(A.1) Among the first time-frequency-based image watermarking procedures is the approach introduced in [38].
When the signal passes through the first time-frequency analysis, the sampling frequency is larger than the maximal frequency component in the signal.
In the second time-frequency analysis of the centroid curve, the respiration and heartbeat frequencies become separated.
Finally, the centroid curve undergoes a second time-frequency analysis to extract the respiration and heartbeat rates of the individual.
If the sampling frequency of the second time-frequency analysis does not undergo down-sampling, the final time-frequency diagram will exhibit serious distortion.
where Tdur is the signal observation time, and SPWV t, f) is the normalized spectral energy density after the second time-frequency analysis.
Before the second time-frequency analysis is executed, we extracted the centroid curve, which is close to the speed signal of the human body to a certain extent.
Finally, a second time-frequency analysis is applied to the centroid curve to extract the respiration and heartbeat rates of the individual.
Its efficacy is demonstrated for the first time for frequency response of bimodular material laminated cylindrical panels modelled using finite element based on Bert's constitutive model.
The C2H6 molecule has been used to determine experimentally, for the first time, the frequency factor present in the Polanyi Wigner equation and to study how temperature influences this magnitude for a zeroth order desorption.
In this study, we examined for the first time the frequency of anti-DSF70/LEDGFp75 anti-DSF70/LEDGFp75erautoantibodies patinntserath RA, dermatomyositis (DM), and obesity (OB), as well as in Mexican HI.
