An L0-Norm Regularized Method for Multivariate Time Series Segmentation

被引:1
|
作者
Li, Min [1 ]
Huang, Yu-Mei [1 ]
机构
[1] Lanzhou Univ, Ctr Data Sci, Sch Math & Stat, Lanzhou 730000, Peoples R China
基金
中国国家自然科学基金;
关键词
Multivariate time series; segmentation; L-0-norm; dynamic programming; HIDDEN MARKOV-MODELS; CHANGE-POINTS; PRECONDITIONERS; CHANGEPOINTS; ALGORITHM;
D O I
10.4208/eajam.180921.050122
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
A multivariate time series segmentation model based on the minimization of the negative log-likelihood function of the series is proposed. The model is regularized by the L-0-norm of the time series mean change and solved by an alternating process. We use a dynamic programming algorithm in order to determine the breakpoints and the cross-validation method to find the parameters of the model. Experiments show the efficiency of the method for segmenting both synthetic and real multivariate time series.
引用
收藏
页码:353 / 366
页数:14
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