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1.
王新 《中国科技期刊研究》2017,28(7):647-657
【目的】 分析基础学科期刊论文被引的分布特点,探究低被引论文区间的界定和评价方法。【方法】 以科学引文索引(WoS)收录的65种凝聚态物理学期刊(CMJ)的被引数据为研究对象,以统计学原理和文献计量学方法,比较分析h指数核心区、被引频次小于篇均被引次数论文,以及最低被引论文的累计被引频次为期刊总被引频次的5%,10%和20%区域内论文的被引特性,以此确定CMJ最合理的低被引区。【结果】 CMJ整体零被引率仅为10%,可视为高质量的期刊集合。最低被引论文的累计被引达到总被引频次20%的区域和被引小于篇均被引次数的区域具有被界定为低被引区的统计学依据。零被引率、低被引率和低被引密度与传统评价指标IF、h指数、篇均被引次数以及可被引论文数、总被引频次不存在强相关性,满足作为独立评价指标的充分条件。【结论】 由零被引率、低被引率和低被引密度构成复合指标Evel {rN0,rN x,rTci x}用于描述期刊的低被引特性;由h指数和特定区域内的篇均被引次数构成另一个复合指标Evel {h,Ci 20%,Ci cipp,Ci h}用于比较期刊的被引结构特征。研究表明期刊被引结构可以构形分类,而评价参数在不同被引区域有可能存在竞争优势;因此评价期刊的低被引情况要以分析被引结构为前提。期刊的综合评价应该使用多参数多维度指标。 相似文献
2.
【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
3.
钱爱兵 《中国科技期刊研究》2017,28(10):887-899
【目的】 结合江苏省科技期刊发文、引文、作者、基金项目等元数据,结合被引次数、影响因子、即年指标、文献半衰期与h指数等文献计量学指标,综合分析江苏省科技期刊的学术影响。【方法】 以中国科学技术信息研究所发布的《中国科技期刊引证报告(扩刊版)》(2012—2016年)为原始数据,采用文献计量学的方法,分析比较江苏省科技期刊的发文数量、篇均引文数量、篇均作者、作者地区分布、机构分布、篇均基金项目、论文选出比例、引用期刊数量、总被引次数、他刊引用次数、影响因子、即年指标、被引半衰期、引用半衰期、h指数。【结果】 江苏省科技期刊的学术影响力不断提高,各个期刊在不同指标显示出自己的特点。【结论】 江苏省科技期刊表现出清晰的学术层级性,影响力不均衡。 相似文献
4.
【目的】分析H5指数评价中国材料类SCI期刊的适用性,从而为我国材料学期刊的健康发展,尤其是更好地提高其国内外影响力提供参考。【方法】 以Web of Science（WoS）数据库和Google Scholar Metrics（GSM）数据库收录的14种中国材料类SCI期刊为样本,对H5指数评价中国材料类SCI期刊的适用性进行研究。【结果】H5指数与总被引频次、影响因子（IF）、5年影响因子（IF5）具有很强的相关性,能够从期刊的论文数和总被引频次的角度来评价论文质量与学术影响力,并且兼顾了期刊生产力和影响力。H5指数主要是对期刊的持续影响力进行评估,IF是对期刊近两年影响力进行评估。【结论】合理采用H5指数和IF两种评价体系对我国材料类SCI期刊进行综合评估才相对全面和客观。 相似文献
5.
【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
6.
【目的/意义】作者影响力是学术资源分配、学术人才引进、学术奖励分发的重要指标。为丰富作者影响力
的评价体系,本文提出评价作者影响力的新指标——Iw（Weighted Influence）指数。【方法/过程】在前人研究的基础
上,修正加权被引频次,综合论文数量、署名顺序、发文时间等参数构建 Iw指数。为检验 Iw指数的评估效果,选取
CNKI数据库“图书情报与数字图书馆”研究领域下发文量排名前 40位的作者,计算其 Iw指数,并与 h指数、hc指数
进行对比。【结果/结论】相比 h指数、hc指数,Iw指数对论文数量、署名顺序、加权最高被引频次等敏感度更高,对作
者影响力排名的区分效果更显著,评价结果更全面精细。 相似文献
7.
