Search Results for author: Xiao Hu

Found 45 papers, 19 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

R1-Reward: Training Multimodal Reward Model Through Stable Reinforcement Learning

1 code implementation5 May 2025 Yi-Fan Zhang, Xingyu Lu, Xiao Hu, Chaoyou Fu, Bin Wen, Tianke Zhang, Changyi Liu, Kaiyu Jiang, Kaibing Chen, Kaiyu Tang, Haojie Ding, Jiankang Chen, Fan Yang, Zhang Zhang, Tingting Gao, Liang Wang

Our reward model, R1-Reward, trained using the StableReinforce algorithm on this dataset, significantly improves performance on multimodal reward modeling benchmarks.

Reinforcement Learning (RL)

GPT-PPG: A GPT-based Foundation Model for Photoplethysmography Signals

no code implementations11 Mar 2025 Zhaoliang Chen, Cheng Ding, Saurabh Kataria, Runze Yan, Minxiao Wang, Randall Lee, Xiao Hu

This study introduces a novel application of a Generative Pre-trained Transformer (GPT) model tailored for photoplethysmography (PPG) signals, serving as a foundation model for various downstream tasks.

Atrial Fibrillation Detection Denoising +1

State-of-the-Art Stroke Lesion Segmentation at 1/1000th of Parameters

no code implementations7 Mar 2025 Alex Fedorov, Yutong Bu, Xiao Hu, Chris Rorden, Sergey Plis

Efficient and accurate whole-brain lesion segmentation remains a challenge in medical image analysis.

ARC Decoder +3

$\mathtt{GeLLM^3O}$: Generalizing Large Language Models for Multi-property Molecule Optimization

1 code implementation19 Feb 2025 Vishal Dey, Xiao Hu, Xia Ning

Despite recent advancements, most computational methods for molecule optimization are constrained to single- or double-property optimization tasks and suffer from poor scalability and generalizability to novel optimization tasks.

Zero-shot Generalization

Fusion of ECG Foundation Model Embeddings to Improve Early Detection of Acute Coronary Syndromes

no code implementations17 Feb 2025 Zeyuan Meng, Lovely Yeswanth Panchumarthi, Saurabh Kataria, Alex Fedorov, Jessica Zègre-Hemsey, Xiao Hu, Ran Xiao

Acute Coronary Syndrome (ACS) is a life-threatening cardiovascular condition where early and accurate diagnosis is critical for effective treatment and improved patient outcomes.

Contrastive Learning Self-Supervised Learning

MARAGE: Transferable Multi-Model Adversarial Attack for Retrieval-Augmented Generation Data Extraction

no code implementations5 Feb 2025 Xiao Hu, Eric Liu, Weizhou Wang, Xiangyu Guo, David Lie

Retrieval-Augmented Generation (RAG) offers a solution to mitigate hallucinations in Large Language Models (LLMs) by grounding their outputs to knowledge retrieved from external sources.

Adversarial Attack RAG +1

Data Center Cooling System Optimization Using Offline Reinforcement Learning

no code implementations25 Jan 2025 Xianyuan Zhan, Xiangyu Zhu, Peng Cheng, Xiao Hu, Ziteng He, Hanfei Geng, Jichao Leng, Huiwen Zheng, Chenhui Liu, Tianshun Hong, Yan Liang, Yunxin Liu, Feng Zhao

In a typical DC, around 30~40% of the energy is spent on the cooling system rather than on computer servers, posing a pressing need for developing new energy-saving optimization technologies for DC cooling systems.

Graph Neural Network Offline RL +3

log-RRIM: Yield Prediction via Local-to-global Reaction Representation Learning and Interaction Modeling

1 code implementation20 Oct 2024 Xiao Hu, Ziqi Chen, Bo Peng, Daniel Adu-Ampratwum, Xia Ning

Accurate prediction of chemical reaction yields is crucial for optimizing organic synthesis, potentially reducing time and resources spent on experimentation.

Representation Learning

A Visual Cooperative Localization Method for Airborne Magnetic Surveying Based on a Manifold Sensor Fusion Algorithm Using Lie Groups

no code implementations10 Oct 2024 Liang Liu, Xiao Hu, Wei Jiang, Guanglei Meng, Zhujun Wang, Taining Zhang

The solution incorporates a visual processing module and an improved manifold-based sensor fusion algorithm, delivering reliable and accurate positioning information.

Sensor Fusion

Adapting Job Recommendations to User Preference Drift with Behavioral-Semantic Fusion Learning

1 code implementation24 Jun 2024 Xiao Han, Chen Zhu, Xiao Hu, Chuan Qin, Xiangyu Zhao, HengShu Zhu

To address this issue, we propose a novel session-based framework, BISTRO, to timely model user preference through fusion learning of semantic and behavioral information.

Clustering Recommendation Systems

From Basic to Extra Features: Hypergraph Transformer Pretrain-then-Finetuning for Balanced Clinical Predictions on EHR

no code implementations9 Jun 2024 ran Xu, Yiwen Lu, Chang Liu, Yong Chen, Yan Sun, Xiao Hu, Joyce C Ho, Carl Yang

Electronic Health Records (EHRs) contain rich patient information and are crucial for clinical research and practice.

PromptLink: Leveraging Large Language Models for Cross-Source Biomedical Concept Linking

1 code implementation13 May 2024 Yuzhang Xie, Jiaying Lu, Joyce Ho, Fadi Nahab, Xiao Hu, Carl Yang

Furthermore, PromptLink is a generic framework without reliance on additional prior knowledge, context, or training data, making it well-suited for concept linking across various types of data sources.

Language Modelling

Guidance Design for Escape Flight Vehicle Using Evolution Strategy Enhanced Deep Reinforcement Learning

no code implementations4 May 2024 Xiao Hu, Tianshu Wang, Min Gong, Shaoshi Yang

Guidance commands of flight vehicles are a series of data sets with fixed time intervals, thus guidance design constitutes a sequential decision problem and satisfies the basic conditions for using deep reinforcement learning (DRL).

Deep Reinforcement Learning

SiamQuality: A ConvNet-Based Foundation Model for Imperfect Physiological Signals

1 code implementation26 Apr 2024 Cheng Ding, Zhicheng Guo, Zhaoliang Chen, Randall J Lee, Cynthia Rudin, Xiao Hu

However, large foundation models are typically trained on high-quality data, which poses a significant challenge, given the prevalence of poor-quality real-world data.

Photoplethysmography (PPG) Self-Supervised Learning

DecisionNCE: Embodied Multimodal Representations via Implicit Preference Learning

1 code implementation28 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 is an effective strategy for the trinity of goals of representation learning in autonomous robots: 1) extracting both local and global task progressions; 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

Sparse learned kernels for interpretable and efficient medical time series processing

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

Rapid, reliable, and accurate interpretation of medical time-series signals is crucial for high-stakes clinical decision-making.

Artifact Detection Atrial Fibrillation Detection +3

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 Modeling +5

Query-Policy Misalignment in Preference-Based Reinforcement Learning

1 code implementation27 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 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 +2

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).

Decoder

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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