Search Results for author: Xu Liu

Found 114 papers, 40 papers with code

Gait Lateral Network: Learning Discriminative and Compact Representations for Gait Recognition

1 code implementation ECCV 2020 Saihui Hou, Chunshui Cao, Xu Liu, Yongzhen Huang

Gait recognition aims at identifying different people by the walking patterns, which can be conducted at a long distance without the cooperation of subjects.

Gait Recognition

NTIRE 2025 Challenge on Short-form UGC Video Quality Assessment and Enhancement: Methods and Results

1 code implementation17 Apr 2025 Xin Li, Kun Yuan, Bingchen Li, Fengbin Guan, Yizhen Shao, Zihao Yu, Xijun Wang, Yiting Lu, Wei Luo, Suhang Yao, Ming Sun, Chao Zhou, Zhibo Chen, Radu Timofte, Yabin Zhang, Ao-Xiang Zhang, Tianwu Zhi, Jianzhao Liu, Yang Li, Jingwen Xu, Yiting Liao, Yushen Zuo, Mingyang Wu, Renjie Li, Shengyun Zhong, Zhengzhong Tu, Yufan Liu, Xiangguang Chen, Zuowei Cao, Minhao Tang, Shan Liu, Kexin Zhang, Jingfen Xie, Yan Wang, Kai Chen, Shijie Zhao, Yunchen Zhang, Xiangkai Xu, Hong Gao, Ji Shi, Yiming Bao, Xiugang Dong, Xiangsheng Zhou, Yaofeng Tu, Ying Liang, Yiwen Wang, Xinning Chai, Yuxuan Zhang, Zhengxue Cheng, Yingsheng Qin, Yucai Yang, Rong Xie, Li Song, Wei Sun, Kang Fu, Linhan Cao, Dandan Zhu, Kaiwei Zhang, Yucheng Zhu, ZiCheng Zhang, Menghan Hu, Xiongkuo Min, Guangtao Zhai, Zhi Jin, Jiawei Wu, Wei Wang, Wenjian Zhang, Yuhai Lan, Gaoxiong Yi, Hengyuan Na, Wang Luo, Di wu, MingYin Bai, Jiawang Du, Zilong Lu, Zhenyu Jiang, Hui Zeng, Ziguan Cui, Zongliang Gan, Guijin Tang, Xinglin Xie, Kehuan Song, Xiaoqiang Lu, Licheng Jiao, Fang Liu, Xu Liu, Puhua Chen, Ha Thu Nguyen, Katrien De Moor, Seyed Ali Amirshahi, Mohamed-Chaker Larabi, Qi Tang, Linfeng He, Zhiyong Gao, Zixuan Gao, Guohua Zhang, Zhiye Huang, Yi Deng, Qingmiao Jiang, Lu Chen, Yi Yang, Xi Liao, Nourine Mohammed Nadir, YuXuan Jiang, Qiang Zhu, Siyue Teng, Fan Zhang, Shuyuan Zhu, Bing Zeng, David Bull, Meiqin Liu, Chao Yao, Yao Zhao

This paper presents a review for the NTIRE 2025 Challenge on Short-form UGC Video Quality Assessment and Enhancement.

Form Image Super-Resolution +3

Logits DeConfusion with CLIP for Few-Shot Learning

1 code implementation16 Apr 2025 Shuo Li, Fang Liu, Zehua Hao, Xinyi Wang, Lingling Li, Xu Liu, Puhua Chen, Wenping Ma

With its powerful visual-language alignment capability, CLIP performs well in zero-shot and few-shot learning tasks.

Few-Shot Learning

FVOS for MOSE Track of 4th PVUW Challenge: 3rd Place Solution

no code implementations13 Apr 2025 Mengjiao Wang, Junpei Zhang, Xu Liu, Yuting Yang, Mengru Ma

Most existing methods rely on spatiotemporal memory networks to extract frame-level features and have achieved promising results on commonly used datasets.

Segmentation Semantic Segmentation +2

AADNet: Exploring EEG Spatiotemporal Information for Fast and Accurate Orientation and Timbre Detection of Auditory Attention Based on A Cue-Masked Paradigm

no code implementations7 Jan 2025 Keren Shi, Xu Liu, Xue Yuan, Haijie Shang, Ruiting Dai, Hanbin Wang, Yunfa Fu, Ning Jiang, Jiayuan He

To obtain high decoding accuracy with low latency, an end-to-end deep learning model, AADNet, was proposed to exploit the spatiotemporal information from the short time window of EEG signals.

