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We study a class of constrained reinforcement learning (RL) problems in which multiple constraint specifications are not identified before training. It is challenging to identify appropriate constraint specifications due to the undefined…

最优化与控制 · 数学 2024-01-02 Dongsheng Ding , Zhengyan Huan , Alejandro Ribeiro

Reinforcement learning (RL) has emerged as a powerful approach for tackling complex medical decision-making problems such as treatment planning, personalized medicine, and optimizing the scheduling of surgeries and appointments. It has…

计算与语言 · 计算机科学 2023-10-31 Ying Liu , Haozhu Wang , Huixue Zhou , Mingchen Li , Yu Hou , Sicheng Zhou , Fang Wang , Rama Hoetzlein , Rui Zhang

We study risk-sensitive reinforcement learning (RL), a crucial field due to its ability to enhance decision-making in scenarios where it is essential to manage uncertainty and minimize potential adverse outcomes. Particularly, our work…

机器学习 · 计算机科学 2024-07-11 Dake Zhang , Boxiang Lyu , Shuang Qiu , Mladen Kolar , Tong Zhang

Dynamic diagnosis is desirable when medical tests are costly or time-consuming. In this work, we use reinforcement learning (RL) to find a dynamic policy that selects lab test panels sequentially based on previous observations, ensuring…

机器学习 · 计算机科学 2023-03-01 Zheng Yu , Yikuan Li , Joseph Kim , Kaixuan Huang , Yuan Luo , Mengdi Wang

In complex environments with large discrete action spaces, effective decision-making is critical in reinforcement learning (RL). Despite the widespread use of value-based RL approaches like Q-learning, they come with a computational burden,…

机器学习 · 计算机科学 2024-05-17 Fares Fourati , Vaneet Aggarwal , Mohamed-Slim Alouini

Predicting cancer treatment outcomes requires models that are both accurate and interpretable, particularly in the presence of heterogeneous clinical data. While large language models (LLMs) have shown strong performance in biomedical NLP,…

计算与语言 · 计算机科学 2025-10-21 Raghu Vamshi Hemadri , Geetha Krishna Guruju , Kristi Topollai , Anna Ewa Choromanska

Medical report generation aims to automatically produce radiology-style reports from medical images, supporting efficient and accurate clinical decision-making.However, existing approaches predominately rely on token-level likelihood…

计算与语言 · 计算机科学 2026-03-30 Pengyu Wang , Shuchang Ye , Usman Naseem , Jinman Kim

Deep reinforcement learning (DRL) augments the reinforcement learning framework, which learns a sequence of actions that maximizes the expected reward, with the representative power of deep neural networks. Recent works have demonstrated…

图像与视频处理 · 电气工程与系统科学 2021-03-10 S. Kevin Zhou , Hoang Ngan Le , Khoa Luu , Hien V. Nguyen , Nicholas Ayache

The common purpose of applying reinforcement learning (RL) to asset management is the maximization of profit. The extrinsic reward function used to learn an optimal strategy typically does not take into account any other preferences or…

机器学习 · 计算机科学 2022-09-16 Charl Maree , Christian W. Omlin

Reinforcement Learning (RL) serves as a versatile framework for sequential decision-making, finding applications across diverse domains such as robotics, autonomous driving, recommendation systems, supply chain optimization, biology,…

机器学习 · 计算机科学 2024-08-26 Vaneet Aggarwal , Washim Uddin Mondal , Qinbo Bai

Offline reinforcement learning (RL) aims to learn an optimal policy from pre-collected data. However, it faces challenges of distributional shift, where the learned policy may encounter unseen scenarios not covered in the offline data.…

机器学习 · 计算机科学 2025-05-27 Jin Zhu , Xin Zhou , Jiaang Yao , Gholamali Aminian , Omar Rivasplata , Simon Little , Lexin Li , Chengchun Shi

Recently, reinforcement learning (RL)-based tuning has shifted the trajectory of Multimodal Large Language Models (MLLMs), particularly following the introduction of Group Relative Policy Optimization (GRPO). However, directly applying it…

计算与语言 · 计算机科学 2025-05-21 Wenhui Zhu , Xuanzhao Dong , Xin Li , Peijie Qiu , Xiwen Chen , Abolfazl Razi , Aris Sotiras , Yi Su , Yalin Wang

Effective patient monitoring is vital for timely interventions and improved healthcare outcomes. Traditional monitoring systems often struggle to handle complex, dynamic environments with fluctuating vital signs, leading to delays in…

机器学习 · 计算机科学 2024-10-30 Thanveer Shaik , Xiaohui Tao , Lin Li , Haoran Xie , Hong-Ning Dai , Feng Zhao , Jianming Yong

Reinforcement Learning (RL) has emerged as an efficient method of choice for solving complex sequential decision making problems in automatic control, computer science, economics, and biology. In this paper we present a model-free RL…

计算机科学中的逻辑 · 计算机科学 2019-09-13 Mohammadhosein Hasanbeig , Yiannis Kantaros , Alessandro Abate , Daniel Kroening , George J. Pappas , Insup Lee

Model-based reinforcement learning (RL) has proven to be a data efficient approach for learning control tasks but is difficult to utilize in domains with complex observations such as images. In this paper, we present a method for learning…

机器学习 · 计算机科学 2019-06-25 Marvin Zhang , Sharad Vikram , Laura Smith , Pieter Abbeel , Matthew J. Johnson , Sergey Levine

Recent efforts in Machine Learning (ML) interpretability have focused on creating methods for explaining black-box ML models. However, these methods rely on the assumption that simple approximations, such as linear models or decision-trees,…

机器学习 · 计算机科学 2019-06-13 Owen Lahav , Nicholas Mastronarde , Mihaela van der Schaar

The level of challenge in stroke rehabilitation has to be carefully chosen to keep the patient engaged and motivated while not frustrating them. This paper presents a simulation where this level of challenge is automatically optimized using…

系统与控制 · 电气工程与系统科学 2021-06-08 Sandra-Carina Noble , Tomas Ward , John V. Ringwood

Clinical diagnosis guidelines aim at specifying the steps that may lead to a diagnosis. Inspired by guidelines, we aim to learn the optimal sequence of actions to perform in order to obtain a correct diagnosis from electronic health…

机器学习 · 计算机科学 2023-11-16 Lillian Muyama , Antoine Neuraz , Adrien Coulet

In recent years, Reinforcement Learning (RL) has been applied to real-world problems with increasing success. Such applications often require to put constraints on the agent's behavior. Existing algorithms for constrained RL (CRL) rely on…

机器学习 · 计算机科学 2023-03-07 Ted Moskovitz , Brendan O'Donoghue , Vivek Veeriah , Sebastian Flennerhag , Satinder Singh , Tom Zahavy

One of the main goals of reinforcement learning (RL) is to provide a~way for physical machines to learn optimal behavior instead of being programmed. However, effective control of the machines usually requires fine time discretization. The…

机器学习 · 计算机科学 2022-07-12 Jakub Łyskawa , Paweł Wawrzyński