[目的/意义]针对z指数评价学者学术影响力存在的问题,提出融合引文分析与Altmetrics改进z指数得到znew指数方法,以提高对学者影响力评价的科学性与合理性。[方法/过程]文章融合学术论文被引频次、下载量和期刊影响因子指标,考虑作者贡献度,构建学术论文综合学术影响力综合指标（AC）,以替代z指数评价的基本单元——被引频次（C）单一指标,改进得到znew指数。以图书情报学领域2016—2020年的发文为数据来源,统计获得发文量排名前50位的学者,分别计算他们的znew指数、z指数、p指数、h指数、总发文量N、加权综合学术影响力（AC）、篇均影响力（AC/N）、体现论文影响力分布的一致性指标μ,并实证分析了znew指数评价学者学术影响力的效果。[结果/结论]znew指数在继承z指数优势的基础上,同时也具有自身特有的优势和特点,可较公平和客观地对学者的影响力进行评价。 相似文献
8.
[目的]为丰富期刊学术影响力评价指标体系,提出了一种新的期刊学术影响力评价指标-f(x)指数。[方法]以《中国科技期刊引证报告》2012年期刊目录中的34种图书情报学期刊为例,通过CNKI获取各期刊2012年的载文量、篇被引频次,利用excel、c++计算相应评价指标的得分,并根据f(x)指数的得分对期刊进行排名。[结果]与当年遴选出的CSSCI核心期刊相比,评价结果准确率达94.12%;对各指标进行相关分析,发现f(x)指数与包括影响因子在内的多种期刊评价指标存在较强的正相关。[结论]f(x)指数利用对数函数的性质,考虑了期刊的载文量、总被引、篇均被引等因素,考虑了低被引和高被引论文的差异性,可作为期刊学术影响力评价的指标。 相似文献
9.
【目的】 探讨基于被引频次的sc指数和基于下载频次的sd指数在多学科期刊评价中的应用情况。【方法】 利用中国知网数据库,以2011—2015年理、工、农、医、社会科学五大学科期刊的下载频次和被引频次为基础,构造期刊sd指数与sc指数,比较2011—2015年不同学科样本期刊的sd指数、sc指数的相关性变化情况以及与其他期刊评价指标的关系。【结果】 与h指数相比,s指数更适合综合评价期刊的影响力;2011—2015年理、工、农、医学科样本期刊的sd指数、sc指数相关性高于社会科学,各学科在2013年和2014年相关系数波动较大;除社会科学学科外,2011—2015年其余学科样本期刊的sd指数、sc指数与其他期刊评价指标的相关性相差不大。【结论】 s指数作为期刊评价指标具有一定的合理性;在期刊评价中需要考虑不同时间、不同学科期刊的下载频次和被引频次的关系。 相似文献
10.
翟万银 《中国科技期刊研究》2018,29(12):1183-1191
【目的】 揭示Nature非学术栏目在期刊中的作用及作用方式,以探索我国科技期刊科学办刊途径,从而促进我国科技期刊学术影响力的提高。【方法】 以不同年份出版的4期Nature作为研究对象,分析非学术栏目的构成、文章内容和目标读者,并统计文章的字数、被引频次和自引次数。【结果】 非学术栏目的主要功能是以科普方式宣传、解读学术论文,次要功能是构建Nature的良好生态,而不是凭自身获取被引频次和自引次数来提高期刊影响因子。【结论】 非学术栏目以科普短文形式宣传、解读了Nature的学术论文,我国科技期刊应学习Nature宣传学术论文的方式方法,其中Nature的120 words/180汉字的科普短文宣传法简单有效,易于模仿应用。 相似文献
11.
《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
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.
《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
14.
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
15.
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
16.
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
17.
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
18.
Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
19.
Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
20.
Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献