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Self-supervised speech representation learning (speech SSL) has demonstrated the benefit of scale in learning rich representations for Automatic Speech Recognition (ASR) with limited paired data, such as wav2vec 2.0. We investigate the…

Computation and Language · Computer Science 2021-10-27 Cheng-I Jeff Lai , Yang Zhang , Alexander H. Liu , Shiyu Chang , Yi-Lun Liao , Yung-Sung Chuang , Kaizhi Qian , Sameer Khurana , David Cox , James Glass

Large language models (LLMs) enhanced with retrieval-augmented generation (RAG) have introduced a new paradigm for web search. However, the limited context awareness of LLMs degrades their performance on RAG tasks. Existing methods to…

Computation and Language · Computer Science 2024-10-08 Tao Tan , Yining Qian , Ang Lv , Hongzhan Lin , Songhao Wu , Yongbo Wang , Feng Wang , Jingtong Wu , Xin Lu , Rui Yan

Many real-world problems, such as network packet routing and urban traffic control, are naturally modeled as multi-agent reinforcement learning (RL) problems. However, existing multi-agent RL methods typically scale poorly in the problem…

Artificial Intelligence · Computer Science 2018-05-22 Jakob Foerster , Nantas Nardelli , Gregory Farquhar , Triantafyllos Afouras , Philip H. S. Torr , Pushmeet Kohli , Shimon Whiteson

Memory replay may be key to learning in biological brains, which manage to learn new tasks continually without catastrophically interfering with previous knowledge. On the other hand, artificial neural networks suffer from catastrophic…

Machine Learning · Computer Science 2022-01-06 Haitz Sáez de Ocáriz Borde

Traditional multi-agent reinforcement learning (MARL) algorithms, such as independent Q-learning, struggle when presented with partially observable scenarios, and where agents are required to develop delicate action sequences. This is often…

Machine Learning · Computer Science 2022-11-21 F. Bredell , H. A. Engelbrecht , J. C. Schoeman

When a reinforcement learning (RL) method has to decide between several optional policies by solely looking at the received reward, it has to implicitly optimize a Multi-Armed-Bandit (MAB) problem. This arises the question: are current RL…

Machine Learning · Computer Science 2021-10-22 Refael Vivanti

Active reinforcement learning (ARL) is a variant on reinforcement learning where the agent does not observe the reward unless it chooses to pay a query cost c > 0. The central question of ARL is how to quantify the long-term value of reward…

Machine Learning · Computer Science 2020-11-26 David Krueger , Jan Leike , Owain Evans , John Salvatier

Return caching is a recent strategy that enables efficient minibatch training with multistep estimators (e.g. the {\lambda}-return) for deep reinforcement learning. By precomputing return estimates in sequential batches and then storing the…

Machine Learning · Computer Science 2021-12-08 Brett Daley , Christopher Amato

Explainable reinforcement learning allows artificial agents to explain their behavior in a human-like manner aiming at non-expert end-users. An efficient alternative of creating explanations is to use an introspection-based method that…

Machine Learning · Computer Science 2021-08-23 Angel Ayala , Francisco Cruz , Bruno Fernandes , Richard Dazeley

This paper presents an actor-critic deep reinforcement learning agent with experience replay that is stable, sample efficient, and performs remarkably well on challenging environments, including the discrete 57-game Atari domain and several…

Machine Learning · Computer Science 2017-07-11 Ziyu Wang , Victor Bapst , Nicolas Heess , Volodymyr Mnih , Remi Munos , Koray Kavukcuoglu , Nando de Freitas

We focus on the task of learning the value function in the reinforcement learning (RL) setting. This task is often solved by updating a pair of online and target networks while ensuring that the parameters of these two networks are…

Machine Learning · Computer Science 2024-09-24 Kavosh Asadi , Yao Liu , Shoham Sabach , Ming Yin , Rasool Fakoor

Static sparse training is a promising route to efficient learning by committing to a fixed mask pattern, yet the constrained structure reduces robustness. Early pruning decisions can lock the network into a brittle structure that is…

Machine Learning · Computer Science 2026-02-05 Meiling Jin , Fei Wang , Xiaoyun Yuan , Chen Qian , Yuan Cheng

Deep reinforcement learning (DRL) agents are trained through trial-and-error interactions with the environment. This leads to a long training time for dense neural networks to achieve good performance. Hence, prohibitive computation and…

Machine Learning · Computer Science 2022-05-09 Ghada Sokar , Elena Mocanu , Decebal Constantin Mocanu , Mykola Pechenizkiy , Peter Stone

Experience replay is one of the most commonly used approaches to improve the sample efficiency of reinforcement learning algorithms. In this work, we propose an approach to select and replay sequences of transitions in order to accelerate…

Artificial Intelligence · Computer Science 2022-09-29 Thommen George Karimpanal , Roland Bouffanais

Recent works have successfully demonstrated that sparse deep reinforcement learning agents can be competitive against their dense counterparts. This opens up opportunities for reinforcement learning applications in fields where inference…

Machine Learning · Computer Science 2025-06-23 Théo Vincent , Tim Faust , Yogesh Tripathi , Jan Peters , Carlo D'Eramo

Everything else being equal, simpler models should be preferred over more complex ones. In reinforcement learning (RL), simplicity is typically quantified on an action-by-action basis -- but this timescale ignores temporal regularities,…

Machine Learning · Computer Science 2023-05-29 Tankred Saanum , Noémi Éltető , Peter Dayan , Marcel Binz , Eric Schulz

Reinforcement learning has exceeded human-level performance in game playing AI with deep learning methods according to the experiments from DeepMind on Go and Atari games. Deep learning solves high dimension input problems which stop the…

Machine Learning · Computer Science 2019-09-12 Yue Zheng

In reinforcement learning (RL), experience replay-based sampling techniques play a crucial role in promoting convergence by eliminating spurious correlations. However, widely used methods such as uniform experience replay (UER) and…

Machine Learning · Computer Science 2023-02-07 Ramnath Kumar , Dheeraj Nagaraj

Recent times have witnessed sharp improvements in reinforcement learning tasks using deep reinforcement learning techniques like Deep Q Networks, Policy Gradients, Actor Critic methods which are based on deep learning based models and…

Machine Learning · Computer Science 2019-12-10 Uddeshya Upadhyay , Nikunj Shah , Sucheta Ravikanti , Mayanka Medhe

We introduce a new unsupervised pre-training method for reinforcement learning called APT, which stands for Active Pre-Training. APT learns behaviors and representations by actively searching for novel states in reward-free environments.…

Machine Learning · Computer Science 2021-10-29 Hao Liu , Pieter Abbeel