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[目的/意义]针对P指数不能反映评价对象引文分布的P缺陷,在P指数研究的基础上,提出基于引文分布的指数计算方法。[方法/过程]引入发文-引文分布曲线和学术矩阵表征期刊的引文分布,利用期刊评价的非参数统计方法,通过将引文数据进行分区划分,基于P核和P尾内有引用的论文,采用期刊的平均引文率代表零引用论文的影响,重新定义P指数的计算方法,提出Pnew指数。为避免学科差异对期刊评价的影响,以仅属于Web of Science数据库中电子电气工程类目下有5年影响因子的53种期刊为研究对象,分别统计期刊的影响因子、5年影响因子、H指数、P指数、Pnew指数等指标,并进行相关性及差异性分析,以验证Pnew指数评价的科学性和有效性。[结果/结论]结果表明,Pnew指数与H指数、P指数等多个关键指标的相关性较好。与P指数相比,Pnew指数既延续了其高灵敏度与高区分度的特点,又对P指数相差无几但引用分布大不相同的期刊有更好的显示度和辨识度,而且能够矫正引文分布对P指数评价的偏差。 相似文献
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基于WEB OF SCIENCE的理科学者H指数实证研究 总被引：1，自引：0，他引：1
通过ESI中科学家的Citations排序和CPP排序取交集选出数学、物理、化学、生物、地球科学5个理科学科代表性学者,基于Web of Science(WoS)查出这些学者的累积被引篇数P、被引次数C、篇均被引次数CPP和h指数。分析表明被引篇数P和被引次数C与h指数都有一定相关性;计算表明所有理科学者的h指数落在Hirsch公式和Egghe-Rousseau公式估计值之间,Egghe-Rousseau公式估计值、Hirsch公式估计值和真实h指数之间存在Pearson相关性。 相似文献
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目的:探索出版社学术评估的定量方法.方法:选择维普引文数据库,采用引文计量的方法.对出版社进行引文频次汇总,并按频次进行排序,计算43家出版社的h指数.结果:除了人民卫生出版社的h指数为193.90%的出版社h指数均在50以下.被引频次排名前100位的图书中,人民卫生出版社占62种,其余出版社均在6种以下.结论:h指数可以作为一个评价出版社学术影响力的指标. 相似文献
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针对Z指数不能实现跨学科领域期刊评价的缺陷,文章通过引入学科规范化引文影响力修正不同学科的引用差异,改进Z指数并提出ZCNCI指数。通过分析ZCNCI指数与Z指数、P指数、SNIP、标准化特征因子、影响因子百分位等指标的相关性和差异性,验证ZCNCI指数跨学科期刊评价的效力。结果表明,ZCNCI指数延续了Z指数综合反映期刊数量、质量和被引分布特征的优势,与Z指数、P指数、标准化特征因子的相关性较高,且克服了SNIP、影响因子百分位的评价缺陷,在跨学科期刊评价中的综合表现较好。ZCNCI指数具有跨学科期刊评价效力,可用于跨学科期刊评价。 相似文献
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本文在总结h指数用于机构评价的理论与应用研究的基础上,重点介绍了Prathap和Schubert提出的h2指数的定义及其计算方法,并以1998~2009年"大分子化学"领域Web of Science论文数据为实例,利用自编程序,计算出该领域主要机构的h2指数,并与论文、引文和篇均引文指标得分与排序的相关性进行了比较.数据结论表明:h2指数、论文、引文指标分别从不同的角度描述机构科研绩效的各个侧面;h2指数与论文、引文指标相关性很强,与篇均引文指标关联较弱;h2指数的统计粒度较大,可以用于机构的等级划分. 相似文献
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在学术期刊的计量评价指标体系中,影响因子和总被引频次是2项最为重要的指标,占据了较高的权重;但是,期刊办刊历史长短、发表论文多少、出版周期长短、学科人群多少等都会影响总被引频次的大小.尤其是一些发表大量低水平论文的期刊,依靠论文数量众多,依然可以获得较高的总被引频次;但其影响因子却很低,论文质量很差.如何客观甄别这类论文数量巨大而质量效益不高的期刊？本文提出一个全新的衡量期刊量效关系的指标——期刊量效指数(journal mass index,JMI).“量”指期刊的发文量,“效”则引入期刊影响因子.JMI定义为某刊影响因子与该刊影响因子对应的发文量的比值,意义是平均每篇文献对该刊影响因子的贡献值.JMI能客观反映同一个学科中量大质低的期刊的“臃肿程度”.在《中国学术期刊影响因子年报(2016版)》中,JMI被应用于修正期刊影响力指数(CI)排序,使CI排序更准确地反映学术期刊的学科影响力排名.实践证明,JMI是一个对学术期刊量效关系进行客观评判的有用的计量指标. 相似文献
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学术期刊作为科研论文的重要载体,OA期刊作为一种在线免费取阅、付费发表、经同行评议的学术期刊,其学术质量最为引人关注。文章从引文的角度出发,采用影响因子（IF）百分位数排序、即年指数（lmlnd）百分位数排序、平均IF、平均lmlnd、平均载文量、平均被引频次等指标,对483种生物医学类0A期刊的学术影响力进行了评价研究,并探讨了生物医学与其他学科OA期刊学术影响力的差异。该文为2009年第六期“医学OA期刊”专题文章之一。 相似文献
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周春果 《中国科技资源导刊》2010,42(2)
以CSSCI(1998-2007)为数据源,统计了72种国内经济类期刊的h指数,得出经济类期刊h指数与排名次序的关系符合Powerlaw的结论.结合其他学科h指数分布情况,得出期刊h指数学科差异明显、相当多期刊h指数偏低、经济类期刊h指数较高等结论.并将期刊的h指数排名与基于影响因子等指标的排名进行对比,证明期刊h指教在无干扰情况下是一种性能良好的期刊学术质量衡量指标,同时指出期刊h指数存在容易遭受h指数精确注水等局限性. 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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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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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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《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