Search Results for author: Matthew West

Found 12 papers, 6 papers with code

Learning from Integral Losses in Physics Informed Neural Networks

2 code implementations27 May 2023 Ehsan Saleh, Saba Ghaffari, Timothy Bretl, Luke Olson, Matthew West

Our numerical results confirm the existence of the aforementioned bias in practice, and also show that our proposed delayed target approach can lead to accurate solutions with comparable quality to ones estimated with a large number of samples.

Benchmarking

Hierarchical Graph Neural Network with Cross-Attention for Cross-Device User Matching

no code implementations6 Apr 2023 Ali Taghibakhshi, Mingyuan Ma, Ashwath Aithal, Onur Yilmaz, Haggai Maron, Matthew West

Cross-device user matching is a critical problem in numerous domains, including advertising, recommender systems, and cybersecurity.

Recommendation Systems

MG-GNN: Multigrid Graph Neural Networks for Learning Multilevel Domain Decomposition Methods

1 code implementation26 Jan 2023 Ali Taghibakhshi, Nicolas Nytko, Tareq Uz Zaman, Scott MacLachlan, Luke Olson, Matthew West

Domain decomposition methods (DDMs) are popular solvers for discretized systems of partial differential equations (PDEs), with one-level and multilevel variants.

Truly Deterministic Policy Optimization

1 code implementation30 May 2022 Ehsan Saleh, Saba Ghaffari, Timothy Bretl, Matthew West

In this paper, we present a policy gradient method that avoids exploratory noise injection and performs policy search over the deterministic landscape.

Learning Interface Conditions in Domain Decomposition Solvers

1 code implementation19 May 2022 Ali Taghibakhshi, Nicolas Nytko, Tareq Zaman, Scott MacLachlan, Luke Olson, Matthew West

Domain decomposition methods are widely used and effective in the approximation of solutions to partial differential equations.

Efficient Feedback and Partial Credit Grading for Proof Blocks Problems

no code implementations8 Apr 2022 Seth Poulsen, Shubhang Kulkarni, Geoffrey Herman, Matthew West

In this work, we propose an algorithm for the edit distance problem that significantly outperforms the baseline procedure of exhaustively enumerating over the entire search space.

Management Mathematical Proofs

Optimization-Based Algebraic Multigrid Coarsening Using Reinforcement Learning

1 code implementation NeurIPS 2021 Ali Taghibakhshi, Scott MacLachlan, Luke Olson, Matthew West

A system of linear equations defines a graph on the set of unknowns and each level of a multigrid solver requires the selection of an appropriate coarse graph along with restriction and interpolation operators that map to and from the coarse representation.

reinforcement-learning Reinforcement Learning (RL)

Local Navigation and Docking of an Autonomous Robot Mower using Reinforcement Learning and Computer Vision

no code implementations15 Jan 2021 Ali Taghibakhshi, Nathan Ogden, Matthew West

We demonstrate a successful navigation and docking control system for the John Deere Tango autonomous mower, using only a single camera as the input.

Navigate object-detection +2

Unsupervised Regionalization of Particle-resolved Aerosol Mixing State Indices on the Global Scale

no code implementations6 Dec 2020 Zhonghua Zheng, Joseph Ching, Jeffrey H. Curtis, Yu Yao, Peng Xu, Matthew West, Nicole Riemer

Here we developed a simple but effective unsupervised learning approach to regionalize predictions of global aerosol mixing state indices.

Statistically Model Checking PCTL Specifications on Markov Decision Processes via Reinforcement Learning

no code implementations1 Apr 2020 Yu Wang, Nima Roohi, Matthew West, Mahesh Viswanathan, Geir E. Dullerud

Probabilistic Computation Tree Logic (PCTL) is frequently used to formally specify control objectives such as probabilistic reachability and safety.

Negation Q-Learning +2

A tree-based radial basis function method for noisy parallel surrogate optimization

1 code implementation21 Aug 2019 Chenchao Shou, Matthew West

Parallel surrogate optimization algorithms have proven to be efficient methods for solving expensive noisy optimization problems.

Bayesian Optimization

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