期刊
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
卷 33, 期 13, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218127423501493
关键词
Irregular sampling data; recurrence network; weighted dynamic time warping; control chart
This paper introduces the recurrence network method and its application in time series analysis. Due to the limitations of irregular sampling, the dynamic time warping method is proposed to calculate distances between time series segments. In order to deal with the sparse sampling area, a weighted dynamic time warping method is further proposed. Two case studies demonstrate the effectiveness of the proposed method.
Recurrence network is a typical time series analysis method. However, irregular sampling may overshadow the dynamic features characterized by traditional recurrence network method, which makes the method ineffective. This paper introduces dynamic time warping method to determine the distance between time series segments. The method can match the features of time series segments and reduce the distortion of distances caused by irregular sampling. For points in sparse sampling area, many characteristics may not be collected and thus the matching results are unreliable. To overcome this problem, we further propose weighted dynamic time warping method which assigns small weights to matching points with sparse local sampling so as to reduce their influence on distance. A recurrence network constructed by weighted dynamic time warping method can effectively capture underlying nonlinear and nonstationary system dynamics from irregular sampling time series. The effectiveness of the proposed method is illustrated by two case studies: the discrimination of different dynamic behaviors and detection of system parameter perturbation from time series of Rossler system.
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