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A kernel-based method for data-driven koopman spectral analysis

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Williams, Matthew O., Rowley, Clarence W., Kevrekidis, Ioannis G.·2015·Journal of Computational Dynamics

Abstract

A data-driven, kernel-based method for approximating the leading Koopmaneigenvalues, eigenfunctions, and modes in problems with high-dimensional statespaces is presented.This approach uses a set of scalar observables (functions that map a state to a scalar value) that are defined implicitly by the feature map associated with a user-defined kernel function.This circumvents the computational issues that arise due to the number offunctions required to span a ``sufficiently rich'' subspace of all possible scalar observables in such applications.We illustrate this method on two examples: the first is the FitzHugh-Nagumo PDE, a prototypical one-dimensional reaction-diffusionsystem, and the second is a set of vorticity data computed from experimentally obtainedvelocity data from flow past a cylinder at Reynolds number 413.In both examples, we use the output of Dynamic Mode Decomposition, which has a similar computational cost, as the benchmark for our approach.

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Metadata

Authors
Williams, M. O., Rowley, C. W., & Kevrekidis, I. G.
Venue
Journal of Computational Dynamics
Published
2015
Volume
2
Issue
2
Pages
247-265
ISSN
  • 2158-2491 (ISSN-L)
  • 2158-2505
OpenAlex
W2395962256
Cited by
324
References
1
FWCI
4.49
Type
journal article
Language
en
Open access
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CoChat. (2026). Citation check: A kernel-based method for data-driven koopman spectral analysis. https://app.cochat.ai/papers/10.3934/jcd.2015005
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Williams, M. O., Rowley, C. W., & Kevrekidis, I. G. (2015). A kernel-based method for data-driven koopman spectral analysis. Journal of Computational Dynamics. https://doi.org/10.3934/jcd.2015005

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