加权h指数的定义及图书情报学SSCI期刊在加权h指数下的排名

Ranking of Information Science and Library Science Journals by A Weighted h-Index

h指数,也称为Hirsch指数,是一种经常应用于期刊评价的指标。但此指标也有其明显缺陷。h指数逐年增长,会使一些期刊满足现状,懈怠不前。对于创刊年限不同的期刊,h指数对于年限较短的期刊而言是不公平的。另外,通常认为,不同年份发表的期刊所拥有的引用次数代表不同的影响力,发表得早的文章的引用次数相比新发文章的引用次数具有较小的权重。笔者定义了一种加权h指数,给发表在不同年限的文章赋予不同的权重,计算了JCR中图书馆学信息学类别中期刊的加权h指数,给出了排名,并与JIF(影响因子)的排名进行比较,结果显示两者有密切的相关性,但也有相当大的不同。影响因子在计算时将发表在不同年限的文章的引用次数没有区别对待,这样的评价可能会带来一定的偏差。

The h-index, also known as the Hirsch index, is often used for journal evaluation. However, the h-index has obvious disadvantages. Because the h-index increases annually, some journals that are satisfied with the status quo may slack off, and it is unfair to younger journals. Furthermore, citations of articles that are published in different years have different impacts. Citations of earlier papers are given less weight than more recent papers. In this paper, we define a weighted h-index, which weights articles that are published in different years. We computed journal rankings in the JCR category of information science and library science according to the weighted h-index. We compared this rank to the JIF（journal impact factor） rank. The results show that while the correlations between the ranked lists were high, there were considerable individual differences. The JIF, which treats articles that are published in different years equally, may lead to deviation.