Search Results for author: Krishnan Raghavan

Found 9 papers, 0 papers with code

Forward Gradients for Data-Driven CFD Wall Modeling

no code implementations20 Nov 2023 Jan Hückelheim, Tadbhagya Kumar, Krishnan Raghavan, Pinaki Pal

Computational Fluid Dynamics (CFD) is used in the design and optimization of gas turbines and many other industrial/ scientific applications.

Self-supervised Learning for Anomaly Detection in Computational Workflows

no code implementations2 Oct 2023 Hongwei Jin, Krishnan Raghavan, George Papadimitriou, Cong Wang, Anirban Mandal, Ewa Deelman, Prasanna Balaprakash

To address this problem, we introduce an autoencoder-driven self-supervised learning~(SSL) approach that learns a summary statistic from unlabeled workflow data and estimates the normal behavior of the computational workflow in the latent space.

Anomaly Detection Contrastive Learning +1

Learning Continually on a Sequence of Graphs -- The Dynamical System Way

no code implementations19 May 2023 Krishnan Raghavan, Prasanna Balaprakash

However, the literature is quite sparse, when the data corresponding to a CL task is nonEuclidean-- data , such as graphs, point clouds or manifold, where the notion of similarity in the sense of Euclidean metric does not hold.

Continual Learning

Quantifying uncertainty for deep learning based forecasting and flow-reconstruction using neural architecture search ensembles

no code implementations20 Feb 2023 Romit Maulik, Romain Egele, Krishnan Raghavan, Prasanna Balaprakash

We demonstrate the feasibility of this framework for two tasks - forecasting from historical data and flow reconstruction from sparse sensors for the sea-surface temperature.

Bayesian Optimization Decision Making +3

Cooperative Deep $Q$-learning Framework for Environments Providing Image Feedback

no code implementations28 Oct 2021 Krishnan Raghavan, Vignesh Narayanan, Jagannathan Sarangapani

In this paper, we address two key challenges in deep reinforcement learning setting, sample inefficiency and slow learning, with a dual NN-driven learning approach.

Q-Learning

Learning to Control using Image Feedback

no code implementations28 Oct 2021 Krishnan Raghavan, Vignesh Narayanan, Jagannathan Saraangapani

Learning to control complex systems using non-traditional feedback, e. g., in the form of snapshot images, is an important task encountered in diverse domains such as robotics, neuroscience, and biology (cellular systems).

AutoDEUQ: Automated Deep Ensemble with Uncertainty Quantification

no code implementations26 Oct 2021 Romain Egele, Romit Maulik, Krishnan Raghavan, Bethany Lusch, Isabelle Guyon, Prasanna Balaprakash

However, building ensembles of neural networks is a challenging task because, in addition to choosing the right neural architecture or hyperparameters for each member of the ensemble, there is an added cost of training each model.

Uncertainty Quantification

Formalizing the Generalization-Forgetting Trade-off in Continual Learning

no code implementations NeurIPS 2021 Krishnan Raghavan, Prasanna Balaprakash

We formulate the continual learning (CL) problem via dynamic programming and model the trade-off between catastrophic forgetting and generalization as a two-player sequential game.

Continual Learning

Meta-Continual Learning Via Dynamic Programming

no code implementations1 Jan 2021 Krishnan Raghavan, Prasanna Balaprakash

Meta continual learning algorithms seek to train a model when faced with similar tasks observed in a sequential manner.

Continual Learning

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