共查询到20条相似文献，搜索用时 125 毫秒
1.
周淑霞 《图书馆理论与实践》2010,(6)
通过对影响因子评价学术期刊的科学性和局限性的分析,认为影响因子是评价学术期刊的重要指标.指出在评价学术期刊时,影响因子的客观性、系统性、科学性和实用性已得到了认可,学术期刊要正确运用影响因子,发挥影响因子的客观性和科学性的作用,提高期刊各影响因子指数,以便影响因子更能体现期刊的影响范围,从而更好地、科学地评价期刊,使影响因子成为有利于作者、读者、编辑和期刊的科学评价因素. 相似文献
2.
近年来,期刊影响因子的人为操纵受到学术界广泛关注,期刊过度自引成为人为操纵影响因子的重要手段.期刊自引率是识别影响因子人为操纵的敏感指标,但对小集团内部期刊互引和其他形式人为操纵的识别却无能为力.在该研究中,深度挖掘了自引率、扩散因子、被引半衰期、开放因子和互引指数在期刊影响因子人为操纵识别中的应用. 相似文献
3.
文章以2016JCR中SSCI收录信息科学与图书馆学学科期刊为来源数据,采用Spearman分析2年影响因子百分位、5年影响因子百分位和他引影响因子百分位与WoS数据库其他文献计量学指标、与h指数及累积h指数、与Scopus数据指标的相关度的不同.5年影响因子百分位与WoS数据库计量指标总被引频次、5年影响因子、被引半衰期、论文影响分值、引用半衰期、特征因子和标准特征因子的相关度高于2年影响因子百分位和他引影响因子百分位;5年影响因子百分位与相同引证时间窗口h指数、累积h指数全部表现为最强相关性,与Scopus数据库计量指标CiteScore、SNIP和SJR均表现显著相关性.5年影响因子百分位对期刊的评价效力更高,更适用于期刊的学术评价. 相似文献
4.
近年来我国英文科技期刊发展迅速,但在期刊出版、评价、管理等过程中,唯SCI影响因子的现象越发明显.由于影响因子本身的局限性,唯影响因子在期刊基础设施建设、论文选择与评审、期刊竞争力提升等方面带来严重的不利影响,消除唯SCI影响因子对我国科技期刊发展的危害刻不容缓.不局限于少数指标,让不同类型的期刊都能得到充分发展,这样才能壮大中国科技期刊的整体实力. 相似文献
5.
6.
标准化影响因子在不同学科期刊比较中的应用 总被引：3，自引：0，他引：3
影响因子被用来评价科技期刊、科研人员及科研机构的学术水平,但由于学科间规模、发展速度不同,导致不同学科的期刊拥有不同的半衰期和文献利用规律,因此把影响因子直接用于不同学科间期刊的评价是不公平的.为了避免这种不公平,提出了"标准化影响因子"的概念,它通过对科技期刊的影响因子进行一次非线性转换和线性转换而得到,可以减小影响因子在评价不同学科期刊时的误差. 相似文献
7.
8.
通过对通常使用的期刊评价指标-影响因子的分析,讨论了影响因子存在的问题,对学术期刊评价新指标特征因子、SJR、论文-计数影响因子进行介绍,结合<中文核心要目总览>中期刊评价的实际工作经验,认为应建立学术期刊的综合评价指标体系,并注意定量评价与定性评价相结合. 相似文献
9.
10.
区域创新能力的提高对提升国家整体创新能力,进而促进经济增长与经济的可持续发展具有重要的意义.本文应用因子分析法对我国区域创新的创新能力进行评价与比较分析,通过31个省、直辖市和自治区的样本数据提取出影响我国区域创新能力的4个公因子:人力财力投入产出因子、企业研发能力因子、物质条件因子和企业吸收能力因子;利用各因子得分.通过聚类分析将我国区域划分为5类,为相应区域决策提供依据. 相似文献
11.
采集较大样本量,并引入虚拟变量代表样本期刊是否独家出版,运用相关和回归分析观察独家出版对科技期刊影响因子的影响。相关分析表明,无论是CNKI还是万方独家出版,影响因子与是否独家出版之间均存在显著的负相关性。对包含CNKI独家期刊的数据回归分析显示,虚拟变量前的回归系数虽然为负值但从统计学上看并不显著。对包含万方独家出版的医学期刊的数据回归分析发现,虚拟变量前的系数不仅为负值,而且具有统计学上的显著性,表明万方独家出版引起期刊影响因子降低。结果还显示,若独家出版对影响因子有影响,将非常显著。期刊应慎重考虑是否独家出版。 相似文献
12.
