Search Results for author: Li Yu

Found 25 papers, 2 papers with code

Cross-Fusion Rule for Personalized Federated Learning

no code implementations6 Feb 2023 Wangzhuo Yang, Bo Chen, Yijun Shen, Jiong Liu, Li Yu

To overcome these challenges, a multi-layer multi-fusion strategy framework is proposed in this paper, i. e., the server adopts the network layer parameters of each client upload model as the basic unit of fusion for information-sharing calculation.

Personalized Federated Learning

Learning stability of partially observed switched linear systems

no code implementations19 Jan 2023 Zheming Wang, Raphaël M. Jungers, Mihály Petreczky, Bo Chen, Li Yu

In this paper, we propose an algorithm for deciding stability of switched linear systems under arbitrary switching based purely on observed output data.

Learning Theory

Hand Gesture Recognition through Reflected Infrared Light Wave Signals

no code implementations14 Jan 2023 Li Yu, Hisham Abuella, Md Zobaer Islam, John F. O'Hara, Christopher Crick, Sabit Ekin

In this study, we present a wireless (non-contact) gesture recognition method using only incoherent light wave signals reflected from a human subject.

Hand Gesture Recognition Hand-Gesture Recognition

Secure Fusion Estimation Against FDI Sensor Attacks in Cyber-Physical Systems

no code implementations30 Dec 2022 Bo Chen, Pindi Weng, Daniel W. C. Ho, Li Yu

This paper is concerned with the problem of secure multi-sensors fusion estimation for cyber-physical systems, where sensor measurements may be tampered with by false data injection (FDI) attacks.

End-to-end Transformer for Compressed Video Quality Enhancement

no code implementations25 Oct 2022 Li Yu, Wenshuai Chang, Shiyu Wu, Moncef Gabbouj

In this work, we propose a transformer-based compressed video quality enhancement (TVQE) method, consisting of Swin-AutoEncoder based Spatio-Temporal feature Fusion (SSTF) module and Channel-wise Attention based Quality Enhancement (CAQE) module.

How to Define the Propagation Environment Semantics and Its Application in Scatterer-Based Beam Prediction

no code implementations17 Sep 2022 Yutong Sun, Jianhua Zhang, Li Yu, Zhen Zhang, Ping Zhang

Inspired by task-oriented semantic communication and machine learning (ML) powered environment-channel mapping methods, this work aims to provide a new view of the environment from the semantic level, which defines the propagation environment semantics (PES) as a limited set of propagation environment semantic symbols (PESS) for diverse application tasks.

Distributed Event-Triggered Nonlinear Fusion Estimation under Resource Constraints

no code implementations3 Aug 2022 Rusheng Wang, Bo Chen, Zhongyao Hu, Li Yu

This paper studies the event-triggered distributed fusion estimation problems for a class of nonlinear networked multisensor fusion systems without noise statistical characteristics.

Dimensionality Reduction

Frequency-Angle Two-Dimensional Reflection Coefficient Modeling Based on Terahertz Channel Measurement

no code implementations11 Jul 2022 Zhaowei Chang, Jianhua Zhang, Pan Tang, Lei Tian, Li Yu, Guangyi Liu, Liang Xia

In this letter, the reflection coefficient of the THz channel is researched based on extensive measurement campaigns.

C2FTrans: Coarse-to-Fine Transformers for Medical Image Segmentation

1 code implementation29 Jun 2022 Xian lin, Li Yu, Kwang-Ting Cheng, Zengqiang Yan

However, most recent transformer-based methods for medical image segmentation directly apply vanilla transformers as an auxiliary module in CNN-based methods, resulting in severe detail loss due to the rigid patch partitioning scheme in transformers.

Image Segmentation Medical Image Segmentation +1

Federated Learning with Imbalanced and Agglomerated Data Distribution for Medical Image Classification

no code implementations28 Jun 2022 Nannan Wu, Li Yu, Xin Yang, Kwang-Ting Cheng, Zengqiang Yan

Inspired by real medical imaging datasets, we identify and formulate a new and more realistic data distribution denoted as L2 distribution where global class distribution is highly imbalanced and data distributions across clients are imbalanced but forming a certain degree of data agglomeration.

