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1.
WoS数据库收录论文文献级别用量指标与被引频次的相关性 总被引：2，自引：2，他引：0
付中静 《中国科技期刊研究》2017,28(1):68-73
【目的】分析Web of Science(WoS)数据库中论文文献级别用量指标（使用次数）与被引频次的分布情况及其相关性,以揭示论文使用与被引的规律及相关关系。【方法】 收集2013～2015年WoS数据库收录信息科学与图书情报学领域被引频次TOP5%、使用次数TOP5%论文数据,分析文献类型,被引频次和使用次数的年度表现及其相关性。【结果】 被引频次TOP5%、使用次数TOP5%以及两者重合文献主要类型均为Article。使用次数（180天）和被引频次三年间差异显著：前者2015年>2014年>2013年（均为P<0.05）,后者表现相反。使用次数（2013年至今）、使用次数（180天）和被引频次弱相关（均为P<0.05）;各年度中除2015年外均有相关性。【结论】 引文时间窗口越长,论文被引频次越高,一定时间内学者们更倾向于使用较新的文献;也揭示了论文使用与被引之间存在的共性,这种共性和引文时间窗口有关。 相似文献
2.
【目的/意义】作者学术影响力评价指标不断推陈出新,但尚缺乏在论文被引离散度层面对作者影响力的评价,本文提出一种综合论文被引频次平均性和均衡性的作者影响力评价指标--Gm指数。【方法/过程】以2009年-2018年图书情报领域发文量最高的20名学者文献数据为样本,采用熵权法确定作者论文被引频次平均性和均衡性的客观权重,计算作者的Gm指数,与h指数、g指数、篇均被引频次进行对比,并从稳定性、区分性和相关性角度讨论Gm指数的评价效果。【结果/结论】结果表明:Gm指数与h指数、g指数、篇均被引频次呈显著相关,与h指数、g指数相比,Gm指数的数据稳定性良好、对作者区分度较高。 相似文献
3.
汪莉 《中国科技期刊研究》2018,29(4):400-405
【目的】 改进现有百分位数指标在揭示期刊载文量特征方面的不足,构建基于被引频次与载文量双重分布的期刊评价指标PRC。【方法】 以2016版《期刊引证报告》生物学学科的85种期刊为研究样本,通过二八定律筛选核心论文样本集,利用布拉德福区域分析法设计基于文献密度分布的载文量权重,利用百分位数建立基于被引频次分布的引文指标,构建期刊综合影响力评价指标PRC。比较PRC与其他文献计量指标的相关性,验证指标评价效果。【结果】 PRC不仅在一定程度上克服了影响因子的内在缺陷,也能合理揭示期刊的出版规模效应,很好地均衡了相对值和绝对值两类指标,改进了百分位数指标的评价效果。【结论】 PRC指标兼顾被引频次和载文量双重分布,从数量和质量两个维度衡量期刊影响力,可用于评价科技期刊的学术影响力。 相似文献
4.
【目的】 对比国内高被引论文在国外的被引情况与国外高被引论文在国内的被引情况,探讨二者的相关性,以了解国内外高被引论文的差异。【方法】 选择2017年《中国科技期刊引证报告(核心版)》医药大学学报类综合评价总分排名前5位的期刊,选取2008—2017年各期刊在CNKI中的高被引论文共512篇及WoS中高被引论文共486篇,统计分析所选文献的被引频次等相关指标。【结果】 5种期刊的CNKI高被引论文的被引频次差异较小,而WoS高被引论文的被引频次差异较大;CNKI高被引论文的被引频次远高于WoS高被引论文的被引频次;除《南方医科大学学报》外,CNKI/WoS高被引论文的被引频次与其在WoS/CNKI中的被引频次的差异不具有统计学意义(P>0.05)。【结论】 我国5种国内学术影响力较高的医药大学学报的国际影响力均较低,这些期刊国内/外高被引论文的被引频次与其在国外/内的被引频次之间的相关性均不明显,国内外对5种期刊的引用存在差异。 相似文献
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【目的/意义】量化学者学术影响力评价指标间的关系和相互联系的紧密程度,并综合评估选取最客观、公
正的评价指标,为评价学者学术影响力提供科学依据。【方法/过程】以CNKI期刊库为数据来源,以竞争情报为检
索词,统计该领域所有学者,并计算被引频次排名靠前的99 位学者的发文量、篇均被引频次、重要论文数、重要论文
被引频次、合作率、h 指数、g 指数、p 指数,利用SPSS22.0 分析各指标之间的关系。【结果/结论】运用不同的评价指标
评价学者学术影响力将得出不同的结论;各评价指标之间存在较多相关性;p 指数在众多指标中更具区分度、灵敏
度以及适用性和可靠性,是一个极具应用前景的评价指标。 相似文献
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7.
