Search Results for author: Zirui Xu

Found 16 papers, 1 papers with code

Out-of-Distribution Detection via Deep Multi-Comprehension Ensemble

no code implementations24 Mar 2024 Chenhui Xu, Fuxun Yu, Zirui Xu, Nathan Inkawhich, Xiang Chen

Our experimental results demonstrate the superior performance of the MC Ensemble strategy in OOD detection compared to both the naive Deep Ensemble method and a standalone model of comparable size.

Out-of-Distribution Detection

QuadraNet: Improving High-Order Neural Interaction Efficiency with Hardware-Aware Quadratic Neural Networks

no code implementations29 Nov 2023 Chenhui Xu, Fuxun Yu, Zirui Xu, ChenChen Liu, JinJun Xiong, Xiang Chen

Recent progress in computer vision-oriented neural network designs is mostly driven by capturing high-order neural interactions among inputs and features.

Hardware Aware Neural Architecture Search Neural Architecture Search

Leveraging Untrustworthy Commands for Multi-Robot Coordination in Unpredictable Environments: A Bandit Submodular Maximization Approach

no code implementations28 Sep 2023 Zirui Xu, Xiaofeng Lin, Vasileios Tzoumas

MetaBSG leverages a meta-algorithm to learn whether the robots should follow the commands or a recently developed submodular coordination algorithm, Bandit Sequential Greedy (BSG) [1], which has performance guarantees even in unpredictable and partially-observable environments.

Bandit Submodular Maximization for Multi-Robot Coordination in Unpredictable and Partially Observable Environments

1 code implementation22 May 2023 Zirui Xu, Xiaofeng Lin, Vasileios Tzoumas

We are motivated by the future of autonomy that involves multiple robots coordinating actions in dynamic, unstructured, and partially observable environments to complete complex tasks such as target tracking, environmental mapping, and area monitoring.

Efficient Online Learning with Memory via Frank-Wolfe Optimization: Algorithms with Bounded Dynamic Regret and Applications to Control

no code implementations2 Jan 2023 HongYu Zhou, Zirui Xu, Vasileios Tzoumas

In this paper, we enable projection-free online learning within the framework of Online Convex Optimization with Memory (OCO-M) -- OCO-M captures how the history of decisions affects the current outcome by allowing the online learning loss functions to depend on both current and past decisions.

Time Series Time Series Prediction

Online Submodular Coordination with Bounded Tracking Regret: Theory, Algorithm, and Applications to Multi-Robot Coordination

no code implementations26 Sep 2022 Zirui Xu, HongYu Zhou, Vasileios Tzoumas

We are motivated by the future of autonomy that involves multiple robots coordinating in dynamic, unstructured, and adversarial environments to complete complex tasks such as target tracking, environmental mapping, and area monitoring.

QuadraLib: A Performant Quadratic Neural Network Library for Architecture Optimization and Design Exploration

no code implementations1 Apr 2022 Zirui Xu, Fuxun Yu, JinJun Xiong, Xiang Chen

The significant success of Deep Neural Networks (DNNs) is highly promoted by the multiple sophisticated DNN libraries.

Fed2: Feature-Aligned Federated Learning

no code implementations28 Nov 2021 Fuxun Yu, Weishan Zhang, Zhuwei Qin, Zirui Xu, Di Wang, ChenChen Liu, Zhi Tian, Xiang Chen

Federated learning learns from scattered data by fusing collaborative models from local nodes.

Federated Learning

Heterogeneous Federated Learning

no code implementations15 Aug 2020 Fuxun Yu, Weishan Zhang, Zhuwei Qin, Zirui Xu, Di Wang, ChenChen Liu, Zhi Tian, Xiang Chen

Specifically, we design a feature-oriented regulation method ({$\Psi$-Net}) to ensure explicit feature information allocation in different neural network structures.

Federated Learning

Helios: Heterogeneity-Aware Federated Learning with Dynamically Balanced Collaboration

no code implementations3 Dec 2019 Zirui Xu, Zhao Yang, JinJun Xiong, Jianlei Yang, Xiang Chen

In this paper, we propose Helios, a heterogeneity-aware FL framework to tackle the straggler issue.

Distributed, Parallel, and Cluster Computing

LanCe: A Comprehensive and Lightweight CNN Defense Methodology against Physical Adversarial Attacks on Embedded Multimedia Applications

no code implementations17 Oct 2019 Zirui Xu, Fuxun Yu, Xiang Chen

Based on the detection result, we further propose a data recovery methodology to defend the physical adversarial attacks.

Adversarial Attack

Censored Stable Subordinators and Fractional Derivatives

no code implementations17 Jun 2019 Qiang Du, Lorenzo Toniazzi, Zirui Xu

Based on the popular Caputo fractional derivative of order $\beta$ in $(0, 1)$, we define the censored fractional derivative on the positive half-line $\mathbb R_+$.

Classical Analysis and ODEs Probability 26A33, 60G52, 60G40

DoPa: A Comprehensive CNN Detection Methodology against Physical Adversarial Attacks

no code implementations21 May 2019 Zirui Xu, Fuxun Yu, Xiang Chen

To address this issue, we propose DoPa -- a comprehensive CNN detection methodology for various physical adversarial attacks.

Adversarial Attack Detection

Towards Robust Training of Neural Networks by Regularizing Adversarial Gradients

no code implementations23 May 2018 Fuxun Yu, Zirui Xu, Yanzhi Wang, ChenChen Liu, Xiang Chen

In recent years, neural networks have demonstrated outstanding effectiveness in a large amount of applications. However, recent works have shown that neural networks are susceptible to adversarial examples, indicating possible flaws intrinsic to the network structures.

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