Search Results for author: Xuan Song

Found 53 papers, 22 papers with code

Continuous Domain Generalization

no code implementations17 May 2025 Zekun Cai, Yiheng Yao, Guangji Bai, Renhe Jiang, Xuan Song, Ryosuke Shibasaki, Liang Zhao

Real-world data distributions often shift continuously across multiple latent factors such as time, geography, and socioeconomic context.

Domain Generalization

Connecting the Dots: A Chain-of-Collaboration Prompting Framework for LLM Agents

no code implementations16 May 2025 Jiaxing Zhao, Hongbin Xie, Yuzhen Lei, Xuan Song, Zhuoran Shi, Lianxin Li, Shuangxue Liu, Haoran Zhang

To address these challenges, we propose Cochain, a collaboration prompting framework that effectively solves business workflow collaboration problem by combining knowledge and prompts at a reduced cost.

Prompt Engineering

Unveiling the Inflexibility of Adaptive Embedding in Traffic Forecasting

1 code implementation18 Nov 2024 Hongjun Wang, Jiyuan Chen, Lingyu Zhang, Renhe Jiang, Xuan Song

To address this limitation, we reconsider the design of adaptive embeddings and propose a Principal Component Analysis (PCA) embedding approach that enables models to adapt to new scenarios without retraining.

Attribute Traffic Prediction

Accelerating Flood Warnings by 10 Hours: The Power of River Network Topology in AI-enhanced Flood Forecasting

no code implementations7 Oct 2024 Hongjun Wang, Jiyuan Chen, Yinqiang Zheng, Xuan Song

Climate change-driven floods demand advanced forecasting models, yet Graph Neural Networks (GNNs) underutilize river network topology due to tree-like structures causing over-squashing from high node resistance distances.

Cloth-Changing Person Re-Identification Density Ratio Estimation +1

Learning to Balance: Diverse Normalization for Cloth-Changing Person Re-Identification

no code implementations4 Oct 2024 Hongjun Wang, Jiyuan Chen, Zhengwei Yin, Xuan Song, Yinqiang Zheng

In this paper, we empirically and experimentally demonstrate that completely eliminating or fully retaining clothing features is detrimental to the task.

Cloth-Changing Person Re-Identification

Robust Traffic Forecasting against Spatial Shift over Years

1 code implementation1 Oct 2024 Hongjun Wang, Jiyuan Chen, Tong Pan, Zheng Dong, Lingyu Zhang, Renhe Jiang, Xuan Song

Through meticulous analysis, we attribute this decline to the models' inability to adapt to previously unobserved spatial relationships.

Attribute Mixture-of-Experts

STGformer: Efficient Spatiotemporal Graph Transformer for Traffic Forecasting

1 code implementation1 Oct 2024 Hongjun Wang, Jiyuan Chen, Tong Pan, Zheng Dong, Lingyu Zhang, Renhe Jiang, Xuan Song

STGformer effectively balances the strengths of GCNs and Transformers, enabling efficient modeling of both global and local traffic patterns while maintaining a manageable computational footprint.

Enhancing Spatio-temporal Quantile Forecasting with Curriculum Learning: Lessons Learned

no code implementations18 Jun 2024 Du Yin, Jinliang Deng, Shuang Ao, Zechen Li, Hao Xue, Arian Prabowo, Renhe Jiang, Xuan Song, Flora Salim

Furthermore, our framework incorporates a stacking fusion module to combine diverse information from three types of curriculum learning, resulting in a strong and thorough learning process.

Benchmarking Neural Decoding Backbones towards Enhanced On-edge iBCI Applications

no code implementations8 Jun 2024 Zhou Zhou, Guohang He, Zheng Zhang, Luziwei Leng, Qinghai Guo, Jianxing Liao, Xuan Song, Ran Cheng

We executed a series of neural decoding experiments involving nonhuman primates engaged in random reaching tasks, evaluating four prospective models, Gated Recurrent Unit (GRU), Transformer, Receptance Weighted Key Value (RWKV), and Selective State Space model (Mamba), across several metrics: single-session decoding, multi-session decoding, new session fine-tuning, inference speed, calibration speed, and scalability.

Benchmarking Mamba

Continuous Temporal Domain Generalization

1 code implementation25 May 2024 Zekun Cai, Guangji Bai, Renhe Jiang, Xuan Song, Liang Zhao

Temporal Domain Generalization (TDG) addresses the challenge of training predictive models under temporally varying data distributions.

