Search Results for author: Tom Bertalan

Found 8 papers, 2 papers with code

Implementation and (Inverse Modified) Error Analysis for implicitly-templated ODE-nets

no code implementations31 Mar 2023 Aiqing Zhu, Tom Bertalan, Beibei Zhu, Yifa Tang, Ioannis G. Kevrekidis

We thus formulate an adaptive algorithm which monitors the level of error and adapts the number of (unrolled) implicit solution iterations during the training process, so that the error of the unrolled approximation is less than the current learning loss.

Numerical Integration

Learning effective stochastic differential equations from microscopic simulations: linking stochastic numerics to deep learning

2 code implementations10 Jun 2021 Felix Dietrich, Alexei Makeev, George Kevrekidis, Nikolaos Evangelou, Tom Bertalan, Sebastian Reich, Ioannis G. Kevrekidis

We identify effective stochastic differential equations (SDE) for coarse observables of fine-grained particle- or agent-based simulations; these SDE then provide useful coarse surrogate models of the fine scale dynamics.

Numerical Integration

Personalized Algorithm Generation: A Case Study in Learning ODE Integrators

2 code implementations4 May 2021 Yue Guo, Felix Dietrich, Tom Bertalan, Danimir T. Doncevic, Manuel Dahmen, Ioannis G. Kevrekidis, Qianxiao Li

As a case study, we develop a machine learning approach that automatically learns effective solvers for initial value problems in the form of ordinary differential equations (ODEs), based on the Runge-Kutta (RK) integrator architecture.

Meta-Learning

Initializing LSTM internal states via manifold learning

no code implementations27 Apr 2021 Felix P. Kemeth, Tom Bertalan, Nikolaos Evangelou, Tianqi Cui, Saurabh Malani, Ioannis G. Kevrekidis

We present an approach, based on learning an intrinsic data manifold, for the initialization of the internal state values of LSTM recurrent neural networks, ensuring consistency with the initial observed input data.

Time Series Time Series Analysis

Learning emergent PDEs in a learned emergent space

no code implementations23 Dec 2020 Felix P. Kemeth, Tom Bertalan, Thomas Thiem, Felix Dietrich, Sung Joon Moon, Carlo R. Laing, Ioannis G. Kevrekidis

These coordinates then serve as an emergent space in which to learn predictive models in the form of partial differential equations (PDEs) for the collective description of the coupled-agent system.

Coarse-grained and emergent distributed parameter systems from data

no code implementations16 Nov 2020 Hassan Arbabi, Felix P. Kemeth, Tom Bertalan, Ioannis Kevrekidis

We explore the derivation of distributed parameter system evolution laws (and in particular, partial differential operators and associated partial differential equations, PDEs) from spatiotemporal data.

Variable Detection

Transformations between deep neural networks

no code implementations10 Jul 2020 Tom Bertalan, Felix Dietrich, Ioannis G. Kevrekidis

We propose to test, and when possible establish, an equivalence between two different artificial neural networks by attempting to construct a data-driven transformation between them, using manifold-learning techniques.

Transfer Learning

LOCA: LOcal Conformal Autoencoder for standardized data coordinates

no code implementations15 Apr 2020 Erez Peterfreund, Ofir Lindenbaum, Felix Dietrich, Tom Bertalan, Matan Gavish, Ioannis G. Kevrekidis, Ronald R. Coifman

We propose a deep-learning based method for obtaining standardized data coordinates from scientific measurements. Data observations are modeled as samples from an unknown, non-linear deformation of an underlying Riemannian manifold, which is parametrized by a few normalized latent variables.

Cannot find the paper you are looking for? You can Submit a new open access paper.