no code implementations • 28 Feb 2024 • Benedikt Barthel Sorensen, Alexis Charalampopoulos, Shixuan Zhang, Bryce Harrop, Ruby Leung, Themistoklis Sapsis
To overcome this challenge, we introduce a dynamical systems approach where the correction operator is trained using reference data and a coarse model simulation nudged towards that reference.
no code implementations • 21 Oct 2022 • Antoine Blanchard, Nishant Parashar, Boyko Dodov, Christian Lessig, Themistoklis Sapsis
Weather extremes are a major societal and economic hazard, claiming thousands of lives and causing billions of dollars in damage every year.
1 code implementation • 1 Dec 2021 • Samuel Rudy, Themistoklis Sapsis
One cause for this difficulty is that systems with extreme events, by definition, yield imbalanced datasets and that standard loss functions easily ignore rare events.
1 code implementation • 19 Feb 2021 • Yibo Yang, Antoine Blanchard, Themistoklis Sapsis, Paris Perdikaris
We present a new type of acquisition functions for online decision making in multi-armed and contextual bandit problems with extreme payoffs.
1 code implementation • 22 Jun 2020 • Antoine Blanchard, Themistoklis Sapsis
We introduce a class of acquisition functions for sample selection that leads to faster convergence in applications related to Bayesian experimental design and uncertainty quantification.
1 code implementation • 20 May 2020 • Antoine Blanchard, Themistoklis Sapsis
An unmanned autonomous vehicle (UAV) is sent on a mission to explore and reconstruct an unknown environment from a series of measurements collected by Bayesian optimization.
1 code implementation • 22 Apr 2020 • Antoine Blanchard, Themistoklis Sapsis
In Bayesian optimization, accounting for the importance of the output relative to the input is a crucial yet challenging exercise, as it can considerably improve the final result but often involves inaccurate and cumbersome entropy estimations.
1 code implementation • 20 Aug 2019 • Hassan Arbabi, Themistoklis Sapsis
As such, this framework represents the chaotic time series as the evolution of a stochastic system observed through the lens of a nonlinear map.
Dynamical Systems Chaotic Dynamics 62G32, 76F20, 49Q22, 60G10