Search Results for author: Yujie Yang

Found 13 papers, 7 papers with code

The Feasibility of Constrained Reinforcement Learning Algorithms: A Tutorial Study

no code implementations15 Apr 2024 Yujie Yang, Zhilong Zheng, Shengbo Eben Li, Masayoshi Tomizuka, Changliu Liu

We demonstrate our feasibility theory by visualizing different feasible regions under both MPC and RL policies in an emergency braking control task.

Model Predictive Control reinforcement-learning +1

SAM-DiffSR: Structure-Modulated Diffusion Model for Image Super-Resolution

1 code implementation27 Feb 2024 Chengcheng Wang, Zhiwei Hao, Yehui Tang, Jianyuan Guo, Yujie Yang, Kai Han, Yunhe Wang

In this paper, we propose the SAM-DiffSR model, which can utilize the fine-grained structure information from SAM in the process of sampling noise to improve the image quality without additional computational cost during inference.

Image Super-Resolution

DenseMamba: State Space Models with Dense Hidden Connection for Efficient Large Language Models

1 code implementation26 Feb 2024 wei he, Kai Han, Yehui Tang, Chengcheng Wang, Yujie Yang, Tianyu Guo, Yunhe Wang

Large language models (LLMs) face a daunting challenge due to the excessive computational and memory requirements of the commonly used Transformer architecture.

On the Stability of Datatic Control Systems

no code implementations30 Jan 2024 Yujie Yang, Zhilong Zheng, Shengbo Eben Li

This information restricts the time derivative of any unknown state to the intersection of a set of closed balls.

Safe Offline Reinforcement Learning with Feasibility-Guided Diffusion Model

1 code implementation19 Jan 2024 Yinan Zheng, Jianxiong Li, Dongjie Yu, Yujie Yang, Shengbo Eben Li, Xianyuan Zhan, Jingjing Liu

Interestingly, we discover that via reachability analysis of safe-control theory, the hard safety constraint can be equivalently translated to identifying the largest feasible region given the offline dataset.

Offline RL reinforcement-learning

Safe Reinforcement Learning with Dual Robustness

no code implementations13 Sep 2023 Zeyang Li, Chuxiong Hu, Yunan Wang, Yujie Yang, Shengbo Eben Li

To address this issue, we propose a systematic framework to unify safe RL and robust RL, including problem formulation, iteration scheme, convergence analysis and practical algorithm design.

reinforcement-learning Reinforcement Learning (RL) +2

S3IM: Stochastic Structural SIMilarity and Its Unreasonable Effectiveness for Neural Fields

1 code implementation ICCV 2023 Zeke Xie, Xindi Yang, Yujie Yang, Qi Sun, Yixiang Jiang, Haoran Wang, Yunfeng Cai, Mingming Sun

Recently, Neural Radiance Field (NeRF) has shown great success in rendering novel-view images of a given scene by learning an implicit representation with only posed RGB images.

Novel View Synthesis Surface Reconstruction

Feasible Policy Iteration

no code implementations18 Apr 2023 Yujie Yang, Zhilong Zheng, Shengbo Eben Li, Jingliang Duan, Jingjing Liu, Xianyuan Zhan, Ya-Qin Zhang

To address this challenge, we propose an indirect safe RL framework called feasible policy iteration, which guarantees that the feasible region monotonically expands and converges to the maximum one, and the state-value function monotonically improves and converges to the optimal one.

Reinforcement Learning (RL) Safe Reinforcement Learning

McNet: Fuse Multiple Cues for Multichannel Speech Enhancement

1 code implementation16 Nov 2022 Yujie Yang, Changsheng Quan, Xiaofei Li

In multichannel speech enhancement, both spectral and spatial information are vital for discriminating between speech and noise.

Speech Enhancement

Joint LED Selection and Precoding Optimization for Multiple-User Multiple-Cell VLC Systems

no code implementations29 Aug 2021 Yang Yang, Yujie Yang, Mingzhe Chen, Chunyan Feng, Hailun Xia, Shuguang Cui, H. Vincent Poor

First, a MU-MC-VLC system model is established, and then a sum-rate maximization problem under dimming level and illumination uniformity constraints is formulated.

Steadily Learn to Drive with Virtual Memory

no code implementations16 Feb 2021 Yuhang Zhang, Yao Mu, Yujie Yang, Yang Guan, Shengbo Eben Li, Qi Sun, Jianyu Chen

Reinforcement learning has shown great potential in developing high-level autonomous driving.

Autonomous Driving

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