Titel: Fractal and Diffusion Entropy Analysis of Time Series: Theory, concepts, applications and computer codes for studying fractal noises and L�vy walk signals
Verlag: VDM Verlag Dr. M�ller
Ver�ffentlichungsdatum: 2010
Sprache: Englisch
ISBN-10: 3639257952
ISBN-13: 9783639257953
Bindung: Softcover
Zustand: New

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Scale invariance has been found to empirically hold for a number of complex systems. The correct evaluation of the scaling exponents of a time series is fundamental to assess the real physical nature of a phenomenon. The traditional methods used to determine these scaling exponents are equivalent because they all rely on the numerical evaluation of the variance. However, two statistical classes of phenomena exist: fractal Brownian motions and L�vy flights and walks. In this book I present the theory and concepts of alternative fractal methods of time series analysis. I introduce a complementary method based on the Shannon entropy: the Diffusion Entropy Analysis (DEA). Using synthetic, solar, geophysical, sociological, physiological and biological data, I examine the properties of these methodologies and discuss the physical ambiguities of the variance-based methods. I argue that the variance-based algorithms should be used together with DEA to properly distinguish fractal Brownian motions from L�vy flight-walk classes of noises and complex processes. Computer C++ codes are provided for generating complex fractal noises and performing multiple fractal analyses of time series.

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Nicola Scafetta, Ph. D.: Studied statistical physics and complex systems at the University of North Texas (USA). Laurea in Physics from the University of Pisa (Italy). Research scientist at Duke University, Durham NC.

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