Foufoula-Georgiou, 1996: Energy de- composition of rainfall in the time-frequency-scale domain using wavelet packets. J. Hydrol., 187, 3-27, doi:10.1016/ S0022-1694(96)03084-3.Venugopal V,Foufoula G E. Energy D
Short-time Fourier transform (STFT), wavelet transform, S-transform, Hilbert yellow transform (HHT), etc. FFT is a conversion from the time domain to the frequency domain, and has orthogonal
Given the uniqueness of thermal barrier coating in structure and composition materials, and the fact that laser-induced surface acoustic waves are extremely sensitive to material surface characteristic parameters, laser-induced ultrasonic technology is used to detect the thermal barrier coating in this ...
The frequency analysis of a signal is considered from the perspective of the overall composition of frequency, but the local frequency charac- teristics of the signal cannot be analyzed. Thus, it is only suitable for the analysis of steady-state disturbance [3]. STFT has fast computation speed...
many of the features and functions discussed above can be implemented in software, hardware, or firmware, or a combination thereof. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter...
They were tested and analyzed by X-ray diffraction (XRD) in order to clarify their material composition. Figure 1 shows the physical objects of the four specimens as well as their XRD spectra. The mineral compositions obtained from the analyses are specifically listed in Table 1. The mineral ...
Therefore, to determine the time-frequency feature composition of IES time-series data, extracting the statistical features of the decomposition coefficients obtained by time-frequency transform is considered an important part. Based on the existing research, the statistical features are determined to be...
The stabilised a-Se films were deposited above the glass transition temperature of the alloy with composition a-Se:0.3% As doped with ppm Cl. Electron paramagnetic resonance measurements at tempera- tures down to 5 K did not detect any spin active defects, even under photoexcitation above ...
The net effect is to produce a set of side-bands in composition with the received signal. The side-band signals are passed by IF amplifier 6, mixers 18 and 29, and are filtered by tone filter 32 at frequency f2. The resulting signal from tone filter 32, shown as a "correlation ...
be reduced via MgO doping and by using a stoichiometric composition. Potassium Niobate Potassium niobate (KNbO3) has a high nonlinearity. It is used for, e.g., frequency doubling tobluewavelengths and in piezoelectric applications. KTP, KTA, RTP, RTA...