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The current state-of-the-art theoretical analysis of Actor-Critic (AC) algorithms significantly lags in addressing the practical aspects of AC implementations. This crucial gap needs bridging to bring the analysis in line with practical…

机器学习 · 计算机科学 2024-12-10 Mudit Gaur , Amrit Singh Bedi , Di Wang , Vaneet Aggarwal

Actor-critic methods integrating target networks have exhibited a stupendous empirical success in deep reinforcement learning. However, a theoretical understanding of the use of target networks in actor-critic methods is largely missing in…

机器学习 · 计算机科学 2022-02-24 Anas Barakat , Pascal Bianchi , Julien Lehmann

Asynchronous and parallel implementation of standard reinforcement learning (RL) algorithms is a key enabler of the tremendous success of modern RL. Among many asynchronous RL algorithms, arguably the most popular and effective one is the…

机器学习 · 计算机科学 2023-08-02 Han Shen , Kaiqing Zhang , Mingyi Hong , Tianyi Chen

Model-free deep reinforcement learning (RL) has been successfully applied to challenging continuous control domains. However, poor sample efficiency prevents these methods from being widely used in real-world domains. This paper introduces…

机器学习 · 计算机科学 2022-10-27 Sicen Li , Qinyun Tang , Yiming Pang , Xinmeng Ma , Gang Wang

Low-precision training has become a popular approach to reduce compute requirements, memory footprint, and energy consumption in supervised learning. In contrast, this promising approach has not yet enjoyed similarly widespread adoption…

机器学习 · 计算机科学 2021-06-07 Johan Bjorck , Xiangyu Chen , Christopher De Sa , Carla P. Gomes , Kilian Q. Weinberger

A key aspect of intelligence is the ability to demonstrate a broad spectrum of behaviors for adapting to unexpected situations. Over the past decade, advancements in deep reinforcement learning have led to groundbreaking achievements to…

机器学习 · 计算机科学 2024-06-04 Luca Grillotti , Maxence Faldor , Borja G. León , Antoine Cully

ATARI is a suite of video games used by reinforcement learning (RL) researchers to test the effectiveness of the learning algorithm. Receiving only the raw pixels and the game score, the agent learns to develop sophisticated strategies,…

机器学习 · 计算机科学 2024-07-17 Le Zhang , Yong Gu , Xin Zhao , Yanshuo Zhang , Shu Zhao , Yifei Jin , Xinxin Wu

Generalizability and stability are two key objectives for operating reinforcement learning (RL) agents in the real world. Designing RL algorithms that optimize these objectives can be a costly and painstaking process. This paper presents…

Many policy gradient methods are variants of Actor-Critic (AC), where a value function (critic) is learned to facilitate updating the parameterized policy (actor). The update to the actor involves a log-likelihood update weighted by the…

机器学习 · 计算机科学 2023-03-02 Samuel Neumann , Sungsu Lim , Ajin Joseph , Yangchen Pan , Adam White , Martha White

Deep Reinforcement Learning (DRL) algorithms for continuous action spaces are known to be brittle toward hyperparameters as well as \cut{being}sample inefficient. Soft Actor Critic (SAC) proposes an off-policy deep actor critic algorithm…

机器学习 · 计算机科学 2019-06-10 Patrick Nadeem Ward , Ariella Smofsky , Avishek Joey Bose

Robotic manipulation in unstructured environments requires reliable execution under diverse conditions, yet many state-of-the-art systems still struggle with high-dimensional action spaces, sparse rewards, and slow generalization beyond…

机器人学 · 计算机科学 2026-01-30 Leonidas Askianakis , Aleksandr Artemov

This work examines average-reward reinforcement learning with general policy parametrization. Existing state-of-the-art (SOTA) guarantees for this problem are either suboptimal or hindered by several challenges, including poor scalability…

机器学习 · 计算机科学 2025-05-07 Swetha Ganesh , Washim Uddin Mondal , Vaneet Aggarwal

Expressive generative policies such as diffusion and flow models are appealing for MaxEnt online reinforcement learning because of their ability to model multimodal and highly non-Gaussian action distributions. However, training effective…

机器学习 · 计算机科学 2026-05-12 Ke He , Le He , Shunpu Tang , Yafei Wang , Lisheng Fan

Federated learning (FL) in multi-service provider (SP) ecosystems is fundamentally hampered by non-cooperative dynamics, where privacy constraints and competing interests preclude the centralized optimization of multi-SP communication and…

机器学习 · 计算机科学 2025-08-29 Renxuan Tan , Rongpeng Li , Xiaoxue Yu , Xianfu Chen , Xing Xu , Zhifeng Zhao

In recent years, many applications have deployed incentive mechanisms to promote users' attention and engagement. Most incentive mechanisms determine specific incentive values based on users' attributes (e.g., preferences), while such…

社会与信息网络 · 计算机科学 2022-11-15 Shiqing Wu , Weihua Li , Quan Bai

Despite the empirical success of the actor-critic algorithm, its theoretical understanding lags behind. In a broader context, actor-critic can be viewed as an online alternating update algorithm for bilevel optimization, whose convergence…

机器学习 · 计算机科学 2019-07-16 Zhuoran Yang , Yongxin Chen , Mingyi Hong , Zhaoran Wang

Both generative adversarial networks (GAN) in unsupervised learning and actor-critic methods in reinforcement learning (RL) have gained a reputation for being difficult to optimize. Practitioners in both fields have amassed a large number…

机器学习 · 计算机科学 2017-01-19 David Pfau , Oriol Vinyals

Two timescale stochastic approximation (SA) has been widely used in value-based reinforcement learning algorithms. In the policy evaluation setting, it can model the linear and nonlinear temporal difference learning with gradient correction…

机器学习 · 计算机科学 2020-11-11 Tengyu Xu , Yingbin Liang

Robust Reinforcement Learning aims to derive optimal behavior that accounts for model uncertainty in dynamical systems. However, previous studies have shown that by considering the worst case scenario, robust policies can be overly…

机器学习 · 计算机科学 2018-10-25 Esther Derman , Daniel J. Mankowitz , Timothy A. Mann , Shie Mannor

Actor-critic (AC) methods have exhibited great empirical success compared with other reinforcement learning algorithms, where the actor uses the policy gradient to improve the learning policy and the critic uses temporal difference learning…

机器学习 · 计算机科学 2022-10-11 Yue Wu , Weitong Zhang , Pan Xu , Quanquan Gu