Domain Generalization

Multi-Modality Spatio-Temporal Forecasting via Self-Supervised Learning

1 code implementation6 May 2024 Jiewen Deng, Renhe Jiang, JiaQi Zhang, Xuan Song

Multi-modality spatio-temporal (MoST) data extends spatio-temporal (ST) data by incorporating multiple modalities, which is prevalent in monitoring systems, encompassing diverse traffic demands and air quality assessments.

Self-Supervised Learning Spatio-Temporal Forecasting

A Phone-based Distributed Ambient Temperature Measurement System with An Efficient Label-free Automated Training Strategy

no code implementations16 Apr 2024 Dayin Chen, Xiaodan Shi, Haoran Zhang, Xuan Song, Dongxiao Zhang, Yuntian Chen, Jinyue Yan

In this study, we propose a distributed phone-based ambient temperature estimation system which enables collaboration among multiple phones to accurately measure the ambient temperature in different areas of an indoor space.

Federated Learning Meta-Learning

Parsimony or Capability? Decomposition Delivers Both in Long-term Time Series Forecasting

no code implementations22 Jan 2024 Jinliang Deng, Feiyang Ye, Du Yin, Xuan Song, Ivor W. Tsang, Hui Xiong

Long-term time series forecasting (LTSF) represents a critical frontier in time series analysis, characterized by extensive input sequences, as opposed to the shorter spans typical of traditional approaches.

Time Series Time Series Forecasting

Spatial-Temporal-Decoupled Masked Pre-training for Spatiotemporal Forecasting

1 code implementation1 Dec 2023 Haotian Gao, Renhe Jiang, Zheng Dong, Jinliang Deng, Yuxin Ma, Xuan Song

Spatiotemporal forecasting techniques are significant for various domains such as transportation, energy, and weather.

 Ranked #1 on Traffic Prediction on EXPY-TKY (using extra training data)

Time Series Traffic Prediction

Hyper-Relational Knowledge Graph Neural Network for Next POI

no code implementations28 Nov 2023 Jixiao Zhang, Yongkang Li, Ruotong Zou, Jingyuan Zhang, Zipei Fan, Xuan Song

In addition, prior works overlook the rich structural information inherent in KG, which consists of higher-order relations and can further alleviate the impact of data sparsity. To this end, we propose a Hyper-Relational Knowledge Graph Neural Network (HKGNN) model.

Graph Neural Network

MemDA: Forecasting Urban Time Series with Memory-based Drift Adaptation

2 code implementations25 Sep 2023 Zekun Cai, Renhe Jiang, Xinyu Yang, Zhaonan Wang, Diansheng Guo, Hiroki Kobayashi, Xuan Song, Ryosuke Shibasaki

Urban time series data forecasting featuring significant contributions to sustainable development is widely studied as an essential task of the smart city.

Multivariate Time Series Forecasting Time Series +2

Curriculum Reinforcement Learning via Morphology-Environment Co-Evolution

no code implementations21 Sep 2023 Shuang Ao, Tianyi Zhou, Guodong Long, Xuan Song, Jing Jiang

Throughout long history, natural species have learned to survive by evolving their physical structures adaptive to the environment changes.

reinforcement-learning Reinforcement Learning +1

STAEformer: Spatio-Temporal Adaptive Embedding Makes Vanilla Transformer SOTA for Traffic Forecasting

1 code implementation21 Aug 2023 Hangchen Liu, Zheng Dong, Renhe Jiang, Jiewen Deng, Jinliang Deng, Quanjun Chen, Xuan Song

With the rapid development of the Intelligent Transportation System (ITS), accurate traffic forecasting has emerged as a critical challenge.

Time Series Traffic Prediction

Extend Wave Function Collapse to Large-Scale Content Generation

no code implementations14 Aug 2023 Yuhe Nie, Shaoming Zheng, Zhan Zhuang, Xuan Song

However, the current WFC algorithm and related research lack the ability to generate commercialized large-scale or infinite content due to constraint conflict and time complexity costs.

Game Design

Learning Gaussian Mixture Representations for Tensor Time Series Forecasting

1 code implementation1 Jun 2023 Jiewen Deng, Jinliang Deng, Renhe Jiang, Xuan Song

Tensor time series (TTS) data, a generalization of one-dimensional time series on a high-dimensional space, is ubiquitous in real-world scenarios, especially in monitoring systems involving multi-source spatio-temporal data (e. g., transportation demands and air pollutants).

