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arXiv 1004.4824physics.soc-phcond-mat.stat-mechcs.DB
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斯洛文尼亚科学合作网络的增长和结构

Growth and structure of Slovenia's scientific collaboration network

Matjaz Perc

摘要:

我们研究斯洛文尼亚的科学合作网络的演变,从1960年至今,每年的决议。该网络每年都是根据斯洛文尼亚科学家的出版记录构建的,如果两人在给定的一年内共同撰写了至少一篇论文,则将他们联系起来。从1960年不超过30名科学家开始,平均有1.5名合作者,到目前为止,该网络由7380名科学家组成,平均有10.7名合作者。我们表明,尽管广泛的无数的研究领域覆盖,网络形成“小世界”,确实任何对科学家之间的平均路径尺度与规模后,最大的组件变得足够大。此外,我们表明,网络的增长是由近线性的优先附件,从而产生一个对数正态分布的合作者,每个作者,和平均起始年大致成反比的合作者最终获得的数量。可以理解的是,并不是所有早期活跃的组织到现在都聚集了许多合作者。我们还给出了聚类系数和网络直径随时间变化的结果,并将我们的结论与以前报道的结果进行了比较。

英文摘要:

We study the evolution of Slovenia's scientific collaboration network from 1960 till present with a yearly resolution. For each year the network was constructed from publication records of Slovene scientists, whereby two were connected if, up to the given year inclusive, they have coauthored at least one paper together. Starting with no more than 30 scientists with an average of 1.5 collaborators in the year 1960, the network to date consists of 7380 individuals that, on average, have 10.7 collaborators. We show that, in spite of the broad myriad of research fields covered, the networks form "small worlds" and that indeed the average path between any pair of scientists scales logarithmically with size after the largest component becomes large enough. Moreover, we show that the network growth is governed by near-liner preferential attachment, giving rise to a log-normal distribution of collaborators per author, and that the average starting year is roughly inversely proportional to the number of collaborators eventually acquired. Understandably, not all that became active early have till now gathered many collaborators. We also give results for the clustering coefficient and the diameter of the network over time, and compare our conclusions with those reported previously.

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