Ei Village2检索与服务新功能

本文介绍了Ei Village2主要检索功能和技术，重点介绍新增加或加强的索引字段使用、检索结果处理、电子邮件(E-mail)提醒、个人帐户运用等内容。     

The Development of Business-to-Business Magazines in China

Business-to-Business (B2B) publications actually have a long history in China, beginning in the early twentieth century. After 1949, the Chinese economy became planned and regulated by the government, the former B2B magazines became their purpose to explain the government’s industrial policies, chart business direction and exchange developmental experience. As China began its reform and opened to a market economy in the 1980s, traditional published B2B magazines began to reappear. Today almost 3,000 B2B magazines provide information about specific industries and services.     

基于P2P和主题图的分布式合作数字参考咨询知识库建设

针对分布式合作数字参考咨询知识库建设存在的资源分布异构、可扩展和知识管理等问题,在深入分析P2P、主题图和OAI等技术的基础上,提出一种基于P2P和主题图的合作数字参考咨询的知识库建设方法,以有效解决以上问题。     

新条码技术在现代图书馆中的应用与发展

传统条码技术在图书馆中得到广泛的应用。随着以二维条码、三维条码为代表的新条码技术的发展以及上下游产业链的完善,它必将成为新的信息载体,在图书馆的应用中大显身手。     

局部文本特征选取算法的比较和改进研究

本文通过实验比较了互信息、χ2统计算法和优势率三种算法在用于局部文本特征选取时对文本分类性能的影响.实验结果显示,在应用于局部特征选择的情况下,文本特征选取算法仍然可以将特征空间的维度降低90%以上,而不降低文本分类的性能.同时,我们发现在应用于局部文本特征选取时,优势率算法的性能不如互信息和χ2统计算法.另外,对于K最近邻分类算法,随着K值的增大,文本分类的查准率在增加,而查全率在降低.最后,本文详细分析了造成这三种算法性能差异的原因,并提出了一种改进算法,来提高优势率算法应用于局部文本特征选取时的性能.     

RDA与其中文译名

RDA 是国际编目界的热点问题,也越来越受到国内同仁的关注.本文介绍了 RDA 名称的由来,它的战略目标、结构与目前的进展情况,并简述从AACR2到RDA的主要变化.到目前为止,相关研究中提到RDA时,已经出现了几种中文译名,其中比较多见的有3种.本文建议,尽管RDA要到2009年才最终出版,但为了避免在以后的工作和研究中面临不必要的麻烦,现在就应该对RDA采用统一的中文译名.     

Technological research in the EU is less efficient than the world average. EU research policy risks Europeans’ future

We have studied the efficiency of research in the EU by a percentile-based citation approach that analyzes the distribution of country papers among the world papers. Going up in the citation scale, the frequency of papers from efficient countries increases while the frequency from inefficient countries decreases. In the percentile-based approach, this trend, which is uniform at any citation level, is measured by the e_p index that equals the P_{top 1%}/P_{top 10%} ratio. By using the e_p index we demonstrate that EU research on fast-evolving technological topics is less efficient than the world average and that the EU is far from being able to compete with the most advanced countries. The e_p index also shows that the USA is well ahead of the EU in both fast- and slow-evolving technologies, which suggests that the advantage of the USA over the EU in innovation is due to low research efficiency in the EU. In accord with some previous studies, our results show that the European Commission’s ongoing claims about the excellence of EU research are based on a wrong diagnosis. The EU must focus its research policy on the improvement of its inefficient research. Otherwise, the future of Europeans is at risk.     

基于词向量扩展的学术资源语义检索技术

[目的/意义] 尝试以统计的方法为指导思想,探究基于词向量扩展的语义检索技术来提升学术资源的语义检索能力。[方法/过程] 利用自然语言处理、文本挖掘技术,对采集来的学术资源（主要是学术论文）元数据进行预处理,结合word2vec词向量生成工具和elasticsearch全文检索引擎搭建语义检索系统,对学术资源进行语义检索的探索研究。[结果/结论] 本文提出的方法能够有效提升学术信息的检索效果,一定程度上实现学术资源的语义检索,并为后续语义检索的进一步研究提供借鉴。     

基于D2R发布学者关联数据集探究——以图书情报领域为例

[目的/意义]探讨学者关联数据集的定位及其构建方法,以期为学科发展、学者评价与信息共享利用提供便利。[方法/过程]在阐释现有机构知识库内涵基础上,分析学者关联数据集之功能特点,并以我国图书情报领域为例,通过开源软件D2R发布该领域学者的关联数据集。[结果/结论]学者关联数据集不同于机构知识库,它以所属学科领域的学者为数据起点,以网罗一切相关信息资源,并以完全开放、关联与共享的方式提供知识。在学者关联数据集的构建与发布过程中,重点需克服实体URI定义、作者重名、专著与网络学术记录难以采全等问题。