We computed a group velocity dispersion of Love surface wave and obtained lithosphere structure by appling the matched filter frequancy time analysis and the grid dispersion inversion.

UHF partial discharge classification based on time-frequency matched filter algorithm;

Based on both long period surface wave data from China Digital Seismic Net (CDSN) and technique of moderate filtering - frequency time analysis, the mixed path frequency dispersion of LOVE swarm waves in mainland of China is calculated.

Supported by the same periodicity between the gun s fire and firing,a new way of firing rate measurement is built based on the image sequences recorded by the high-speed video while the gun is firing and the adaptive time-frequency analysis is adopted to estimate the gun s firing rate.