EEG

Efficient Large-Scale Traffic Forecasting with Transformers: A Spatial Data Management Perspective

3 code implementations13 Dec 2024 Yuchen Fang, Yuxuan Liang, Bo Hui, Zezhi Shao, Liwei Deng, Xu Liu, Xinke Jiang, Kai Zheng

From the spatial data management perspective, we present a novel Transformer framework called PatchSTG to efficiently and dynamically model spatial dependencies for large-scale traffic forecasting with interpretability and fidelity.

Management Traffic Prediction

RSUniVLM: A Unified Vision Language Model for Remote Sensing via Granularity-oriented Mixture of Experts

1 code implementation7 Dec 2024 Xu Liu, Zhouhui Lian

To enhance the model's ability to capture visual information at different levels without increasing model size, we design a novel architecture called Granularity-oriented Mixture of Experts to constraint the model to about 1 billion parameters.

Change Detection Image Comprehension +8

HDI-Former: Hybrid Dynamic Interaction ANN-SNN Transformer for Object Detection Using Frames and Events

no code implementations27 Nov 2024 Dianze Li, Jianing Li, Xu Liu, Zhaokun Zhou, Xiaopeng Fan, Yonghong Tian

To address these challenges, we propose HDI-Former, a Hybrid Dynamic Interaction ANN-SNN Transformer, marking the first trial to design a directly trained hybrid ANN-SNN architecture for high-accuracy and energy-efficient object detection using frames and events.

object-detection Object Detection

Knowledge-aware Evolutionary Graph Neural Architecture Search

1 code implementation26 Nov 2024 Chao Wang, Jiaxuan Zhao, Lingling Li, Licheng Jiao, Fang Liu, Xu Liu, Shuyuan Yang

According to the predicted metrics, non-dominated candidate transfer architectures are selected to warm-start the multi-objective evolutionary algorithm for optimizing the #Acc and #Params on a new dataset.

Graph Neural Network Neural Architecture Search

DeepContext: A Context-aware, Cross-platform, and Cross-framework Tool for Performance Profiling and Analysis of Deep Learning Workloads

no code implementations5 Nov 2024 Qidong Zhao, Hao Wu, Yuming Hao, Zilingfeng Ye, Jiajia Li, Xu Liu, Keren Zhou

This paper introduces DeepContext, a novel profiler that links program contexts across high-level Python code, deep learning frameworks, underlying libraries written in C/C++, as well as device code executed on GPUs.

Deep Learning

GIFT-Eval: A Benchmark For General Time Series Forecasting Model Evaluation

1 code implementation14 Oct 2024 Taha Aksu, Gerald Woo, Juncheng Liu, Xu Liu, Chenghao Liu, Silvio Savarese, Caiming Xiong, Doyen Sahoo

Additionally, we provide a comprehensive analysis of 17 baselines, which includes statistical models, deep learning models, and foundation models.

Time Series Time Series Forecasting

A physics-driven sensor placement optimization methodology for temperature field reconstruction

no code implementations27 Sep 2024 Xu Liu, Wen Yao, Wei Peng, Zhuojia Fu, Zixue Xiang, Xiaoqian Chen

Furthermore, the condition number, as the physics-based criterion, is used to optimize sensor locations by the genetic algorithm.

A general reduced-order neural operator for spatio-temporal predictive learning on complex spatial domains

1 code implementation9 Sep 2024 Qinglu Meng, Yingguang Li, Zhiliang Deng, Xu Liu, Gengxiang Chen, Qiutong Wu, Changqing Liu, Xiaozhong Hao

Predictive learning for spatio-temporal processes (PL-STP) on complex spatial domains plays a critical role in various scientific and engineering fields, with its essence being the construction of operators between infinite-dimensional function spaces.

Decoder

Renormalized Connection for Scale-preferred Object Detection in Satellite Imagery

no code implementations9 Sep 2024 Fan Zhang, Lingling Li, Licheng Jiao, Xu Liu, Fang Liu, Shuyuan Yang, Biao Hou

In a series of FPN experiments on the scale-preferred tasks, we found that the ``divide-and-conquer'' idea of FPN severely hampers the detector's learning in the right direction due to the large number of large-scale negative samples and interference from background noise.

object-detection Object Detection

LSVOS Challenge 3rd Place Report: SAM2 and Cutie based VOS

no code implementations20 Aug 2024 Xinyu Liu, Jing Zhang, Kexin Zhang, Xu Liu, Lingling Li

Video Object Segmentation (VOS) presents several challenges, including object occlusion and fragmentation, the dis-appearance and re-appearance of objects, and tracking specific objects within crowded scenes.

Instance Segmentation Object +5

Fast and Efficient: Mask Neural Fields for 3D Scene Segmentation

1 code implementation1 Jul 2024 Zihan Gao, Lingling Li, Licheng Jiao, Fang Liu, Xu Liu, Wenping Ma, Yuwei Guo, Shuyuan Yang

Recent advancements in distilling 2D vision-language foundation models into neural fields, like NeRF and 3DGS, enable open-vocabulary segmentation of 3D scenes from 2D multi-view images without the need for precise 3D annotations.

