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Online recommendation requires handling rapidly changing user preferences. Deep reinforcement learning (DRL) is gaining interest as an effective means of capturing users' dynamic interest during interactions with recommender systems.…

Information Retrieval · Computer Science 2021-10-22 Xiaocong Chen , Lina Yao , Xianzhi Wang , Julian McAuley

Learning control policies to perform complex robotics tasks from human preference data presents significant challenges. On the one hand, the complexity of such tasks typically requires learning policies to perform a variety of subtasks,…

Machine Learning · Computer Science 2025-01-03 Utsav Singh , Souradip Chakraborty , Wesley A. Suttle , Brian M. Sadler , Vinay P Namboodiri , Amrit Singh Bedi

Exploration with sparse rewards remains a challenging research problem in reinforcement learning (RL). Especially for sequential object manipulation tasks, the RL agent always receives negative rewards until completing all sub-tasks, which…

Robotics · Computer Science 2022-11-04 Yongle Luo , Yuxin Wang , Kun Dong , Qiang Zhang , Erkang Cheng , Zhiyong Sun , Bo Song

Experience replay (ER) improves the data efficiency of off-policy reinforcement learning (RL) algorithms by allowing an agent to store and reuse its past experiences in a replay buffer. While many techniques have been proposed to enhance ER…

Machine Learning · Computer Science 2021-04-06 Yunshu Du , Garrett Warnell , Assefaw Gebremedhin , Peter Stone , Matthew E. Taylor

Sparse reward is one of the most challenging problems in reinforcement learning (RL). Hindsight Experience Replay (HER) attempts to address this issue by converting a failed experience to a successful one by relabeling the goals. Despite…

Machine Learning · Computer Science 2019-02-13 Harris Chan , Yuhuai Wu , Jamie Kiros , Sanja Fidler , Jimmy Ba

Reinforcement Learning (RL) algorithms typically require millions of environment interactions to learn successful policies in sparse reward settings. Hindsight Experience Replay (HER) was introduced as a technique to increase sample…

Artificial Intelligence · Computer Science 2019-10-31 Himanshu Sahni , Toby Buckley , Pieter Abbeel , Ilya Kuzovkin

This paper presents a benchmarking study of some of the state-of-the-art reinforcement learning algorithms used for solving two simulated vision-based robotics problems. The algorithms considered in this study include soft actor-critic…

Robotics · Computer Science 2022-01-13 Swagat Kumar , Hayden Sampson , Ardhendu Behera

Experience replay serves as a key component in the success of online reinforcement learning (RL). Prioritized experience replay (PER) reweights experiences by the temporal difference (TD) error empirically enhancing the performance.…

Machine Learning · Computer Science 2024-09-20 Changling Li , Zhang-Wei Hong , Pulkit Agrawal , Divyansh Garg , Joni Pajarinen

Through many recent successes in simulation, model-free reinforcement learning has emerged as a promising approach to solving continuous control robotic tasks. The research community is now able to reproduce, analyze and build quickly on…

Machine Learning · Computer Science 2018-09-21 A. Rupam Mahmood , Dmytro Korenkevych , Gautham Vasan , William Ma , James Bergstra

Reinforcement learning has seen wide success in finetuning large language models to better align with instructions via human feedback. The so-called algorithm, Reinforcement Learning with Human Feedback (RLHF) demonstrates impressive…

Computation and Language · Computer Science 2023-02-13 Tianjun Zhang , Fangchen Liu , Justin Wong , Pieter Abbeel , Joseph E. Gonzalez

Recent advancements in reinforcement learning have made significant impacts across various domains, yet they often struggle in complex multi-agent environments due to issues like algorithm instability, low sampling efficiency, and the…

Multiagent Systems · Computer Science 2024-08-22 Cheng Xu , Changtian Zhang , Yuchen Shi , Ran Wang , Shihong Duan , Yadong Wan , Xiaotong Zhang

This paper introduces {HINER}, a novel neural representation for compressing HSI and ensuring high-quality downstream tasks on compressed HSI. HINER fully exploits inter-spectral correlations by explicitly encoding of spectral wavelengths…

Image and Video Processing · Electrical Eng. & Systems 2024-08-01 Junqi Shi , Mingyi Jiang , Ming Lu , Tong Chen , Xun Cao , Zhan Ma

In recent years, the growing demand for more intelligent service robots is pushing the development of mobile robot navigation algorithms to allow safe and efficient operation in a dense crowd. Reinforcement learning (RL) approaches have…

Robotics · Computer Science 2024-10-28 Keyu Li , Ye Lu , Max Q. -H. Meng

For reinforcement learning on complex stochastic systems where many factors dynamically impact the output trajectories, it is desirable to effectively leverage the information from historical samples collected in previous iterations to…

Machine Learning · Statistics 2022-09-13 Hua Zheng , Wei Xie , M. Ben Feng

Robotic grasping is a crucial area of research as it can result in the acceleration of the automation of several Industries utilizing robots ranging from manufacturing to healthcare. Reinforcement learning is the field of study where an…

Artificial Intelligence · Computer Science 2020-01-14 Raghav Nagpal , Achyuthan Unni Krishnan , Hanshen Yu

This paper presents a novel model-free Reinforcement Learning algorithm for learning behavior in continuous action, state, and goal spaces. The algorithm approximates optimal value functions using non-parametric estimators. It is able to…

Artificial Intelligence · Computer Science 2019-08-28 Andreas Gerken , Michael Spranger

Reinforcement learning is a machine learning approach based on behavioral psychology. It is focused on learning agents that can acquire knowledge and learn to carry out new tasks by interacting with the environment. However, a problem…

Artificial Intelligence · Computer Science 2022-12-15 Hugo Muñoz , Ernesto Portugal , Angel Ayala , Bruno Fernandes , Francisco Cruz

Model-based reinforcement learning is a promising learning strategy for practical robotic applications due to its improved data-efficiency versus model-free counterparts. However, current state-of-the-art model-based methods rely on shaped…

Machine Learning · Computer Science 2023-08-10 Robert McCarthy , Qiang Wang , Stephen J. Redmond

In this work, we propose and evaluate a new reinforcement learning method, COMPact Experience Replay (COMPER), which uses temporal difference learning with predicted target values based on recurrence over sets of similar transitions, and a…

A key theme in the past decade has been that when large neural networks and large datasets combine they can produce remarkable results. In deep reinforcement learning (RL), this paradigm is commonly made possible through experience replay,…

Machine Learning · Computer Science 2023-10-30 Cong Lu , Philip J. Ball , Yee Whye Teh , Jack Parker-Holder