Search Results for author: Alex Irpan

Found 19 papers, 8 papers with code

Stop Regressing: Training Value Functions via Classification for Scalable Deep RL

no code implementations6 Mar 2024 Jesse Farebrother, Jordi Orbay, Quan Vuong, Adrien Ali Taïga, Yevgen Chebotar, Ted Xiao, Alex Irpan, Sergey Levine, Pablo Samuel Castro, Aleksandra Faust, Aviral Kumar, Rishabh Agarwal

Observing this discrepancy, in this paper, we investigate whether the scalability of deep RL can also be improved simply by using classification in place of regression for training value functions.

Atari Games regression +1

BC-Z: Zero-Shot Task Generalization with Robotic Imitation Learning

no code implementations4 Feb 2022 Eric Jang, Alex Irpan, Mohi Khansari, Daniel Kappler, Frederik Ebert, Corey Lynch, Sergey Levine, Chelsea Finn

In this paper, we study the problem of enabling a vision-based robotic manipulation system to generalize to novel tasks, a long-standing challenge in robot learning.

Imitation Learning

Actionable Models: Unsupervised Offline Reinforcement Learning of Robotic Skills

no code implementations15 Apr 2021 Yevgen Chebotar, Karol Hausman, Yao Lu, Ted Xiao, Dmitry Kalashnikov, Jake Varley, Alex Irpan, Benjamin Eysenbach, Ryan Julian, Chelsea Finn, Sergey Levine

We consider the problem of learning useful robotic skills from previously collected offline data without access to manually specified rewards or additional online exploration, a setting that is becoming increasingly important for scaling robot learning by reusing past robotic data.

Q-Learning reinforcement-learning +1

Meta-Learning Requires Meta-Augmentation

1 code implementation NeurIPS 2020 Janarthanan Rajendran, Alex Irpan, Eric Jang

Meta-learning algorithms aim to learn two components: a model that predicts targets for a task, and a base learner that quickly updates that model when given examples from a new task.

Meta-Learning

RL-CycleGAN: Reinforcement Learning Aware Simulation-To-Real

no code implementations CVPR 2020 Kanishka Rao, Chris Harris, Alex Irpan, Sergey Levine, Julian Ibarz, Mohi Khansari

However, this sort of translation is typically task-agnostic, in that the translated images may not preserve all features that are relevant to the task.

reinforcement-learning Reinforcement Learning (RL) +2

Off-Policy Evaluation via Off-Policy Classification

no code implementations NeurIPS 2019 Alex Irpan, Kanishka Rao, Konstantinos Bousmalis, Chris Harris, Julian Ibarz, Sergey Levine

However, for high-dimensional observations, such as images, models of the environment can be difficult to fit and value-based methods can make IS hard to use or even ill-conditioned, especially when dealing with continuous action spaces.

Classification General Classification +2

The Principle of Unchanged Optimality in Reinforcement Learning Generalization

no code implementations2 Jun 2019 Alex Irpan, Xingyou Song

Several recent papers have examined generalization in reinforcement learning (RL), by proposing new environments or ways to add noise to existing environments, then benchmarking algorithms and model architectures on those environments.

Benchmarking reinforcement-learning +1

Reliable Uncertainty Estimates in Deep Neural Networks using Noise Contrastive Priors

no code implementations ICLR 2019 Danijar Hafner, Dustin Tran, Timothy Lillicrap, Alex Irpan, James Davidson

NCPs are compatible with any model that can output uncertainty estimates, are easy to scale, and yield reliable uncertainty estimates throughout training.

Active Learning

Noise Contrastive Priors for Functional Uncertainty

2 code implementations ICLR 2019 Danijar Hafner, Dustin Tran, Timothy Lillicrap, Alex Irpan, James Davidson

NCPs are compatible with any model that can output uncertainty estimates, are easy to scale, and yield reliable uncertainty estimates throughout training.

Active Learning

Can Deep Reinforcement Learning Solve Erdos-Selfridge-Spencer Games?

1 code implementation ICML 2018 Maithra Raghu, Alex Irpan, Jacob Andreas, Robert Kleinberg, Quoc V. Le, Jon Kleinberg

Deep reinforcement learning has achieved many recent successes, but our understanding of its strengths and limitations is hampered by the lack of rich environments in which we can fully characterize optimal behavior, and correspondingly diagnose individual actions against such a characterization.

reinforcement-learning Reinforcement Learning (RL)

Using Simulation and Domain Adaptation to Improve Efficiency of Deep Robotic Grasping

1 code implementation22 Sep 2017 Konstantinos Bousmalis, Alex Irpan, Paul Wohlhart, Yunfei Bai, Matthew Kelcey, Mrinal Kalakrishnan, Laura Downs, Julian Ibarz, Peter Pastor, Kurt Konolige, Sergey Levine, Vincent Vanhoucke

We extensively evaluate our approaches with a total of more than 25, 000 physical test grasps, studying a range of simulation conditions and domain adaptation methods, including a novel extension of pixel-level domain adaptation that we term the GraspGAN.

Domain Adaptation Industrial Robots +1

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