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1.
[目的/意义]探讨论文被引量与下载量之间的关系,对论文影响力评价有重要的意义。[方法/过程]通过CNKI数据库,以《中文核心期刊要目总览》中理工农医类及经济、历史、法律、哲学类期刊2006年刊载的55 000多篇论文为基础,分析不同类论文的被引量分布特征,比较同被引量论文的下载量以及相近下载量论文的平均被引量,采用Spearman相关性方法计算不同类论文下载量、被引量的等级相关系数。[结果/结论]不同类论文的被引量分布具有一致趋势:随被引量的增多论文数比例较快地减小直至为0,相应的被引量分布可以由指数衰减函数近似函数表征。在绝对数量上,论文的下载量、被引量存在较大差别,二者之间的相关性不明显,与下载、被引的自身特征以及各类论文的文献使用特征有关。Spearman等级相关分析表明,论文层级上,下载量、被引量的等级相关性较强,某一篇论文在一定时期内的下载量可以依靠其排序位数预测其统计意义上的被引排序数,可以为论文评价提供参考。 相似文献
2.
《Research Policy》2022,51(4):104484
Although citations are widely used to measure the influence of scientific works, research shows that many citations serve rhetorical functions and reflect little-to-no influence on the citing authors. If highly cited papers disproportionately attract rhetorical citations then their citation counts may reflect rhetorical usefulness more than influence. Alternatively, researchers may perceive highly cited papers to be of higher quality and invest more effort into reading them, leading to disproportionately substantive citations. We test these arguments using data on 17,154 randomly sampled citations collected via surveys from 9,380 corresponding authors in 15 fields. We find that most citations (54%) had little-to-no influence on the citing authors. However, citations to the most highly cited papers were 2–3 times more likely to denote substantial influence. Experimental and correlational data show a key mechanism: displaying low citation counts lowers perceptions of a paper's quality, and papers with poor perceived quality are read more superficially. The results suggest that higher citation counts lead to more meaningful engagement from readers and, consequently, the most highly cited papers influence the research frontier much more than their raw citation counts imply. 相似文献
3.
本次研究在P指数基础上，提出了时间——引文分布下学者学术评价Py指数。具体而言，基于文献引文分布，结合文献被引频次阈值、文献被引半衰期阈值，构建时间——引文分布下的论文分区，即普通论文、潜力论文、热门论文、经典论文。根据4种分区论文影响力差异性，按照普通论文、潜力论文、热门论文、经典论文影响力递增原则，设计论文被引频次递增权值，提出Py公式。以CNKI平台2000-2017年图情领域核心论文被引频次前100位作者数据进行实证分析，讨论Py指数表现。结果表明：Py指数能从论文本身的价值与影响去反映学者的学术成就，凸显优质论文相比普通论文所带来的更强的学术肯定意义；Py指数区分度、灵敏度、公平公正性、有效性与科学性方面较H指数、P指数表现更佳。 相似文献
4.
《情报科学》2006-2010年高被引论文分析 总被引：1，自引：0，他引：1
以中国知网《中国学术文献网络出版总库》为统计源,从文献引证的角度分析《情报科学》高被引论文的分布规律。研究结果表明:该数据库共收录《情报科学》2006-2010年原文2039篇,被引文献1377篇,被引率为67.53%,总被引频次为7581,单篇最高被引频次81,较少的论文拥有较高的被引频次,基本符合"二八定律"。并且以被引频次≥21的前50篇论文作为研究对象,对其年代分布、被引频次、下载频次等方面进行了统计分析。 相似文献
5.
This paper looks at how citations are perceived among scientists. Based on a questionnaire survey it traces the repertoire of views and experiences about citations that could be found among Norwegian scientists that had published highly cited papers. Their views circle around three issues: the relation between the quality (or importance or significance) of a paper and its citation history; the importance of visibility and how different sorts of factors play a role in determining citation in general and high citation in particular; and the fairness (or lack of fairness) of the system. Taken together, the respondents’ answers and comments offer an informal (and fragmented) sociology of citations and their role in the world of science. In the final section we discuss the relevance of our findings in respect to the increasing use of citation indicators in science policy and research evaluations. 相似文献
6.
