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Learning-based methods have improved locomotion skills of quadruped robots through deep reinforcement learning. However, the sim-to-real gap and low sample efficiency still limit the skill transfer. To address this issue, we propose an…

Robotics · Computer Science 2024-03-19 Haojie Shi , Tingguang Li , Qingxu Zhu , Jiapeng Sheng , Lei Han , Max Q. -H. Meng

Humanoid robots have attracted significant attention in recent years. Reinforcement Learning (RL) is one of the main ways to control the whole body of humanoid robots. RL enables agents to complete tasks by learning from environment…

Robotics · Computer Science 2025-03-31 Xianqi Zhang , Hongliang Wei , Wenrui Wang , Xingtao Wang , Xiaopeng Fan , Debin Zhao

Because imitation learning relies on human demonstrations in hard-to-simulate settings, the inclusion of force control in this method has resulted in a shortage of training data, even with a simple change in speed. Although the field of…

Robotics · Computer Science 2025-05-07 Nozomu Masuya , Hiroshi Sato , Koki Yamane , Takuya Kusume , Sho Sakaino , Toshiaki Tsuji

Robotics Reinforcement Learning (RL) often relies on carefully engineered auxiliary rewards to supplement sparse primary learning objectives to compensate for the lack of large-scale, real-world, trial-and-error data. While these auxiliary…

Robotics · Computer Science 2025-03-21 Linji Wang , Tong Xu , Yuanjie Lu , Xuesu Xiao

World models empower model-based agents to interactively explore, reason, and plan within imagined environments for real-world decision-making. However, the high demand for interactivity poses challenges in harnessing recent advancements in…

Computer Vision and Pattern Recognition · Computer Science 2024-11-01 Jialong Wu , Shaofeng Yin , Ningya Feng , Xu He , Dong Li , Jianye Hao , Mingsheng Long

Robot arms should be able to learn new tasks. One framework here is reinforcement learning, where the robot is given a reward function that encodes the task, and the robot autonomously learns actions to maximize its reward. Existing…

Robotics · Computer Science 2024-03-21 Shaunak A. Mehta , Soheil Habibian , Dylan P. Losey

The effectiveness of reinforcement learning (RL) agents in continuous control robotics tasks is mainly dependent on the design of the underlying reward function, which is highly prone to reward hacking. A misalignment between the reward…

Humans are masters at quickly learning many complex tasks, relying on an approximate understanding of the dynamics of their environments. In much the same way, we would like our learning agents to quickly adapt to new tasks. In this paper,…

Reinforcement learning (RL) requires skillful definition and remarkable computational efforts to solve optimization and control problems, which could impair its prospect. Introducing human guidance into reinforcement learning is a promising…

Machine Learning · Computer Science 2022-11-30 Jingda Wu , Zhiyu Huang , Wenhui Huang , Chen Lv

Reinforcement Learning (RL) has progressed from simple control tasks to complex real-world challenges with large state spaces. While RL excels in these tasks, training time remains a limitation. Reward shaping is a popular solution, but…

As Text-to-Video (T2V) generation models continue to evolve, the complexity of video evaluation necessitates a fine-grained assessment across various axes. To address this, recent works have focused on developing Multidimensional Video…

Machine Learning · Computer Science 2026-05-28 Muyao Wang , Zeke Xie , Hideki Nakayama

Large Vision-Language Models (LVLMs) typically follow a two-stage training paradigm-pretraining and supervised fine-tuning. Recently, preference optimization, derived from the language domain, has emerged as an effective post-training…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Yufei Zhan , Yousong Zhu , Shurong Zheng , Hongyin Zhao , Fan Yang , Ming Tang , Jinqiao Wang

World models are widely explored in embodied intelligence, yet they typically predict distinct evolutions of the world and the ego within a single stream, where the world captures persistent instruction-agnostic scene regularities and the…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Zuyao Lin , Jianhui Zhang , Peidong Jia , Xiaoguang Zhao , Shanghang Zhang , Xingyu Chen

Rewards play a crucial role in reinforcement learning. To arrive at the desired policy, the design of a suitable reward function often requires significant domain expertise as well as trial-and-error. Here, we aim to minimize the effort…

Robotics · Computer Science 2020-11-18 Zheng Wu , Wenzhao Lian , Vaibhav Unhelkar , Masayoshi Tomizuka , Stefan Schaal

World models have become indispensable tools for embodied intelligence, serving as powerful simulators capable of generating realistic robotic videos while addressing critical data scarcity challenges. However, current embodied world models…

Computer Vision and Pattern Recognition · Computer Science 2025-07-01 Yu Shang , Xin Zhang , Yinzhou Tang , Lei Jin , Chen Gao , Wei Wu , Yong Li

A longstanding goal in character animation is to combine data-driven specification of behavior with a system that can execute a similar behavior in a physical simulation, thus enabling realistic responses to perturbations and environmental…

Graphics · Computer Science 2018-08-07 Xue Bin Peng , Pieter Abbeel , Sergey Levine , Michiel van de Panne

The field of social robotics will likely need to depart from a paradigm of designed behaviours and imitation learning and adopt modern reinforcement learning (RL) methods to enable robots to interact fluidly and efficaciously with humans.…

Robotics · Computer Science 2022-02-02 Thomas Kingsford

To perform robot manipulation tasks, a low-dimensional state of the environment typically needs to be estimated. However, designing a state estimator can sometimes be difficult, especially in environments with deformable objects. An…

Robotics · Computer Science 2019-07-16 Xingyu Lin , Harjatin Singh Baweja , David Held

Reinforcement Learning (RL) is notoriously data-inefficient, which makes training on a real robot difficult. While model-based RL algorithms (world models) improve data-efficiency to some extent, they still require hours or days of…

Machine Learning · Computer Science 2023-10-25 Yunhai Feng , Nicklas Hansen , Ziyan Xiong , Chandramouli Rajagopalan , Xiaolong Wang

The reinforcement learning paradigm allows, in principle, for complex behaviours to be learned directly from simple reward signals. In practice, however, it is common to carefully hand-design the reward function to encourage a particular…