Long-range correlations in the electric signals that precede rupture
Long-range correlations in the electric signals that precede rupture
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DOI：
10.1103/physreve.66.011902
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发表时间：
2002-07-01
影响因子：
2.4
通讯作者：
Skordas, ES
中科院分区：
文献类型：
--
作者：
Varotsos, PA;Sarlis, NV;Skordas, ES
将Smoluchowski-Chapman-Kolmogorov泛函方程应用于破裂前的电信号。结果表明，所分析的数据具有非马尔科夫性质。重新调整的幅度赫斯特和去趋势波动分析，以及与“步行者所走的平均距离”相关的分析，导致了幂指数，这与长期相关性的存在是一致的。如果在“自然”的时间域中进行分析(而不是在常规的时间范围内)，那么这些信号的功率谱特性就出现了“普遍性”。在这个框架内，膜通道中离子电流波动的某些功率谱特征似乎将它们与破裂前的电信号区分开来。后者表现出与基于临界点的随机场伊辛哈密顿量的模型的预期行为相容的行为。
The Smoluchowski-Chapman-Kolmogorov functional equation is applied to the electric signals that precede rupture. The results suggest a non-Markovian character of the analyzed data. The rescaled range Hurst and detrended fluctuation analyses, as well as that related with the "mean distance a walker spanned," lead to power-law exponents, which are consistent with the existence of long-range correlations. A "universality" in the power spectrum characteristics of these signals emerges, if an analysis is made (not in the conventional time frame, but) in the "natural" time domain. Within this frame, it seems that certain power spectrum characteristics of ion current fluctuations in membrane channels distinguish them from the electric signals preceding rupture. The latter exhibit a behavior compatible with that expected from a model based on the random field Ising Hamiltonian at the critical point.