[目的/意义]探索论文被引次数是否和论文内容即概念组合方式有关。[方法/过程]选取WoS数据库中的免疫学科,抽取其中高、中、低被引频次三种论文集合的主题词,分析各集合主题词频次分布的集中离散趋势。分别构建主题词共现网络,通过网络拓扑属性的分析,了解三种论文集合在概念组合方式上的异同,衡量非典型组合与新颖性的关系。[结果/结论](1)不同被引频次的文献集合在主题类型的分布和主题词分散程度上有较大差异。(2)高被引和中被引论文集的主题词共现网络具有小世界性,低被引论文集的主题词网络不具有小世界性。(3)高被引论文集的主题词共现网络比较紧密,且主题词非典型组合的比例要高于其他两种论文集。低被引论文集的主题词网络比较松散。论文的被引次数与其主题热度、主题之间联系密切程度以及主题之间组合方式相关。 相似文献
7.
[目的/意义]旨在研究引文分析中引入情感分析后对论文排名的影响。[方法/过程]提出一种引文情感分析方法,确定引文文本中的情绪,并使用监督分类器为每个文本句分配一个分数来确定其情感倾向,利用C4.5决策树对引文的极性进行分类;提出一个考虑定量(引用次数)和定性(情感分析)因素的论文评价指数pc指数,并基于该指数对论文进行了排名。[结果/结论]C4.5决策树对引文的极性进行分类,获得了较为准确的结果;pc指数对朴素算法进行改进后获得了对被引论文的影响力新的排名,排名对于较小的语料库影响不大(只有4篇论文排名发生了变化),而对于更大的语料库,预计影响会更大。 相似文献
8.
Citation rates are becoming increasingly important in judging the research quality of journals, institutions and departments, and individual faculty. This paper looks at the pattern of citations across different management science journals and over time. A stochastic model is proposed which views the generating mechanism of citations as a gamma mixture of Poisson processes generating overall a negative binomial distribution. This is tested empirically with a large sample of papers published in 1990 from six management science journals and found to fit well. The model is extended to include obsolescence, i.e., that the citation rate for a paper varies over its cited lifetime. This leads to the additional citations distribution which shows that future citations are a linear function of past citations with a time-dependent and decreasing slope. This is also verified empirically in a way that allows different obsolescence functions to be fitted to the data. Conclusions concerning the predictability of future citations, and future research in this area are discussed. 相似文献
9.
用文献计量学评价基础研究的几项指标探讨--论文、引文和期刊影响因子 总被引：26，自引：2，他引：24
近年来,在基础研究评估的诸多指标体系中,无一例外地引进了文献计量学的方法,其中论文、引文和期刊影响因子又被作为重要指标考虑因子之一。高影响因子的期刊是由于有一定数量的高质量论文支撑的结果,正是这些高质量的论文,才可能产生高水平的期刊,亦即期刊影响因子高。同一学科领域内高水平的期刊一定有多于一般水平期刊的高质量论文。引文是衡量论文影响力的重要因子之一。尽管引文情况复杂,有自引、他引、正引、反引、大段引用,点到而已;并且受学科、期刊数、从事人员多少等影响,也还有创新被认识等问题,但引文的重要性是客观存在的。 相似文献
10.
Darshak PatelMichael R. Ward 《Research Policy》2011,40(6):886-894
We propose an empirical strategy to estimate competition in innovation markets. Our method relates firms’ market return on equity to information about patent citation patterns. Two innovations are implemented in the methodology. First is the application of daily abnormal stock returns rather than annual measures of Tobin's q. Second is the creation of citation patterns related to the area of science a firm patents in as represented by the detailed patent classification system. We find that markets positively reward firms when patents are granted. We further find that firm's market value increases when its patent portfolio is cited. We find evidence of competition in innovation markets. The market reacts at the time that the citation occurs and does not anticipate future citations at the time of patenting. Holding this effect constant, we find that citations from patents in the same area of science tend to reduce market value. We interpret these findings as consistent with more citations indicating more valuable intellectual property but citations from competing technologies decreasing it. 相似文献
11.
本文研究了十年间（1996-2005）SCIE论文中国国际科技合著论文的学科分布差异。通过对论文数量和引文影响的相对水平进行比较,发现在基础研究、工程技术和生物医学三个主要学科大类之间存在明显的差异：基础研究学科论文和引文数量都比较多;工程技术学科论文数多而引文数量相对较少;医学生物学则是论文数量较少而引文数量相对较多。同时,本文还将h指数的概念引入到学科比较中,以学科作为论文产出的主体进行比较分析。同样可以发现三大类学科的差异：基础研究学科h指数普遍较高,工程技术类普遍较低,而医学生物学处于二者之间的地位。 相似文献
12.
朱大明 《中国科技期刊研究》2015,26(11):1161-1165
[目的]重视研究论文中引文的学术论证作用,提高引文质量。[方法]根据引文在研究型论文中所起论证作用不同,将其分为关键论证作用与非关键论证作用2大类,进而提出"关键引文"的概念和标注方法。[结果]关键引文是指在论文中所引用的起到关键性学术论证作用并对论文核心内容具有不可或缺意义的参考文献。提出了关键引文的确定方法和标注方法。[结论]正确认识和把握关键引文,对科学著述中参考文献的合理引用、论文审稿以及引文分析都具有参考指导意义,其有利于促进学术交流质量的提高。 相似文献
13.
