摘要
We use multifractal detrended fluctuation analysis （MF-DFA） method to investigate the multifractal behavior of the interevent time series in a modified Olami-Feder-Christensen （OFC） earthquake model on assortative scale-free networks. We determine generalized Hurst exponent and singularity spectrum and find that these fluctuations have multifraetal nature. Comparing the MF-DFA results for the original interevent time series with those for shuffled and surrogate series, we conclude that the origin of multifractality is due to both the broadness of probability density function and long-range correlation.
基金
Supported by Foundation for Outstanding Young and Middle-aged Scientists in Shandong Province under Grant No.BS2011HZ019
State Key Laboratory of Data Analysis and Applications,State Oceanic Administration under Grant No.LDAA-2011-02
the Fundamental Research Funds for the Central Universities under Grant No.201113006
