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Power-law distributions in random multiplicative processes with non-Gaussian colored multipliers

机译:非高斯有色乘法器在随机乘法过程中的幂律分布

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摘要

One class of universal mechanisms that generate power-law probability distributions is that of random multiplicative processes. In this paper, we consider a multiplicative Langevin equation driven by non-Gaussian colored multipliers. We analytically derive a formula that relates the power-law exponent to the statistics of the multipliers and numerically confirm its validity using multiplicative noise generated by chaotic dynamical systems and by a two-valued Markov process. We also investigate the relationship between our treatment and the large deviation analysis of time series, and demonstrate the appearance of log-periodic fluctuations superimposed on the power-law distribution due to the non-Gaussian nature of the multipliers. (c) 2006 Elsevier B.V. All rights reserved.
机译:产生幂律概率分布的一类通用机制是随机乘法过程。在本文中,我们考虑由非高斯彩色乘数驱动的可乘Langevin方程。我们通过分析得出一个公式,该公式将幂律指数与乘法器的统计量相关联,并使用由混沌动力学系统和二值马尔可夫过程产生的乘性噪声在数值上确认其有效性。我们还研究了我们的处理与时间序列的大偏差分析之间的关系,并证明了由于乘数的非高斯性质,对数周期波动的出现叠加在幂律分布上。 (c)2006 Elsevier B.V.保留所有权利。

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