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Proximal policy optimization (PPO) algorithm is a deep reinforcement learning algorithm with outstanding performance, especially in continuous control tasks. But the performance of this method is still affected by its exploration ability.…

机器学习 · 计算机科学 2020-11-12 Junwei Zhang , Zhenghao Zhang , Shuai Han , Shuai Lü

In Reinforcement Learning (abbreviated as RL), an agent interacts with the environment via a set of possible actions, and a reward is generated from some unknown distribution. The task here is to find an optimal set of actions such that the…

机器学习 · 计算机科学 2025-07-21 Aditi Anand , Suman Banerjee , Dildar Ali

Learning from few demonstrations to develop policies robust to variations in robot initial positions and object poses is a problem of significant practical interest in robotics. Compared to imitation learning, which often struggles to…

机器人学 · 计算机科学 2025-04-30 Haowen Sun , Han Wang , Chengzhong Ma , Shaolong Zhang , Jiawei Ye , Xingyu Chen , Xuguang Lan

Reinforcement Learning (RL) agents often struggle with inefficient exploration, particularly in environments with sparse rewards. Traditional exploration strategies can lead to slow learning and suboptimal performance because agents fail to…

机器学习 · 计算机科学 2026-03-31 Gaurav Chaudhary , Laxmidhar Behera , Washim Uddin Mondal

The recent remarkable progress of deep reinforcement learning (DRL) stands on regularization of policy for stable and efficient learning. A popular method, named proximal policy optimization (PPO), has been introduced for this purpose. PPO…

机器学习 · 计算机科学 2023-07-04 Taisuke Kobayashi

Safe Reinforcement Learning (Safe RL) aims to train an RL agent to maximize its performance in real-world environments while adhering to safety constraints, as exceeding safety violation limits can result in severe consequences. In this…

机器学习 · 计算机科学 2025-04-07 Hanping Zhang , Yuhong Guo

Autonomous driving has attracted great interest due to its potential capability in full-unsupervised driving. Model-based and learning-based methods are widely used in autonomous driving. Model-based methods rely on pre-defined models of…

Proximal policy optimization (PPO) is a widely-used algorithm for on-policy reinforcement learning. This work offers an alternative perspective of PPO, in which it is decomposed into the inner-loop estimation of update vectors, and the…

机器学习 · 计算机科学 2024-11-04 Charlie B. Tan , Edan Toledo , Benjamin Ellis , Jakob N. Foerster , Ferenc Huszár

Reinforcement Learning (RL) has made significant strides in complex tasks but struggles in multi-task settings with different embodiments. World model methods offer scalability by learning a simulation of the environment but often rely on…

机器学习 · 计算机科学 2025-02-25 Ignat Georgiev , Varun Giridhar , Nicklas Hansen , Animesh Garg

The integration of artificial intelligence across multiple domains has emphasized the importance of replicating human-like cognitive processes in AI. By incorporating emotional intelligence into AI agents, their emotional stability can be…

人工智能 · 计算机科学 2024-07-31 Hari Prasad , Chinnu Jacob , Imthias Ahamed T. P

Proximal Policy Optimization (PPO) is a highly popular policy-based deep reinforcement learning (DRL) approach. However, we observe that the homogeneous exploration process in PPO could cause an unexpected stability issue in the training…

机器学习 · 计算机科学 2022-12-14 Qisheng Zhang , Zhen Guo , Audun Jøsang , Lance M. Kaplan , Feng Chen , Dong H. Jeong , Jin-Hee Cho

Reinforcement learning (RL) has become a cornerstone for fine-tuning Large Language Models (LLMs), with Proximal Policy Optimization (PPO) serving as the de facto standard algorithm. Despite its ubiquity, we argue that the core ratio…

机器学习 · 计算机科学 2026-05-27 Penghui Qi , Xiangxin Zhou , Zichen Liu , Tianyu Pang , Chao Du , Min Lin , Wee Sun Lee

Autonomous robotic wiping is an important task in various industries, ranging from industrial manufacturing to sanitization in healthcare. Deep reinforcement learning (Deep RL) has emerged as a promising algorithm, however, it often suffers…

机器人学 · 计算机科学 2025-02-19 Yihong Liu , Dongyeop Kang , Sehoon Ha

Proximal policy optimization(PPO) has been proposed as a first-order optimization method for reinforcement learning. We should notice that an exterior penalty method is used in it. Often, the minimizers of the exterior penalty functions…

机器学习 · 计算机科学 2018-12-18 Cheng Zeng , Hongming Zhang

Reinforcement Learning (RL) in partially observable environments poses significant challenges due to the complexity of learning under uncertainty. While additional information, such as that available in simulations, can enhance training,…

机器学习 · 计算机科学 2026-03-16 Yueheng Li , Guangming Xie , Zongqing Lu

Safe reinforcement learning (RL) focuses on training reward-maximizing agents subject to pre-defined safety constraints. Yet, learning versatile safe policies that can adapt to varying safety constraint requirements during deployment…

机器学习 · 计算机科学 2024-05-01 Yihang Yao , Zuxin Liu , Zhepeng Cen , Jiacheng Zhu , Wenhao Yu , Tingnan Zhang , Ding Zhao

Over the recent years, reinforcement learning (RL) starts to show promising results in tackling combinatorial optimization (CO) problems, in particular when coupled with curriculum learning to facilitate training. Despite emerging empirical…

机器学习 · 计算机科学 2023-11-07 Runlong Zhou , Zelin He , Yuandong Tian , Yi Wu , Simon S. Du

Computer use agents (CUAs) have shown strong potential for automating complex digital workflows, yet their training remains constrained by costly live environment interaction and limited high-quality supervision. Existing filtered behavior…

人工智能 · 计算机科学 2026-05-29 Yifei He , Rui Yang , Hao Bai , Tong Zhang , Han Zhao

Reinforcement learning (RL) algorithms struggle with learning optimal policies for tasks where reward feedback is sparse and depends on a complex sequence of events in the environment. Probabilistic reward machines (PRMs) are finite-state…

机器学习 · 计算机科学 2025-10-20 Jan Corazza , Hadi Partovi Aria , Daniel Neider , Zhe Xu

A common challenge in real-time operations is deciding whether to re-solve an optimization problem or continue using an existing solution. While modern data platforms may collect information at high frequencies, many real-time operations…

机器学习 · 计算机科学 2025-09-30 Rui Ai , Hugo De Oliveira Barbalho , Sirui Li , Alexei Robsky , David Simchi-Levi , Ishai Menache