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Large language models (LLMs) demonstrate strong task-specific capabilities through fine-tuning, but merging multiple fine-tuned models often leads to degraded performance due to overlapping instruction-following components. Task Arithmetic…

Computation and Language · Computer Science 2025-02-28 Yan-Lun Chen , Yi-Ru Wei , Chia-Yi Hsu , Chia-Mu Yu , Chun-Ying Huang , Ying-Dar Lin , Yu-Sung Wu , Wei-Bin Lee

Visual Reinforcement Learning is a popular and powerful framework that takes full advantage of the Deep Learning breakthrough. It is known that variations in input domains (e.g., different panorama colors due to seasonal changes) or task…

Machine Learning · Computer Science 2025-02-19 Antonio Pio Ricciardi , Valentino Maiorca , Luca Moschella , Riccardo Marin , Emanuele Rodolà

Continual RL requires an agent to learn new tasks without forgetting previous ones, while improving on both past and future tasks. The most common approaches use model-free algorithms and replay buffers can help to mitigate catastrophic…

Machine Learning · Computer Science 2024-07-17 Luke Yang , Levin Kuhlmann , Gideon Kowadlo

Self-supervised learning has brought about a revolutionary paradigm shift in various computing domains, including NLP, vision, and biology. Recent approaches involve pre-training transformer models on vast amounts of unlabeled data, serving…

Artificial Intelligence · Computer Science 2023-12-05 Raphael Boige , Yannis Flet-Berliac , Arthur Flajolet , Guillaume Richard , Thomas Pierrot

Recently, deep reinforcement learning (RL) methods have been applied successfully to multi-agent scenarios. Typically, these methods rely on a concatenation of agent states to represent the information content required for decentralized…

Multiagent Systems · Computer Science 2019-06-07 Maximilian Hüttenrauch , Adrian Šošić , Gerhard Neumann

Vision Language Action models (VLAs) trained with policy-based reinforcement learning (RL) encode complex behaviors without explicitly modeling environmental dynamics. However, it remains unclear whether VLAs implicitly learn world models,…

Machine Learning · Computer Science 2025-09-30 Marco Molinari , Leonardo Nevali , Saharsha Navani , Omar G. Younis

Deep Reinforcement Learning (or just "RL") is gaining popularity for industrial and research applications. However, it still suffers from some key limits slowing down its widespread adoption. Its performance is sensitive to initial…

Machine Learning · Computer Science 2022-08-31 Pierrick Pochelu , Serge G. Petiton , Bruno Conche

The capacity for rapid domain adaptation is important to increasing the applicability of reinforcement learning (RL) to real world problems. Generalization of RL agents is critical to success in the real world, yet zero-shot policy transfer…

Machine Learning · Computer Science 2022-09-13 Taylor Hearn , Sravan Jayanthi , Sehoon Ha

Reinforcement Learning (RL) enables an intelligent agent to optimise its performance in a task by continuously taking action from an observed state and receiving a feedback from the environment in form of rewards. RL typically uses tables…

Artificial Intelligence · Computer Science 2025-01-28 Alberto Castagna

Reinforcement Learning (RL) has emerged as a powerful paradigm for training LLM-based agents, yet remains limited by low sample efficiency, stemming not only from sparse outcome feedback but also from the agent's inability to leverage prior…

Machine Learning · Computer Science 2026-03-19 Dilxat Muhtar , Jiashun Liu , Wei Gao , Weixun Wang , Shaopan Xiong , Ju Huang , Siran Yang , Wenbo Su , Jiamang Wang , Ling Pan , Bo Zheng

Reinforcement learning agents in complex game environments often suffer from sparse rewards, training instability, and poor sample efficiency. This paper presents a hybrid training approach that combines offline imitation learning with…

Machine Learning · Computer Science 2025-09-19 Thomas Ackermann , Moritz Spang , Hamza A. A. Gardi

Merging models becomes a fundamental procedure in some applications that consider model efficiency and robustness. The training randomness or Non-I.I.D. data poses a huge challenge for averaging-based model fusion. Previous research efforts…

Artificial Intelligence · Computer Science 2024-08-23 Yichu Xu , Xin-Chun Li , Le Gan , De-Chuan Zhan

Solving long-horizon goal-conditioned tasks remains a significant challenge in reinforcement learning (RL). Hierarchical reinforcement learning (HRL) addresses this by decomposing tasks into more manageable sub-tasks, but the automatic…

Machine Learning · Computer Science 2025-09-09 Yang Yu

Deep Reinforcement Learning has been able to achieve amazing successes in a variety of domains from video games to continuous control by trying to maximize the cumulative reward. However, most of these successes rely on algorithms that…

Machine Learning · Computer Science 2017-09-15 Rakesh R Menon , Balaraman Ravindran

Real-world reinforcement learning (RL) environments, whether in robotics or industrial settings, often involve non-visual observations and require not only efficient but also reliable and thus interpretable and flexible RL approaches. To…

Machine Learning · Computer Science 2024-02-19 Moritz Lange , Noah Krystiniak , Raphael C. Engelhardt , Wolfgang Konen , Laurenz Wiskott

Reinforcement learning (RL) algorithms typically start tabula rasa, without any prior knowledge of the environment, and without any prior skills. This however often leads to low sample efficiency, requiring a large amount of interaction…

Machine Learning · Computer Science 2020-07-13 Matthias Hutsebaut-Buysse , Kevin Mets , Steven Latré

The success of Reinforcement Learning (RL) heavily relies on the ability to learn robust representations from the observations of the environment. In most cases, the representations learned purely by the reinforcement learning loss can…

Machine Learning · Computer Science 2024-02-12 Somjit Nath , Rushiv Arora , Samira Ebrahimi Kahou

The aim of Reinforcement Learning (RL) in real-world applications is to create systems capable of making autonomous decisions by learning from their environment through trial and error. This paper emphasizes the importance of reward…

Machine Learning · Computer Science 2024-12-31 Sinan Ibrahim , Mostafa Mostafa , Ali Jnadi , Hadi Salloum , Pavel Osinenko

Intelligent agents rely heavily on prior experience when learning a new task, yet most modern reinforcement learning (RL) approaches learn every task from scratch. One approach for leveraging prior knowledge is to transfer skills learned on…

Machine Learning · Computer Science 2020-10-23 Karl Pertsch , Youngwoon Lee , Joseph J. Lim

Reinforcement learning (RL) is currently used in various real-life applications. RL-based solutions have the potential to generically address problems, including the ones that are difficult to solve with heuristics and meta-heuristics and,…

Machine Learning · Computer Science 2022-11-24 Rafael F. Reale , Joberto S. B. Martins