Search Results for author: Youfang Lin

Found 27 papers, 9 papers with code

Diff-RNTraj: A Structure-aware Diffusion Model for Road Network-constrained Trajectory Generation

no code implementations12 Feb 2024 Tonglong Wei, Youfang Lin, Shengnan Guo, Yan Lin, Yiheng Huang, Chenyang Xiang, Yuqing Bai, Menglu Ya, Huaiyu Wan

In this paper, we propose a new problem to meet the practical application need, \emph{i. e.}, road network-constrained trajectory (RNTraj) generation, which can directly generate trajectories on the road network with road-related information.

GTM: General Trajectory Modeling with Auto-regressive Generation of Feature Domains

no code implementations11 Feb 2024 Yan Lin, Jilin Hu, Shengnan Guo, Bin Yang, Christian S. Jensen, Youfang Lin, Huaiyu Wan

Experiments involving three representative trajectory-related tasks on two real-world trajectory datasets provide insight into the intended properties performance of GTM and offer evidence that GTM is capable of meeting its objectives.

Trajectory Modeling Trajectory Prediction +1

Time-Series Contrastive Learning against False Negatives and Class Imbalance

no code implementations19 Dec 2023 Xiyuan Jin, Jing Wang, Lei Liu, Youfang Lin

As an exemplary self-supervised approach for representation learning, time-series contrastive learning has exhibited remarkable advancements in contemporary research.

Contrastive Learning Representation Learning +1

Building Category Graphs Representation with Spatial and Temporal Attention for Visual Navigation

no code implementations6 Dec 2023 Xiaobo Hu, Youfang Lin, Hehe Fan, Shuo Wang, Zhihao Wu, Kai Lv

To this end, an agent needs to 1) learn a piece of certain knowledge about the relations of object categories in the world during training and 2) look for the target object based on the pre-learned object category relations and its moving trajectory in the current unseen environment.

Object Visual Navigation

A Reliable Representation with Bidirectional Transition Model for Visual Reinforcement Learning Generalization

no code implementations4 Dec 2023 Xiaobo Hu, Youfang Lin, Yue Liu, Jinwen Wang, Shuo Wang, Hehe Fan, Kai Lv

Visual reinforcement learning has proven effective in solving control tasks with high-dimensional observations.

Local-Global History-aware Contrastive Learning for Temporal Knowledge Graph Reasoning

no code implementations4 Dec 2023 Wei Chen, Huaiyu Wan, Yuting Wu, Shuyuan Zhao, Jiayaqi Cheng, Yuxin Li, Youfang Lin

Temporal knowledge graphs (TKGs) have been identified as a promising approach to represent the dynamics of facts along the timeline.

Contrastive Learning Knowledge Graphs

Towards Enhancing Relational Rules for Knowledge Graph Link Prediction

1 code implementation20 Oct 2023 Shuhan Wu, Huaiyu Wan, Wei Chen, Yuting Wu, Junfeng Shen, Youfang Lin

To address these issues, we propose a novel knowledge graph reasoning approach, the Relational rUle eNhanced Graph Neural Network (RUN-GNN).

Inductive Link Prediction Relation

A Survey on Service Route and Time Prediction in Instant Delivery: Taxonomy, Progress, and Prospects

no code implementations3 Sep 2023 Haomin Wen, Youfang Lin, Lixia Wu, Xiaowei Mao, Tianyue Cai, Yunfeng Hou, Shengnan Guo, Yuxuan Liang, Guangyin Jin, Yiji Zhao, Roger Zimmermann, Jieping Ye, Huaiyu Wan

An emerging research area within these services is service Route\&Time Prediction (RTP), which aims to estimate the future service route as well as the arrival time of a given worker.

DRL4Route: A Deep Reinforcement Learning Framework for Pick-up and Delivery Route Prediction

1 code implementation30 Jul 2023 Xiaowei Mao, Haomin Wen, Hengrui Zhang, Huaiyu Wan, Lixia Wu, Jianbin Zheng, Haoyuan Hu, Youfang Lin

Deep neural networks based on supervised learning have emerged as the dominant model for the task because of their powerful ability to capture workers' behavior patterns from massive historical data.

reinforcement-learning Reinforcement Learning (RL)

Origin-Destination Travel Time Oracle for Map-based Services

no code implementations6 Jul 2023 Yan Lin, Huaiyu Wan, Jilin Hu, Shengnan Guo, Bin Yang, Youfang Lin, Christian S. Jensen

Given an origin (O), a destination (D), and a departure time (T), an Origin-Destination (OD) travel time oracle~(ODT-Oracle) returns an estimate of the time it takes to travel from O to D when departing at T. ODT-Oracles serve important purposes in map-based services.

Travel Time Estimation

LaDe: The First Comprehensive Last-mile Delivery Dataset from Industry

no code implementations19 Jun 2023 Lixia Wu, Haomin Wen, Haoyuan Hu, Xiaowei Mao, Yutong Xia, Ergang Shan, Jianbin Zhen, Junhong Lou, Yuxuan Liang, Liuqing Yang, Roger Zimmermann, Youfang Lin, Huaiyu Wan

In this paper, we introduce \texttt{LaDe}, the first publicly available last-mile delivery dataset with millions of packages from the industry.

