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Data quality is a crucial factor in large language models training. While prior work has shown that models trained on smaller, high-quality datasets can outperform those trained on much larger but noisy or low-quality corpora, systematic…

机器学习 · 计算机科学 2026-02-17 Youwei Shu , Shaomian Zheng , Dingnan Jin , Wenjie Qu , Ziyao Guo , Qing Cui , Jun Zhou , Jiaheng Zhang

The scarcity of high-quality training data presents a fundamental bottleneck to scaling machine learning models. This challenge is particularly acute in recommendation systems, where extreme sparsity in user interactions leads to rugged…

In real-world applications with large state and action spaces, reinforcement learning (RL) typically employs function approximations to represent core components like the policies, value functions, and dynamics models. Although powerful…

机器学习 · 计算机科学 2026-01-29 Chenxiao Gao , Haotian Sun , Na Li , Dale Schuurmans , Bo Dai

In this work, we address the problem of determining reliable policies in reinforcement learning (RL), with a focus on optimization under uncertainty and the need for performance guarantees. While classical RL algorithms aim at maximizing…

机器学习 · 计算机科学 2025-10-22 Nadir Farhi

While the rapid progress of deep learning fuels end-to-end reinforcement learning (RL), direct application, especially in high-dimensional space like robotic scenarios still suffers from low sample efficiency. Therefore State Representation…

In the era of large foundation models, the quality of embeddings has become a central determinant of downstream task performance and overall system capability. Yet widely used dense embeddings are often extremely high-dimensional, incurring…

机器学习 · 计算机科学 2026-03-03 Lixuan Guo , Yifei Wang , Tiansheng Wen , Yifan Wang , Aosong Feng , Bo Chen , Stefanie Jegelka , Chenyu You

Sparse Representation (SR) techniques encode the test samples into a sparse linear combination of all training samples and then classify the test samples into the class with the minimum residual. The classification of SR techniques depends…

计算机视觉与模式识别 · 计算机科学 2019-07-01 Chun-Mei Feng , Yong Xu , Zuoyong Li , Jian Yang

Despite recent progress made by self-supervised methods in representation learning with residual networks, they still underperform supervised learning on the ImageNet classification benchmark, limiting their applicability in…

计算机视觉与模式识别 · 计算机科学 2022-11-07 Nenad Tomasev , Ioana Bica , Brian McWilliams , Lars Buesing , Razvan Pascanu , Charles Blundell , Jovana Mitrovic

Reinforcement learning (RL) is recognized as lacking generalization and robustness under environmental perturbations, which excessively restricts its application for real-world robotics. Prior work claimed that adding regularization to the…

机器学习 · 计算机科学 2023-12-06 Yuan Zhang , Jianhong Wang , Joschka Boedecker

We present Residual Policy Learning (RPL): a simple method for improving nondifferentiable policies using model-free deep reinforcement learning. RPL thrives in complex robotic manipulation tasks where good but imperfect controllers are…

机器人学 · 计算机科学 2019-01-04 Tom Silver , Kelsey Allen , Josh Tenenbaum , Leslie Kaelbling

In recommender systems, users always choose the favorite items to rate, which leads to data missing not at random and poses a great challenge for unbiased evaluation and learning of prediction models. Currently, the doubly robust (DR)…

机器学习 · 计算机科学 2023-08-25 Haoxuan Li , Chunyuan Zheng , Peng Wu

Supervised regression to demonstrations has been demonstrated to be a stable way to train deep policy networks. We are motivated to study how we can take full advantage of supervised loss functions for stably training deep reinforcement…

机器学习 · 计算机科学 2021-06-11 Daochen Zha , Kwei-Herng Lai , Kaixiong Zhou , Xia Hu

In the search for more sample-efficient reinforcement-learning (RL) algorithms, a promising direction is to leverage as much external off-policy data as possible. For instance, expert demonstrations. In the past, multiple ideas have been…

机器学习 · 计算机科学 2023-03-01 Jesus Bujalance Martin , Fabien Moutarde

Self-supervised learning (SSL) has shown significant progress in speech processing tasks. However, despite the intrinsic randomness in the Transformer structure, such as dropout variants and layer-drop, improving the model-level consistency…

音频与语音处理 · 电气工程与系统科学 2023-06-16 Ji Won Yoon , Seok Min Kim , Nam Soo Kim

In continual learning, plasticity refers to the ability of an agent to quickly adapt to new information. Neural networks are known to lose plasticity when processing non-stationary data streams. In this paper, we propose L2 Init, a simple…

机器学习 · 计算机科学 2024-10-28 Saurabh Kumar , Henrik Marklund , Benjamin Van Roy

Accurate estimation of remaining useful life (RUL) of industrial equipment can enable advanced maintenance schedules, increase equipment availability and reduce operational costs. However, existing deep learning methods for RUL prediction…

机器学习 · 计算机科学 2020-07-21 Mohamed Ragab , Zhenghua Chen , Min Wu , Chee-Keong Kwoh , Ruqiang Yan , Xiaoli Li

To obtain a near-optimal policy with fewer interactions in Reinforcement Learning (RL), a promising approach involves the combination of offline RL, which enhances sample efficiency by leveraging offline datasets, and online RL, which…

机器学习 · 计算机科学 2024-11-18 Xiaoyu Wen , Xudong Yu , Rui Yang , Haoyuan Chen , Chenjia Bai , Zhen Wang

The goal of robust constrained reinforcement learning (RL) is to optimize an agent's performance under the worst-case model uncertainty while satisfying safety or resource constraints. In this paper, we demonstrate that strong duality does…

机器学习 · 计算机科学 2025-09-23 Shaocong Ma , Ziyi Chen , Yi Zhou , Heng Huang

Traditional power grid systems have become obsolete under more frequent and extreme natural disasters. Reinforcement learning (RL) has been a promising solution for resilience given its successful history of power grid control. However,…

机器学习 · 计算机科学 2022-12-09 Zhenting Zhao , Po-Yen Chen , Yucheng Jin

We introduce the Rule-to-Tag (R2T) framework, a hybrid approach that integrates a multi-tiered system of linguistic rules directly into a neural network's training objective. R2T's novelty lies in its adaptive loss function, which includes…

计算与语言 · 计算机科学 2025-10-17 Mamadou K. Keita , Christopher Homan , Sebastien Diarra