Machine learning-based statistical closure models for turbulent dynamical systems
Machine learning-based statistical closure models for turbulent dynamical systems
复制标题
基于机器学习的湍流动力系统统计闭合模型
DOI:
10.1098/rsta.2021.0205
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Harlim, John
中科院分区:
文献类型:
--
作者:
Qi, Di;Harlim, John
We propose a machine learning (ML) non-Markovian closure modelling framework for accurate predictions of statistical responses of turbulent dynamical systems subjected to external forcings. One of the difficulties in this statistical closure problem is the lack of training data, which is a configuration that is not desirable in supervised learning with neural network models. In this study with the 40-dimensional Lorenz-96 model, the shortage of data is due to the stationarity of the statistics beyond the decorrelation time. Thus, the only informative content in the training data is from the short-time transient statistics. We adopt a unified closure framework on various truncation regimes, including and excluding the detailed dynamical equations for the variances. The closure framework employs a Long-Short-Term-Memory architecture to represent the higher-order unresolved statistical feedbacks with a choice of ansatz that accounts for the intrinsic instability yet produces stable long-time predictions. We found that this unified agnostic ML approach performs well under various truncation scenarios. Numerically, it is shown that the ML closure model can accurately predict the long-time statistical responses subjected to various time-dependent external forces that have larger maximum forcing amplitudes and are not in the training dataset.This article is part of the theme issue ‘Data-driven prediction in dynamical systems’.
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DOI:
10.1073/pnas.1313065110
发表时间:
2013-08-20
影响因子:
11.1
作者:
Sapsis, Themistoklis P.;Majda, Andrew J.
通讯作者:
Majda, Andrew J.
DOI:
--
发表时间:
2013
期刊:
Proceedings of the Royal Society A
影响因子:
--
作者:
Tyrus Berry;J. Harlim
通讯作者:
J. Harlim
影响因子:
4
作者:
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通讯作者:
Kupferman, R
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
F. Lu;Kevin K. Lin;A. Chorin
通讯作者:
A. Chorin
DOI:
10.1098/rspa.2017.0385
发表时间:
2017-09-01
影响因子:
3.5
作者:
Gouasmi, Ayoub;Parish, Eric J.;Duraisamy, Karthik
通讯作者:
Duraisamy, Karthik