Search Results for author: Tianyou Chai

Found 15 papers, 4 papers with code

Contouring Error Bounded Control for Biaxial Switched Linear Systems

no code implementations8 Apr 2024 Meng Yuan, Ye Wang, Chris Manzie, Zhezhuang Xu, Tianyou Chai

To address the need for improved contouring accuracy in industrial machines with position-dependent structural flexibility, this paper introduces a novel contouring error-bounded control algorithm for biaxial switched linear systems.

Model Predictive Control Position

DA-STC: Domain Adaptive Video Semantic Segmentation via Spatio-Temporal Consistency

1 code implementation22 Nov 2023 Zhe Zhang, Gaochang Wu, Jing Zhang, Chunhua Shen, DaCheng Tao, Tianyou Chai

To solve the challenge, we propose a novel DA-STC method for domain adaptive video semantic segmentation, which incorporates a bidirectional multi-level spatio-temporal fusion module and a category-aware spatio-temporal feature alignment module to facilitate consistent learning for domain-invariant features.

Representation Learning Segmentation +2

Distributed Online Convex Optimization with Adversarial Constraints: Reduced Cumulative Constraint Violation Bounds under Slater's Condition

no code implementations31 May 2023 Xinlei Yi, Xiuxian Li, Tao Yang, Lihua Xie, Yiguang Hong, Tianyou Chai, Karl H. Johansson

Moreover, if the loss functions are strongly convex, then the network regret bound is reduced to $\mathcal{O}(\log(T))$, and the network cumulative constraint violation bound is reduced to $\mathcal{O}(\sqrt{\log(T)T})$ and $\mathcal{O}(\log(T))$ without and with Slater's condition, respectively.

Data-Driven Inverse Reinforcement Learning for Expert-Learner Zero-Sum Games

no code implementations5 Jan 2023 Wenqian Xue, Bosen Lian, Jialu Fan, Tianyou Chai, Frank L. Lewis

In this paper, we formulate inverse reinforcement learning (IRL) as an expert-learner interaction whereby the optimal performance intent of an expert or target agent is unknown to a learner agent.

reinforcement-learning Reinforcement Learning (RL)

Safety-based Speed Control of a Wheelchair using Robust Adaptive Model Predictive Control

no code implementations6 Oct 2022 Meng Yuan, Ye Wang, Lei LI, Tianyou Chai, Wei Tech Ang

Electric-powered wheelchair plays an important role in providing accessibility for people with mobility impairment.

Model Predictive Control

Geo-NI: Geometry-aware Neural Interpolation for Light Field Rendering

no code implementations20 Jun 2022 Gaochang Wu, Yuemei Zhou, Yebin Liu, Lu Fang, Tianyou Chai

In this paper, we present a Geometry-aware Neural Interpolation (Geo-NI) framework for light field rendering.

Novel View Synthesis

Regret and Cumulative Constraint Violation Analysis for Online Convex Optimization with Long Term Constraints

no code implementations9 Jun 2021 Xinlei Yi, Xiuxian Li, Tao Yang, Lihua Xie, Tianyou Chai, Karl H. Johansson

A novel algorithm is first proposed and it achieves an $\mathcal{O}(T^{\max\{c, 1-c\}})$ bound for static regret and an $\mathcal{O}(T^{(1-c)/2})$ bound for cumulative constraint violation, where $c\in(0, 1)$ is a user-defined trade-off parameter, and thus has improved performance compared with existing results.

Regret and Cumulative Constraint Violation Analysis for Distributed Online Constrained Convex Optimization

no code implementations1 May 2021 Xinlei Yi, Xiuxian Li, Tao Yang, Lihua Xie, Tianyou Chai, Karl H. Johansson

This is a sequential decision making problem with two sequences of arbitrarily varying convex loss and constraint functions.

Decision Making

Revisiting Light Field Rendering with Deep Anti-Aliasing Neural Network

1 code implementation14 Apr 2021 Gaochang Wu, Yebin Liu, Lu Fang, Tianyou Chai

In this paper, we revisit the classic LF rendering framework to address both challenges by incorporating it with advanced deep learning techniques.

Depth Estimation

Light Field Reconstruction Using Convolutional Network on EPI and Extended Applications

1 code implementation24 Mar 2021 Gaochang Wu, Yebin Liu, Lu Fang, Qionghai Dai, Tianyou Chai

The main problem in direct reconstruction on the EPI involves an information asymmetry between the spatial and angular dimensions, where the detailed portion in the angular dimensions is damaged by undersampling.

Incremental Data-driven Optimization of Complex Systems in Nonstationary Environments

no code implementations14 Dec 2020 Cuie Yang, Jinliang Ding, Yaochu Jin, Tianyou Chai

Existing work on data-driven optimization focuses on problems in static environments, but little attention has been paid to problems in dynamic environments.

Ensemble Learning Outlier Detection

Spatial-Angular Attention Network for Light Field Reconstruction

1 code implementation5 Jul 2020 Gaochang Wu, Yingqian Wang, Yebin Liu, Lu Fang, Tianyou Chai

In this paper, we propose a spatial-angular attention network to perceive correspondences in the light field non-locally, and reconstruction high angular resolution light field in an end-to-end manner.

A Primal-Dual SGD Algorithm for Distributed Nonconvex Optimization

no code implementations4 Jun 2020 Xinlei Yi, Shengjun Zhang, Tao Yang, Tianyou Chai, Karl H. Johansson

The distributed nonconvex optimization problem of minimizing a global cost function formed by a sum of $n$ local cost functions by using local information exchange is considered.

Optimization and Control

Light Field Reconstruction Using Deep Convolutional Network on EPI

no code implementations CVPR 2017 Gaochang Wu, Mandan Zhao, Liangyong Wang, Qionghai Dai, Tianyou Chai, Yebin Liu

In this paper, we take advantage of the clear texture structure of the epipolar plane image (EPI) in the light field data and model the problem of light field reconstruction from a sparse set of views as a CNN-based angular detail restoration on EPI.

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