Search Results for author: Weijia Wang

Found 17 papers, 5 papers with code

Photoplethysmography based atrial fibrillation detection: an updated review from July 2019

no code implementations22 Oct 2023 Cheng Ding, Ran Xiao, Weijia Wang, Elizabeth Holdsworth, Xiao Hu

This paper offers a comprehensive review of the latest advancements in PPG-based AF detection, utilizing digital health and artificial intelligence (AI) solutions, within the timeframe spanning from July 2019 to December 2022.

Atrial Fibrillation Detection Photoplethysmography (PPG)

A Practical Recipe for Federated Learning Under Statistical Heterogeneity Experimental Design

1 code implementation28 Jul 2023 Mahdi Morafah, Weijia Wang, Bill Lin

Many of the works use inconsistent experimental settings and there are no comprehensive studies on the effect of FL-specific experimental variables on the results and practical insights for a more comparable and consistent FL experimental setup.

Experimental Design Federated Learning

Safety Guaranteed Control for Spacecraft Inspection Mission

no code implementations8 Jun 2023 Kun Wang, Tao Meng, Jiakun Lei, Weijia Wang

In order to address this issue, we propose a control strategy based on control barrier functions, summarized as "safety check on kinematics" and "velocity tracking on dynamics" approach.

Adaptive Compatible Performance Control for Spacecraft Attitude Control under Motion Constraints with Guaranteed Accuracy

no code implementations31 May 2023 Jiakun Lei, Tao Meng, Yang Zhu, Kun Wang, Weijia Wang

To tackle this problem, we propose a modified framework called Compatible Performance Control (CPC), which integrates the Prescribed Performance Control (PPC) scheme with a contradiction detection and alleviation strategy.

Composite Triggered Intermittent Control for Constrained Spacecraft Attitude Tracking

no code implementations31 May 2023 Jiakun Lei, Tao Meng, Kun Wang, Weijia Wang, Shujian Sun

Further, the basic intermittent attitude controller is extended to a "constrained version" by introducing a strictly bounded virtual control law and an input saturation compensation auxiliary system.

Philosophy

Weighted Point Cloud Normal Estimation

no code implementations6 May 2023 Weijia Wang, Xuequan Lu, Di Shao, Xiao Liu, Richard Dazeley, Antonio Robles-Kelly, Wei Pan

Existing normal estimation methods for point clouds are often less robust to severe noise and complex geometric structures.

Contrastive Learning regression

When Do Curricula Work in Federated Learning?

no code implementations ICCV 2023 Saeed Vahidian, Sreevatsank Kadaveru, Woonjoon Baek, Weijia Wang, Vyacheslav Kungurtsev, Chen Chen, Mubarak Shah, Bill Lin

Specifically, we aim to investigate how ordered learning principles can contribute to alleviating the heterogeneity effects in FL.

Federated Learning

Event-Triggered Intermittent Prescribed Performance Control for Spacecraft Attitude Reorientation

no code implementations10 Nov 2022 Jiakun Lei, Tao Meng, Kun Wang, Weijia Wang, Zhonghe Jin

The prescribed performance control (PPC) scheme is often employed for the control with guaranteed performance.

Neural Routing in Meta Learning

1 code implementation14 Oct 2022 Jicang Cai, Saeed Vahidian, Weijia Wang, Mohsen Joneidi, Bill Lin

Inspired by the widely recognized finding in neuroscience that distinct parts of the brain are highly specialized for different types of tasks, we aim to improve the model performance of the current meta learning algorithms by selectively using only parts of the model conditioned on the input tasks.

Meta-Learning

Efficient Distribution Similarity Identification in Clustered Federated Learning via Principal Angles Between Client Data Subspaces

1 code implementation21 Sep 2022 Saeed Vahidian, Mahdi Morafah, Weijia Wang, Vyacheslav Kungurtsev, Chen Chen, Mubarak Shah, Bill Lin

This small set of principal vectors is provided to the server so that the server can directly identify distribution similarities among the clients to form clusters.

Federated Learning

Robust Control For Spacecraft Attitude Tracking Under Multiple Physical Limitations with Guaranteed Performance

no code implementations13 Sep 2022 Jiakun Lei, Tao Meng, Weijia Wang, Chengjin Yin, Zhonghe Jin

Based on the proposed structure, a backstepping controller is developed accordingly using a double-layer PPC framework.

Spacecraft Attitude Pointing Control under Pointing Forbidden Constraints with Guaranteed Accuracy

no code implementations13 Sep 2022 Jiakun Lei, Tao Meng, Weijia Wang, Shujian Sun, Heng Li, Zhonghe Jin

To resolve this problem, a switching controller structure is proposed in this paper based on the reduced-attitude representation, fusing the artificial potential field (APF) methodology and the Prescribed Performance Control (PPC) scheme together.

FLIS: Clustered Federated Learning via Inference Similarity for Non-IID Data Distribution

1 code implementation20 Aug 2022 Mahdi Morafah, Saeed Vahidian, Weijia Wang, Bill Lin

Classical federated learning approaches yield significant performance degradation in the presence of Non-IID data distributions of participants.

Personalized Federated Learning

Deep Point Cloud Normal Estimation via Triplet Learning

no code implementations20 Oct 2021 Weijia Wang, Xuequan Lu, Dasith de Silva Edirimuni, Xiao Liu, Antonio Robles-Kelly

It consists of two phases: (a) feature encoding which learns representations of local patches, and (b) normal estimation that takes the learned representation as input and regresses the normal vector.

Learning Accurate and Interpretable Decision Rule Sets from Neural Networks

1 code implementation4 Mar 2021 Litao Qiao, Weijia Wang, Bill Lin

Each neuron in the first layer directly maps to an interpretable if-then rule after training, and the output neuron in the second layer directly maps to a disjunction of the first-layer rules to form the decision rule set.

General Classification

Reduced expression of minimal infinite reduced words of affine Weyl groups

no code implementations27 Jan 2020 Weijia Wang

For an infinite Coxeter system, one can extend the weak right order to the set of infinite reduced words.

Group Theory Representation Theory

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