By the method of Hilbert-Huang transform(HHT),this article defines an instantaneous frequency time history of seismic acceleration record,which can to some extent quantify the frequency-non-stationary characteristics of original acceleration record.

Prediction of borehole stability by seismic records;

Optimum weighted stacking of seismic record with irregular noises;

According to seismic wave dynamic mechanics, the reasonable nonlinear mapping relationship between seismic record and logging data has been established.

Fractal and chaotic characteristics of seismic data;

In this paper a seismic multi scale edge detection (SMED) technique is proposed for detecting those variances from seismic data.