This essay,based on the near earthquake waveform data from March 2001 to July 2006,calculates with the coda Aki single scattering model the coda QC value 50km around Hongshan Seismic station.

Using the Sato single isotropic scattering model and the near-field digital seismic records from Hongshan seismostation in Hebei province,the variation characteristics of S-code QC value in Xingtai seismic region are studied.

This paper builds the multiple scattering model of imaging in fog and presents the algorithm of fog water content measure based on images blur degree.

Study on error of non-line-of-sight light propagation by single-scattering model;

Based on the assumption of single-scattering,atmospheric propagation model of non-line-of-sight optical scattering communication system is studied.

A simple proportional relationship is established between the higher scattering and the single scattering by analyzing each level scattering of the multiple backscattering lidar received signals.

A NLOS (Non line of sight) high-resolution location algorithm is proposed based on the parameters TOA(Time of Arrival) 、DOA(Direction of Arrival) and DOD (Direction Of Departure) of multiple propagation paths, which can be measured simultaneously under the scenarios where single scattering is dominant in the double-array mobile communication system.