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arXiv physics/0202070physics.data-ancond-mat.stat-mech
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非平稳时间序列的多重分形去趋势波动分析

Multifractal detrended fluctuation analysis of nonstationary time series

Jan W. Kantelhardt, Stephan A. Zschiegner, Eva Koscielny-Bunde, Armin Bunde, Shlomo Havlin, H. Eugene Stanley

摘要:

本文在去趋势波动分析(DFA)的基础上,提出了一种非平稳时间序列多重分形特征的刻画方法。我们将我们的多重分形DFA方法与标准的基于配分函数的多重分形形式主义联系起来,并证明了这两种方法对于具有紧支撑的平稳信号是等价的。通过对几个实例的分析,表明该方法能够可靠地判定时间序列的多重分形标度行为。通过比较原始序列的多重分形DFA的结果,改组系列,我们可以区分多重分形由于长程相关性,由于一个广泛的概率密度函数。我们还比较了我们的结果与小波变换模极大值(WTMM)的方法,并表明结果是等价的。

英文摘要:

We develop a method for the multifractal characterization of nonstationary time series, which is based on a generalization of the detrended fluctuation analysis (DFA). We relate our multifractal DFA method to the standard partition function-based multifractal formalism, and prove that both approaches are equivalent for stationary signals with compact support. By analyzing several examples we show that the new method can reliably determine the multifractal scaling behavior of time series. By comparing the multifractal DFA results for original series to those for shuffled series we can distinguish multifractality due to long-range correlations from multifractality due to a broad probability density function. We also compare our results with the wavelet transform modulus maxima (WTMM) method, and show that the results are equivalent.

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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