Origin of the usefulness of the natural-time representation of complex time series
Origin of the usefulness of the natural-time representation of complex time series
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DOI：
10.1103/physrevlett.94.170601
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发表时间：
2005-05-06
影响因子：
8.6
通讯作者：
Varotsos, PA
中科院分区：
文献类型：
--
作者：
Abe, S;Sarlis, NV;Varotsos, PA
自然时间的概念被证明是有用的，在揭示复杂的时间序列背后的动力学特征，包括心电图，离子电流波动的膜通道，地震电信号，地震事件的相关性。然而，这种经验有用性的起源尚待澄清。在这里，它表明，这个时域实际上是最佳的增强信号在时间-频率空间，采用维格纳函数和测量其本地化属性。
The concept of natural time turned out to be useful in revealing dynamical features behind complex time series including electrocardiograms, ionic current fluctuations of membrane channels, seismic electric signals, and seismic event correlation. However, the origin of this empirical usefulness is yet to be clarified. Here, it is shown that this time domain is in fact optimal for enhancing the signals in time-frequency space by employing the Wigner function and measuring its localization property.