文献类型：期刊文献

中文题名：期刊影响因子:一个与引文高峰期相左的指标

英文题名：Impact Factor of Journal: A Conflict Index of the Peak of Citation

作者：蒋鸿标[1]

机构：[1]广东海洋大学图书馆,广东湛江524088

年份：2014

卷号：37

期号：6

起止页码：50

中文期刊名：情报理论与实践

外文期刊名：Information Studies:Theory & Application

收录：CSTPCD、、北大核心2011、国家哲学社会科学学术期刊数据库、CSSCI2014_2016、北大核心、CSSCI

语种：中文

中文关键词：影响因子;引文高峰期;期刊

外文关键词：impact factor; peak of citation; journal

中文摘要：美国情报学家加菲尔德提出的期刊影响因子概念,是基于美国计量学家普赖斯论证的文献被引高峰期为文献出版后的两年的结论,但出版后的两年是否包括出版当年存在不同的理解。而影响因子计算公式中的分子所表述的"两年"是指文章发表的两年,不是文章被引用的两年;分母也不是一年发表文章的总和,而是两年发表文章的总和,这与引文高峰期的"两年"是不同的概念,为什么是两年也没有令人信服的答案。通过对我国图书情报类核心期刊发文与被引证关系的研究,将期刊影响因子的计算公式修正为:现年影响因子=三年前发表的文章在三年内的被引总次数/三年前发表文章的总和。

外文摘要：The concept of journal impact factor, which is proposed by the U.S. intelligence expert E. Garfield, is based on the conclusion that proved by the U.S. metrologist D.S. Price, namely, the peak of citation of literatures is in the two years after the publication. However, there are different understandings of whether the two years of publication contains the current year of publishing or not. The ＂two years＂ that numerator represents in the calculation formula of impact factor refers to the two years of publishing, not the two years of citing. The denominator is the total number of publishing in two years instead of one year, which is the different concept with the ＂two years＂ of the peak of citation. Therefore, there is no convincing answer for why it is two years. On the basis of the research on the relationship between the publications and citations of Chinese core LIS journals, the paper revises the calculation formula of journals impact factor as ： the impact factor for current year = all citations during 3 years to articles published in 3 years ago/divided by/all articles published in 3 years ago.