3DGS NeRF +1

A Reflective LLM-based Agent to Guide Zero-shot Cryptocurrency Trading

no code implementations27 Jun 2024 Yuan Li, Bingqiao Luo, Qian Wang, Nuo Chen, Xu Liu, Bingsheng He

The utilization of Large Language Models (LLMs) in financial trading has primarily been concentrated within the stock market, aiding in economic and financial decisions.

Meta-Backscatter: A New ISAC Paradigm for Battery-Free Internet of Things

no code implementations11 Jun 2024 Xu Liu, Hongliang Zhang, Kaigui Bian, Xi Weng, Lingyang Song

The meta-material sensor has been regarded as a next-generation sensing technology for the battery-free Internet of Things (IoT) due to its battery-free characteristic and improved sensing performance.

Integrated sensing and communication ISAC

Multiplane Prior Guided Few-Shot Aerial Scene Rendering

no code implementations CVPR 2024 Zihan Gao, Licheng Jiao, Lingling Li, Xu Liu, Fang Liu, Puhua Chen, Yuwei Guo

By investigating NeRF's and Multiplane Image (MPI)'s behavior, we propose to guide the training process of NeRF with a Multiplane Prior.

Image Comprehension NeRF +1

Time-FFM: Towards LM-Empowered Federated Foundation Model for Time Series Forecasting

no code implementations23 May 2024 Qingxiang Liu, Xu Liu, Chenghao Liu, Qingsong Wen, Yuxuan Liang

Unlike natural language processing and computer vision, the development of Foundation Models (FMs) for time series forecasting is blocked due to data scarcity.

Time Series Time Series Forecasting

Prompt-Based Spatio-Temporal Graph Transfer Learning

1 code implementation21 May 2024 Junfeng Hu, Xu Liu, Zhencheng Fan, Yifang Yin, Shili Xiang, Savitha Ramasamy, Roger Zimmermann

To bridge the gap, we propose Spatio-Temporal Graph Prompting (STGP), a prompt-based framework capable of adapting to multi-diverse tasks in a data-scarce domain.

Transfer Learning

Beyond Chain-of-Thought: A Survey of Chain-of-X Paradigms for LLMs

no code implementations24 Apr 2024 Yu Xia, Rui Wang, Xu Liu, Mingyan Li, Tong Yu, Xiang Chen, Julian McAuley, Shuai Li

Chain-of-Thought (CoT) has been a widely adopted prompting method, eliciting impressive reasoning abilities of Large Language Models (LLMs).

Survey

Low-rank Adaptation for Spatio-Temporal Forecasting

1 code implementation11 Apr 2024 Weilin Ruan, Wei Chen, Xilin Dang, Jianxiang Zhou, Weichuang Li, Xu Liu, Yuxuan Liang

Spatio-temporal forecasting is crucial in real-world dynamic systems, predicting future changes using historical data from diverse locations.

Prediction Spatio-Temporal Forecasting

Hallucination Diversity-Aware Active Learning for Text Summarization

no code implementations2 Apr 2024 Yu Xia, Xu Liu, Tong Yu, Sungchul Kim, Ryan A. Rossi, Anup Rao, Tung Mai, Shuai Li

Large Language Models (LLMs) have shown propensity to generate hallucinated outputs, i. e., texts that are factually incorrect or unsupported.

Active Learning Diversity +2

CACA Agent: Capability Collaboration based AI Agent

no code implementations22 Mar 2024 Peng Xu, Haoran Wang, Chuang Wang, Xu Liu

As AI Agents based on Large Language Models (LLMs) have shown potential in practical applications across various fields, how to quickly deploy an AI agent and how to conveniently expand the application scenario of AI agents has become a challenge.

AI Agent

Diffeomorphism Neural Operator for various domains and parameters of partial differential equations

1 code implementation19 Feb 2024 Zhiwei Zhao, Changqing Liu, Yingguang Li, Zhibin Chen, Xu Liu

This paper presents a novel neural operator learning framework for solving PDEs with various domains and parameters defined for physical systems, named diffeomorphism neural operator (DNO).

Operator learning

QAGait: Revisit Gait Recognition from a Quality Perspective

1 code implementation24 Jan 2024 Zengbin Wang, Saihui Hou, Man Zhang, Xu Liu, Chunshui Cao, Yongzhen Huang, Peipei Li, Shibiao Xu

Gait recognition is a promising biometric method that aims to identify pedestrians from their unique walking patterns.

