Stability of Discrete Empirical Interpolation and Gappy Proper Orthogonal Decomposition with Randomized and Deterministic Sampling Points
Stability of Discrete Empirical Interpolation and Gappy Proper Orthogonal Decomposition with Randomized and Deterministic Sampling Points
复制标题
随机和确定性采样点的离散经验插值和间隙本征正交分解的稳定性
DOI:
10.1137/19m1307391
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发表时间:
2020
影响因子:
3.1
通讯作者:
Gugercin, Serkan
中科院分区:
文献类型:
--
作者:
Peherstorfer, Benjamin;Drmač, Zlatko;Gugercin, Serkan
This work investigates the stability of (discrete) empirical interpolation for nonlinear model reduction and state field approximation from measurements. Empirical interpolation derives approximations from a few samples (measurements) via interpolation in low-dimensional spaces. It has been observed that empirical interpolation can become unstable if the samples are perturbed due to, e.g., noise, turbulence, and numerical inaccuracies. The main contribution of this work is a probabilistic analysis that shows that stable approximations are obtained if samples are randomized and if more samples than dimensions of the low-dimensional spaces are used. Oversampling, i.e., taking more sampling points than dimensions of the low-dimensional spaces, leads to approximations via regression and is known under the name of gappy proper orthogonal decomposition. Building on the insights of the probabilistic analysis, a deterministic sampling strategy is presented that aims to achieve lower approximation errors with fewer points than randomized sampling by taking information about the low-dimensional spaces into account. Numerical results of reconstructing velocity fields from noisy measurements of combustion processes and model reduction in the presence of noise demonstrate the instability of empirical interpolation and the stability of gappy proper orthogonal decomposition with oversampling.
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DOI:
10.1137/17m1123286
发表时间:
2018-02
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
--
作者:
Ralf Zimmermann;B. Peherstorfer;K. Willcox
通讯作者:
Ralf Zimmermann;B. Peherstorfer;K. Willcox
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Yuxiang Zhou
通讯作者:
Yuxiang Zhou
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Krithika Manohar;S. Brunton;J. Kutz
通讯作者:
J. Kutz
影响因子:
3.1
作者:
Zimmermann, R.;Willcox, K.
通讯作者:
Willcox, K.
DOI:
10.1002/nme.3327
发表时间:
2012-04-27
影响因子:
2.9
作者:
Eftang, Jens L.;Stamm, Benjamin
通讯作者:
Stamm, Benjamin