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The traditional switch exhibits phase discontinuity and transients in few hundreds microradian which will induce the larger microwave leakage shift in the atomic fountain clock. The RF Mach-Zehnder interferometric switch is developed in order to decrease the phase variations without inducing phase discontinuity. To detect the phase variations, the phase transient measurement system is also built and...
Most work about the measurement of very fast transient overvoltage (VFTO) was carried out in the laboratory and test base. Because of the different GIS arrangement and power capacity, the time and frequency characteristics of VFTO in ultra high voltage (UHV) substation could be different with that obtained in the laboratory and test base. A series of VFTO measurements were carried out in two 1100...
In this paper, we introduce a class of vector-valued wavelet packets of space L2(Rs,Cv), which are generalizations of multivariate wavelet packets. A procedure for constructing a class of biorthogonal vector-valued higher-dimensional wavelet packets is presented and their biorthogonality properties are characterized by virtue of matrix theory, time-frequency analysis method, and operator theory. Three...
Wavelet analysis has been a powerful tool for exploring and solving many complicated problems in natural science and engineering computation. In this paper, the notion of orthogonal vector-valued wavelet packets with 3-scale in higher dimensions is introduced. A procedure for constructing them is presented. Their orthogonality property is characterized by virtue of finite group theory, time-frequency...
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