共查询到20条相似文献，搜索用时 15 毫秒
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介绍作者引用认同和作者引证形象的概念,提炼作者引用认同和作者引证形象的特征,并与传统的作者被引分析进行比较;从狭义和广义上介绍期刊引用认同和期刊引证形象的概念,构建期刊引用认同和期刊引证形象的指标体系;界定机构引用认同和机构引证形象的概念和特征;提出引用认同和引证形象的分析角度。 相似文献
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Janice E. Cox 《资料收集管理》2013,38(3):219-234
This study, conducted at the Indiana University School of Dentistry Library using citation analysis, examined graduate dental student theses citations to determine the nature of materials cited, journal ownership, journal citation frequency, and citation age distribution. The results were compared to other scientific discipline citation analyses. Study results indicated that for the period studied, masters dental students, like medical and science students, cited recently published scholarly dental journal literature. The majority of the journals cited were owned by Indiana University system libraries. Areas for further research include faculty resource usage, e-journal impact, and interdisciplinary resource use. 相似文献
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[目的/意义]探索中文学术期刊论文的引文模式及时间窗口的选择对引文模式的影响，建立引文模式的分析框架。[方法/过程]以2006-2008年出版的图书情报领域期刊论文作为研究对象，采用两步聚类法对单篇论文在7年内的绝对被引量与相对被引量进行聚类分析，研究论文主要特征因子与引文模式的相关性。[结果/结论]在绝对被引量视角下，期刊论文均表现为先上升后下降的经典引文模式；在相对下载量视角下，期刊论文共有6种引文模式，其中3种可以归纳为经典引文模式，另外3种分别为"类睡美人型"、正偏型和马拉松型。相对被引量视角下，首年被引量与总被引量呈现了中等甚至较强的相关性，并且平均被引量越高，相关性越强，绝对被引量视角下的结果正好相反。结果表明，期刊论文的初始被引量与总被引量的相关性高低主要取决于引文曲线的峰度而非总被引量的大小。 相似文献
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《编辑学报》2001-2005年引文分析 总被引：9，自引：0，他引：9
对2001-2005年<编辑学报>的引文进行统计和分析.对引文量、引文率及平均引文率、引文的语种、引文的类型及分布、引文的自引及自引率和引文的时间进行了详细统计.这从引文研究的角度为该刊提供了可靠的数据,可供该刊的发展研究参考,同时可促使其作者更好地著录参考文献. 相似文献
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SCI的引文统计指标及其与研究评价的关系 总被引：16，自引：1，他引：15
从引证类型和检索系统统计源期刊组成分析SCI的引文统计数据及相关指标与期刊和论文学术水平间的不对应关系，并从引文统计时段、论文类型和期刊大小等方面探讨影响因子本身的不确定性；通过分析中国科技期刊的被引情况指出SCI中引文数据的统计错误。认为在我国的科研成果和学术期刊评价中，一定要具体分析SCI的统计数据，适度、合理地使用引证分析方法。 相似文献
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《The Journal of Academic Librarianship》2017,43(5):434-442
This study uses citation data and survey data for 55 library and information science journals to identify three factors underlying a set of 11 journal ranking metrics (six citation metrics and five stated preference metrics). The three factors—three composite rankings—represent (1) the citation impact of a typical article, (2) subjective reputation, and (3) the citation impact of the journal as a whole (all articles combined). Together, they account for 77% of the common variance within the set of 11 metrics. Older journals (those founded before 1953) and nonprofit journals tend to have high reputation scores relative to their citation impact. Unlike previous research, this investigation shows no clear evidence of a distinction between the journals of greatest importance to scholars and those of greatest importance to practitioners. Neither group's subjective journal rankings are closely related to citation impact. 相似文献
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随着交叉科学研究在促进社会发展重大综合性问题解决方面的优势逐渐凸显,越来越多的国家对交叉科学研究给予高度的重视与支持,如何对交叉科学的研究成果进行有效的鉴定与评估也成为科技管理部门亟待解决的重要问题。本文在传统引文指标的基础上,引入PLoS官方平台的使用数据(html浏览、xml下载及pdf下载)作为补充,综合评价交叉科学研究成果的影响力情况。以2009-2013年发表在开源期刊PLoS Computational Biology的研究论文为例,研究结果表明:(1)学科交叉水平与论文影响力之间存在一定的正向关系,学科交叉水平高的论文,对应的使用数据与引用数据要明显高于学科交叉水平较低的论文;(2)论文的使用数据与引用数据相互促进,在引用数据达到峰值时,对应的使用数据也会随之出现一定的回升;(3)学科交叉程度对使用数据与引用数据之间的相关关系也有较为显著的影响。本文从使用数据和引用数据两个维度探索交叉科学研究成果的影响力,为当前交叉科学研究成果影响力的评价提供了新的借鉴与参考。 相似文献
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Michelle Hendley 《Behavioral & Social Sciences Librarian》2013,32(2):96-111
The goal of this analysis was to obtain local citation behavior data on undergraduates researching history, political science, and sociology papers. The study found that students cited books and journals even with the availability of web sources; however, usage varied by subject. References to specific websites' domains also varied across subject area. Most of the top journal titles that students referenced were online and locally owned. Students cited a broader range of journal titles than predicted by the Law of Scattering and cited titles across a wide array of subject areas. This data helped identify potential gaps in the library's collection and services. 相似文献
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期刊学术影响力、期刊对稿件的录用标准和期刊载文的学术影响力三者之间存在同向加强的机制,来自较高影响力期刊的引用具有较高的评价意义。作者的择刊引用和择刊发表使得较低学术影响力的期刊较少被较高影响力期刊引用。因而,可以通过同时考察构成期刊引证形象的施引期刊的学术影响力及其施引频次来评价被引期刊的学术影响力。以综合性期刊Nature和Science 2010年的引证形象为例,将期刊影响因子作为学术影响力的初评结果,提出了以施引频次对施引期刊影响因子加权的计算方法,以期通过量化的引证形象实现对期刊的评价。 相似文献
