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Systematic Techniques for Robust Inference and Data-driven Explainable closures for plasma physics

CORDIS · observation · Publication date unknown

lisions between particles are rare, the analytic closures have limitations. The goal of STRIDE (Systematic Techniques for Robust Inference and Data-driven Explainable closures for plasma) is to use machine learning to construct models with fewer degrees of freedom that describe kinetic processes relevant for Geospace Environmental Modelling (GEM), such as magnetic reconnection. Corrections to fluid-type models will be learned with deep neural networks and equation discovery and tested in numerical simulations. The important challenge involves understanding how such surrogates can be made robust against out-of-distribution shifts (i.e. different physical conditions) and numerical instabilities. Thus the closures will be first trained on data generated by high fidelity physics-based model, e.g. kinetic Particle-in-Cell simulations, for a specific set of parameters and then transfer learning will be applied to a different set of parameters to improve robustness. Uncertainty quantification and the ability to generate extremes will be investigated. The scientific question to be addres

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recordType

award

status

SIGNED

region

EU

value

175920

unit

EUR