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.     

公共图书馆的分馆建设探讨

文章以吉林省图书馆的分馆建设为例，对公共图书馆的分馆办馆模式、资源建设、读者服务进行了探讨。     

从“席位分配”模型到图书馆书刊采购模型

通过对席位分配模型的研究,从书刊购买的影响因素入手,使用定量的方法,给出了图书馆书刊采购的精确模型。该模型有助于公平地分配经费,购买不同学科书刊。表1。参考文献4。     

从FRBR看编目条例及机读目录格式的变革路向

在实体信息资源和网络信息资源并存的今天,编目对象应从文献单元和表达形式层次提高到表现方式和著作的层次,编目条例和机读目录格式也应作相应的变革。制订以表现方式以及著作实体为编目对象的编目条例是机读目录格式的变革路向。表1。图4。参考文献10。     

基于可持续发展观的协同模型--论图书情报事业发展

图书情报与国民经济的协同发展是对可持续发展观的具体实现，本文提出进入与实施双层协同模型，并具体阐述了要素、领域、对象、进入方式、频率、模式、力度等构建过程。为图书情报事业发展提供参考。     

Modellierung und kartographische Visualisierung von Geodaten mit XML-basierten Sprachen

Zusammenfassung Mit den XML-basierten Sprachen GML, XSLT und SVG lassen sich Geodaten nicht nur anwendungsorientiert modellieren, sondern auch karten?hnlich visualisieren. In dieser Fallstudie zeigen wir das, indem wir realistische Geodatenbest?nde der Landesvermessungs?mter zun?chst mit der Geography Markup Language (GML) nachmodellieren. So mit GML strukturierte Daten werden dann mit der Extensible Stylesheet Language for Transformation (XSLT) auf Elemente der Sprache Scalable Vector Graphics (SVG) abgebildet. Dabei wird der Prozess der kartografischen Visualisierung durch XSLT-Konstrukte modelliert und auch gleichzeitig implementiert. Als Ergebnis erhalten wir Grafiken, die den entsprechenden Karten der Landes?mter zumindest nicht un?hnlich sind.

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Using the XML-based languages GML, XSLT and SVG, we modeled German geo data and also visualized it in map-like graphics. This case study shows the feasibility of that approach, by modelling the data with the Geography Markup Language (GML). Then, the GML-structured data is mapped with the Extensible Stylesheet Language for Transformation (XSLT) to elements of the language Scalable Vector Graphics (SVG). The process of cartographical visualization is thus modelled through XSLT-constructs and at same time also implemented. The results are graphics, which share close ressemblance to the corresponding maps of the official offices.

CR Subject Classification I.3.3,I.3.5,I.6.5,I.7.2,J.2     

关于上市公司财务预警机制的思考

目前,我国上市公司的信息披露尚欠规范,给证券市场的正常运作带来诸多不利影响,这也使得公司财务风险更加突出.上市公司很有必要保持警惕,建立适合于企业本身的财务预警系统,设计出相应的财务预警模型.     

Lighting the Shroud of Turin for Exhibition in 2015

ABSTRACT

Lighting a cultural heritage artifact requires balancing visual perception with preventive conservation, by providing the best lighting (in terms of spectral distribution and quantity) to enable the viewer to appreciate details and color, while limiting photo-induced degradation. The paper outlines the methodology applied by a multi-disciplinary team while lighting the Shroud of Turin at its last public exhibition in 2015. The methodology considered the special requirements of the Shroud, including exposure to ultraviolet light, while providing appropriate display conditions that would meet audience expectations. The desired appearance (readability of the body image and color) was defined with the help of Shroud researchers and confirmed by subjective tests, while appropriate light levels for preservation were set in agreement with standard requirements and using knowledge of the degradation of linen in visible and UV light. The installation provided a controlled environment and a managed visitor route to the Shroud, assuring excellent perception of both details and color, with the lowest illuminance level about 15?lx.     

公共图书馆转型背景下的噪音问题——基于微博的调查

文章以用户在微博上发表的对公共图书馆噪音的看法为数据来源,使用内容分析和情感分析方法研究用户对噪音的认知,分析噪音的来源。研究发现:用户对公共图书馆的噪音问题表示关注和不满;大城市公共图书馆被用户提及最多;用户认为安静才是公共图书馆的应有之义;在用户认为的噪音来源中,用户因素远高于其他因素,最主要的噪音源是少年儿童吵闹。对策包括:转变用户对公共图书馆严肃安静的刻板印象;依据用户需求合理规划空间;改进馆内管理工作。     

关于学习控制的定量分析

本文根据著名教育技术学家瑞奇鲁斯 (C .M .Reigeluth)的影响学习控制的主要因素 ,将其进行量化处理 ,并设计出相应的计算公式 ,然后根据学习控制定量分析调查结果 ,计算学习控制的量化数据 ,利用定量分析的方法 ,指导教师制定和实施相应的教学策略。