Research
2024
Uncertainty Quantification of Surrogate Models using Conformal Prediction
Vignesh Gopakumar, Ander Gray, Joel Oskarsson, Lorenzo Zanisi, Stanislas Pamela,
Daniel Giles, Matt J. Kusner, Marc Peter Deisenroth
arXiv preprint arXiv:2408.09881, 2024TLDR: Guaranteed and valid error bars across spatio-temporal domains using conformal prediction.
Valid Error Bars for Neural Weather Models using Conformal Prediction
Vignesh Gopakumar, Ander Gray, Joel Oskarsson, Lorenzo Zanisi, Stanislas Pamela,
Daniel Giles, Matt J. Kusner, Marc Peter Deisenroth
arXiv preprint arXiv:2406.14483, 2024TLDR: Marginal conformal prediction as a method of guaranteed error bars across neural weather models.
Plasma Surrogate Modelling using Fourier Neural Operators
Vignesh Gopakumar, Stanislas Pamela, Lorenzo Zanisi, Zongyi Li, Ander Gray,
Daniel Brennand, Nitesh Bhatia, Gregory Stathopoulos, Matt Kusner,
Marc Peter Deisenroth, Anima Anandkumar, JOREK Team, MAST Team
Nuclear Fusion, Volume 64, Number 5, 2024TLDR: Multi-variable FNO designed to model the plasma evolution within a Tokamak across both simulations and experiment on the MAST Tokamak.
2023
Fourier-RNNs for Modelling Noisy Physics data
Vignesh Gopakumar, Lorenzo Zanisi, Stanislas Pamela
arXiv preprint arXiv:2302.06534, 2023TLDR: Recurrent Fourier neural operators with hidden state representations for non-markovian physcial modelling.
Loss Landscape Engineering via Data Regulation on PINNs
Vignesh Gopakumar, Stanislas Pamela, Debasmita Samaddar
Machine Learning with Applications, Volume 12, 2023TLDR: Impact Data-Regulation has on smoothening the loss landscape of physics-informed neural networks for better convergence.
2022
Image Mapping the Temporal Evolution of Edge Characteristics in Tokamaks using Neural Networks
Vignesh Gopakumar, Debasmita Samaddar
Machine Learning: Science and Technology, Volume 1, Number 1, 2020TLDR: Branched fully convolutional network designed to emulate the plasma at the scrape-off layer with coupled plasma and neutral behaviour.
You can find the latest list of publications in my google scholar page.