Search Results for author: Xiao Hu

Found 26 papers, 10 papers with code

A Large-scale Annotated Mechanical Components Benchmark for Classification and Retrieval Tasks with Deep Neural Networks

1 code implementation ECCV 2020 Sangpil Kim, Hyung-gun Chi, Xiao Hu, Qi-Xing Huang, Karthik Ramani

We introduce a large-scale annotated mechanical components benchmark for classification and retrieval tasks named MechanicalComponents Benchmark (MCB): a large-scale dataset of 3D objects of mechanical components.

Retrieval

DecisionNCE: Embodied Multimodal Representations via Implicit Preference Learning

no code implementations28 Feb 2024 Jianxiong Li, Jinliang Zheng, Yinan Zheng, Liyuan Mao, Xiao Hu, Sijie Cheng, Haoyi Niu, Jihao Liu, Yu Liu, Jingjing Liu, Ya-Qin Zhang, Xianyuan Zhan

Multimodal pretraining has emerged as an effective strategy for the trinity of goals of representation learning in autonomous robots: 1) extracting both local and global task progression information; 2) enforcing temporal consistency of visual representation; 3) capturing trajectory-level language grounding.

Contrastive Learning Decision Making +1

Reconsideration on evaluation of machine learning models in continuous monitoring using wearables

no code implementations4 Dec 2023 Cheng Ding, Zhicheng Guo, Cynthia Rudin, Ran Xiao, Fadi B Nahab, Xiao Hu

This paper explores the challenges in evaluating machine learning (ML) models for continuous health monitoring using wearable devices beyond conventional metrics.

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 Self-Supervised Algorithm for Denoising Photoplethysmography Signals for Heart Rate Estimation from Wearables

no code implementations7 Jul 2023 Pranay Jain, Cheng Ding, Cynthia Rudin, Xiao Hu

Smart watches and other wearable devices are equipped with photoplethysmography (PPG) sensors for monitoring heart rate and other aspects of cardiovascular health.

Denoising Heart rate estimation +1

Learned Kernels for Sparse, Interpretable, and Efficient Medical Time Series Processing

1 code implementation6 Jul 2023 Sully F. Chen, Zhicheng Guo, Cheng Ding, Xiao Hu, Cynthia Rudin

Results: Our interpretable method achieves greater than 99% of the performance of the state-of-the-art methods on the PPG artifact detection task, and even outperforms the state-of-the-art on a challenging out-of-distribution test set, while using dramatically fewer parameters (2% of the parameters of Segade, and about half of the parameters of Tiny-PPG).

Artifact Detection Atrial Fibrillation Detection +2

Generative Job Recommendations with Large Language Model

no code implementations5 Jul 2023 Zhi Zheng, Zhaopeng Qiu, Xiao Hu, Likang Wu, HengShu Zhu, Hui Xiong

The rapid development of online recruitment services has encouraged the utilization of recommender systems to streamline the job seeking process.

Collaborative Filtering Language Modelling +3

Query-Policy Misalignment in Preference-Based Reinforcement Learning

no code implementations27 May 2023 Xiao Hu, Jianxiong Li, Xianyuan Zhan, Qing-Shan Jia, Ya-Qin Zhang

To unravel this mystery, we identify a long-neglected issue in the query selection schemes of existing PbRL studies: Query-Policy Misalignment.

reinforcement-learning

PROTO: Iterative Policy Regularized Offline-to-Online Reinforcement Learning

1 code implementation25 May 2023 Jianxiong Li, Xiao Hu, Haoran Xu, Jingjing Liu, Xianyuan Zhan, Ya-Qin Zhang

Offline-to-online reinforcement learning (RL), by combining the benefits of offline pretraining and online finetuning, promises enhanced sample efficiency and policy performance.

Computational Efficiency reinforcement-learning +1

Deep Joint Source-Channel Coding with Iterative Source Error Correction

1 code implementation17 Feb 2023 Changwoo Lee, Xiao Hu, Hun-Seok Kim

In this paper, we propose an iterative source error correction (ISEC) decoding scheme for deep-learning-based joint source-channel coding (Deep JSCC).

Mind the Gap: Offline Policy Optimization for Imperfect Rewards

1 code implementation3 Feb 2023 Jianxiong Li, Xiao Hu, Haoran Xu, Jingjing Liu, Xianyuan Zhan, Qing-Shan Jia, Ya-Qin Zhang

RGM is formulated as a bi-level optimization problem: the upper layer optimizes a reward correction term that performs visitation distribution matching w. r. t.

Reinforcement Learning (RL)

Learning From Alarms: A Robust Learning Approach for Accurate Photoplethysmography-Based Atrial Fibrillation Detection using Eight Million Samples Labeled with Imprecise Arrhythmia Alarms

1 code implementation7 Nov 2022 Cheng Ding, Zhicheng Guo, Cynthia Rudin, Ran Xiao, Amit Shah, Duc H. Do, Randall J Lee, Gari Clifford, Fadi B Nahab, Xiao Hu

To address this challenge, in this study, we propose to leverage AF alarms from bedside patient monitors to label concurrent PPG signals, resulting in the largest PPG-AF dataset so far (8. 5M 30-second records from 24100 patients) and demonstrating a practical approach to build large labeled PPG datasets.

Atrial Fibrillation Detection Computational Efficiency +2

Why Accuracy Is Not Enough: The Need for Consistency in Object Detection

no code implementations28 Jul 2022 Caleb Tung, Abhinav Goel, Fischer Bordwell, Nick Eliopoulos, Xiao Hu, George K. Thiruvathukal, Yung-Hsiang Lu

Using this method, we show that the consistency of modern object detectors ranges from 83. 2% to 97. 1% on different video datasets from the Multiple Object Tracking Challenge.

Image Compression Multiple Object Tracking +3

Efficient Computer Vision on Edge Devices with Pipeline-Parallel Hierarchical Neural Networks

1 code implementation27 Sep 2021 Abhinav Goel, Caleb Tung, Xiao Hu, George K. Thiruvathukal, James C. Davis, Yung-Hsiang Lu

We design a novel method that creates a parallel inference pipeline for computer vision problems that use hierarchical DNNs.

Log-Spectral Matching GAN: PPG-based Atrial Fibrillation Detection can be Enhanced by GAN-based Data Augmentation with Integration of Spectral Loss

no code implementations11 Aug 2021 Cheng Ding, Ran Xiao, Duc Do, David Scott Lee, Shadi Kalantarian, Randall J Lee, Xiao Hu

Photoplethysmography (PPG) is a ubiquitous physiological measurement that detects beat-to-beat pulsatile blood volume changes and hence has a potential for monitoring cardiovascular conditions, particularly in ambulatory settings.

Atrial Fibrillation Detection Data Augmentation +1

Hetero-Center Loss for Cross-Modality Person Re-Identification

no code implementations22 Oct 2019 Yuanxin Zhu, Zhao Yang, Li Wang, Sai Zhao, Xiao Hu, Dapeng Tao

With the joint supervision of Cross-Entropy (CE) loss and HC loss, the network is trained to achieve two vital objectives, inter-class discrepancy and intra-class cross-modality similarity as much as possible.

Cross-Modality Person Re-identification Person Re-Identification

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