[目的/意义]近年来，热点论文逐渐受到学术界重视，为数不多的研究成果已开始探索热点论文自身的特征，但在影响因素等规律方面的研究工作尚不充分。[方法/过程]本研究利用TF-IDF算法和负二项回归模型，试图探究热点论文的分布特征、影响因素、时间窗口差异和学科类型差异。[结果/结论]研究结果表明，热点论文的分布特征侧重于发达国家、知名研究机构、交叉学科和权威期刊；并且受到精炼的标题、国家间合作、研究型产出、开放获取、高影响因子期刊等因素影响；热点论文存在时间窗口效应，甚至改变了标题、摘要、开放获取等因素影响热点论文的具体轨迹；学科间差异对热点论文具有影响，在标题、摘要、科研合作、文献类型、开放获取、期刊影响因子方面均存在差异。 相似文献
13.
The journal impact factor (JIF) has been questioned considerably during its development in the past half-century because of its inconsistency with scholarly reputation evaluations of scientific journals. This paper proposes a publication delay adjusted impact factor (PDAIF) which takes publication delay into consideration to reduce the negative effect on the quality of the impact factor determination. Based on citation data collected from Journal Citation Reports and publication delay data extracted from the journals’ official websites, the PDAIFs for journals from business-related disciplines are calculated. The results show that PDAIF values are, on average, more than 50% higher than JIF results. Furthermore, journal ranking based on PDAIF shows very high consistency with reputation-based journal rankings. Moreover, based on a case study of journals published by ELSEVIER and INFORMS, we find that PDAIF will bring a greater impact factor increase for journals with longer publication delay because of reducing that negative influence. Finally, insightful and practical suggestions to shorten the publication delay are provided. 相似文献
14.
论文发表时滞与优先数字出版 总被引：1，自引：1，他引：0
将论文发表时滞分为审稿时滞与等待印刷时滞,解释了论文从投稿到发表的过程中各个环节所产生的时滞及其所产生的负面影响。分析优先数字出版在大幅缩短论文发表时滞方面的功能与意义,统计表明,优先数字出版能将期刊影响因子提高约15％。提出了优先数字出版中值得讨论的问题。 相似文献
15.
《Journal of Informetrics》2023,17(1):101370
Elucidating and prejudging the patent technological value (PTV) is an important issue in the field of technology innovation and Patentometrics. However, most studies adopt a static perspective to define and evaluate it according to forward citations (FC), which disregards the time attribute and evolution process and may cause some contradictions or ambiguities among findings. Through combing the time and number attributes of FC, this study recommends a four-dimensional index (technology lifetime, strength, breadth, and dispersion) from the standpoint of patented technology diffusion, a dynamic evolution process. By considering patent data from three technology fields - graphene, information and communication, bio-medicine - as samples, we examine the multidimensional characteristics of PTV and further adopt Cox and multiple regression analysis to determine its influential factors. The finding shows that PTV is multi-dimensional and the four-dimensional index is helpful to explain the differentiation effects of different influential factors. Furthermore, six internal factors (intrinsic and evolutionary) that influence PTV in varying degree are identified and verified. Specially, as for intrinsic factors, only backward citation influences all four-dimensional index with a positive impact on technology lifetime and strength, and negative impact on breadth and dispersion. Technology field can negatively affect strength and breadth, but positively affect dispersion. Delivery term can only affect technology lifetime negatively. As for evolutionary factors, patent legal lifetime influences all four-dimensional index with a negative impact on technology lifetime and strength, and positive impact on breadth and dispersion. Forward citation exerts a positive impact on breadth and strength while a negative impact on technology lifetime and dispersion. Transfer number exerts a positive impact on technology lifetime, but a negative influence on dispersion. This study not only offers a four-dimensional index to signify the technological value of a patent, but construes the contradictions or ambiguities about the relationships between the influential factors and PTV. Besides, the influential factor model is also helpful to prejudge the technological value of patents at different stages after the granting. 相似文献
16.
David Tempest 《Learned Publishing》2005,18(1):57-62
One of the most misunderstood aspects of journal management is the effect of journal title changes on the ThomsonScientific impact factor. This study analyses journals that changed their title in 1994 and 1995 and ascertains the period of time taken to recover the impact factor. Effects of subject classification and of the size of the journal are also investigated to see if recovery time depends on them. The analysis shows that recovery times are longer than predicted. Suggestions are made on how publishers may approach communication of journal title changes to minimize the effects on the impact factor. 相似文献
17.
《Journal of Informetrics》2014,8(2):406-418
The journal impact factor is not comparable among fields of science and social science because of systematic differences in publication and citation behavior across disciplines. In this work, a source normalization of the journal impact factor is proposed. We use the aggregate impact factor of the citing journals as a measure of the citation potential in the journal topic, and we employ this citation potential in the normalization of the journal impact factor to make it comparable between scientific fields. An empirical application comparing some impact indicators with our topic normalized impact factor in a set of 224 journals from four different fields shows that our normalization, using the citation potential in the journal topic, reduces the between-group variance with respect to the within-group variance in a higher proportion than the rest of indicators analyzed. The effect of journal self-citations over the normalization process is also studied. 相似文献
18.
从出版周期、影响因子、稿源数量、质量保证和可持续发展等方面论述了缩短文章刊出时滞对医学期刊的影响,并就其可能带来的负面影响提出了防范措施。 相似文献
19.
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
20.