Search Results for author: Jonathan Weare

Found 8 papers, 5 papers with code

Using Explainable AI and Transfer Learning to understand and predict the maintenance of Atlantic blocking with limited observational data

2 code implementations12 Apr 2024 huan zhang, Justin Finkel, Dorian S. Abbot, Edwin P. Gerber, Jonathan Weare

This work demonstrates the potential for machine learning methods to extract meaningful precursors of extreme weather events and achieve better prediction using limited observational data.

Blocking Explainable artificial intelligence +1

Improved Active Learning via Dependent Leverage Score Sampling

no code implementations8 Oct 2023 Atsushi Shimizu, Xiaoou Cheng, Christopher Musco, Jonathan Weare

We show how to obtain improved active learning methods in the agnostic (adversarial noise) setting by combining marginal leverage score sampling with non-independent sampling strategies that promote spatial coverage.

Active Learning Uncertainty Quantification

Inexact iterative numerical linear algebra for neural network-based spectral estimation and rare-event prediction

1 code implementation22 Mar 2023 John Strahan, Spencer C. Guo, Chatipat Lorpaiboon, Aaron R. Dinner, Jonathan Weare

Understanding dynamics in complex systems is challenging because there are many degrees of freedom, and those that are most important for describing events of interest are often not obvious.

Understanding and eliminating spurious modes in variational Monte Carlo using collective variables

no code implementations11 Nov 2022 huan zhang, Robert J. Webber, Michael Lindsey, Timothy C. Berkelbach, Jonathan Weare

The use of neural network parametrizations to represent the ground state in variational Monte Carlo (VMC) calculations has generated intense interest in recent years.

Variational Monte Carlo

Learning forecasts of rare stratospheric transitions from short simulations

no code implementations15 Feb 2021 Justin Finkel, Robert J. Webber, Dorian S. Abbot, Edwin P. Gerber, Jonathan Weare

We compute the probability and lead time efficiently by solving equations involving the transition operator, which encodes all information about the dynamics.

Atmospheric and Oceanic Physics Dynamical Systems Data Analysis, Statistics and Probability

A metric on directed graphs and Markov chains based on hitting probabilities

1 code implementation25 Jun 2020 Zachary M. Boyd, Nicolas Fraiman, Jeremy L. Marzuola, Peter J. Mucha, Braxton Osting, Jonathan Weare

The shortest-path, commute time, and diffusion distances on undirected graphs have been widely employed in applications such as dimensionality reduction, link prediction, and trip planning.

Dimensionality Reduction Link Prediction

Umbrella sampling: a powerful method to sample tails of distributions

1 code implementation13 Dec 2017 Charles Matthews, Jonathan Weare, Andrey Kravtsov, Elise Jennings

We present the umbrella sampling (US) technique and show that it can be used to sample extremely low probability areas of the posterior distribution that may be required in statistical analyses of data.

Instrumentation and Methods for Astrophysics

Ensemble preconditioning for Markov chain Monte Carlo simulation

1 code implementation13 Jul 2016 Charles Matthews, Jonathan Weare, Benedict Leimkuhler

We describe parallel Markov chain Monte Carlo methods that propagate a collective ensemble of paths, with local covariance information calculated from neighboring replicas.

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