Modern Koopman theory for dynamical systems
The field of dynamical systems is being transformed by the mathematical tools and
algorithms emerging from modern computing and data science. First-principles derivations …
algorithms emerging from modern computing and data science. First-principles derivations …
Beyond expectations: residual dynamic mode decomposition and variance for stochastic dynamical systems
Koopman operators linearize nonlinear dynamical systems, making their spectral
information of crucial interest. Numerous algorithms have been developed to approximate …
information of crucial interest. Numerous algorithms have been developed to approximate …
Overcoming the timescale barrier in molecular dynamics: Transfer operators, variational principles and machine learning
One of the main challenges in molecular dynamics is overcoming the 'timescale barrier': in
many realistic molecular systems, biologically important rare transitions occur on timescales …
many realistic molecular systems, biologically important rare transitions occur on timescales …
Propofol anesthesia destabilizes neural dynamics across cortex
Every day, hundreds of thousands of people undergo general anesthesia. One hypothesis is
that anesthesia disrupts dynamic stability—the ability of the brain to balance excitability with …
that anesthesia disrupts dynamic stability—the ability of the brain to balance excitability with …
Koopman-theoretic modeling of quasiperiodically driven systems: Example of signalized traffic corridor
This article presents a novel approach to analyzing quasiperiodically driven dynamical
systems. It presents a holistic data-driven framework for reconstructing such a system and …
systems. It presents a holistic data-driven framework for reconstructing such a system and …
Non-stationary dynamic mode decomposition
Many physical processes display complex high-dimensional time-varying behavior, from
global weather patterns to brain activity. An outstanding challenge is to express high …
global weather patterns to brain activity. An outstanding challenge is to express high …
Koopman-based spectral clustering of directed and time-evolving graphs
While spectral clustering algorithms for undirected graphs are well established and have
been successfully applied to unsupervised machine learning problems ranging from image …
been successfully applied to unsupervised machine learning problems ranging from image …
On the lifting and reconstruction of nonlinear systems with multiple invariant sets
The Koopman operator provides a linear perspective on non-linear dynamics by focusing on
the evolution of observables in an invariant subspace. Observables of interest are typically …
the evolution of observables in an invariant subspace. Observables of interest are typically …
Data-driven acoustic control of a spherical bubble using a Koopman linear quadratic regulator
AJ Gibson, XC Yee, ML Calvisi - The Journal of the Acoustical Society …, 2024 - pubs.aip.org
Koopman operator theory has gained interest as a framework for transforming nonlinear
dynamics on the state space into linear dynamics on abstract function spaces, which …
dynamics on the state space into linear dynamics on abstract function spaces, which …
Optimizing deep brain stimulation based on isostable amplitude in essential tremor patient models
Objective. Deep brain stimulation is a treatment for medically refractory essential tremor. To
improve the therapy, closed-loop approaches are designed to deliver stimulation according …
improve the therapy, closed-loop approaches are designed to deliver stimulation according …