Representation Learning Time Series +1

Adaptive Policy Learning for Offline-to-Online Reinforcement Learning

no code implementations14 Mar 2023 Han Zheng, Xufang Luo, Pengfei Wei, Xuan Song, Dongsheng Li, Jing Jiang

In this paper, we consider an offline-to-online setting where the agent is first learned from the offline dataset and then trained online, and propose a framework called Adaptive Policy Learning for effectively taking advantage of offline and online data.

continuous-control Continuous Control +4

Multitask Weakly Supervised Learning for Origin Destination Travel Time Estimation

no code implementations13 Jan 2023 Hongjun Wang, Zhiwen Zhang, Zipei Fan, Jiyuan Chen, Lingyu Zhang, Ryosuke Shibasaki, Xuan Song

Subsequently, a Multitask Weakly Supervised Learning Framework for Travel Time Estimation (MWSL TTE) has been proposed to infer transition probability between roads segments, and the travel time on road segments and intersection simultaneously.

Travel Time Estimation Weakly-supervised Learning

MegaCRN: Meta-Graph Convolutional Recurrent Network for Spatio-Temporal Modeling

1 code implementation12 Dec 2022 Renhe Jiang, Zhaonan Wang, Jiawei Yong, Puneet Jeph, Quanjun Chen, Yasumasa Kobayashi, Xuan Song, Toyotaro Suzumura, Shintaro Fukushima

Spatio-temporal modeling as a canonical task of multivariate time series forecasting has been a significant research topic in AI community.

Decoder Graph Learning +4

Easy Begun is Half Done: Spatial-Temporal Graph Modeling with ST-Curriculum Dropout

2 code implementations28 Nov 2022 Hongjun Wang, Jiyuan Chen, Tong Pan, Zipei Fan, Boyuan Zhang, Renhe Jiang, Lingyu Zhang, Yi Xie, Zhongyi Wang, Xuan Song

Spatial-temporal (ST) graph modeling, such as traffic speed forecasting and taxi demand prediction, is an important task in deep learning area.

Spatio-Temporal Meta-Graph Learning for Traffic Forecasting

1 code implementation27 Nov 2022 Renhe Jiang, Zhaonan Wang, Jiawei Yong, Puneet Jeph, Quanjun Chen, Yasumasa Kobayashi, Xuan Song, Shintaro Fukushima, Toyotaro Suzumura

Traffic forecasting as a canonical task of multivariate time series forecasting has been a significant research topic in AI community.

Decoder Graph Learning +4

GOF-TTE: Generative Online Federated Learning Framework for Travel Time Estimation

no code implementations2 Jul 2022 Zhiwen Zhang, Hongjun Wang, Jiyuan Chen, Zipei Fan, Xuan Song, Ryosuke Shibasaki

However, building a model for such a data-driven task requires a large amount of users' travel information, which directly relates to their privacy and thus is less likely to be shared.

Federated Learning Travel Time Estimation

Online Trajectory Prediction for Metropolitan Scale Mobility Digital Twin

no code implementations21 Jun 2022 Zipei Fan, Xiaojie Yang, Wei Yuan, Renhe Jiang, Quanjun Chen, Xuan Song, Ryosuke Shibasaki

In the first stage, to encode the daily variation of human mobility at a metropolitan level, we automatically extract citywide mobility trends as crowd contexts and predict long-term and long-distance movements at a coarse level.

Prediction Retrieval +1

Route to Time and Time to Route: Travel Time Estimation from Sparse Trajectories

no code implementations21 Jun 2022 Zhiwen Zhang, Hongjun Wang, Zipei Fan, Jiyuan Chen, Xuan Song, Ryosuke Shibasaki

In this case, this paper aims to resolve the problem of travel time estimation (TTE) and route recovery in sparse scenarios, which often leads to the uncertain label of travel time and route between continuously sampled GPS points.

Travel Time Estimation

ST-ExpertNet: A Deep Expert Framework for Traffic Prediction

no code implementations5 May 2022 Hongjun Wang, Jiyuan Chen, Zipei Fan, Zhiwen Zhang, Zekun Cai, Xuan Song

Recently, forecasting the crowd flows has become an important research topic, and plentiful technologies have achieved good performances.

