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Alex Alemi

4 accepted papers

2022

Bayesian Imitation Learning for End-to-End Mobile Manipulation

ICML 2022spotlight

In this work we investigate and demonstrate benefits of a Bayesian approach to imitation learning from multiple sensor inputs, as applied to the task of opening office doors with a mobile manipulator. Augmenting policies with additional sensor inputs{—}such as RGB + depth cameras{—}is a straightforw…

Cited by 12SourcePDFScholar
2022

PACm-Bayes: Narrowing the Empirical Risk Gap in the Misspecified Bayesian Regime

AISTATS 2022poster

The Bayesian posterior minimizes the "inferential risk" which itself bounds the "predictive risk." This bound is tight when the likelihood and prior are well-specified. How-ever since misspecification induces a gap,the Bayesian posterior predictive distribution may have poor generalization performan…

Cited by 32SourcePDFScholar
2021

Density of States Estimation for Out of Distribution Detection

AISTATS 2021poster

Perhaps surprisingly, recent studies have shown probabilistic model likelihoods have poor specificity for out-of-distribution (OOD) detection and often assign higher likelihoods to OOD data than in-distribution data. To ameliorate this issue we propose DoSE, the density of states estimator. Drawing…

Cited by 108SourcePDFScholar
2019

On Variational Bounds of Mutual Information

ICML 2019oral

Estimating and optimizing Mutual Information (MI) is core to many problems in machine learning, but bounding MI in high dimensions is challenging. To establish tractable and scalable objectives, recent work has turned to variational bounds parameterized by neural networks. However, the relationships…