Technion, IEM faculty - Statistics Seminar Speaker: Ori Rosen, University of Texas at El Paso Title: AdaptSPEC: Adaptive spectral estimation for nonstationary time series Date: 01/01/2012 Time: 14:30 Place: Bloomfield-527 Abstract: <http://ie.technion.ac.il/seminar_files/1323162796_Rosen.pdf> Or read it here: We propose a method for analyzing possibly nonstationary time series by adaptively dividing the time series into an unknown but finite number of segments and estimating the corresponding local spectra by smoothing splines. The model is formulated in a Bayesian framework, and the estimation relies on reversible jump Markov chain Monte Carlo (RJMCMC) methods. For a given segmentation of the time series, the likelihood function is approximated via a product of local Whittle likelihoods. Thus, no parametric assumption is made about the process underlying the time series. The number and lengths of the segments are assumed unknown and may change from one MCMC iteration to another. The frequentist properties of the method are investigated by simulation, and an applications to EEG is described in detail --------------------------------------------------------- Technion Math. Net (TECHMATH) Editor: Michael Cwikel <techm@math.technion.ac.il> Announcement from: <ynardi@ie.technion.ac.il>