Study of tea by the dual-index sequence analysis method for ~1HNMR fingerprint spectra

Bispectral analysis can reveal information of quadratic phase coupling of a time series and fits well the demands of characteristic extraction while on-line monitoring wear conditions of a milling cutter.

Bispectral analysis and dynamic spectral analysis are applied to the wind data of June, 1997, measured by MF radar in Yamagawa, Japan, to investigate nonlinear interactions among planetary waves, tidal waves and gravity waves in the mesopause region.

Roller bearing fault identification based on slice bi-spectrum analysis;

In this paper,time series bi-spectrum analysis for fault diagnosis of speed-regulating valve is proposed to study a new fault detection method for the hydraulic system.

Because the signal from rolling bearing is non-linear and non-Gaussian, here, the bispectrum analysis method is applied to the different types of rolling bearing and the different serious extent for the same bearing fault.

Thus the expression of skewness function is given based on the bispectrum analysis technique and the skewness as the roughness parameter definition.

Difference of Hilbert translation and bispectrum analysis method in extracting phase infomation was compared, and a pair of gear was diagnosed and monitored by Bispectrum analysis.