Latent Modes of Nonlinear Flows : A Koopman Theory Analysis, Paperback / softback Book

Paperback / softback

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Extracting the latent underlying structures of complex nonlinear local and nonlocal flows is essential for their analysis and modeling.

In this Element the authors attempt to provide a consistent framework through Koopman theory and its related popular discrete approximation - dynamic mode decomposition (DMD).

They investigate the conditions to perform appropriate linearization, dimensionality reduction and representation of flows in a highly general setting.

The essential elements of this framework are Koopman eigenfunctions (KEFs) for which existence conditions are formulated.

This is done by viewing the dynamic as a curve in state-space.

These conditions lay the foundations for system reconstruction, global controllability, and observability for nonlinear dynamics.

They examine the limitations of DMD through the analysis of Koopman theory and propose a new mode decomposition technique based on the typical time profile of the dynamics.

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