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Modelling non-stationary variance in EEG time series by state space GARCH model.

作者信息

Wong Kin Foon Kevin, Galka Andreas, Yamashita Okito, Ozaki Tohru

机构信息

Graduate University for Advanced Studies, Minami Azabu 4-6-7, Minato-ku, Tokyo 106-8569, Japan.

出版信息

Comput Biol Med. 2006 Dec;36(12):1327-35. doi: 10.1016/j.compbiomed.2005.10.001. Epub 2005 Nov 15.

DOI:10.1016/j.compbiomed.2005.10.001
PMID:16293239
Abstract

We present a new approach to modelling non-stationarity in EEG time series by a generalized state space approach. A given time series can be decomposed into a set of noise-driven processes, each corresponding to a different frequency band. Non-stationarity is modelled by allowing the variances of the driving noises to change with time, depending on the state prediction error within the state space model. The method is illustrated by an application to EEG data recorded during the onset of anaesthesia.

摘要

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