TY - UNPB
T1 - Parallel-in-Time Solutions with Random Projection Neural Networks
AU - Betcke, Marta M.
AU - Kreusser, Lisa Maria
AU - Murari, Davide
PY - 2024/8/19
Y1 - 2024/8/19
N2 - This paper considers one of the fundamental parallel-in-time methods for the solution of ordinary differential equations, Parareal, and extends it by adopting a neural network as a coarse propagator. We provide a theoretical analysis of the convergence properties of the proposed algorithm and show its effectiveness for several examples, including Lorenz and Burgers' equations. In our numerical simulations, we further specialize the underpinning neural architecture to Random Projection Neural Networks (RPNNs), a 2-layer neural network where the first layer weights are drawn at random rather than optimized. This restriction substantially increases the efficiency of fitting RPNN's weights in comparison to a standard feedforward network without negatively impacting the accuracy, as demonstrated in the SIR system example.
AB - This paper considers one of the fundamental parallel-in-time methods for the solution of ordinary differential equations, Parareal, and extends it by adopting a neural network as a coarse propagator. We provide a theoretical analysis of the convergence properties of the proposed algorithm and show its effectiveness for several examples, including Lorenz and Burgers' equations. In our numerical simulations, we further specialize the underpinning neural architecture to Random Projection Neural Networks (RPNNs), a 2-layer neural network where the first layer weights are drawn at random rather than optimized. This restriction substantially increases the efficiency of fitting RPNN's weights in comparison to a standard feedforward network without negatively impacting the accuracy, as demonstrated in the SIR system example.
KW - math.NA
KW - cs.LG
KW - cs.NA
U2 - 10.48550/arXiv.2408.09756
DO - 10.48550/arXiv.2408.09756
M3 - Preprint
BT - Parallel-in-Time Solutions with Random Projection Neural Networks
PB - arXiv
ER -