Abstract
A novel technique, the Delay Vector Variance method, which provides model-independent characterisation of time series in terms of their predictability is introduced and applied in a biomedical context. The merits of the procedure are demonstrated in a mode segmentation context on a set of long nonstationary physiological signals, obtained from subjects undergoing different sleep and wake stages. It is shown that the features extracted remain consistent within and across subjects. Next, the presence of nonlinearity associated with the different modes is investigated. A comparison with other measures supports the obtained results, namely that the signals show a higher degree of nonlinearity during wake than during sleep stages.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Flexer A, Dorner G, Sykacek P., Rezek I (2002) An automatic, continuous and probabilistic sleep stager based on a hidden Markov model. Applied Articial Intelligence 16 (3): 199 - 207
Gautama T, Mandic DP, Van Hulle MM (2003) Indications of nonlinear structures in brain electrical activity. Phys. Rev. E 67: 046204
Kohlmorgen J, Müller K-R, Rittweger J, Pawelzik K (2000) Identication of non-stationary dynamics in physiological recordings. Biol. Cybern. 83: 73-84
Mandic DP, Chambers JA (2001) Recurrent neural networks for prediction: learning algorithms, architectures and stability. John Wiley & Sons, U.K., 1st edn.
Paluš M (1996) Nonlinearity in normal human EEG: cycles, temporal asymmetry, nonstationarity and randomness, not chaos. Biol. Cybern. 75: 389 - 396
Schreiber T, Schmitz A (1996) Improved surrogate data for nonlinearity tests. Phys. Rev. Lett. 77: 635-638
Schreiber T, Schmitz A (1997) On the discrimination power of measures for nonlinearity in a time series. Phys. Rev. E 55: 5443-5447
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2004 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Pauwels, K., Gautama, T., Mandic, D.P., Van Hulle, M.M. (2004). Towards Model-Independent Mode Detection and Characterisation of Very Long Biomedical Time Series. In: Lotfi, A., Garibaldi, J.M. (eds) Applications and Science in Soft Computing. Advances in Soft Computing, vol 24. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45240-9_29
Download citation
DOI: https://doi.org/10.1007/978-3-540-45240-9_29
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-40856-7
Online ISBN: 978-3-540-45240-9
eBook Packages: Springer Book Archive