arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1308.5752physics.soc-phcs.DLphysics.data-an
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Z指数:生产力和影响力的几何表示,反映了整个排名引用概况中的信息

The Z-index: A geometric representation of productivity and impact which accounts for information in the entire rank-citation profile

Alexander M. Petersen, Sauro Succi

摘要:

我们提出了一个简单的推广赫希的h指数,Z = \sqrt{h^{2}+C} / \sqrt{5},其中C是总的引文数。Z旨在纠正h对科学家高引用论文造成的潜在过度惩罚,因为对于大多数分析的科学家来说,我们发现超额引用分数(C-h^{2})/C分布在0.75附近,这意味着作者75%的影响被忽略了。此外,Z对科学家引用概况的局部变化不太敏感,即增加h而仅轻微影响C的扰动。使用476个物理学家职业和488个生物学家职业的真实职业数据,我们分析了$Z$的分布和Z相对于赫希指数h和埃格指数g的排名稳定性。我们分析了分布在广泛的总影响范围内的职业,包括被引用次数最多的物理学家和生物学家,以进行基准比较。在实践中,Z指数需要计算h所需的相同信息,并且可以毫不费力地纳入职业档案数据库,如Google Scholar和ResearcherID。由于Z包含了整个出版物的信息,同时比H和G更强大的局部扰动,我们认为,Z更适合在学术决策的情况下,包括大量的科学家的排名比较。

英文摘要:

We present a simple generalization of Hirsch's h-index, Z = \sqrt{h^{2}+C}/\sqrt{5}, where C is the total number of citations. Z is aimed at correcting the potentially excessive penalty made by h on a scientist's highly cited papers, because for the majority of scientists analyzed, we find the excess citation fraction (C-h^{2})/C to be distributed closely around the value 0.75, meaning that 75 percent of the author's impact is neglected. Additionally, Z is less sensitive to local changes in a scientist's citation profile, namely perturbations which increase h while only marginally affecting C. Using real career data for 476 physicists careers and 488 biologist careers, we analyze both the distribution of $Z$ and the rank stability of Z with respect to the Hirsch index h and the Egghe index g. We analyze careers distributed across a wide range of total impact, including top-cited physicists and biologists for benchmark comparison. In practice, the Z-index requires the same information needed to calculate h and could be effortlessly incorporated within career profile databases, such as Google Scholar and ResearcherID. Because Z incorporates information from the entire publication profile while being more robust than h and g to local perturbations, we argue that Z is better suited for ranking comparisons in academic decision-making scenarios comprising a large number of scientists.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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