Contrastive Learning Federated Learning +3

Distributed Estimation for Interconnected Systems with Arbitrary Coupling Structures

no code implementations1 Jun 2022 Yuchen Zhang, Bo Chen, Li Yu, Daniel W. C. Ho

By merging these subsystem-level stability conditions and the optimization-based estimator gain design, the distributed, stable and optimal estimators are proposed.

Adversarial Learning for Incentive Optimization in Mobile Payment Marketing

no code implementations28 Dec 2021 Xuanying Chen, Zhining Liu, Li Yu, Sen Li, Lihong Gu, Xiaodong Zeng, Yize Tan, Jinjie Gu

This bias deteriorates the performance of the response model and misleads the linear programming process, dramatically degrading the performance of the resulting allocation policy.


Kalman-Like Filter under Binary Sensors

no code implementations27 Oct 2021 Zhongyao Hu, Bo Chen, Yuchen Zhang, Li Yu

When considering linear dynamic systems, a conservative estimation error covariance with adjustable parameters is constructed by matrix inequality, and then an optimal filter gain is derived by minimizing its trace.

Enhanced Sequential Covariance Intersection Fusion

no code implementations13 Oct 2021 Zhongyao Hu, Bo Chen, Wen-An Zhang, Li Yu

For this criterion, it is proved that the fusion results are not affected by the fusion structure, and thus the fusion performance can be guaranteed.

Discrete-continuous Action Space Policy Gradient-based Attention for Image-Text Matching

no code implementations CVPR 2021 ShiYang Yan, Li Yu, Yuan Xie

We propose a novel attention scheme which projects the image and text embedding into a common space and optimises the attention weights directly towards the evaluation metrics.

Text Matching

A generalization of moment-angle manifolds with non-contractible orbit spaces

no code implementations20 Nov 2020 Li Yu

This generalizes the Hochster's formula for the moment-angle manifold over a simple convex polytope.

Algebraic Topology Geometric Topology 57S12 (Primary) 57N65, 57S17, 57S25 (Secondary)

Noisy Student Training using Body Language Dataset Improves Facial Expression Recognition

no code implementations6 Aug 2020 Vikas Kumar, Shivansh Rao, Li Yu

Facial expression recognition from videos in the wild is a challenging task due to the lack of abundant labelled training data.

Facial Expression Recognition (FER)

Gesture Recognition using Reflected Visible and Infrared Light Wave Signals

no code implementations16 Jul 2020 Li Yu, Hisham Abuella, Md Zobaer Islam, John F. O'Hara, Christopher Crick, Sabit Ekin

In this paper, we demonstrate the ability to recognize hand gestures in a non-contact, wireless fashion using only incoherent light signals reflected from a human subject.

Hand Gesture Recognition Hand-Gesture Recognition

DA4AD: End-to-End Deep Attention-based Visual Localization for Autonomous Driving

no code implementations ECCV 2020 Yao Zhou, Guowei Wan, Shenhua Hou, Li Yu, Gang Wang, Xiaofei Rui, Shiyu Song

We present a visual localization framework based on novel deep attention aware features for autonomous driving that achieves centimeter level localization accuracy.

Autonomous Driving Deep Attention +1

Skull-RCNN: A CNN-based network for the skull fracture detection

no code implementations MIDL 2019 Zhuo Kuang, Xianbo Deng, Li Yu, Hang Zhang, Xian lin, Hui Ma

Guiding by the morphological features of the skull, a skeleton-based region proposal method is proposed to make candidate boxes more concentrated in key regions and reduce invalid boxes.

Region Proposal

Accelerate CU Partition in HEVC using Large-Scale Convolutional Neural Network

no code implementations23 Sep 2018 Chenying Wang, Li Yu, Shengwei Wang

High efficiency video coding (HEVC) suffers high encoding computational complexity, partly attributed to the rate-distortion optimization quad-tree search in CU partition decision.

Context-Aware Online Learning for Course Recommendation of MOOC Big Data

no code implementations11 Oct 2016 Yifan Hou, Pan Zhou, Ting Wang, Li Yu, Yuchong Hu, Dapeng Wu

In this respect, the key challenge is how to realize personalized course recommendation as well as to reduce the computing and storage costs for the tremendous course data.

Recommendation Systems

Monocular Urban Localization using Street View

no code implementations17 May 2016 Li Yu, Cyril Joly, Guillaume Bresson, Fabien Moutarde

This paper presents a metric global localization in the urban environment only with a monocular camera and the Google Street View database.

Pose Estimation

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