《文献(信息)检索》课案例教学法初探

案例教学法是《文献检索》课实践教学中最常用的一种方法。在不同的教学环境中对提高学生的学习兴趣,培养和训练学生的业务能力等均有较明显的效果。但由于种种原因,也存在某些局限性,须通过精选案例、处理数学矛盾、妥善安排时间等扬长避短。     

图书馆学对象研究:审问与批判

对图书馆学研究对象的研究重新进行审视,提出了如下几个问题:研究对象的变换何时了?问题之争有多大的必要性?研究对象到底是什么?研究对象与图书馆学成熟的关系如何?是多研究些“问题”还是多谈些“主义”?等等。对这些问题进行了分析和评判。     

馆藏评价与新时期馆藏建设工作思考

从实体馆藏和虚拟馆藏的评价方法及采选原则入手，探讨网络信息时代如何加强馆藏资源建设问题。     

我国高校图书馆用户在线信息服务研究

对我国34所大学图书馆的网络调研结果表明,用户在线服务存在着信息资源检索服务不够深广、信息参考咨询服务手段缺乏高效、在线电子资源利用教育尚处于建设初期、学科导航个性化不够明显、服务项目缺乏规范化管理等问题。提出整合资源、提供全方位信息资源检索平台,提供在线一体化虚拟学习环境等建设性意见。表1。参考文献6。     

Two-stage statistical language models for text database selection

As the number and diversity of distributed Web databases on the Internet exponentially increase, it is difficult for user to know which databases are appropriate to search. Given database language models that describe the content of each database, database selection services can provide assistance in locating databases relevant to the information needs of users. In this paper, we propose a database selection approach based on statistical language modeling. The basic idea behind the approach is that, for databases that are categorized into a topic hierarchy, individual language models are estimated at different search stages, and then the databases are ranked by the similarity to the query according to the estimated language model. Two-stage smoothed language models are presented to circumvent inaccuracy due to word sparseness. Experimental results demonstrate that such a language modeling approach is competitive with current state-of-the-art database selection approaches.     

Hierarchical clustering of a Finnish newspaper article collection with graded relevance assessments

Search facilitated with agglomerative hierarchical clustering methods was studied in a collection of Finnish newspaper articles (N = 53,893). To allow quick experiments, clustering was applied to a sample (N = 5,000) that was reduced with principal components analysis. The dendrograms were heuristically cut to find an optimal partition, whose clusters were compared with each of the 30 queries to retrieve the best-matching cluster. The four-level relevance assessment was collapsed into a binary one by (A) considering all the relevant and (B) only the highly relevant documents relevant, respectively. Single linkage (SL) was the worst method. It created many tiny clusters, and, consequently, searches enabled with it had high precision and low recall. The complete linkage (CL), average linkage (AL), and Ward's methods (WM) returned reasonably-sized clusters typically of 18–32 documents. Their recall (A: 27–52%, B: 50–82%) and precision (A: 83–90%, B: 18–21%) was higher than and comparable to those of the SL clusters, respectively. The AL and WM clustering had 1–8% better effectiveness than nearest neighbor searching (NN), and SL and CL were 1–9% less efficient that NN. However, the differences were statistically insignificant. When evaluated with the liberal assessment A, the results suggest that the AL and WM clustering offer better retrieval ability than NN. Assessment B renders the AL and WM clustering better than NN, when recall is considered more important than precision. The results imply that collections in the highly inflectional and agglutinative languages, such as Finnish, may be clustered as the collections in English, provided that documents are appropriately preprocessed.     

从分类主题论文看图书馆学研究的方向与趋势--基于十种图书馆学核心期刊五年载文的分析

本文从分类主题入手 ,通过对《中国图书馆学报》等十种图书馆学核心期刊五年来的载文统计分析 ,探讨了图书馆学研究的主要方向 ,并预测其未来的发展趋势     

桂林图书馆外文部读者分析及工作措施

根据对582名读所作调查，对桂林图书馆外部的读结构、读的需求情况进行了系统分析，并提出了一系列具体的工作改进建议。     

信息检索课双语教学探讨

在双语教学实践的基础上，论述了在信息检索课中实行双语教学的必要性、可行性和教学方法，分析了双语教学面临时问题，并提出了对策。     

网络链接分析研究进展

本文对网络链接分析研究的进展情况作了较为全面、详细的介绍，并分析了目前网络链接分析研究中存在的问题。