Gait Recognition

TNANet: A Temporal-Noise-Aware Neural Network for Suicidal Ideation Prediction with Noisy Physiological Data

no code implementations23 Jan 2024 Niqi Liu, Fang Liu, Wenqi Ji, Xinxin Du, Xu Liu, Guozhen Zhao, Wenting Mu, Yong-Jin Liu

Current methods predominantly focus on image and text data or address artificially introduced noise, neglecting the complexities of natural noise in time-series analysis.

Binary Classification Photoplethysmography (PPG) +2

Geometric Prior Guided Feature Representation Learning for Long-Tailed Classification

2 code implementations21 Jan 2024 Yanbiao Ma, Licheng Jiao, Fang Liu, Shuyuan Yang, Xu Liu, Puhua Chen

In this work, we propose to leverage the geometric information of the feature distribution of the well-represented head class to guide the model to learn the underlying distribution of the tail class.

Representation Learning

LLMs for Relational Reasoning: How Far are We?

no code implementations17 Jan 2024 Zhiming Li, Yushi Cao, Xiufeng Xu, Junzhe Jiang, Xu Liu, Yon Shin Teo, Shang-Wei Lin, Yang Liu

Large language models (LLMs) have revolutionized many areas (e. g. natural language processing, software engineering, etc.)

Common Sense Reasoning Decision Making +4

Towards the Unification of Generative and Discriminative Visual Foundation Model: A Survey

no code implementations15 Dec 2023 Xu Liu, Tong Zhou, Yuanxin Wang, Yuping Wang, Qinjingwen Cao, Weizhi Du, Yonghuan Yang, Junjun He, Yu Qiao, Yiqing Shen

The advent of foundation models, which are pre-trained on vast datasets, has ushered in a new era of computer vision, characterized by their robustness and remarkable zero-shot generalization capabilities.

Image Generation Image Segmentation +2

CLIPC8: Face liveness detection algorithm based on image-text pairs and contrastive learning

1 code implementation29 Nov 2023 Xu Liu, Shu Zhou, Yurong Song, Wenzhe Luo, Xin Zhang

To tackle this issue, we propose a face liveness detection method based on image-text pairs and contrastive learning, dividing liveness attack problems in the financial field into eight categories and using text information to describe the images of these eight types of attacks.

Contrastive Learning Face Recognition

Data-Centric Long-Tailed Image Recognition

no code implementations3 Nov 2023 Yanbiao Ma, Licheng Jiao, Fang Liu, Shuyuan Yang, Xu Liu, Puhua Chen

In the context of the long-tail scenario, models exhibit a strong demand for high-quality data.

Diversity Long-tail Learning

Towards Unifying Diffusion Models for Probabilistic Spatio-Temporal Graph Learning

no code implementations26 Oct 2023 Junfeng Hu, Xu Liu, Zhencheng Fan, Yuxuan Liang, Roger Zimmermann

In this paper, we propose to model these tasks in a unified probabilistic perspective, viewing them as predictions based on conditional information with shared dependencies.

Denoising Graph Learning

Orthogonal Uncertainty Representation of Data Manifold for Robust Long-Tailed Learning

no code implementations16 Oct 2023 Yanbiao Ma, Licheng Jiao, Fang Liu, Shuyuan Yang, Xu Liu, Lingling Li

The disadvantage is that these methods generally pursue models with balanced class accuracy on the data manifold, while ignoring the ability of the model to resist interference.

FastPoseGait: A Toolbox and Benchmark for Efficient Pose-based Gait Recognition

1 code implementation2 Sep 2023 Shibei Meng, Yang Fu, Saihui Hou, Chunshui Cao, Xu Liu, Yongzhen Huang

Our toolbox supports a set of cutting-edge pose-based gait recognition algorithms and a variety of related benchmarks.

Gait Recognition

AutoST: Training-free Neural Architecture Search for Spiking Transformers

1 code implementation1 Jul 2023 Ziqing Wang, Qidong Zhao, Jinku Cui, Xu Liu, Dongkuan Xu

To address these limitations, we introduce AutoST, a training-free NAS method for Spiking Transformers, to rapidly identify high-performance Spiking Transformer architectures.

Neural Architecture Search

TorchBench: Benchmarking PyTorch with High API Surface Coverage

1 code implementation27 Apr 2023 Yueming Hao, Xu Zhao, Bin Bao, David Berard, Will Constable, Adnan Aziz, Xu Liu

TorchBench is able to comprehensively characterize the performance of the PyTorch software stack, guiding the performance optimization across models, PyTorch framework, and GPU libraries.

