Thesaurus-based automatic book indexing

This paper describes a technique for automatic book indexing. The technique requires a dictionary of terms that are to appear in the index, along with all text strings that count as instances of the term. It also requires that the text be in a form suitable for processing by a text formatter. A program searches the text for each occurrence of a term or its associated strings and creates an entry to the index when either is found. The results of the experimental application to a portion of a book text are presented, including measures of precision and recall, with precision giving the ratio of terms correctly assigned in the automatic process to the total assigned, and recall giving the ratio of correct terms automatically assigned to the total number of term assignments according to a human standard. Results indicate that the technique can be applied successfully, especially for texts that employ a technical vocabulary and where there is a premium on indexing exhaustivity.     

加强科研设计 提高论文质量

医学论文是医学实践的文字总结，而科研设计错误的论文发表后可能会对医学实践产生误导，因此，科学、严谨的试验设计对于论文的结论起着举足轻重的作用。本文分析了目前我国医学论文中科研设计误用现状，探讨了正确的科研设计必须遵循的基本原则，并给科研工作者提出了建议和对策。     

Markov models of book obsolescence

Markov models of declining usage of library books have been described by Morse and by Chen in the context of academic science libraries in the U.S.A. Additional data is presented concerning academic library and public library material in the U.K. An example of the use of Markov models in library planning is reported.     

Closer for Better Future

<正>Scientists from CAS and the Max Planck Society(MPG)met on May 13,2014 in Beijing to celebrate their four-decade-long ST cooperation and cherished friendship,anticipating further development of the bilateral relation.This partnership formally began four decades ago with a visit paid by then MPG President,Prof.Lüst to CAS,introduced CAS President BAI in his address at the celebration:During the visit,CAS and MPG confi rmed the basic principles of cooperation,that is equality and mutual benefi ts for both sides,and reached agreement to develop a collaborative partnership.This occurred only two years after the establishment of the diplomatic relations between Germany and China,despite the shadow of the Cold War.Building up a partnership between Germany and     

浅谈高校图书馆图书流通工作的改革

图书馆流通工作的改革是随着现代电子技术、网络技术的发展而发展。以美国国会图书馆发行MARCⅡ的机读目录为标准,开始了图书馆信息化建设,大致经历了三个阶段,即:初始阶段、发展阶段、高级阶段。本文以这为背景,根据读者需求的转变,汇总了流通工作的改革过程,并侧重说明现阶段改革面临的困境及其对策。     

Toward Making Better Organic Semiconductors

正Organic conjugated polymers have attracted considerable attention from all over the world in the prospect of producing highly efficient,large area,and flexible organic electronics with tunable properties.The potential applications of organic semiconductors include organic field-effect transistors(OFETs),organic bulk heterojunction organic solar cells(OPVs),organic light emitting diodes(OLEDs)and     

为科学服务的大数据

数据驱动的科研活动已蔚为大观,然而厘清关于数据研究的基本问题仍是数据科学的首要任务。文章根据伦敦帝国理工学院建设数据科学研究院的经验,将数据科学聚焦于交叉研究上,讨论从数据整合与理解,到数据感知与交互,再到数据学习与认知,最后到数据交换与经济的完整链条,并结合开展的科研实践工作,分析了其中的基本研究问题。     

基于文本的留言本的设计

随着网络的发展和cn域名的普及,个人网站得到迅速发展。留言本是个人网站的一个重要的功能之一,本文利用JSP技术设计了基于文本的留言本,既可以满足个人网站的需要,又节省了数据库的费用。