The estimation for MA(q) model parameters——An inverse arithmetic on mixed-phase wavelets;

Estimation of mixed-phase wavelet base on higher-order statistics.;

Using a production area in an oilfield along the northwest margin of Junggar Basin as a case,several problems to influence post-stack seismic inversion,such as mixed-phase wavelet extraction,initial velocity model building and multi-well constraints,are analyzed under different observation times between well log and seismic data.

The mixed-phase seismic wavelet estimation approach based on high-order statistics developed in resent years often assumed that the reflectivity sequence of strata is non-Gaussian and statistically independent random process rather than Gaussian white noise distribution, which is more consistent with practical situation.

Researching on four-wave mixing phase-conjugation of paraelectric crystal will promote the development of voltage controlled phase-conjugation device, and has important application value.

Least squares deconvolution of the mixed phase unknown pulse,multiresolution seismic signal decovolution and neural network wavelet deconvolution can improve conventional deconvolution with iterative method,dyadic wavelet transform and neu.

The methodology and determination criterion for mixed phase seismic wavelet estimation were introduced under the conditions that there are no zeros on the unit circle for z transformation of wavelet and the automation of wavelet is assumed to be known.

In a process of seismic data processing, the wavelet processing with mixed phase is always an important project.