Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2004-05-19
Chin.Phys.Lett. 21 (2004) 1855-1857
Physics
Condensed Matter
Disordered Systems and Neural Networks
3 pages, 2 figures
Scientific paper
10.1088/0256-307X/21/9/051
The scale-free power-law behavior of the statistics of the download frequency of publications has been, for the first time, reported. The data of the download frequency of publications are taken from a well-constructed web page in the field of economic physics (http://www.unifr.ch/econophysics/). The Zipf-law analysis and the Tsallis entropy method were used to fit the download frequency. It was found that the power-law exponent of rank-ordered frequency distribution is $\gamma \sim 0.38 \pm 0.04$ which is consistent with the power-law exponent $\alpha \sim 3.37 \pm 0.45$ for the cumulated frequency distributions. Preferential attachment model of Barabasi and Albert network has been used to explain the download network.
Cai Xiang-Zhou
Han Dazhong
Liu Jian-Guo
Ma Yong-Ge
Shen Wen-Qing
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