiments with OPACs

ABSTRACT

This article discusses how samples of records for laboratory IR experiments on OPACs can be constructed so that results obtained from different experiments can be compared. The literature on laboratory IR experiments seems to indicate that the retrieval effectiveness (recall and precision) is affected by the way the samples of records for such experiments are generated. Especially the amount of records and the subject area coverage of the records seems to affect the retrieval effectiveness. This article contains suggestions for the construction of samples for laboratory IR experiments on OPACs and demonstrates that the retrieval effectiveness is affected by different sample size and composition.     

Retrieving with Good Sense

Although always present in text, word sense ambiguity only recently became regarded as a problem to information retrieval which was potentially solvable. The growth of interest in word senses resulted from new directions taken in disambiguation research. This paper first outlines this research and surveys the resulting efforts in information retrieval. Although the majority of attempts to improve retrieval effectiveness were unsuccessful, much was learnt from the research. Most notably a notion of under what circumstance disambiguation may prove of use to retrieval.     

化学文献检索课程双语教学改革

分析了目前影响化学文献检索课程双语教学顺利开展的主要因素。同时,就教材建设、师资队伍建设、教学方法、考核办法、保障措施与激励政策等方面重点介绍了九江学院化学文献检索课程双语教学改革实践。     

信息检索课开展双语教学的探讨

文章在分析了信息检索课开展双语教学的可行性及存在的问题基础上,提出了在教学的初级阶段应采取的一些措施.     

汉语分词对中文搜索引擎检索性能的影响

针对中文网页的特点,研究了汉语分词对中文搜索引擎检索性能的影响。首先介绍中文分词在搜索引擎中的作用,然后介绍常用的分词算法。作者利用网页特征,提出一个简单的“带启发性规则的双向匹配分词策略”。最后,在10G的语料库中,就各种分词算法对查全率和查准率的影响进行了实验比较,结果表明分词性能和检索性能没有正比关系。     

评价情报检索系统性能的新方法--加权中值法

查全率和查准率被大多数情报检索系统作为评价系统性能的方法,但人们已逐渐认识到它们的局限性.本文通过对三组情报检索系统用户相关性判断分布规律实验的数据分析,使用了一种基于用户相关性判断分布规律的方法--加权中值法,对情报检索系统的性能进行评价,并通过倾斜度的计算分析用户相关性判断的态度.     

信息检索课开展双语教学的必要性与对策

论文根据信息检索课开展双语教学的现状，论述了在信息检索课程中进行双语教学的必要性、优势、教学方法以及提高双语教学的措施。     

From Plain Character Strings to Meaningful Words: Producing Better Full Text Databases for Inflectional and Compounding Languages with Morphological Analysis Software

The paper deals with linguistic processing and retrieval techniques in fulltext databases. Special attention is focused on the characteristics of highly inflectional languages, and how morphological structure of a language should be taken into account, when designing and developing information retrieval systems. Finnish is used as an example of a language, which has a more complicated inflectional structure than the English language. In the FULLTEXT project, natural language analysis modules for Finnish were incorporated into the commercial BASIS information retrieval system, which is based on inverted files and Boolean searching. Several test databases were produced, each using one or two Finnish morphological analysis programs.     

图书馆电子阅览室对于高校双语教学改革的辅助作用

论述我国高校双语教学的现状及开展双语教学的重要性,探讨了高校实施双语教学的方法,重点分析了图书馆电子阅览室辅助双语教学改革的主要方式.     

WWW信息检索系统评介

WWW是目前全球最大的信息系统,本文主要介绍了WWW信息检索系统的分类、WWW信息检索技术、WWW信息检索领域的新成果新思想。结尾阐明WWW信息检索的发展趋势。     

Word Division in the Transcription of Chinese Script in the Title Fields of Bibliographic Records

ABSTRACT

Recently, the Library of Congress adopted the pinyin Romanization system for transcribing Chinese data in its bibliographic records. In its canonical form, pinyin aggregates Chinese “words” into single linguistic units, but pinyin entries could be constructed following either a monosyllabic or a polysyllabic pattern. Although the former is easier and less costly to implement, the latter method is potentially more beneficial for end-users, as it reduces ambiguity, and generates a much larger variety of indexable terms. The current study investigates if following the polysyllabic method improves retrieval efficiency and effectiveness in item-specific searching within online bibliographic databases. Analysis of the results revealed that aggregation of monosyllables does improve efficiency significantly (p < .05), especially during keyword searches, while effectiveness remains mainly unaffected.     

着眼于信息代表性和覆盖面的"成组信息检索"模型

社会上广泛存在的着眼于信息代表性和覆盖面的信息需求 ,向现有的检索“查全率”、“查准率”、信息“相关性”排序等概念 ,向建立在这些概念之上的以单条信息作为检索结果基本提交单位的检索方法及其排序方法提出了挑战。为满足这一类信息需求 ,本文提出了“成组信息检索”概念及其模型 ,并提出了用于多维向量在多目标综合要求下进行成组动态优选的“变动式字典排序”规则。该模型可用于开发“战略形势分析信息精选系统”、“发展动态分析信息精选系统”、“综述背景信息精选系统”等从网络海量信息中精选信息的检索系统。     

情报检索在研究性学习中的作用

文章阐述研究性学习的含义及特点,论述了情报检索在研究性学习中的作用,提出了在计算机情报检索方面图书馆员应做好的几项工作.     

基于教学内容的新信息环境下高校信息检索课程的探讨

为明晰高校信息检索课程内容的现状,利用实证方法对信息检索课程的教学内容进行分析,并以信息技术为本课程带来的挑战和机遇为切入点,从信息源、信息检索技术、信息检索策略和信息分析与评价方面展开探讨,为新信息环境下教学内容建设中出现的若干问题提出相关对策建议。最后基于信息检索课程教学内容的横向发展,完善信息检索课程教学内容体系。期望进一步探求新信息环境下信息检索课程的发展。     

网络信息检索中情报检索语言一体化原理的应用分析

本文阐述了情报检索语言一体化原理 ,就其在网络信息检索中的应用现状进行了研究 ,并分析了目前存在的一些问题     

BBS在医学信息检索与课程教学中的应用

介绍了医学信息检索中如何应用RSS获取信息资源,例如数据库、电子期刊、免费学术资源以及搜索引擎的RSS服务等,并探索RSS在信息检索课程教学活动中的创新应用,以优化教学效果。     

网络环境下信息存储与检索技术的发展

信息存储与检索技术是信息传递中的重要环节。检索语言和检索效率密切相关，它在信息检索过程中起着语言保障的作用。为满足不同用户能够检索到所需要的信息，检索语言必然朝着自然语言、用户界面友好的方向发展。