Several studies have shown that the amplitude of the first rahmonic peak (R1) in the cepstrum is an indicator of hoarse voice quality. The cepstrum is obtained by taking the inverse Fourier Transform of the log-magnitude spectrum. In the present study, a number of spectral analysis processing steps are implemented, including period-synchronous and periodasynchronous analysis, as well as harmoni...

In this paper, Cramér type moderate deviations for the maximum of the periodogram and its studentized version are derived. The results are then applied to a simultaneous testing problem in gene expression time series. It is shown that the level of the simultaneous tests is accurate provided that the number of genes G and the sample size n satisfy G = exp(o(n)).

Bandwidth estimation in wireless networks is difficult due to the intrinsic randomness of the wireless links. In this paper, we propose a network calculus based method for statistical bandwidth estimation in wireless networks with random service, where the bandwidth is expressed in terms of a statistical service curve with a violation probability. By injecting probing packet trains, the statist...

A procedure is proposed to obtain conndence regions for spectral peak frequencies. The method is based on resampling the periodogram from the estimated spectrum in order to reestimate the spectrum and its peak frequency. We investigate the dependence of the results from the applied spectral estimator in three simulation studies and apply the method to tremor data.

Estimation of a nonparametric regression spectrum based on the periodogram is considered. Neither trend estimation nor smoothing of the periodogram are required. Alternatively, for cases where spectral estimation of phase shifts fails and the shift does not depend on frequency, a time domain estimator of the lag-shift is defined. Asymptotic properties of the frequency and time domain estimators...

Article history: Received 2 October 2016 Accepted 3 October 2016 Available online xxxx Presented by Haïm Brézis We discuss the topic of selecting optimal orthonormal bases for representing classes of signals defined either through statistics or via some deterministic characterizations, or combinations of the two. In all cases, the best bases result from spectral analysis of a Hermitian matrix t...

In this paper we analyze the dynamic behavior of a two unit parallel system with warm standby and common-cause failure. By the semigroup theory of linear operators on the Banach space, we give the wellposedness of the system and then prove the existence of the nonnegative dynamic solution and the steady solution of system. By spectral analysis of the system operator, we show that all the spectr...

We analyzed RXTE/PCA observations of GX339-4 in the low spectral state from 1996–1997. We found tight correlations between the QPO frequency and the spectral parameters of GX 339-4 X-ray emission. With the increase of the QPO frequency the slope of the primary power law and the amplitude of the reflected component increase. Frequency resolved spectral analysis showed, that the variability of th...

The problem of computing the fundamental frequency F0 in an accurate way is a known and still partially unsolved problem, especially given a noisy speech input. In this work, a distanttalking scenario is addressed, where a distributed microphone network provides multi-channel input sequences to process for speaker modeling purposes. Given this context, one may process in an independent way each...

Authors’ current addresses: H. C. So, Dept. of Electronic Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; Y. T. Chan, Dept. of Electrical and Computer Engineering, Royal Military College of Canada, Kingston, Ontario, Canada, K7K 5L0; Q. Ma, Wireless Networks, Nortel Networks, Ottawa, Canada; P. C. Ching, Dept. of Electronic Engineering, The Chinese University of ...