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Probabilistic error estimation for non-intrusive reduced models learned from data of systems governed by linear parabolic partial differential equations

Journal Article · · Mathematical Modelling and Numerical Analysis
DOI:https://doi.org/10.1051/m2an/2021010· OSTI ID:1784724
 [1];  [2]
  1. Courant Inst. of Mathematical Sciences, New York, NY (United States); New York University
  2. Courant Inst. of Mathematical Sciences, New York, NY (United States)

This work derives a residual-based a posteriori error estimator for reduced models learned with non-intrusive model reduction from data of high-dimensional systems governed by linear parabolic partial differential equations with control inputs. It is shown that quantities that are necessary for the error estimator can be either obtained exactly as the solutions of least-squares problems in a non-intrusive way from data such as initial conditions, control inputs, and high-dimensional solution trajectories or bounded in a probabilistic sense. Here, the computational procedure follows an offline/online decomposition. In the offline (training) phase, the high-dimensional system is judiciously solved in a black-box fashion to generate data and to set up the error estimator. In the online phase, the estimator is used to bound the error of the reduced-model predictions for new initial conditions and new control inputs without recourse to the high-dimensional system. Numerical results demonstrate the workflow of the proposed approach from data to reduced models to certified predictions.

Research Organization:
New York Univ., NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Grant/Contract Number:
SC0019334
OSTI ID:
1784724
Journal Information:
Mathematical Modelling and Numerical Analysis, Journal Name: Mathematical Modelling and Numerical Analysis Journal Issue: 3 Vol. 55; ISSN 0764-583X
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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