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Nicole C. Eva 《Journal of Business & Finance Librarianship》2013,18(1):38-48
This article investigates the importance of journal titles in the area of Management and Economics at the University of Lethbridge in southern Alberta, Canada. Not wanting to rely solely on usage data, the author undertook a citation analysis to see which journals were most frequently published in by the university's authors. The results showed that usage data does not tell the whole story when it comes to a journal's importance to an institution. The analysis also illuminated publishers providing journals which were most frequently used. 相似文献
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[目的/意义] 针对60年间作者引用行为演变的分析,了解引文评价的局限性,促进学术论文评价方法的发展和完善。[方法/过程] 通过对1957-2017年物理学和哲学代表性期刊的280篇论文的3 314条参考文献和5 222次引文进行识别,判断和统计其在不同年代的引用特征,并讨论引用行为的演变趋势对引文评价的可能影响。[结果/结论] 通过调查发现如下结论：一是期刊论文在参考文献载体类型和年代分布上没有明显变化,但在篇均参考文献量、参考文献文内平均被引用次数、论文的引用认同和引用深度等方面存在明显变化趋势;二是引用行为的变化,使得引文分析作为学术论文评价的依据受到质疑。论文篇均参考文献量的增长以及深度引用与负面引用比重的下降,使得引文评价的参考性减弱。 相似文献
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[目的/意义] 鉴于Scopus、Web of Science(WoS)与Google Scholar(GS)3个单源数据库在计量学研究和应用中的局限,发展综合利用多源数据信息的复合型引文分析方法可为计量学分析提供一种补充思路。[方法/过程] 以期刊总被引次数这一底层参量为切入点,用图书情报学国际期刊2009-2014年数据为实证基础,尝试对多源数据复合引文算术均值、几何均值及调和均值方法进行比较讨论。[结果/结论] 结果发现,算术均值、几何均值和调和均值虽有差异,但亦有线性关联,应用中可选其一;累计算术均值、几何均值和调和均值与期刊数之间未证实存在布拉德福定律,但在期刊数量等同的三分区内,累计被引均值满足形如n2:n:1的经验分布;多源数据复合引文与单个数据库引文的期刊排名差异呈现"两端小、中间大"之现象;期刊的算术均值排名与GS排名结果更接近,几何均值排名则与Scopus相似度更高,而调和均值与WoS的排名差异最小。 相似文献
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[目的/意义]科研评价中,短时间引文窗口下的学科标准化指标往往是不可靠的,因为这时论文发表的时间较短,还没有充足的时间获取被引次数.然而,各种标准化方法本身并不能解决这一问题.研究旨在解决这一科研评价中的难题.[方法/过程]研究引入一个权重因素以表示每篇论文标准分的可靠程度,权重由论文在给定的短时间窗口下的被引次数与长... 相似文献
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《Journal of Informetrics》2014,8(1):175-180
The findings of Bornmann, Leydesdorff, and Wang (2013b) revealed that the consideration of journal impact improves the prediction of long-term citation impact. This paper further explores the possibility of improving citation impact measurements on the base of a short citation window by the consideration of journal impact and other variables, such as the number of authors, the number of cited references, and the number of pages. The dataset contains 475,391 journal papers published in 1980 and indexed in Web of Science (WoS, Thomson Reuters), and all annual citation counts (from 1980 to 2010) for these papers. As an indicator of citation impact, we used percentiles of citations calculated using the approach of Hazen (1914). Our results show that citation impact measurement can really be improved: If factors generally influencing citation impact are considered in the statistical analysis, the explained variance in the long-term citation impact can be much increased. However, this increase is only visible when using the years shortly after publication but not when using later years. 相似文献
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[目的/意义]对引文分析领域的研究与创新进行回顾和展望。[方法/过程]运用隐喻思维方法,以"科学睡美人"和第二代期刊评价指标（EF和SJR）的创设为例,对引文分析领域取得的主要研究进展进行说明;同时,通过对生态学相关研究文献的调研分析,提出将生态学原理引入到未来引文分析研究中来,形成一个新的研究方向——引文生态学,并就若干重要研究议题进行简要说明。[结果/结论]隐喻思维方法在学术研究及方法论创新中具有重要作用,引文生态学的提出对引文分析领域的理论完善和应用创新具有重要价值。 相似文献
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《Journal of Informetrics》2022,16(1):101241
Usage of field-normalized citation scores is a bibliometric standard. Different methods for field-normalization are in use, but also the choice of field-classification system determines the resulting field-normalized citation scores. Using Web of Science data, we calculated field-normalized citation scores using the same formula but different field-classification systems to answer the question if the resulting scores are different or similar. Six field-classification systems were used: three based on citation relations, one on semantic similarity scores (i.e., a topical relatedness measure), one on journal sets, and one on intellectual classifications. Systems based on journal sets and intellectual classifications agree on at least the moderate level. Two out of the three sets based on citation relations also agree on at least the moderate level. Larger differences were observed for the third data set based on citation relations and semantic similarity scores. The main policy implication is that normalized citation impact scores or rankings based on them should not be compared without deeper knowledge of the classification systems that were used to derive these values or rankings. 相似文献