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Offline reinforcement learning requires reconciling two conflicting aims: learning a policy that improves over the behavior policy that collected the dataset, while at the same time minimizing the deviation from the behavior policy so as to…

机器学习 · 计算机科学 2021-10-13 Ilya Kostrikov , Ashvin Nair , Sergey Levine

Widely-used deep reinforcement learning algorithms have been shown to fail in the batch setting--learning from a fixed data set without interaction with the environment. Following this result, there have been several papers showing…

机器学习 · 计算机科学 2019-10-07 Scott Fujimoto , Edoardo Conti , Mohammad Ghavamzadeh , Joelle Pineau

This paper develops an inverse reinforcement learning algorithm aimed at recovering a reward function from the observed actions of an agent. We introduce a strategy to flexibly handle different types of actions with two approximations of…

机器学习 · 计算机科学 2017-07-26 Kun Li , Yanan Sui , Joel W. Burdick

Reinforcement learning (RL) is a powerful machine learning technique that enables an intelligent agent to learn an optimal policy that maximizes the cumulative rewards in sequential decision making. Most of methods in the existing…

机器学习 · 统计学 2023-01-06 Chengchun Shi , Zhengling Qi , Jianing Wang , Fan Zhou

In this paper, we confront the problem of applying reinforcement learning to agents that perceive the environment through many sensors and that can perform parallel actions using many actuators as is the case in complex autonomous robots.…

人工智能 · 计算机科学 2011-07-04 E. Celaya , J. M. Porta

Deep reinforcement learning can learn effective policies for a wide range of tasks, but is notoriously difficult to use due to instability and sensitivity to hyperparameters. The reasons for this remain unclear. When using standard…

机器学习 · 计算机科学 2020-03-17 Aviral Kumar , Abhishek Gupta , Sergey Levine

We present a general convergent class of reinforcement learning algorithms that is founded on two distinct principles: (1) mapping value estimates to a different space using arbitrary functions from a broad class, and (2) linearly…

机器学习 · 计算机科学 2022-03-18 Mehdi Fatemi , Arash Tavakoli

Reinforcement learning has gained wide popularity as a technique for simulation-driven approximate dynamic programming. A less known aspect is that the very reasons that make it effective in dynamic programming can also be leveraged for…

机器学习 · 计算机科学 2013-11-13 Vivek S. Borkar , Adwaitvedant S. Mathkar

Reinforcement Learning has suffered from poor reward specification, and issues for reward hacking even in simple enough domains. Preference Based Reinforcement Learning attempts to solve the issue by utilizing binary feedbacks on queried…

人工智能 · 计算机科学 2023-02-20 Mudit Verma , Subbarao Kambhampati

Multimodal large language models (MLLMs) struggle with numerical regression under long-tailed target distributions. Token-level supervised fine-tuning (SFT) and point-wise regression rewards bias learning toward high-density regions,…

计算与语言 · 计算机科学 2026-05-12 Yao Du , Shanshan Song , Xiaomeng Li

While research of reinforcement learning applied to financial markets predominantly concentrates on finding optimal behaviours, it is worth to realize that the reinforcement learning returns $G_t$ and state value functions themselves are of…

统计金融 · 定量金融 2024-05-21 Colin D. Grab

Distributional reinforcement learning (DRL) is a recent reinforcement learning framework whose success has been supported by various empirical studies. It relies on the key idea of replacing the expected return with the return distribution,…

机器学习 · 计算机科学 2020-01-09 Rahul Singh , Keuntaek Lee , Yongxin Chen

We consider the problem of imitation learning from a finite set of expert trajectories, without access to reinforcement signals. The classical approach of extracting the expert's reward function via inverse reinforcement learning, followed…

机器学习 · 计算机科学 2019-06-10 Ruohan Wang , Carlo Ciliberto , Pierluigi Amadori , Yiannis Demiris

Reinforcement learning provides a powerful and general framework for decision making and control, but its application in practice is often hindered by the need for extensive feature and reward engineering. Deep reinforcement learning…

机器学习 · 计算机科学 2018-08-15 Justin Fu , Katie Luo , Sergey Levine

This paper contributes a new approach for distributional reinforcement learning which elucidates a clean separation of transition structure and reward in the learning process. Analogous to how the successor representation (SR) describes the…

Distributional reinforcement learning demonstrates state-of-the-art performance in continuous and discrete control settings with the features of variance and risk, which can be used to explore. However, the exploration method employing the…

机器学习 · 计算机科学 2022-07-04 Jihwan Oh , Joonkee Kim , Se-Young Yun

In this work we present a new agent architecture, called Reactor, which combines multiple algorithmic and architectural contributions to produce an agent with higher sample-efficiency than Prioritized Dueling DQN (Wang et al., 2016) and…

人工智能 · 计算机科学 2018-06-20 Audrunas Gruslys , Will Dabney , Mohammad Gheshlaghi Azar , Bilal Piot , Marc Bellemare , Remi Munos

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…

机器学习 · 计算机科学 2024-02-12 Somjit Nath , Rushiv Arora , Samira Ebrahimi Kahou

For many reinforcement learning (RL) applications, specifying a reward is difficult. This paper considers an RL setting where the agent obtains information about the reward only by querying an expert that can, for example, evaluate…

机器学习 · 计算机科学 2022-02-01 David Lindner , Matteo Turchetta , Sebastian Tschiatschek , Kamil Ciosek , Andreas Krause

Deep Q Network (DQN) firstly kicked the door of deep reinforcement learning (DRL) via combining deep learning (DL) with reinforcement learning (RL), which has noticed that the distribution of the acquired data would change during the…

机器学习 · 计算机科学 2022-01-11 Jiajun Fan , Changnan Xiao , Yue Huang