Search Results for author: Pantelis R. Vlachas

Found 9 papers, 4 papers with code

RefreshNet: Learning Multiscale Dynamics through Hierarchical Refreshing

no code implementations24 Jan 2024 Junaid Farooq, Danish Rafiq, Pantelis R. Vlachas, Mohammad Abid Bazaz

Forecasting complex system dynamics, particularly for long-term predictions, is persistently hindered by error accumulation and computational burdens.

Computational Efficiency

Adaptive learning of effective dynamics: Adaptive real-time, online modeling for complex systems

1 code implementation4 Apr 2023 Ivica Kičić, Pantelis R. Vlachas, Georgios Arampatzis, Michail Chatzimanolakis, Leonidas Guibas, Petros Koumoutsakos

To the best of our knowledge, AdaLED is the first framework that couples a surrogate model with a computational solver to achieve online adaptive learning of effective dynamics.

Weather Forecasting

Learning from Predictions: Fusing Training and Autoregressive Inference for Long-Term Spatiotemporal Forecasts

no code implementations22 Feb 2023 Pantelis R. Vlachas, Petros Koumoutsakos

Recurrent Neural Networks (RNNs) have become an integral part of modeling and forecasting frameworks in areas like natural language processing and high-dimensional dynamical systems such as turbulent fluid flows.

Accelerated Simulations of Molecular Systems through Learning of their Effective Dynamics

no code implementations17 Feb 2021 Pantelis R. Vlachas, Julija Zavadlav, Matej Praprotnik, Petros Koumoutsakos

We believe that the proposed framework provides a dramatic increase to simulation capabilities and opens new horizons for the effective modeling of complex molecular systems.

Improved Memories Learning

no code implementations24 Aug 2020 Francesco Varoli, Guido Novati, Pantelis R. Vlachas, Petros Koumoutsakos

We propose Improved Memories Learning (IMeL), a novel algorithm that turns reinforcement learning (RL) into a supervised learning (SL) problem and delimits the role of neural networks (NN) to interpolation.

Reinforcement Learning (RL)

Multiscale Simulations of Complex Systems by Learning their Effective Dynamics

1 code implementation24 Jun 2020 Pantelis R. Vlachas, Georgios Arampatzis, Caroline Uhler, Petros Koumoutsakos

Here we present a novel systematic framework that bridges large scale simulations and reduced order models to Learn the Effective Dynamics (LED) of diverse complex systems.

Weather Forecasting

Backpropagation Algorithms and Reservoir Computing in Recurrent Neural Networks for the Forecasting of Complex Spatiotemporal Dynamics

1 code implementation9 Oct 2019 Pantelis R. Vlachas, Jaideep Pathak, Brian R. Hunt, Themistoklis P. Sapsis, Michelle Girvan, Edward Ott, Petros Koumoutsakos

We examine the efficiency of Recurrent Neural Networks in forecasting the spatiotemporal dynamics of high dimensional and reduced order complex systems using Reservoir Computing (RC) and Backpropagation through time (BPTT) for gated network architectures.

Data-assisted reduced-order modeling of extreme events in complex dynamical systems

1 code implementation9 Mar 2018 Zhong Yi Wan, Pantelis R. Vlachas, Petros Koumoutsakos, Themistoklis P. Sapsis

In this way, the data-driven model improves the imperfect model in regions where data is available, while for locations where data is sparse the imperfect model still provides a baseline for the prediction of the system dynamics.

Chaotic Dynamics Computational Physics

Data-Driven Forecasting of High-Dimensional Chaotic Systems with Long Short-Term Memory Networks

no code implementations21 Feb 2018 Pantelis R. Vlachas, Wonmin Byeon, Zhong Y. Wan, Themistoklis P. Sapsis, Petros Koumoutsakos

We introduce a data-driven forecasting method for high-dimensional chaotic systems using long short-term memory (LSTM) recurrent neural networks.

Gaussian Processes Time Series +1

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