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arXiv 0906.2886physics.plasm-phphysics.flu-dyn
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对数非线性系统中PDF尾部的预测

Predicting PDF tails in systems with logarithmic non-linearity

Johan Anderson, Eun-jin Kim

摘要:

利用模型非线性动力学方程计算了对数非线性系统中通量$R$的概率密度函数。一阶矩通量的PDF尾部解析预测为幂律。这些PDF尾巴被证明是更广泛的比高斯分布,是一种表现形式的短暂的相干结构(瞬子)所造成的不稳定性。

英文摘要:

The probability density function (PDF) of flux $R$ is computed in systems with logarithmic non-linearity using a model non-linear dynamical equation. The PDF tails of the first moment flux are analytically predicted to be power law. These PDF tails are shown to be broader than a Gaussian distribution and are a manifestation of intermittency caused by short lived coherent structures (instantons).

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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