Multiresolution wavelet analysis (MWA) is a powerful data processing tool that provides a characterization of complex signals over multiple time scales. Typically, the standard deviations of wavelet coefficients are computed depending on the resolution level and such quantities are used as measures for diagnosing different types of system behavior. To enhance the capabilities of this tool, we propose a combination of MWA with detrended fluctuation analysis (DFA) of detail wavelet coefficients. We find that such an MWA&DFA approach is capable of revealing the correlation features of wavelet coefficients in independent ranges of scales, which provide more information about the complex organization of datasets compared to variances or similar statistical measures of the standard MWA. Using this approach, we consider changes in the dynamics of coupled chaotic systems caused by transitions between different types of complex oscillations. We also demonstrate the potential of the MWA&DFA method for characterizing different physiological conditions by analyzing the electrical brain activity in mice.
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April 2021
Research Article|
April 07 2021
Enhanced multiresolution wavelet analysis of complex dynamics in nonlinear systems
A. N. Pavlov
;
A. N. Pavlov
a)
1
Institute of Physics, Saratov State University
, Astrakhanskaya Str. 83, 410012 Saratov, Russia
2
Regional Scientific and Educational Mathematical Center “Mathematics of Future Technologies,”
410012 Saratov, Russia
a)Author to whom correspondence should be addressed: pavlov.alexeyn@gmail.com
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O. N. Pavlova
;
O. N. Pavlova
1
Institute of Physics, Saratov State University
, Astrakhanskaya Str. 83, 410012 Saratov, Russia
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O. V. Semyachkina-Glushkovskaya
;
O. V. Semyachkina-Glushkovskaya
3
Biology Department, Saratov State University
, Astrakhanskaya Str. 83, 410012 Saratov, Russia
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J. Kurths
J. Kurths
3
Biology Department, Saratov State University
, Astrakhanskaya Str. 83, 410012 Saratov, Russia
4
Potsdam Institute for Climate Impact Research
, Telegraphenberg A 31, 14473 Potsdam, Germany
5
Institute of Physics, Humboldt University Berlin
, 12489 Berlin, Germany
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a)Author to whom correspondence should be addressed: pavlov.alexeyn@gmail.com
Note: This paper is part of the Focus Issue, In Memory of Vadim S. Anishchenko: Statistical Physics and Nonlinear Dynamics of Complex Systems.
Chaos 31, 043110 (2021)
Article history
Received:
January 29 2021
Accepted:
March 23 2021
Citation
A. N. Pavlov, O. N. Pavlova, O. V. Semyachkina-Glushkovskaya, J. Kurths; Enhanced multiresolution wavelet analysis of complex dynamics in nonlinear systems. Chaos 1 April 2021; 31 (4): 043110. https://doi.org/10.1063/5.0045859
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