We propose a new point of view in the study Fourier analysis on graphs, taking advantage localization domain. For signal f vertices weighted graph G with Laplacian matrix L, standard relies functions g(L)f for some filters g IL, smallest interval containing spectrum sp(L)⊂IL. show that carefully chosen partitions IL=⊔1≤k≤KIk (Ik⊂IL), there are many advantages understanding collection (g(LIk)f)1...

in analyzing a signal, especially a non-stationary signal, it is often necessarythe desired signal to be segmented into small epochs. segmentation can beperformed by splitting the signal at time instances where signal amplitude orfrequency change. in this paper, the signal is initially decomposed into signals withdifferent frequency bands using wavelet transform. then, fractal dimension of thed...

In this paper, a method based on some test signal (Test Signal Method) is developed to find the dominant oscillating frequencies and dampings associated with any generator in the system. The method can be realized easily by time domain simulation using electromechanical transient programs. The theoretical background of the test signal method is the theory of mechanical admittance and mode ident...

This paper proposes a method of extracting the desired signal from a noisy signal. This method solves the problem of segregating two acoustic sources by using constraints related to the four regularities proposed by Bregman and by making two improvements to our previously proposed method. One is to incorporate a method of estimating the fundamental frequency using the Comb ltering on the lterba...