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【目的/意义】谷歌学术近年提出的h5指数受到广泛的关注,研究h5指数的本质及其与影响因子的差异,对于发展和完善学术计量系统是至关重要的。【方法/过程】对比分析了2016年89种英文期刊的h5指数及其对应的JCR影响因子,研究了它们之间的相关性,以及5年总载文量与h5指数的关联,并探讨了h5核心论文发表时间分布和引用频次分布的特征。【结果/结论】研究结果表明,h5指数与影响因子和5年总载文量之间存在正相关性,且前3-4年发表的论文对于h5指数的贡献最为显著。h5指数能够兼顾影响因子和5年总载文量,并能克服影响因子的一些局限性,使其能够更合理、更客观地评价不同学科专业的期刊。
[Purpose / Significance] The h5 index proposed by Google Scholar in recent years has drawn wide attention. Studying the nature of the h5 index and the difference between it and the impact factor is crucial for the development and improvement of the academic measurement system. Methods / Processes The h5 index of 89 English-language journals and their corresponding JCR impact factors were compared and analyzed in 2016, the correlation between them and the correlation between the 5-year total number of documents and the h5 index were explored h5 core papers published time distribution and citation frequency distribution characteristics. [Results / Conclusion] The results show that there is a positive correlation between the h5 index and the impact factor and the total 5-year load, and the papers published in the previous 3-4 years are the most significant contributors to the h5 index. The h5 index, which takes into account both the impact factor and the 5-year total load, overcomes some of the limitations of the impact factor and enables it to evaluate journals of different disciplines more reasonably and objectively.