Results 11 to 20 of about 428,774 (260)
An Experimental and Numerical Study on the Aerodynamic Performance of Vibrating Wind Turbine Blade with Frequency-Domain Method [PDF]
Journal of Applied and Computational Mechanics, 2021 A highly efficient nonlinear frequency-domain solution method is proposed and employed to investigate the aerodynamic and aeromechanical performances of an oscillating wind turbine blade aerofoil in this study. Extensive validations of a frequency-domain
Shine Naung +2 more
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A new positive time-frequency distribution [PDF]
Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002 This article studies the formulation of new members of the Cohen-Posch (1985) class of positive time-frequency energy distributions. Members of this class are always positive functionals and satisfy the marginal constraints. Therefore, they can be properly interpreted as distributions.
Rodríguez Fonollosa, Javier +1 more
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Computationally Efficient Scale Covariant Time-Frequency Distributions
EURASIP Journal on Advances in Signal Processing, 2009 Scale is a physical attribute of a signal which occurs in many natural settings. Time-frequency distributions (TFDs) belonging to Cohen's class are invariant to time and frequency shifts, but are not necessarily covariant to the time scalings of the ...
Selin Aviyente
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Time frequency distributions of TMJ sounds [PDF]
Journal of Oral Rehabilitation, 1991 SummaryFor analysis of time‐varying signals such as the TMJ sounds, it is often desirable to know how the frequency components change with time, using methods of time‐frequency analysis. The aim of this study was to compare two of the most familiar methods for energy density representation with a newly developed technique. The sounds were recorded with
Widmalm, Sven-Erik +2 more
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Hydrological Drought Frequency Analysis in Water Management Using Univariate Distributions
Applied Sciences, 2023 The study of extreme phenomena in hydrology generally involves frequency analysis and a time series analysis. In this article we provide enough mathematics to enable hydrology researchers to apply a wide range of probability distributions in frequency ...
Cristian Gabriel Anghel, Cornel Ilinca
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Sensors, 2018 The aim of this paper is to introduce a new methodology for the fault diagnosis of induction machines working in the transient regime, when time-frequency analysis tools are used.
Jordi Burriel-Valencia +4 more
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On the Symplectic Covariance and Interferences of Time-Frequency Distributions [PDF]
SIAM Journal on Mathematical Analysis, 2018 19 pages, 2 ...
Elena Cordero +3 more
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Massively Multidimensional Diffusion-Relaxation Correlation MRI
Frontiers in Physics, 2022 Diverse approaches such as oscillating gradients, tensor-valued encoding, and diffusion-relaxation correlation have been used to study microstructure and heterogeneity in healthy and pathological biological tissues.
Omar Narvaez +5 more
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Joint time-frequency analysis on space-time-coding digital metasurfaces
JPhys Photonics, 2022 Space-time and time-varying metastructures have attracted a lot of research interest in recent years. On the other hand, digital programmable metasurfaces have also gained great attention owing to their powerful capabilities in controlling ...
Xiao Qing Chen +5 more
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Applied Sciences, 2017 The instantaneous frequency (IF) of a non-stationary signal is usually estimated from a time-frequency distribution (TFD). The IF of heart rate variability (HRV) is an important parameter because the power in a frequency band around the IF can be used ...
Nabeel Ali Khan +2 more
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