Search Results for author: Andrew Jones

Found 10 papers, 5 papers with code

Kernel Density Bayesian Inverse Reinforcement Learning

1 code implementation13 Mar 2023 Aishwarya Mandyam, Didong Li, Diana Cai, Andrew Jones, Barbara E. Engelhardt

Inverse reinforcement learning~(IRL) is a powerful framework to infer an agent's reward function by observing its behavior, but IRL algorithms that learn point estimates of the reward function can be misleading because there may be several functions that describe an agent's behavior equally well.

BIRL Density Estimation +2

Compositional Q-learning for electrolyte repletion with imbalanced patient sub-populations

no code implementations6 Oct 2021 Aishwarya Mandyam, Andrew Jones, Jiayu Yao, Krzysztof Laudanski, Barbara Engelhardt

CFQI uses a compositional $Q$-value function with separate modules for each task variant, allowing it to take advantage of shared knowledge while learning distinct policies for each variant.

Decision Making Navigate +4

Nested Policy Reinforcement Learning for Clinical Decision Support

no code implementations29 Sep 2021 Aishwarya Mandyam, Andrew Jones, Krzysztof Laudanski, Barbara Engelhardt

Off-policy reinforcement learning (RL) has proven to be a powerful framework for guiding agents' actions in environments with stochastic rewards and unknown or noisy state dynamics.

Decision Making Navigate +3

Spectral embedding for dynamic networks with stability guarantees

1 code implementation NeurIPS 2021 Ian Gallagher, Andrew Jones, Patrick Rubin-Delanchy

We consider the problem of embedding a dynamic network, to obtain time-evolving vector representations of each node, which can then be used to describe changes in behaviour of individual nodes, communities, or the entire graph.

Clustering Position +1

The multilayer random dot product graph

1 code implementation20 Jul 2020 Andrew Jones, Patrick Rubin-Delanchy

We present a comprehensive extension of the latent position network model known as the random dot product graph to accommodate multiple graphs -- both undirected and directed -- which share a common subset of nodes, and propose a method for jointly embedding the associated adjacency matrices, or submatrices thereof, into a suitable latent space.

Link Prediction Stochastic Block Model +1

Spectral embedding of weighted graphs

no code implementations12 Oct 2019 Ian Gallagher, Andrew Jones, Anna Bertiger, Carey Priebe, Patrick Rubin-Delanchy

When analyzing weighted networks using spectral embedding, a judicious transformation of the edge weights may produce better results.

Anomaly Detection Clustering +1

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