Benchmarking Vocal Bursts Intensity Prediction

Coupling Artificial Neurons in BERT and Biological Neurons in the Human Brain

no code implementations27 Mar 2023 Xu Liu, Mengyue Zhou, Gaosheng Shi, Yu Du, Lin Zhao, Zihao Wu, David Liu, Tianming Liu, Xintao Hu

Linking computational natural language processing (NLP) models and neural responses to language in the human brain on the one hand facilitates the effort towards disentangling the neural representations underpinning language perception, on the other hand provides neurolinguistics evidence to evaluate and improve NLP models.

Predicting and Enhancing the Fairness of DNNs with the Curvature of Perceptual Manifolds

2 code implementations CVPR 2023 Yanbiao Ma, Licheng Jiao, Fang Liu, Maoji Wen, Lingling Li, Wenping Ma, Shuyuan Yang, Xu Liu, Puhua Chen

To address the challenges of long-tailed classification, researchers have proposed several approaches to reduce model bias, most of which assume that classes with few samples are weak classes.

Classification Fairness +1

Unsupervised Gait Recognition with Selective Fusion

no code implementations19 Mar 2023 Xuqian Ren, Shaopeng Yang, Saihui Hou, Chunshui Cao, Xu Liu, Yongzhen Huang

So to make the pre-trained gait recognition model able to be fine-tuned on unlabeled datasets, we propose a new task: Unsupervised Gait Recognition (UGR).

Contrastive Learning Gait Recognition

Bi-level Multi-objective Evolutionary Learning: A Case Study on Multi-task Graph Neural Topology Search

no code implementations6 Feb 2023 Chao Wang, Licheng Jiao, Jiaxuan Zhao, Lingling Li, Xu Liu, Fang Liu, Shuyuan Yang

It is computationally expensive to determine which LL Pareto weight in the LL Pareto weight set is the most appropriate for each UL solution.

Decision Making Graph Classification +3

Do We Really Need Graph Neural Networks for Traffic Forecasting?

no code implementations30 Jan 2023 Xu Liu, Yuxuan Liang, Chao Huang, Hengchang Hu, Yushi Cao, Bryan Hooi, Roger Zimmermann

Spatio-temporal graph neural networks (STGNN) have become the most popular solution to traffic forecasting.

An In-Depth Exploration of Person Re-Identification and Gait Recognition in Cloth-Changing Conditions

2 code implementations CVPR 2023 Weijia Li, Saihui Hou, Chunjie Zhang, Chunshui Cao, Xu Liu, Yongzhen Huang, Yao Zhao

For the cloth-changing problem, video-based ReID is rarely studied due to the lack of a suitable cloth-changing benchmark, and gait recognition is often researched under controlled conditions.

16k Gait Recognition +1

Delving into Semantic Scale Imbalance

no code implementations30 Dec 2022 Yanbiao Ma, Licheng Jiao, Fang Liu, Yuxin Li, Shuyuan Yang, Xu Liu

Due to the prevalence of semantic scale imbalance, we propose semantic-scale-balanced learning, including a general loss improvement scheme and a dynamic re-weighting training framework that overcomes the challenge of calculating semantic scales in real-time during iterations.

Event-based Monocular Dense Depth Estimation with Recurrent Transformers

no code implementations6 Dec 2022 Xu Liu, Jianing Li, Xiaopeng Fan, Yonghong Tian

Event cameras, offering high temporal resolutions and high dynamic ranges, have brought a new perspective to address common challenges (e. g., motion blur and low light) in monocular depth estimation.

Decoder Event-based vision +1

DWRSeg: Rethinking Efficient Acquisition of Multi-scale Contextual Information for Real-time Semantic Segmentation

no code implementations2 Dec 2022 Haoran Wei, Xu Liu, Shouchun Xu, Zhongjian Dai, Yaping Dai, Xiangyang Xu

In this method, the multi-rate depth-wise dilated convolutions take a simpler role in feature extraction: performing simple semantic-based morphological filtering with one desired receptive field in the second step based on each concise feature map of region form provided by the first step, to improve their efficiency.

Real-Time Semantic Segmentation

Deep Active Learning for Computer Vision: Past and Future

no code implementations27 Nov 2022 Rinyoichi Takezoe, Xu Liu, Shunan Mao, Marco Tianyu Chen, Zhanpeng Feng, Shiliang Zhang, Xiaoyu Wang

As an important data selection schema, active learning emerges as the essential component when iterating an Artificial Intelligence (AI) model.

Active Learning

Task-Agnostic Learning to Accomplish New Tasks

1 code implementation9 Sep 2022 Xianqi Zhang, Xingtao Wang, Xu Liu, Wenrui Wang, Xiaopeng Fan, Debin Zhao

Inspired by this observation, this paper proposes a task-agnostic learning method (TAL for short) that can learn fragmented knowledge from task-agnostic data to accomplish new tasks.

