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基于图挖掘的文本主题识别方法研究综述 总被引：1，自引：1，他引：0
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。 相似文献
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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… 相似文献
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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 ,… 相似文献
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国外术语注册与术语服务综述 总被引：1，自引：1，他引：0
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。 相似文献
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基于SOA架构的术语注册和服务系统设计与应用 总被引：5，自引：2，他引：3
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（ServiceOriented 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。 相似文献
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[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。 相似文献
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"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. 相似文献
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“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。 相似文献
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《Slavic & East European Information Resources》2013,14(1-2):123-143
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. 相似文献
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Josie Barnes Parker 《图书馆管理杂志》2013,53(6):731-737
ABSTRACTIn 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. 相似文献
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Jon C. Giullian 《Slavic & East European Information Resources》2013,14(3):278-284
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. 相似文献
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《Slavic & East European Information Resources》2013,14(1):25-74
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. 相似文献
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Neil De Young 《Publishing Research Quarterly》2009,25(3):139-146
Some key questions for publishers in today’s market are: Could Amazon’s recent merger and acquisitions strategy create a disruptive or paradigm shifting business model in the publishing industry? Do their recent actions post mergers and acquisitions illustrate a predicable pattern of behaviour that publishers can strategize around? This paper will explore these questions and look at some of the possible reasons behind Amazon’s business practices and the possible consequences to publishers. 相似文献
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Barbara Lison 《图书馆管理杂志》2013,53(2):180-187
ABSTRACTGerman authorities are expecting more than 1 million refugees by the end of 2015. These people come to Germany to seek protection and assistance and to build a new life, therefore it is important to welcome them and to assist them in their integration as soon as possible. This situation creates a versatile and perfectly fitting opportunity for cultural and educational programs, including libraries, which can play a vital role in this integration process. The key to integration is the knowledge of the German language, and the most important challenge now is to teach the necessary language skills to as many asylum-seekers as possible. 相似文献
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《Journal of Web Librarianship》2013,7(1):41-59
Abstract Many libraries use RSS to syndicate information about their collections to users. A survey of 65 academic libraries revealed their most common use for RSS is to disseminate information about library holdings, such as lists of new acquisitions. Even though typical RSS feeds are ill suited to the task of carrying rich bibliographic metadata, great potential exists for developing applications that can exploit metadata exposed to Web services via RSS. Using the MODS metadata format, entire catalog records can be seamlessly embedded in RSS 2.0 feeds. Existing tools, such as Library of Congress Java toolkits and XSLT stylesheets, can facilitate this process, while a new XSLT stylesheet may be used to create the RSS feeds complete with MODS records. As an example of the added functionality these MODS/RSS feeds can offer, records from a MODS-enriched RSS feed can be ingested into a non-RSS application such as Zotero. As more emerging library technologies use Web services architectures to handle data objects, the ability to syndicate catalog records will become more critical to providing innovative library Web services. 相似文献
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Michelle Rodino-Colocino 《Critical Studies in Media Communication》2013,30(5):375-390
This essay investigates key moments in the history of personal digital assistant (PDA) marketing to women. Analyzing promotional texts for three PDAs that received considerable press coverage from 1999 to 2001, this essay explores the cultural significance of the convergence of anxieties about women's place in the gendered division of labor with the computer industry's changing marketing imperatives. Drawing on an array of promotional texts, including news articles, press releases, promotional Web sites, and ads appearing in newspapers and magazines, this paper tells the story of how the computer industry aimed to sell smaller, faster computing devices to women while promising to mediate and thus reproduce women's overwork as paid and familial laborers. After experimenting with the PDA as a sexy fashionable gadget for working women, marketers approached women as mothers with “Audrey,” an Internet appliance designed for the kitchen. 相似文献
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Lindsay Dillingham 《Journal of Business & Finance Librarianship》2013,18(4):313-327
This study explores the attitudes and actions of bank managers toward communication spending during recession. Results of this study indicate that organizational leaders cut communication spending early during recession and also erroneously rely on the bank's financials to mitigate irrational customer withdrawals. This research is used to illustrate the need for public librarians to meet the needs of bank stakeholders when their institution ceases to communicate during crises, for academic librarians to educate students in undergraduate and graduate programs regarding heightened information needs during recession, and for corporate librarians to understand a potential avenue for competitive advantage during recession. 相似文献
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指出共链分析已在商务网站评价、竞争情报分析、商业信息挖掘等领域有广泛应用。综合运用共链分析与社会网络分析的方法,对国内市场份额排名前50位的电子商务网站的企业竞争态势与竞争关系及地位进行综合分析,并对企业间潜在竞争关系挖掘进行初步探索,以期能对竞争情报方法论研究和国内电子商务市场的发展提供一定的启示和参考。研究发现,共链网络中节点的程度中心性与企业实际的市场份额之间存在显著的相关关系,且竞争关系多存在于不同组织下业务类型相似的企业实体,而有些互补服务的企业之间则是合作关系的存在,这一发现或许能为未来电子商务市场发展战略规划与制定提供一定的指导和帮助。 相似文献