《中国科技信息》2017,(10)
【目的】分析以被引次数作为科研评价重要指标的片面性,提出对策建议,以促进国内科研评价工作健康有序发展。【方法】以中国知网为主要数据源,选取部分中文核心期刊文献作为样本,对文献进行分析统计,同时结合部分实例和数据,探讨被引次数评价方法的片面性。【结果】被引次数评价方法的片面性主要表现在以下几个方面:绝大多数情况下被引即为被否定;错误或谬论被引次数偏高;高被引与高不确定性密切相关;综述型论文被引次数高;开辟新领域的论文被引次数高;利益驱使性引用。【结论】不能仅依据被引次数来评价,最好的评价方法是小学科同行评价。另外,国内的学术评价不该仅靠外国的数据库指标,而应更注重中文数据库。 相似文献
8.
【目的】 探究参考文献各指标与论文被引频次之间的关系,为撰写高被引论文、科学评价计量学指标等提供参考。【方法】 以2013年Web of Science中凝聚态物理学科下的12种期刊共计8847篇论文为样本数据,利用负二项回归模型测度了参考文献的4类指标与论文被引频次之间的关系。【结果】 在控制期刊影响因子的前提下,12种期刊的代表时间维度的普赖斯指数都与论文被引频次之间存在显著的正相关关系;在大多数期刊中,参考文献的数量和表征跨学科性的香农指数也对论文的被引频次有显著正影响;而表征论文质量的篇均参考文献被引频次中值与论文被引频次之间的相关关系不明确。【结论】 参考文献的一些指标可能影响论文的被引频次,结合实证结果,对科研工作者合理利用参考文献产出高质量论文提出相应建议。 相似文献
9.
复合开放获取期刊中开放获取论文学术影响力研究 总被引：1，自引：1，他引：0
【目的】探究OA模式是否能给文献带来更高的学术影响力。【方法】 本文引入双胞胎采样法,以Sciencedirect数据库中较高OA论文占比的14种复合OA期刊为研究对象,通过文献学术影响力的分析指标和不同的时间窗口,对OA论文和非OA论文的学术影响力进行对比研究。【结果】 在论文提前出版或者出版当年,OA论文获得比非OA论文更多的被引频次,但在出版后第二年及之后,OA论文在平均被引频次、高被引论文占比等方面的表现与非OA论文的差值渐渐缩小。【结论】 研究表明：（1）OA模式能够给论文带来的学术影响力上的提升在论文出版后的早期确实存在。（2）随着出版后时间的增加,OA论文在学术影响力上的优异表现逐渐弱化,OA论文和非OA论文学术影响力慢慢趋同。 相似文献
10.
【目的】比较学术论文的第一作者和合著者的生产力、影响力与论文发表后被引频次的相关性差异,为期刊编辑初审筛选高被引论文提供一定的参考。【方法】以《编辑学报》和《中国科技期刊研究》2017年发表的484篇论文为研究对象,其中独著论文142篇,合著论文342篇。利用中国知网分别收集所有论文的被引频次,并以论文所有作者2014―2020年的发文量表征作者生产力,以论文作者该时段的h指数表征作者影响力,对484篇论文的第一作者和合著者的生产力、影响力与论文的被引频次的相关性进行统计分析。【结果】独著论文的被引频次与作者生产力无关（r=0.163,P=0.053）,与作者影响力呈正相关（r=0.287,P<0.001）。在合著论文中,论文的被引频次与第一作者生产力、影响力均呈正相关（r=0.195,P<0.001;r=0.320,P<0.001）,与合著者的生产力、影响力也均呈正相关关系（r=0.115,P<0.001;r=0.134,P<0.001）。【结论】无论是独著论文还是合著论文,第一作者和合著者h指数高的论文发表后被引频次高。若合著者发文量较高,论文发表后被... 相似文献
11.
A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
12.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
13.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
14.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
15.
Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
16.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
17.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
19.
Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
20.
Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献