Based on the Gauss linear frequency-modulated wavelet transform, a new characteristic index is presented, namely time-frequency energy attenuation factor which
Digital data of precursors is noted for its high accuracy. Therefore, it is important to extract the high frequency information from the low ones in the digital
By applying the empirical Green's function method, we first proved that the source spectra in the middle eastern area of North Tianshan follow the ω-2 Brun
The difficulties in the reconstruction of Zhang Heng's Seismoscope come mainly from the lack of understanding of its mechanical principles. Such a discrepan