Modern Koopman theory for dynamical systems

SL Brunton, M Budišić, E Kaiser, JN Kutz - arXiv preprint arXiv:2102.12086, 2021 - arxiv.org
The field of dynamical systems is being transformed by the mathematical tools and
algorithms emerging from modern computing and data science. First-principles derivations …

Bagging, optimized dynamic mode decomposition for robust, stable forecasting with spatial and temporal uncertainty quantification

D Sashidhar, JN Kutz - Philosophical Transactions of the …, 2022 - royalsocietypublishing.org
Dynamic mode decomposition (DMD) provides a regression framework for adaptively
learning a best-fit linear dynamics model over snapshots of temporal, or spatio-temporal …

Structured time-delay models for dynamical systems with connections to Frenet–Serret frame

SM Hirsh, SM Ichinaga, SL Brunton… - … of the Royal …, 2021 - royalsocietypublishing.org
Time-delay embedding and dimensionality reduction are powerful techniques for
discovering effective coordinate systems to represent the dynamics of physical systems …

Unveiling the role of climate in spatially synchronized locust outbreak risks

X Liu, D Zhang, X He - Science Advances, 2024 - science.org
Desert locusts threaten crop production and food security. Spatially synchronized locust
outbreaks further exacerbate these crises. Continental-scale understanding of such …

Koopman-assisted reinforcement learning

P Rozwood, E Mehrez, L Paehler, W Sun… - arXiv preprint arXiv …, 2024 - arxiv.org
The Bellman equation and its continuous form, the Hamilton-Jacobi-Bellman (HJB)
equation, are ubiquitous in reinforcement learning (RL) and control theory. However, these …

The multiverse of dynamic mode decomposition algorithms

MJ Colbrook - arXiv preprint arXiv:2312.00137, 2023 - arxiv.org
Dynamic Mode Decomposition (DMD) is a popular data-driven analysis technique used to
decompose complex, nonlinear systems into a set of modes, revealing underlying patterns …

Application of higher order dynamic mode decomposition to modal analysis and prediction of power systems with renewable sources of energy

CNS Jones, SV Utyuzhnikov - International Journal of Electrical Power & …, 2022 - Elsevier
Concern for climate change is driving a vastly increased use of electricity and variable
renewable energy supply encourages larger and evermore interconnected power systems …

An improved mode time coefficient for dynamic mode decomposition

L Xu, Z Liu, X Li, M Zhao, Y Zhao - Physics of Fluids, 2023 - pubs.aip.org
Dynamic mode decomposition (DMD) is widely used for extracting dominant structures of
unsteady flow fields. However, the traditional mode time coefficient of DMD is assumed to …

Dynamic mode decomposition with core sketch

SE Ahmed, PH Dabaghian, O San, DA Bistrian… - Physics of …, 2022 - pubs.aip.org
With the increase in collected data volumes, either from experimental measurements or high
fidelity simulations, there is an ever-growing need to develop computationally efficient tools …

On-the-fly dynamic mode decomposition for rapid time-extrapolation and analysis of cavity resonances

I Nayak, FL Teixeira… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
The application of time-domain solvers for characterizing high-quality () factor
electromagnetic (EM) cavities enables the acquisition of broadband data from a single run …