高维分形和多重分形的去趋势涨落分析
Detrended fluctuation analysis for fractals and multifractals in higher dimensions
摘要:
一维去趋势波动分析(1D DFA)和多重分形去趋势波动分析(1D MF-DFA)因其精度高、易于实现而被广泛应用于分形和多重分形时间序列的标度分析。在本文中,我们推广一维DFA和MF-DFA到高维版本。当测试与合成表面,包括分数布朗表面和多重分形表面的推广工作。采用二维MF-DFA对两幅自然图像和实验图像进行了分析,得到了较好的标度律。
英文摘要:
One-dimensional detrended fluctuation analysis (1D DFA) and multifractal detrended fluctuation analysis (1D MF-DFA) are widely used in the scaling analysis of fractal and multifractal time series because of being accurate and easy to implement. In this paper we generalize the one-dimensional DFA and MF-DFA to higher-dimensional versions. The generalization works well when tested with synthetic surfaces including fractional Brownian surfaces and multifractal surfaces. The two-dimensional MF-DFA is also adopted to analyze two images from nature and experiment and nice scaling laws are unraveled.
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