基于图挖掘的文本主题识别方法研究综述

本文通过文献调研分析,将基于图挖掘的文本主题识别方法总结为中心度方法、紧密关联子图查找和图聚类三种,后两者又细分为基于clique子团或类clique子团、基于图拓扑结构或结点属性聚类的方法。中心度方法通过对比文本网络中术语结点的重要度来实现文本主题的识别,紧密关联子图查找和图聚类方法则是根据文本图中术语结点和边的属性相似度来识别文本核心主题。基于语言文本网络自身特性,如何构建复杂文本关系图来同时揭示术语间的句法、共现和语义关系,如何基于术语关联和图拓扑结构识别其中的紧密关联子团,基于何种标准将紧密关联子团聚类以揭示文本核心主题,都是未来需要进一步深入研究的问题。表1。     

程序分频器的预置编码

采用频率合成技术的发射机,只需改变程序分频器的分频数,即改变予置编码．就可以使发射频率改变到用户要求的频率上、使用起来十分方便那么程序分频器的编码如何设置呢？一、分频器的作用在ＰＬＬ电路中,压控振荡器输出的载波频率需取样送鉴相器进行鉴频鉴相为使取样后的射频频率落在鉴相频率上,就需对取样射频进行分频,以便鉴相器迅速捕捉和锁定另一方面,通过改变分频器的分频数来改变频率合成器的工作频率,使ＶＣＯ输出的发射频率符合用户的要求在调频发射机中的分频器,有固定分频器和程序分频器两种,固定分频器位于程序分频器之…     

坐标图中常见错误分析

坐标图能够直观地反映研究结果所揭示的规律 ,从而被各种研究论文所采用。坐标图都是作者自己制作的 ,不像谱图、照片图等是由仪器记录的 ,所以常常出现一些错误。常见的错误如下。1)坐标值与实验值不一致。这种错误单从图上看找不出来 ,只有结合全文才可能发现 ,如图 1。从图所原图题 :引文时差与累计引用频率图 1　横坐标的标值“无序”、缺少实验点并且图示与研究结果不符显示的结果看 ,文献发表后第 14年引用累计频率已达到近 10 0 % ,但原文中的数值这时却为 86 .5 % ,到 18年后才达到 99.9%。文中作者既列出了统计数据又画了坐标图 ,…     

国外术语注册与术语服务综述

本文对国外上最具代表性的三个术语注册与术语服务系统(FAO注册系统与术语服务,OCLC术语服务,Open Metadata Registry)和四个相关研究项目(STAR,HILT,ADL地名表与叙词表协议,PoolParty)进行了详细的调研分析,在此基础上对我国术语注册与术语服务系统的开发与构建提出建议,主要包括:采用新兴的语义网和关联数据技术开发兼具术语注册与术语服务功能的完整系统,提供人与机器对注册词表元数据和词表内容的访问,采用RESTful Web服务构建术语服务,支持以关联数据方式发布词表内容等。图5。表4。参考文献30。     

农业科技论文中几组气象学术语的正确表述

针对目前农业科技论文中气象学术语使用不规范的问题,查阅了农业气象学专著和全国名词委公布的气象学术语,举例分析了农业科技论文中几组气象学术语使用不规范的情况,并指出其正确写法,提出有关建议。     

基于SOA架构的术语注册和服务系统设计与应用

术语注册和服务系统是各种知识组织系统共建共享的重要平台,是网络知识组织系统（NKOS）由理论走向实际应用的关键环节。 通过对国内外术语注册与服务系统及相关研究的调研分析,指出当前我国在术语注册与术语服务方面的研究与应用与国外相比还有较大的差距,提出了一个基于SOA（ServiceOriented Architecture）构建术语注册和服务系统的解决方案。整个系统的架构从上至下分为四层,分别为任务服务层、工具服务层、组件层和数据层。设计的术语注册和服务系统主要支持基于RDF的语义化词表表示格式,并且支持以关联数据的形式显示词表内容数据。此外,本文还详细描述了实现该系统的关键技术,列举了术语注册和术语服务的一些典型应用案例。指出下一步的研究将具体实现一个术语注册和服务原型系统及术语服务客户端,并尝试将客户端程序集成在数字图书馆系统或编目系统中,通过调用术语服务对信息检索和编目提供术语支持。图4。表1。参考文献22。     

