in this paper some new applications of empirical mode decomposition (emd) and hilbert spectrum in seismic ground-roll attenuation, random noise attenuation and spectral decomposition are introduced. hilbert spectrum is a time-frequency representation for hilbert-huang transform which is obtained by combination of instantaneous frequency (if) concept and intrinsic mode function of empirical mode...

For the wide frequency spectrum of chaotic signals, it is difficult to realize signal conditioning. Therefore, researchers turn exploration systems with independent non-bifurcation control for easy chaos modification. In this paper, a system only one non-quadratic term modified providing multiscale amplitude/frequency control. By adjusting feedback an odd higher degree term, switchable oscillat...

Nowadays, there is a growing interest in the field of magnetic particle spectroscopy (MPS)-based bioassays. MPS monitors dynamic response surface-functionalized nanoparticles (MNPs) upon excitation by an alternating (AMF) to detect various target analytes. This technology has flourished past decade due its low cost, background noise interference from biomatrix, and fast time. A large number var...