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Autonomous vehicles inevitably encounter a vast array of scenarios in real-world environments. Addressing long-tail scenarios, particularly those involving intensive interactions with numerous traffic participants, remains one of the most…

机器人学 · 计算机科学 2024-12-16 Guanzhou Li , Jianping Wu , Yujing He

Few-shot learning (FSL) commonly requires a model to identify images (queries) that belong to classes unseen during training, based on a few labelled samples of the new classes (support set) as reference. So far, plenty of algorithms…

计算机视觉与模式识别 · 计算机科学 2024-12-20 Yunwei Bai , Ying Kiat Tan , Shiming Chen , Yao Shu , Tsuhan Chen

Modeling of real-world biological multi-agents is a fundamental problem in various scientific and engineering fields. Reinforcement learning (RL) is a powerful framework to generate flexible and diverse behaviors in cyberspace; however,…

人工智能 · 计算机科学 2023-12-20 Keisuke Fujii , Kazushi Tsutsui , Atom Scott , Hiroshi Nakahara , Naoya Takeishi , Yoshinobu Kawahara

Standard regression techniques, while powerful, are often constrained by predefined, differentiable loss functions such as mean squared error. These functions may not fully capture the desired behavior of a system, especially when dealing…

机器学习 · 计算机科学 2025-08-04 Yongchao Huang

Reinforcement Learning (RL) algorithms often require long training to become useful, especially in complex environments with sparse rewards. While techniques like reward shaping and curriculum learning exist to accelerate training, these…

机器学习 · 计算机科学 2025-09-11 Lukas Toral , Teddy Lazebnik

Reinforcement learning (RL) is typically concerned with estimating stationary policies or single-step models, leveraging the Markov property to factorize problems in time. However, we can also view RL as a generic sequence modeling problem,…

机器学习 · 计算机科学 2021-11-30 Michael Janner , Qiyang Li , Sergey Levine

Applying Reinforcement Learning (RL) to sequence generation models enables the direct optimization of long-term rewards (\textit{e.g.,} BLEU and human feedback), but typically requires large-scale sampling over a space of action sequences.…

计算与语言 · 计算机科学 2023-08-07 Chenglong Wang , Hang Zhou , Yimin Hu , Yifu Huo , Bei Li , Tongran Liu , Tong Xiao , Jingbo Zhu

Very often when studying non-equilibrium systems one is interested in analysing dynamical behaviour that occurs with very low probability, so called rare events. In practice, since rare events are by definition atypical, they are often…

统计力学 · 物理学 2021-01-06 Dominic C. Rose , Jamie F. Mair , Juan P. Garrahan

Denoising-based generative models, particularly diffusion and flow matching algorithms, have achieved remarkable success. However, aligning their output distributions with complex downstream objectives, such as human preferences,…

机器学习 · 计算机科学 2025-08-29 Luozhijie Jin , Zijie Qiu , Jie Liu , Zijie Diao , Lifeng Qiao , Ning Ding , Alex Lamb , Xipeng Qiu

Various data augmentation techniques have been recently proposed in image-based deep reinforcement learning (DRL). Although they empirically demonstrate the effectiveness of data augmentation for improving sample efficiency or…

机器学习 · 计算机科学 2024-02-20 Jianshu Hu , Yunpeng Jiang , Paul Weng

Reinforcement Learning (RL) has shown promise for aligning Large Language Models (LLMs) to follow instructions with various constraints. Despite the encouraging results, RL improvement inevitably relies on sampling successful, high-quality…

人工智能 · 计算机科学 2025-12-30 Kongcheng Zhang , Qi Yao , Shunyu Liu , Wenjian Zhang , Min Cen , Yang Zhou , Wenkai Fang , Yiru Zhao , Baisheng Lai , Mingli Song

Reinforcement learning (RL) has emerged as a powerful post-training paradigm for enhancing the reasoning capabilities of large language models (LLMs). However, reinforcement learning for LLMs faces substantial data scarcity challenges,…

Reinforcement learning (RL) yields substantial improvements in large language models (LLMs) downstream task performance and alignment with human values. Surprisingly, such large gains result from updating only a small subnetwork comprising…

机器学习 · 计算机科学 2025-12-19 Sagnik Mukherjee , Lifan Yuan , Dilek Hakkani-Tur , Hao Peng

This tutorial provides a comprehensive survey of methods for fine-tuning diffusion models to optimize downstream reward functions. While diffusion models are widely known to provide excellent generative modeling capability, practical…

机器学习 · 计算机科学 2024-07-19 Masatoshi Uehara , Yulai Zhao , Tommaso Biancalani , Sergey Levine

Deep learning has revolutionized various fields, yet its efficacy is hindered by overfitting and the requirement of extensive annotated data, particularly in few-shot learning scenarios where limited samples are available. This paper…

计算机视觉与模式识别 · 计算机科学 2024-12-05 Jiacheng Hu , Zhen Qi , Jianjun Wei , Jiajing Chen , Runyuan Bao , Xinyu Qiu

Reinforcement learning (RL) combines a control problem with statistical estimation: The system dynamics are not known to the agent, but can be learned through experience. A recent line of research casts `RL as inference' and suggests a…

机器学习 · 计算机科学 2020-11-05 Brendan O'Donoghue , Ian Osband , Catalin Ionescu

We apply reinforcement learning (RL) to robotics tasks. One of the drawbacks of traditional RL algorithms has been their poor sample efficiency. One approach to improve the sample efficiency is model-based RL. In our model-based RL…

机器学习 · 计算机科学 2023-05-16 Adithya Ramesh , Balaraman Ravindran

In deep reinforcement learning (RL), data augmentation is widely considered as a tool to induce a set of useful priors about semantic consistency and improve sample efficiency and generalization performance. However, even when the prior is…

机器学习 · 计算机科学 2023-03-02 Byungchan Ko , Jungseul Ok

In deep reinforcement learning (RL), data augmentation is widely considered as a tool to induce a set of useful priors about semantic consistency and improve sample efficiency and generalization performance. However, even when the prior is…

机器学习 · 计算机科学 2022-10-21 Byungchan Ko , Jungseul Ok

Reinforcement Learning (RL) has emerged as a transformative approach for aligning and enhancing Large Language Models (LLMs), addressing critical challenges in instruction following, ethical alignment, and reasoning capabilities. This…

人工智能 · 计算机科学 2025-07-08 Saksham Sahai Srivastava , Vaneet Aggarwal