Comparing the performance of FA, DFA and DMA using different synthetic long-range correlated time series

YH Shao, GF Gu, ZQ Jiang, WX Zhou, D Sornette - Scientific reports, 2012 - nature.com
YH Shao, GF Gu, ZQ Jiang, WX Zhou, D Sornette
Scientific reports, 2012nature.com
Notwithstanding the significant efforts to develop estimators of long-range correlations (LRC)
and to compare their performance, no clear consensus exists on what is the best method
and under which conditions. In addition, synthetic tests suggest that the performance of LRC
estimators varies when using different generators of LRC time series. Here, we compare the
performances of four estimators [Fluctuation Analysis (FA), Detrended Fluctuation Analysis
(DFA), Backward Detrending Moving Average (BDMA) and Centred Detrending Moving …
Abstract
Notwithstanding the significant efforts to develop estimators of long-range correlations (LRC) and to compare their performance, no clear consensus exists on what is the best method and under which conditions. In addition, synthetic tests suggest that the performance of LRC estimators varies when using different generators of LRC time series. Here, we compare the performances of four estimators [Fluctuation Analysis (FA), Detrended Fluctuation Analysis (DFA), Backward Detrending Moving Average (BDMA) and Centred Detrending Moving Average (CDMA)]. We use three different generators [Fractional Gaussian Noises and two ways of generating Fractional Brownian Motions]. We find that CDMA has the best performance and DFA is only slightly worse in some situations, while FA performs the worst. In addition, CDMA and DFA are less sensitive to the scaling range than FA. Hence, CDMA and DFA remain “The Methods of Choice” in determining the Hurst index of time series.
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