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A shielded PVDF Film sensor has been used to obtain the Phonocardiogram (PCG) with high Signal-to-Noise Ratio (SNR). A very simple circuit is good enough to detect the first (S1) and the second (S2) sound of the PCG without using any digital signal processing technique. The mechanical coupling between the sensor and the subject determines the kind of signal detected. The sensor has been mounted on...
We present a data-adaptive regularization method for estimation of line spectra. A Gaussian mixture is used as a suitable prior distribution and a different regularization term is associated to each component of the mixture. The regularized functional is minimized by applying an iterative procedure. The parameters of the mixture as well as the noise variance are updated at each iteration. In this...
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