The wave power spectra, cross spectra and bispectra of surf zone under high wave condition are analysed based on the synchroneously collected wave data of two stations in the surf zone of the eastern Guangdong coast during typhoon 9713.

Vibration analysis of scrubbing-cooling tube based on wavelet power spectrum;

Because of the instability of EEG signals,the expressions of wavelet power spectrum for EEG signals have been described in this paper.

Using large eddy simulation method to analyze wind flow around trestle bridge deck,and with wavelet power spectrum analysis method,find that influence to the drag coefficient,the lift coefficient and the ten-sional moment coefficient will increase if wave amplitude increasing,and the last two coefficients will be influenced more acutely.

The clutter signal is reconstructed from multi-range channel based on the calculated clutter power spectral when airborne PD radar is working on the MPRF state.

By studying the mechanism of image degradation,analyzing the advantages and disadvantages of equivalent power spectrum filter,and estimating the power spectrum of the typical images,the authors put forward an improved restoration method based on equivalent power spectrum filter.