【摘 要】
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The scaling behaviour of fluctuation for a download network we investigated a few years ago based upon Zhangs Econophysics web page is presented.A power law sca
【机 构】
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Department of Electronic Engineering,School of Information Science and Technology,East China Normal
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The scaling behaviour of fluctuation for a download network we investigated a few years ago based upon Zhangs Econophysics web page is presented.A power law scaling,namely σ～α exists between the dispersion σ and average flux of the download rates.The fluctuation exponent α is neither 1/2 nor 1,which were claimed as two universal fluctuation classes in previous publication,while it varies from 1/2 to 1 with the time window in which the download data are accumulated.The crossover behaviour of fluctuation exponents can be qualitatively understood by the exteal driving fluctuation model for a small-size system or a network traffic model which suggests congestion as the origin.
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