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【目的】采用H指数和二八法则基于文献的被引频次来划分出期刊文献的核心区,为科研工作者提供一种把握研究热点的新方法。【方法】以Wo S中收录的84种的图书情报学期刊15592篇文献为研究样本,并采用H指数和二八法则基于文献的被引频次来划分出期刊文献的核心区。【结果】采用二八法则划分文献核心区,其核心区文献量占总文献量为6.12%~48.61%,均值为33.81%;而采用H指数划分文献核心区,其核心区文献量占总文献量为0.56%~26.09%,均值为7.80%。对学科采用二八法则划分文献核心区,其核心区文献量占总文献量80%的文献量为38.05%;采用H指数划分文献核心区,其核心区文献占总文献量为0.67%。核心区文献篇均被引频次为H指数划分大于二八法则划分。【结论】采用H指数划分期刊文献核心区比二八法则更具集中趋势,故而H指数能更好地划分出期刊文献核心区。
【Objective】 The core area of periodical literature is divided by H-index and 28-rule based on the cited times of the literature, which provides a new method for researchers to grasp the research hot spot. 【Method】 The author used 15592 articles of 84 titles of Library and Information Science collected in Wo S as the research sample and classified the core area of the journal literature based on the citation frequency of the articles by H index and 28 laws. 【Result】 By using the law of twenty-eight, the total number of documents in the core area accounted for 6.12% -48.61% with a mean of 33.81%. Using the H index to divide the core area of the document, the core area accounted for the total literature The amount of 0.56% ~ 26.09%, with an average value of 7.80%. For disciplines, the core area of the document is divided by 28 laws, and the volume of the literature in the core area accounts for 80.05% of the total literature volume; the core area of the document is 0.67% by using the H index. Cited articles in the core area are cited times H index divided by more than twenty-eight law division. 【Conclusion】 It is more concentrated that the core index of journal literature is more concentrated than that of the second law by using the H index, so that the H index can better distinguish the core areas of journal literature.