数字图书馆的危机

沃尔特·克劳福特是研究图书馆组织(RLG)的高级研究员,《未来图书馆—梦想、疯狂与现实》的作者之一。他曾在 Online 上发表了一篇文章,谈到了全数字化图书馆将会在经济和生态方面带来巨大的弊端,现将他的观点总结如下:1 “数字图书馆”这一术语是否妥当从语言学和实际应用两方面来考虑。这个术语及其相关术语(“虚拟图     

面向叙词表更新的新术语分布特征研究

[目的/意义]为增强叙词表实用性，需要不断地将领域中出现的新术语更新到叙词表中，更新维护过程中，从时间及词频等角度对新术语分布特征进行探索研究，可以为新术语发现方法提供参考。[方法/过程]基于新术语相关特征，结合对应文档频率在时间点和时间段上的发展分布，通过相关统计分析，研究术语在不同成长时期的分布特征，尤其界定术语在开始期与成长期的分布差异。[结果/结论]实证分析表明新术语一般处于术语发展的成长期，当候选新术语保持正向增长趋势超过一定年限，可以认为该术语同时具有新颖性、时间持续性及术语性特征。基于该分布特征进行领域新术语的识别，结合词表编制专家的判断，该方法在新术语收录判断中具有较高的准确率，且能有效识别实际应用中占比较多的低频词。     

法律视野中的"红头文件"

"红头文件"不是一个严格的规范意义的术语,但却是近些年在报纸、杂志、电视、网络等媒体上出现频率较高的一个术语,也是广大群众约定俗成的习惯上的说法.到底"红头文件"概念所指的是什么,有值得辨析的必要.     

法律视野中的“红头文件”

“红头文件”不是一个严格的规范意义的术语,但却是近些年在报纸、杂志、电视、网络等媒体上出现频率较高的一个术语,也是广大群众约定俗成的习惯上的说法。到底“红头文件”概念所指的是什么,有值得辨析的必要。     

British Writings on Romania: From Travel Accounts to Studies

This article surveys a sample of sources of the information about Romania available to British readers in nineteenth century British newspapers and periodicals. It traces first contacts between the Romanian lands and Britain after the union of the principalities of Wallachia and Moldavia in 1859, then after their independence from the Ottoman Empire. The article highlights an increased Romanian interest in British periodicals, which reported and reviewed Romanian literature and scholarship. The article concludes that nineteenth century British newspapers and periodicals offer a great variety and wealth of new material previously unavailable or unknown to researchers. It also states that only a portion of a large quantity of this material has been indexed and is therefore available via the bibliographic sources mentioned in the article. The author argues for the need of a new and updated British-Romanian bibliography, which can draw on new online resources offering access to thousands of new newspapers and periodical records.     

Slavic Approval Plans: What Works and What Doesn't

ABSTRACT

The paper looks at library approval plans for material published in Slavic, East European, and Eurasian countries from the selector's point of view. Reasons why a selector would or would not want one are examined. Success with approval plans requires monitoring receipts, as well as good and ongoing communication among the selector, the acquistions department, and the vendor. A preliminary list of vendors offering approval plans for the countries of the region appears in the appendix.     

由“资源集聚”向“需求导向”转变——对武汉科技信息服务平台建设的思考

为进一步提升武汉科技信息共享服务平台使用效率,本文从平台资源建设、资源应用、供需对接方式和供需特点等方面分析了武汉科技信息资源服务现状;基于需求和利用的角度,结合平台管理实践和走访用户、问卷调查等研究方法,从信息资源需求主体和平台自身建设管理两个维度,找出制约科技资源供需对接的主要因素;以市场化和制度化为创新理念,从政策创新、机制创新、市场化服务、环境营造、人才培养等方面提出平台建设由“资源集聚”向“需求导向”转变的对策建议.     