Imitation Learning Offline RL +1

Deep Learning-based Occluded Person Re-identification: A Survey

no code implementations29 Jul 2022 Yunjie Peng, Saihui Hou, Chunshui Cao, Xu Liu, Yongzhen Huang, Zhiqiang He

After that, we summarize and compare the performance of recent occluded person Re-ID methods on four popular datasets: Partial-ReID, Partial-iLIDS, Occluded-ReID, and Occluded-DukeMTMC.

Deep Learning Occluded Person Re-Identification +1

Progressive Feature Learning for Realistic Cloth-Changing Gait Recognition

no code implementations24 Jul 2022 Xuqian Ren, Saihui Hou, Chunshui Cao, Xu Liu, Yongzhen Huang

Gait recognition is instrumental in crime prevention and social security, for it can be conducted at a long distance to figure out the identity of persons.

Gait Recognition

Reliability Analysis of Complex Multi-State System Based on Universal Generating Function and Bayesian Network

no code implementations15 Jun 2022 Xu Liu, Wen Yao, Xiaohu Zheng, Yingchun Xu

To overcome the respective defects of UGF and BN, a novel reliability analysis method called UGF-BN is proposed for the complex MSS.

Computational Efficiency

Bayesian Physics-Informed Extreme Learning Machine for Forward and Inverse PDE Problems with Noisy Data

no code implementations14 May 2022 Xu Liu, Wen Yao, Wei Peng, Weien Zhou

Besides, for inverse PDE problems, problem parameters considered as new output layer weights are unified in a framework with forward PDE problems.

Uncertainty Quantification

Mars Entry Trajectory Planning with Range Discretization and Successive Convexification

no code implementations24 Jan 2022 Xu Liu, Shuang Li, Ming Xin

The virtual control and adaptive trust-region techniques are employed to improve the accuracy, robustness, and computation efficiency of the algorithm.

Numerical Integration Trajectory Planning

Temperature Field Inversion of Heat-Source Systems via Physics-Informed Neural Networks

1 code implementation18 Jan 2022 Xu Liu, Wei Peng, Zhiqiang Gong, Weien Zhou, Wen Yao

In this work, we develop a physics-informed neural network-based temperature field inversion (PINN-TFI) method to solve the TFI-HSS task and a coefficient matrix condition number based position selection of observations (CMCN-PSO) method to select optima positions of noise observations.

Data Augmentation For Medical MR Image Using Generative Adversarial Networks

no code implementations29 Nov 2021 Panjian Huang, Xu Liu, Yongzhen Huang

Our results show that PGGAN-SSIM successfully generates 256x256 realistic brain tumor MR images which fill the real image distribution uncovered by the original dataset.

Data Augmentation Diagnostic +2

Residual fourier neural operator for thermochemical curing of composites

no code implementations15 Nov 2021 Gengxiang Chen, Yingguang Li, Xu Liu, Qinglu Meng, Jing Zhou, Xiaozhong Hao

During the curing process of composites, the temperature history heavily determines the evolutions of the field of degree of cure as well as the residual stress, which will further influence the mechanical properties of composite, thus it is important to simulate the real temperature history to optimize the curing process of composites.

Relative Entropy Gradient Sampler for Unnormalized Distributions

no code implementations6 Oct 2021 Xingdong Feng, Yuan Gao, Jian Huang, Yuling Jiao, Xu Liu

We propose a relative entropy gradient sampler (REGS) for sampling from unnormalized distributions.

When Do Contrastive Learning Signals Help Spatio-Temporal Graph Forecasting?

1 code implementation26 Aug 2021 Xu Liu, Yuxuan Liang, Chao Huang, Yu Zheng, Bryan Hooi, Roger Zimmermann

In view of this, one may ask: can we leverage the additional signals from contrastive learning to alleviate data scarcity, so as to benefit STG forecasting?

Contrastive Learning Data Augmentation +2

A novel meta-learning initialization method for physics-informed neural networks

no code implementations23 Jul 2021 Xu Liu, Xiaoya Zhang, Wei Peng, Weien Zhou, Wen Yao

Inspired by this idea, we propose the new Reptile initialization to sample more tasks from the parameterized PDEs and adapt the penalty term of the loss.

Meta-Learning

Deployment Optimization for Meta-material Based Internet of Things

no code implementations3 Jul 2021 Xu Liu, Jingzhi Hu, Hongliang Zhang, Boya Di, Lingyang Song

It is a challenge to optimize the positions of the Meta-IoT devices to ensure sensing accuracy of 3D environmental conditions.

