Adaptive wavelet domain principal component analysis for nonstationary time series
Adaptive wavelet domain principal component analysis for nonstationary time series
复制标题
非平稳时间序列的自适应小波域主成分分析
DOI:
10.1080/10618600.2023.2301069
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发表时间:
2024
影响因子:
2.4
通讯作者:
Knight M
中科院分区:
文献类型:
--
作者:
Knight M
High-dimensional multivariate nonstationary time series, that is, data whose second order properties vary over time, are common in many scientific and industrial applications. In this article we propose a novel wavelet domain dimension reduction technique for nonstationary time series. By constructing a time-scale adaptive principal component analysis of the data, our proposed method is able to capture the salient dynamic features of the multivariate time series. We also introduce a new time and scale dependentcross-coherencemeasure to quantify the extent of association between a multivariate nonstationary time series and its proposed wavelet domain principal component representation. Theoretical results establish that our associated estimation scheme enjoys good bias and consistency properties when determining wavelet domain principal components of input data. The proposed method is illustrated using extensive simulations and we demonstrate its applicability on a real-world dataset arising in a neuroscience study. Supplementary materials, with proofs of theoretical results, additional simulations and code, are available online.
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影响因子:
0.9
作者:
Euan T. McGonigle;Rebecca Killick;M. Nunes
通讯作者:
Euan T. McGonigle;Rebecca Killick;M. Nunes
影响因子:
5.8
作者:
Simon A. C. Taylor;Timothy Park;I. Eckley
通讯作者:
I. Eckley
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
P. Fryzlewicz;G. Nason
通讯作者:
G. Nason
DOI:
10.1080/01621459.2019.1708368
发表时间:
2020-01-31
影响因子:
3.7
作者:
Das, Srinjoy;Politis, Dimitris N.
通讯作者:
Politis, Dimitris N.