Periodicals of Ethnic Minorities in Poland

ABSTRACT

The article examines the most important periodicals of ethnic minorities in Poland. After 1989, many ethnic groups (e.g., Germans and Romanies) were allowed to publish journals and newspapers for the first time since the end of World War II. The publications examined show the rich cultural life of the various ethnic groups as well as their current status in Poland. In addition to popular titles, some scholarly publications are also discussed.     

Reference Question Answered: Bibliographic Sources for the Ukrainian Periodical Press in the 1840s: Encyclopedias,Bibliographies, Guides,and Library Catalogs

The author answers a reference question on bibliographic sources for the Ukrainian periodical press 1840–1850. Helpful publications include bibliographies, guides, and library catalogs. These potentially make mention of revolutionary developments in Hungary (such as the Twelve Points paragraph of the Demands of the Hungarian Nation in March 1848, the subsequent April Laws, and Hungary's declaration of independence in April 1949), and elsewhere in the Hapsburg Empire.     

基于文献时间特征的学科主题演化分析方法研究 ——以图书情报学领域为例

在分析文献在不同研究阶段用词时间特征的倾向性基础上,提出一种基于主题模型的研究发展阶段识别方法。重点阐述该方法的构建过程,包括时间特征抽取、发展阶段界定、主题冷热变化分析等步骤。为验证该方法的有效性,针对词频统计法和主题模型方法在主题演化分析中的效果进行比较分析。结果表明,该方法能在识别主题热点和发展趋势的同时,有效地区分不同主题所反映的研究发展阶段。     

Politicking for the Public Library

ABSTRACT

In today's current political environment raising support for millage renewals, bond campaigns or even millage continuations for public libraries is affected by national politics, and a tendency towards tax aversion on principle across the country. The lessons we can learn from the governing boards of small and rural public libraries are worth raising up to a greater national consciousness. Board governance, community consciousness, and facilities management are clear and logical tools that elected boards of public libraries can use to politick for support of libraries.     

Device-Driven Research: The Impact of Chromebooks in American Schools

Chromebooks and the G Suite group of products, like Google Search, Gmail, and Google Docs, have rapidly expanded in American schools during the past 5 years. The impact of one-to-one Chromebook devices and the pervasive use of Google's software products in American education cannot be overstated. This article explores some of the influences of these products on research, based on the experiences of a librarian and technology coordinator at an elementary education level. The author has several suggestions for effective research with these products in mind.     

Authorship,Gender, and Institutional Affiliation in Library History:

Library historians can learn a great deal from studying the gender of authorship and institutional affiliation of a scholarly journal. The focus of this study is to examine these two aspects of journal production in library history to see who is producing published research in this field. Twenty-three years of Libraries & Culture were chosen as the target volumes. The study reveals that more men than women published in library history as well as locating which institutions were represented. This type of information is usedful to the library historian engaged in the analysis of published scholarship, and more generally to scholars with an interest in patterns of literature production in fields closely related to the social and behavioral sciences.     

Architectures of Knowledge and Literary Tradition: A History of the Almanac in Croatia

ABSTRACT

The history of the almanac in Croatia is reconstructed through primary research in bibliographic and archival sources. The almanac is a vehicle for knowledge communication in informal contexts, engaging both oral tradition and literary forms traceable to medieval literacy and ways of structuring knowledge. The history of the almanac in Croatia reflects the changing context of the book trade, literacy, and the evolution of language. Four main stages are identified: (1) the beginning of the annual almanac in the seventeenth century; astrological almanacs reflecting the sensibility of the Baroque period; (2) the Enlightenment's stimulation of almanac publishing in the spirit of contemporary secular reforms in agriculture and education; (3) nineteenth-and twentieth-century almanac trade, showing complex and overlapping networks for the production, distribution and appropriation of printed almanacs;(4) roughly the end of World War II, when the almanac slowly moved out of the role of a popular mass medium and into specialized niches represented by regional, diaspora, and religious almanacs.