Management

Look Beneath the Surface: Exploiting Fundamental Symmetry for Sample-Efficient Offline RL

1 code implementation NeurIPS 2023 Peng Cheng, Xianyuan Zhan, Zhihao Wu, Wenjia Zhang, Shoucheng Song, Han Wang, Youfang Lin, Li Jiang

Based on extensive experiments, we find TSRL achieves great performance on small benchmark datasets with as few as 1% of the original samples, which significantly outperforms the recent offline RL algorithms in terms of data efficiency and generalizability. Code is available at: https://github. com/pcheng2/TSRL

Data Augmentation Offline RL +1

View Adaptive Light Field Deblurring Networks with Depth Perception

no code implementations13 Mar 2023 Zeqi Shen, Shuo Zhang, Zhuhao Zhang, Qihua Chen, Xueyao Dong, Youfang Lin

On the other hand, because the blur degree also varies with the depth of the object, a depth perception view attention is designed to deblur different depth areas by selectively integrating information from different views.

Deblurring Image Deblurring

DiffSTG: Probabilistic Spatio-Temporal Graph Forecasting with Denoising Diffusion Models

1 code implementation31 Jan 2023 Haomin Wen, Youfang Lin, Yutong Xia, Huaiyu Wan, Qingsong Wen, Roger Zimmermann, Yuxuan Liang

Spatio-temporal graph neural networks (STGNN) have emerged as the dominant model for spatio-temporal graph (STG) forecasting.

Decision Making Denoising

Pre-training General Trajectory Embeddings with Maximum Multi-view Entropy Coding

no code implementations29 Jul 2022 Yan Lin, Huaiyu Wan, Shengnan Guo, Jilin Hu, Christian S. Jensen, Youfang Lin

Spatio-temporal trajectories provide valuable information about movement and travel behavior, enabling various downstream tasks that in turn power real-world applications.

Contrastive Learning Data Augmentation

Light Field Raindrop Removal via 4D Re-sampling

no code implementations26 May 2022 Dong Jing, Shuo Zhang, Song Chang, Youfang Lin

In this paper, we propose a novel LFRR network by directly utilizing the complementary pixel information of raindrop-free areas in the input raindrop LF, which consists of the re-sampling module and the refinement module.

Rain Removal

Conservative Distributional Reinforcement Learning with Safety Constraints

no code implementations18 Jan 2022 Hengrui Zhang, Youfang Lin, Sheng Han, Shuo Wang, Kai Lv

Then, CDMPO uses a conservative value function loss to reduce the number of violations of constraints during the exploration process.

Distributional Reinforcement Learning reinforcement-learning +1

Agent-Centric Relation Graph for Object Visual Navigation

no code implementations29 Nov 2021 Xiaobo Hu, Youfang Lin, Shuo Wang, Zhihao Wu, Kai Lv

ACRG is a highly effective structure that consists of two relationships, i. e., the horizontal relationship among objects and the distance relationship between the agent and objects .

Object Relation +1

Multi-View Spatial-Temporal Graph Convolutional Networks with Domain Generalization for Sleep Stage Classification

1 code implementation4 Sep 2021 Ziyu Jia, Youfang Lin, Jing Wang, Xiaojun Ning, Yuanlai He, Ronghao Zhou, Yuhan Zhou, Li-wei H. Lehman

To address the above challenges, we propose a multi-view spatial-temporal graph convolutional networks (MSTGCN) with domain generalization for sleep stage classification.

Classification Domain Generalization

HetEmotionNet: Two-Stream Heterogeneous Graph Recurrent Neural Network for Multi-modal Emotion Recognition

2 code implementations7 Aug 2021 Ziyu Jia, Youfang Lin, Jing Wang, Zhiyang Feng, Xiangheng Xie, Caijie Chen

The research on human emotion under multimedia stimulation based on physiological signals is an emerging field, and important progress has been achieved for emotion recognition based on multi-modal signals.

Emotion Recognition

SalientSleepNet: Multimodal Salient Wave Detection Network for Sleep Staging

1 code implementation24 May 2021 Ziyu Jia, Youfang Lin, Jing Wang, Xuehui Wang, Peiyi Xie, Yingbin Zhang

Besides, the multimodal attention module is proposed to adaptively capture valuable information from multimodal data for the specific sleep stage.

object-detection Object Detection +2

Multi-Dimension Fusion Network for Light Field Spatial Super-Resolution using Dynamic Filters

1 code implementation26 Aug 2020 Qingyan Sun, Shuo Zhang, Song Chang, Lixi Zhu, Youfang Lin

Light field cameras have been proved to be powerful tools for 3D reconstruction and virtual reality applications.

3D Reconstruction Super-Resolution

Spatial-Temporal Synchronous Graph Convolutional Networks: A New Framework for Spatial-Temporal Network Data Forecasting

2 code implementations3 Apr 2020 Chao Song, Youfang Lin, Shengnan Guo, Huaiyu Wan

Spatial-temporal network data forecasting is of great importance in a huge amount of applications for traffic management and urban planning.

Management Traffic Prediction

Improving Relation Classification by Entity Pair Graph

no code implementations Asian Conference on Machine Learning 2019 Yi Zhao, Huaiyu Wan, Jianwei Gao, Youfang Lin

Existing relation classification approaches mainly rely on exploiting external resources and background knowledge to improve the performance and ignore the correlations between entity pairs which are helpful for relation classification.

Classification General Classification +3

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