关键词: ESI学科排名, 评价指标, 累计综合影响力(TVF), 年度新增影响力(VF(t)), 异化, 过度自引

Abstract:

This paper chooses 20 institutions whose discipline of material science has ranked the top 1% of ESI and divides their articles into P1 and P2 according to whether the author affiliation is the major one. It evaluates the degree of excessive selfcitation through a comparative analysis of selfcitations proportion of P1 and P2, thus discover the alienation of ESI discipline ranking indicator. Such alienation is due to excessive selfcitations, for there is generally excessive selfcitations among institutions, especially those with a low average other citations. Based on excluding selfcitations and considering whether the author affiliation is the major one, the paper design new indicators: accumulated comprehensive influence (TVF) and indicator VF(t), which can reflect both the quantity and quality of the cited articles. And then this paper makes an empirical analysis of Pearson correlation of such indicators as TVF, total citations, total other citations, average other citations, H index of the cited article and the number of other citations of other cited literatures. Excessive selfcitations lead to the loss of indicator value in total citation, and there are no obvious correlations between average other citations, hindex and total citations，which cannot reflect the quality of either the paper or the cited articles. There exist strong Pearson correlations between average other citations, hindex and TVF, showing that the new index corrects the alienation of ESI discipline ranking indicator to a certain degree.

Key words: ESI discipline ranking, Evaluation indicators, Accumulated comprehensive impact(TVF), Yearly new impact(VF(t)), Alienation, Excessive selfcitations