One Model for All Quantization: A Quantized Network Supporting Hot-Swap Bit-Width Adjustment

no code implementations4 May 2021 Qigong Sun, Xiufang Li, Yan Ren, Zhongjian Huang, Xu Liu, Licheng Jiao, Fang Liu

When the precision of quantization is adjusted, it is necessary to fine-tune the quantized model or minimize the quantization noise, which brings inconvenience in practical applications.

All Diversity +1

Exploring Imitation Learning for Autonomous Driving with Feedback Synthesizer and Differentiable Rasterization

no code implementations2 Mar 2021 Jinyun Zhou, Rui Wang, Xu Liu, Yifei Jiang, Shu Jiang, Jiaming Tao, Jinghao Miao, Shiyu Song

Detailed ablation and visualization analysis are included to further demonstrate each of our proposed modules' effectiveness in our method.

Autonomous Driving Data Augmentation +1 Robotics

Turbulence suppression by streamwise-varying wall rotation in pipe flow

no code implementations6 Jan 2021 Xu Liu, Hongbo Zhu, Rui Wang, Yan Bao, Dai Zhou, Zhaolong Han, Chuanqing Zhou, Yegao Qu, Hui Xu

Two control parameters, which are velocity amplitude and wavelength, are considered.

Fluid Dynamics

Deep-Learned Broadband Encoding Stochastic Filters for Computational Spectroscopic Instruments

no code implementations17 Dec 2020 Hongya Song, Yaoguang Ma, Yubing Han, Weidong Shen, Wenyi Zhang, Yanghui Li, Xu Liu, Yifan Peng, Xiang Hao

Computational spectroscopic instruments with Broadband Encoding Stochastic (BEST) filters allow the reconstruction of the spectrum at high precision with only a few filters.

Instrumentation and Detectors

Group Contextual Encoding for 3D Point Clouds

1 code implementation NeurIPS 2020 Xu Liu, Chengtao Li, Jian Wang, Jingbo Wang, Boxin Shi, Xiaodong He

In this work, we extended the contextual encoding layer that was originally designed for 2D tasks to 3D Point Cloud scenarios.

Scene Understanding

Place Recognition in Forests with Urquhart Tessellations

1 code implementation23 Sep 2020 Guilherme V. Nardari, Avraham Cohen, Steven W. Chen, Xu Liu, Vaibhav Arcot, Roseli A. F. Romero, Vijay Kumar

In this letter, we present a novel descriptor based on Urquhart tessellations derived from the position of trees in a forest.

Loop Closure Detection Position

Variational Inference-Based Dropout in Recurrent Neural Networks for Slot Filling in Spoken Language Understanding

no code implementations23 Aug 2020 Jun Qi, Xu Liu, Javier Tejedor

This paper proposes to generalize the variational recurrent neural network (RNN) with variational inference (VI)-based dropout regularization employed for the long short-term memory (LSTM) cells to more advanced RNN architectures like gated recurrent unit (GRU) and bi-directional LSTM/GRU.

slot-filling Slot Filling +2

The OARF Benchmark Suite: Characterization and Implications for Federated Learning Systems

1 code implementation14 Jun 2020 Sixu Hu, Yuan Li, Xu Liu, Qinbin Li, Zhaomin Wu, Bingsheng He

This paper presents and characterizes an Open Application Repository for Federated Learning (OARF), a benchmark suite for federated machine learning systems.

Federated Learning

SLOAM: Semantic Lidar Odometry and Mapping for Forest Inventory

no code implementations29 Dec 2019 Steven W. Chen, Guilherme V. Nardari, Elijah S. Lee, Chao Qu, Xu Liu, Roseli A. F. Romero, Vijay Kumar

This paper describes an end-to-end pipeline for tree diameter estimation based on semantic segmentation and lidar odometry and mapping.

Segmentation Semantic Segmentation

PolSF: PolSAR image dataset on San Francisco

2 code implementations16 Dec 2019 Xu Liu, Licheng Jiao, Fang Liu

In this paper, we have collected five open polarimetric SAR images, which are images of the San Francisco area.

Image Classification

Directed-Weighting Group Lasso for Eltwise Blocked CNN Pruning

no code implementations21 Oct 2019 Ke Zhan, Shimiao Jiang, Yu Bai, Yi Li, Xu Liu, Zhuoran Xu

Eltwise layer is a commonly used structure in the multi-branch deep learning network.

A Survey on Federated Learning Systems: Vision, Hype and Reality for Data Privacy and Protection

1 code implementation23 Jul 2019 Qinbin Li, Zeyi Wen, Zhaomin Wu, Sixu Hu, Naibo Wang, Yuan Li, Xu Liu, Bingsheng He

By systematically summarizing the existing federated learning systems, we present the design factors, case studies, and future research opportunities.

