Interpolatory tensorial reduced order models for parametric dynamical systems
Interpolatory tensorial reduced order models for parametric dynamical systems
复制标题
参数动力系统的插值张量降阶模型
DOI:
10.1016/j.cma.2022.115122
复制
发表时间:
2022
影响因子:
7.2
通讯作者:
Olshanskii, Maxim A.
中科院分区:
文献类型:
--
作者:
Mamonov, Alexander V.;Olshanskii, Maxim A.
The paper introduces a reduced order model (ROM) for numerical integration of a dynamical system which depends on multiple parameters. The ROM is a projection of the dynamical system on a low dimensional space that is both problem-dependent andparameter-specific. The ROM exploits compressed tensor formats to find a low rank representation for a sample of high-fidelity snapshots of the system state. This tensorial representation provides ROM with an orthogonal basis in a universal space of all snapshotsandencodes information about the state variation in parameter domain. During the online phase and for any incoming parameter, this information is used to find a reduced basis that spans a parameter-specific subspace in the universal space. The computational cost of the online phase then depends only on tensor compression ranks, but not on space or time resolution of high-fidelity computations. Moreover, certain compressed tensor formats enable to avoid the adverse effect of parameter space dimension on the online costs (known as the curse of dimension). The analysis of the approach includes an estimate for the representation power of the acquired ROM basis. We illustrate the performance and prediction properties of the ROM with several numerical experiments, where tensorial ROM’s complexity and accuracy is compared to those of conventional POD-ROM.
登录
查看更多内容
DOI:
10.1137/1.9781611974829
发表时间:
2015-11
期刊:
arXiv: Numerical Analysis
影响因子:
--
作者:
A. Nouy
通讯作者:
A. Nouy
影响因子:
2.9
作者:
N. T. Son
通讯作者:
N. T. Son
DOI:
10.1016/j.cma.2020.113368
发表时间:
2020-12-01
影响因子:
7.2
作者:
Kastian, Steffen;Moser, Dieter;Reese, Stefanie
通讯作者:
Reese, Stefanie
DOI:
10.1073/pnas.1517384113
发表时间:
2016-04-12
影响因子:
11.1
作者:
Brunton, Steven L.;Proctor, Joshua L.;Kutz, J. Nathan
通讯作者:
Kutz, J. Nathan
DOI:
10.1016/j.matcom.2017.10.009
发表时间:
2018
期刊:
Math. Comput. Simul.
影响因子:
--
作者:
S. Dolgov;V. Kazeev;B. Khoromskij
通讯作者:
B. Khoromskij