Search Results for author: Chao Hu

Found 18 papers, 5 papers with code

An interpretable deep learning method for bearing fault diagnosis

no code implementations20 Aug 2023 Hao Lu, Austin M. Bray, Chao Hu, Andrew T. Zimmerman, Hongyi Xu

During the model evaluation process, the proposed approach retrieves prediction basis samples from the health library according to the similarity of the feature importance.

Feature Importance

Predicting Battery Lifetime Under Varying Usage Conditions from Early Aging Data

no code implementations17 Jul 2023 Tingkai Li, ZiHao Zhou, Adam Thelen, David Howey, Chao Hu

Using a newly generated dataset from 225 nickel-manganese-cobalt/graphite Li-ion cells aged under a wide range of conditions, we demonstrate a lifetime prediction of in-distribution cells with 15. 1% mean absolute percentage error using no more than the first 15% of data, for most cells.

Feature Engineering

When SAM Meets Sonar Images

1 code implementation25 Jun 2023 Lin Wang, Xiufen Ye, Liqiang Zhu, Weijie Wu, JianGuo Zhang, Huiming Xing, Chao Hu

Notably, there is a lack of research on the application of SAM to sonar imaging.

Segmentation Semantic Segmentation

Uncertainty Quantification in Machine Learning for Engineering Design and Health Prognostics: A Tutorial

1 code implementation7 May 2023 Venkat Nemani, Luca Biggio, Xun Huan, Zhen Hu, Olga Fink, Anh Tran, Yan Wang, Xiaoge Zhang, Chao Hu

In this tutorial, we aim to provide a holistic lens on emerging UQ methods for ML models with a particular focus on neural networks and the applications of these UQ methods in tackling engineering design as well as prognostics and health management problems.

Decision Making Management +2

Federated Learning with Uncertainty-Based Client Clustering for Fleet-Wide Fault Diagnosis

1 code implementation26 Apr 2023 Hao Lu, Adam Thelen, Olga Fink, Chao Hu, Simon Laflamme

To quantify dataset similarity between clients without explicitly sharing data, each client sets aside a local test dataset and evaluates the other clients' model prediction accuracy and uncertainty on this test dataset.

Clustering Federated Learning

HyperAttack: Multi-Gradient-Guided White-box Adversarial Structure Attack of Hypergraph Neural Networks

no code implementations24 Feb 2023 Chao Hu, Ruishi Yu, Binqi Zeng, Yu Zhan, Ying Fu, Quan Zhang, Rongkai Liu, Heyuan Shi

Hypergraph neural networks (HGNN) have shown superior performance in various deep learning tasks, leveraging the high-order representation ability to formulate complex correlations among data by connecting two or more nodes through hyperedge modeling.

Adversarial Attack

A Lightweight Reconstruction Network for Surface Defect Inspection

no code implementations25 Dec 2022 Chao Hu, Jian Yao, Weijie Wu, Weibin Qiu, Liqiang Zhu

Currently, most deep learning methods cannot solve the problem of scarcity of industrial product defect samples and significant differences in characteristics.

Defect Detection Image Reconstruction

Multi-scale Feature Imitation for Unsupervised Anomaly Localization

no code implementations12 Dec 2022 Chao Hu, Shengxin Lai

The unsupervised anomaly localization task faces the challenge of missing anomaly sample training, detecting multiple types of anomalies, and dealing with the proportion of the area of multiple anomalies.

IDMS: Instance Depth for Multi-scale Monocular 3D Object Detection

no code implementations3 Dec 2022 Chao Hu, Liqiang Zhu, Weibing Qiu, Weijie Wu

Firstly, to enhance the model's processing ability for different scale targets, a multi-scale perception module based on dilated convolution is designed, and the depth features containing multi-scale information are re-refined from both spatial and channel directions considering the inconsistency between feature maps of different scales.

Auxiliary Learning Monocular 3D Object Detection +2

Pedestrian Spatio-Temporal Information Fusion For Video Anomaly Detection

no code implementations18 Nov 2022 Chao Hu, Liqiang Zhu

Aiming at the problem that the current video anomaly detection cannot fully use the temporal information and ignore the diversity of normal behavior, an anomaly detection method is proposed to integrate the spatiotemporal information of pedestrians.

Anomaly Detection Video Anomaly Detection

Efficient Unsupervised Video Object Segmentation Network Based on Motion Guidance

no code implementations10 Nov 2022 Chao Hu, Liqiang Zhu

Then, the semantic features of the motion representation are obtained through the local attention mechanism in the motion guidance module to obtain the high-level semantic features of the appearance representation.

object-detection Optical Flow Estimation +4

Spatio-Temporal-based Context Fusion for Video Anomaly Detection

no code implementations18 Oct 2022 Chao Hu, Weibin Qiu, Weijie Wu, Liqiang Zhu

Motion features are used multiple targets in the video frame to construct spatial context simultaneously, re-encoding the target appearance and motion features, and finally reconstructing the above features through the spatio-temporal dual-stream network, and using the reconstruction error to represent the abnormal score.

Anomaly Detection Optical Flow Estimation +1

A Comprehensive Review of Digital Twin -- Part 2: Roles of Uncertainty Quantification and Optimization, a Battery Digital Twin, and Perspectives

no code implementations27 Aug 2022 Adam Thelen, Xiaoge Zhang, Olga Fink, Yan Lu, Sayan Ghosh, Byeng D. Youn, Michael D. Todd, Sankaran Mahadevan, Chao Hu, Zhen Hu

This second paper presents a literature review of key enabling technologies of digital twins, with an emphasis on uncertainty quantification, optimization methods, open source datasets and tools, major findings, challenges, and future directions.

Uncertainty Quantification

A Comprehensive Review of Digital Twin -- Part 1: Modeling and Twinning Enabling Technologies

no code implementations26 Aug 2022 Adam Thelen, Xiaoge Zhang, Olga Fink, Yan Lu, Sayan Ghosh, Byeng D. Youn, Michael D. Todd, Sankaran Mahadevan, Chao Hu, Zhen Hu

In part two of this review, the role of uncertainty quantification and optimization are discussed, a battery digital twin is demonstrated, and more perspectives on the future of digital twin are shared.

Uncertainty Quantification

Learning to Aggregate Multi-Scale Context for Instance Segmentation in Remote Sensing Images

1 code implementation22 Nov 2021 Ye Liu, Huifang Li, Chao Hu, Shuang Luo, Yan Luo, Chang Wen Chen

The proposed model exploits three lightweight plug-and-play modules, namely dense feature pyramid network (DenseFPN), spatial context pyramid (SCP), and hierarchical region of interest extractor (HRoIE), to aggregate global visual context at feature, spatial, and instance domains, respectively.

Instance Segmentation Object Detection

Normal Learning in Videos with Attention Prototype Network

1 code implementation25 Aug 2021 Chao Hu, Fan Wu, Weijie Wu, Weibin Qiu, Shengxin Lai

With models trained on the normal data, the reconstruction errors of anomalous scenes are usually much larger than those of normal ones.

Anomaly Detection Video Anomaly Detection

S&CNet: Monocular Depth Completion for Autonomous Systems and 3D Reconstruction

no code implementations13 Jul 2019 Lei Zhang, Weihai Chen, Chao Hu, Xingming Wu, Zhengguo Li

In this paper, a lightweight yet efficient network (S\&CNet) is proposed to obtain a good trade-off between efficiency and accuracy for the dense depth completion.

3D Reconstruction Autonomous Driving +1

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