期刊
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
卷 311, 期 1-2, 页码 260-274出版社
ELSEVIER
DOI: 10.1016/S0378-4371(02)00831-2
关键词
time series analysis; non-stationary time series; heart rate variability
We present a new method to describe time series with a highly complex time evolution. The time series is projected onto a two-dimensional phase-space plot which is quantified in terms of a multipole expansion where every data point is assigned a unit mass. The multipoles provide an efficient characterization of the original time series. (C) 2002 Elsevier Science B.V. All rights reserved.
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