Search Results for author: Yujie Yang

Found 17 papers, 6 papers with code

Scalable Synthesis of Formally Verified Neural Value Function for Hamilton-Jacobi Reachability Analysis

no code implementations30 Jul 2024 Yujie Yang, Hanjiang Hu, Tianhao Wei, Shengbo Eben Li, Changliu Liu

Our framework successfully synthesizes verified neural value functions on all tasks, and our proposed three techniques exhibit superior scalability and efficiency compared with existing methods.

Rocket Landing Control with Random Annealing Jump Start Reinforcement Learning

no code implementations21 Jul 2024 YuXuan Jiang, Yujie Yang, Zhiqian Lan, Guojian Zhan, Shengbo Eben Li, Qi Sun, Jian Ma, Tianwen Yu, Changwu Zhang

Our approach, called Random Annealing Jump Start (RAJS), is tailored for real-world goal-oriented problems by leveraging prior feedback controllers as guide policy to facilitate environmental exploration and policy learning in RL.

reinforcement-learning Reinforcement Learning +1

EPIDetect: Video-based convulsive seizure detection in chronic epilepsy mouse model for anti-epilepsy drug screening

no code implementations31 May 2024 Junming Ren, Zhoujian Xiao, Yujia Zhang, Yujie Yang, Ling He, Ezra Yoon, Stephen Temitayo Bello, Xi Chen, Dapeng Wu, Micky Tortorella, Jufang He

In the preclinical translational studies, drug candidates with remarkable anti-epileptic efficacy demonstrate long-term suppression of spontaneous recurrent seizures (SRSs), particularly convulsive seizures (CSs), in mouse models of chronic epilepsy.

Seizure Detection

Controllability Test for Nonlinear Datatic Systems

no code implementations15 May 2024 Yujie Yang, Letian Tao, Likun Wang, Shengbo Eben Li

While controllability test is well established in modelic (i. e., model-driven) control systems, extending it to datatic (i. e., data-driven) control systems is still a challenging task due to the absence of system models.

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 +1

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 +3

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

no code implementations 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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