本文基于CSSCI数据库,统计分析近十年我国艺术学科高被引作者、高被引期刊频次,并用h指数评价高被引作者学术观点的影响力。统计数据客观显现我国艺术学科近十年期刊和作者高被引现状,引证分析的结果表明,高被引论文与学术影响力的正比关系。在艺术学这门学科中高被引论文表明学术期刊及论文作者的学术影响力。 相似文献
14.
为系统了解国内机构知识库研究现状与趋势,采用文献计量法、比较分析法等,以CSSCI收录的机构知识库来源文献和被引文献数据为基础,从来源文献、引文情况及被引情况3个角度,对载文情况、引文概况、引文语种、引文类型、作者情况、期刊情况、被引情况、被引成果等多个方面进行统计、分析,并通过对这些文献的阅读、关键词分析和国内外有关研究情况的比较,针对国内机构知识库研究的问题,提出了4项建议。 相似文献
15.
链接分析是近些年来国内图书情报学和计算机科学界一个共同关注的研究主题。本文以国内2000-2010年链接分析期刊论文的引文为对象,运用统计方法和比较方法对其进行了定量分析。研究发现,图书情报学和计算机科学链接分析的引文在时间分布、引用文献类型、引文语种等方面都存在较大的差异。本文还分析了两个学科领域的高被引作者和高被引文献。 相似文献
16.
《Research Policy》2019,48(7):1771-1780
Science’s main norms prescribe scientists to use citations as acknowledgements of cognitive content irrespective of geographical location. Previous studies, however, suggested that there is a considerable geographical bias in scientific citations. We argue that this geographical bias does not, in itself, falsify the notion that citations reflect acknowledgement of cognitive content, because cognitively related knowledge may be geographically concentrated as well. We analyse the role of organizational, regional and national co-location on citation likelihood for 5.5 million article pairs, and find that the geographical bias in citations is weak once cognitive relatedness is accounted for. Furthermore, we find that the effect of co-location on citation likelihood is strongest at the organizational level, weaker at the regional level, and weakest at the national level. In addition, we show that geographical co-location particularly increases the citation likelihood between two papers when knowledge relatedness between articles is low, suggesting that interdisciplinary research benefits most from co-location. Finally, we find that, when knowledge relatedness is high, the effect of geographical co-location on citation likelihood is non-existent. We discuss the implications regarding policies aimed to discourage strategic citations and to foster interdisciplinary research. 相似文献
17.
A frequently made claim in the innovation literature is that important inventions involve the transfer of new knowledge from one technological domain to another. This study uses U.S. patents granted from 1976 to 2006 to identify the role of knowledge acquired from outside each patent's technological domain. Our results do not seem to support the claim above. Increasing citations to external prior art is a significantly less important predictor of forward citation frequency than citing prior art that is technologically closer. This result is robust across several model specifications and ways of defining whether each flow of knowledge is external. The result is even stronger in the most highly cited technology categories. We discuss possible explanations for this apparently negative impact of external knowledge—including both measurement issues and challenges associated with assimilating disparate knowledge. 相似文献
18.
[目的/意义]探索国际合作下世界主要国家/地区高被引论文的产出情况及影响力水平。[方法/过程]以2008-2018年ESI中22个学科领域186 474篇高被引论文为基础研究数据，以高被引论文总数排名前10的国家/地区为主要研究对象，对样本国家/地区高水平、高影响力的科技文献产出、产出影响力及合作情况进行分析，重点分析我国进入ESI学科所属高被引文献的国际合作情况及影响力特征。[结果/结论]国际合作对不同国家/地区的科研产出影响不同；国际合作强度与成果产出影响力不存在显著的正相关关系；国际合作对我国大部分学科领域的高被引论文均有积极的正面影响，但部分学科领域国际合作高被引论文的总体影响力却低于我国自主研发高被引论文。 相似文献
19.
关于引文分布和引文效用的调查分析 总被引：1，自引：0，他引：1
由于引文效用不同,因此简单的以被引频次的高低对科技期刊进行学术排名是不够严谨的。选择35种科技学术类期刊,以实验型论文为依据,就引文效用进行了调查分析,结果表明,引文效用与引文在论文中的分布有关,其中正论中的引文具有较高的引文效用,而引言和结论中的引文效用相对较低。 相似文献