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Your search keyword '"Nonlinear hydrodynamic processes"' showing total 3 results
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3 results on '"Nonlinear hydrodynamic processes"'

1. A Time-- Frequency Application With the Stokes-- Woodward Technique.

Author

Elfouhaily, T., Guignard, S., Branger, H., Thompson, D. R., Chapron, B., and Vandemark, D.

Subjects
*AMPLITUDE modulation, *RADIO frequency, *SIGNALS & signaling, *SURFACE waves (Fluids), *RESEARCH
Abstract

In a recent paper, we have generalized Woodward's theorem and applied it to the case of random signals jointly modulated in amplitude and frequency. This generalization yields a new spectral technique to estimate the amount of energy due to mode coupling without calling for higher order statistics. Two power spectra are detected; the first is related to the independent modes, and the second contains extra energy caused by mode coupling. This detection is now extended from frequency to time-frequency domain. A comparison between a wavelet transform and our time frequency technique shows good agreement along with new insight into the time occurrence of the nonlinearities or mode coupling. An application to water surface waves is given in this letter as an example. [ABSTRACT FROM AUTHOR]

Published
2003
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2. A time-frequency application with the Stokes-Woodward technique

Author

Hubert Branger, Tanos Elfouhaily, B. Chapron, S. Guignard, Douglas Vandemark, Donald R. Thompson, Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Institut universitaire des systèmes thermiques industriels (IUSTI), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), and Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0211 other engineering and technologies, Instantaneous frequency, Higher-order statistics, Vertical asymmetry, 02 engineering and technology, Amplitude modulation frequency modulation, Horizontal asymmetry, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], Amplitude modulation, Optics, 0203 mechanical engineering, wave-wave interaction, [MATH.MATH-MP]Mathematics [math]/Mathematical Physics [math-ph], [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph], Electrical and Electronic Engineering, 021101 geological & geomatics engineering, Coupling, Physics, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Mechanics of the fluids [physics.class-ph], Wind waves, business.industry, nonlinear hydrodynamic processes, Mathematical analysis, Mode coupling, Wavelet transform, instantaneous frequency, Time frequency distributions, mode coupling, time-frequency distributions, Wave wave interaction, AM-FM modulations, horizontal asymmetry, vertical asymmetry, Time–frequency analysis, instantaneous amplitude, 020303 mechanical engineering & transports, Amplitude, AM FM, General Earth and Planetary Sciences, wind-waves, business, Nonlinear hydrodynamic processes, Instantaneous amplitude, Frequency modulation, [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis, Statistics and Probability [physics.data-an]
Abstract

In a recent paper, we have generalized Woodward's theorem and applied it to the case of random signals jointly modulated in amplitude and frequency. This generalization yields a new spectral technique to estimate the amount of energy due to mode coupling without calling for higher order statistics. Two power spectra are detected; the first is related to the independent modes, and the second contains extra energy caused by mode coupling. This detection is now extended from frequency to time-frequency domain. A comparison between a wavelet transform and our time-frequency technique shows good agreement along with new insight into the time occurrence of the nonlinearities or mode coupling. An application to water surface waves is given in this letter as an example.

Published
2003
Full Text
View/download PDF

3. A time-frequency application with the Stokes-Woodward technique

Author

Elfouhaily, Tanos, Guignard, S, Branger, H, Thompson, D, Chapron, Bertrand, Vandemark, D, Elfouhaily, Tanos, Guignard, S, Branger, H, Thompson, D, Chapron, Bertrand, and Vandemark, D

Abstract

In a recent paper, we have generalized Woodward's theorem and applied it to the case of random signals jointly modulated in amplitude and frequency. This generalization yields a new spectral technique to estimate the amount of energy due to mode coupling without calling for higher order statistics. Two power spectra are detected; the first is related to the independent modes, and the second contains extra energy caused by mode coupling. This detection is now extended from frequency to time-frequency domain. A comparison between a wavelet transform and our time-frequency technique shows good agreement along with new insight into the time occurrence of the nonlinearities or mode coupling. An application to water surface waves is given in this letter as an example.

Published
2003
Full Text
View/download PDF

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