BIG-bench Machine Learning Federated Learning +1

PolSAR Image Classification based on Polarimetric Scattering Coding and Sparse Support Matrix Machine

no code implementations17 Jun 2019 Xu Liu, Licheng Jiao, Dan Zhang, Fang Liu

In this paper, a novel POLSAR image classification method is proposed based on polarimetric scattering coding and sparse support matrix machine.

Classification General Classification +1

Semi-supervised Complex-valued GAN for Polarimetric SAR Image Classification

no code implementations9 Jun 2019 Qigong Sun, Xiufang Li, Lingling Li, Xu Liu, Fang Liu, Licheng Jiao

However, their interpretation faces some challenges, e. g., deficiency of labeled data, inadequate utilization of data information and so on.

Classification General Classification +2

An End-to-End Network for Panoptic Segmentation

no code implementations CVPR 2019 Huanyu Liu, Chao Peng, Changqian Yu, Jingbo Wang, Xu Liu, Gang Yu, Wei Jiang

Panoptic segmentation, which needs to assign a category label to each pixel and segment each object instance simultaneously, is a challenging topic.

Panoptic Segmentation Segmentation

Evaluating Modern GPU Interconnect: PCIe, NVLink, NV-SLI, NVSwitch and GPUDirect

1 code implementation11 Mar 2019 Ang Li, Shuaiwen Leon Song, Jieyang Chen, Jiajia Li, Xu Liu, Nathan Tallent, Kevin Barker

High performance multi-GPU computing becomes an inevitable trend due to the ever-increasing demand on computation capability in emerging domains such as deep learning, big data and planet-scale simulations.

Hardware Architecture Distributed, Parallel, and Cluster Computing Networking and Internet Architecture Performance

Deep Adaptive Proposal Network for Object Detection in Optical Remote Sensing Images

no code implementations19 Jul 2018 Lin Cheng, Xu Liu, Lingling Li, Licheng Jiao, Xu Tang

More recently, a two-stage detector Faster R-CNN is proposed and demonstrated to be a promising tool for object detection in optical remote sensing images, while the sparse and dense characteristic of objects in remote sensing images is complexity.

Object object-detection +2

Polarimetric Convolutional Network for PolSAR Image Classification

1 code implementation9 Jul 2018 Xu Liu, Licheng Jiao, Xu Tang, Qigong Sun, Dan Zhang

Based on sparse scattering coding and convolution neural network, the polarimetric convolutional network is proposed to classify PolSAR images by making full use of polarimetric information.

Classification General Classification +1

Robust Fruit Counting: Combining Deep Learning, Tracking, and Structure from Motion

no code implementations1 Apr 2018 Xu Liu, Steven W. Chen, Shreyas Aditya, Nivedha Sivakumar, Sandeep Dcunha, Chao Qu, Camillo J. Taylor, Jnaneshwar Das, Vijay Kumar

We present a novel fruit counting pipeline that combines deep segmentation, frame to frame tracking, and 3D localization to accurately count visible fruits across a sequence of images.

Deep Hashing with Category Mask for Fast Video Retrieval

1 code implementation22 Dec 2017 Xu Liu, Lili Zhao, Dajun Ding, Yajiao Dong

This paper proposes an end-to-end deep hashing framework with category mask for fast video retrieval.

Code Generation Deep Hashing +3

DualNet: Learn Complementary Features for Image Recognition

1 code implementation ICCV 2017 Saihui Hou, Xu Liu, Zilei Wang

Here two parallel neural networks are coordinated to learn complementary features and thus a wider network is constructed.

Multiple-Kernel Based Vehicle Tracking Using 3D Deformable Model and Camera Self-Calibration

no code implementations22 Aug 2017 Zheng Tang, Gaoang Wang, Tao Liu, Young-Gun Lee, Adwin Jahn, Xu Liu, Xiaodong He, Jenq-Neng Hwang

In this challenge, we propose a model-based vehicle localization method, which builds a kernel at each patch of the 3D deformable vehicle model and associates them with constraints in 3D space.

Ensemble Learning object-detection +1

Unsupervised Submodular Rank Aggregation on Score-based Permutations

1 code implementation4 Jul 2017 Jun Qi, Xu Liu, Javier Tejedor, Shunsuke Kamijo

Unsupervised rank aggregation on score-based permutations, which is widely used in many applications, has not been deeply explored yet.

Automatic Speech Recognition Automatic Speech Recognition (ASR) +4

Highway Vehicle Counting in Compressed Domain

no code implementations CVPR 2016 Xu Liu, Zilei Wang, Jiashi Feng, Hongsheng Xi

HCR hierarchically divides the traffic scenes into different cases according to vehicle density, such that the broad-variation characteristics of traffic scenes can be better approximated.

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