arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1110.2153physics.soc-phcs.DLcs.SIphysics.data-an
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引文动态的表征和建模

Characterizing and modeling citation dynamics

Young-Ho Eom, Santo Fortunato

摘要:

引文分布对于科学家活动的分析和建模至关重要。我们调查了美国物理学会期刊上发表的论文的文献计量学数据,寻找最能描述所观察到的引文分布的函数类型。我们用Kolmogorov-Smirnov统计量的拟合优度对三类函数进行拟合:对数正态函数、简单幂律函数和移位幂律函数。对于我们推导出的所有引文网络,对应于不同的时间跨度,移动幂律被证明是最可靠的假设。我们发现,引用动态的特点是爆发,通常发生在几年内,因为发表的论文,和爆发的大小跨越几个数量级。我们还研究了引文网络演化的微观机制,提出了一个线性偏好连接与时间依赖的初始吸引力。该模型成功地再现了经验的引文分布和帐户的存在,以及引用突发。

英文摘要:

Citation distributions are crucial for the analysis and modeling of the activity of scientists. We investigated bibliometric data of papers published in journals of the American Physical Society, searching for the type of function which best describes the observed citation distributions. We used the goodness of fit with Kolmogorov-Smirnov statistics for three classes of functions: log-normal, simple power law and shifted power law. The shifted power law turns out to be the most reliable hypothesis for all citation networks we derived, which correspond to different time spans. We find that citation dynamics is characterized by bursts, usually occurring within a few years since publication of a paper, and the burst size spans several orders of magnitude. We also investigated the microscopic mechanisms for the evolution of citation networks, by proposing a linear preferential attachment with time dependent initial attractiveness. The model successfully reproduces the empirical citation distributions and accounts for the presence of citation bursts as well.

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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