Mixture-of-Experts Prediction +1

Domain Adversarial Graph Convolutional Network Based on RSSI and Crowdsensing for Indoor Localization

no code implementations6 Apr 2022 Mingxin Zhang, Zipei Fan, Ryosuke Shibasaki, Xuan Song

We also incorporate graph convolutional networks (GCNs) to extract graph-level embeddings, a feature that has been largely overlooked in previous WiFi indoor localization studies.

Indoor Localization

Event-Aware Multimodal Mobility Nowcasting

1 code implementation14 Dec 2021 Zhaonan Wang, Renhe Jiang, Hao Xue, Flora D. Salim, Xuan Song, Ryosuke Shibasaki

As a decisive part in the success of Mobility-as-a-Service (MaaS), spatio-temporal predictive modeling for crowd movements is a challenging task particularly considering scenarios where societal events drive mobility behavior deviated from the normality.

Differentiable Projection for Constrained Deep Learning

no code implementations21 Nov 2021 Dou Huang, Haoran Zhang, Xuan Song, Ryosuke Shibasaki

In this paper, we propose to use a differentiable projection layer in DNN instead of directly solving time-consuming KKT conditions.

Deep Learning Image Segmentation +1

Spatio-Temporal-Categorical Graph Neural Networks for Fine-Grained Multi-Incident Co-Prediction

1 code implementation CIKM '21: Proceedings of the 30th ACM International Conference on Information & Knowledge Management 2021 Zhaonan Wang, Renhe Jiang, Zekun Cai, Zipei Fan, Xin Liu, Kyoung-Sook Kim, Xuan Song, Ryosuke Shibasaki

Forecasting incident occurrences (e. g. crime, EMS, traffic accident) is a crucial task for emergency service providers and transportation agencies in performing response time optimization and dynamic fleet management.

Decision Making Management +1

EAT-C: Environment-Adversarial sub-Task Curriculum for Efficient Reinforcement Learning

no code implementations29 Sep 2021 Shuang Ao, Tianyi Zhou, Jing Jiang, Guodong Long, Xuan Song, Chengqi Zhang

They are complementary in acquiring more informative feedback for RL: the planning policy provides dense reward of finishing easier sub-tasks while the environment policy modifies these sub-tasks to be adequately challenging and diverse so the RL agent can quickly adapt to different tasks/environments.

reinforcement-learning Reinforcement Learning (RL)

Adaptive Q-learning for Interaction-Limited Reinforcement Learning

no code implementations29 Sep 2021 Han Zheng, Xufang Luo, Pengfei Wei, Xuan Song, Dongsheng Li, Jing Jiang

Specifically, we explicitly consider the difference between the online and offline data and apply an adaptive update scheme accordingly, i. e., a pessimistic update strategy for the offline dataset and a greedy or no pessimistic update scheme for the online dataset.

Offline RL Q-Learning +3

Uncertainty Regularized Policy Learning for Offline Reinforcement Learning

no code implementations29 Sep 2021 Han Zheng, Jing Jiang, Pengfei Wei, Guodong Long, Xuan Song, Chengqi Zhang

URPL adds an uncertainty regularization term in the policy learning objective to enforce to learn a more stable policy under the offline setting.

D4RL Offline RL +3

An open GPS trajectory dataset and benchmark for travel mode detection

no code implementations17 Sep 2021 Jinyu Chen, Haoran Zhang, Xuan Song, Ryosuke Shibasaki

In this study, we propose and open GPS trajectory dataset marked with travel mode and benchmark for the travel mode detection.

A Multi-view Multi-task Learning Framework for Multi-variate Time Series Forecasting

1 code implementation2 Sep 2021 Jinliang Deng, Xiusi Chen, Renhe Jiang, Xuan Song, Ivor W. Tsang

Therefore, there are two fundamental views which can be used to analyze MTS data, namely the spatial view and the temporal view.

Attribute Multi-Task Learning +2

DL-Traff: Survey and Benchmark of Deep Learning Models for Urban Traffic Prediction

3 code implementations20 Aug 2021 Renhe Jiang, Du Yin, Zhaonan Wang, Yizhuo Wang, Jiewen Deng, Hangchen Liu, Zekun Cai, Jinliang Deng, Xuan Song, Ryosuke Shibasaki

Nowadays, with the rapid development of IoT (Internet of Things) and CPS (Cyber-Physical Systems) technologies, big spatiotemporal data are being generated from mobile phones, car navigation systems, and traffic sensors.

Deep Learning Time Series +2

VLUC: An Empirical Benchmark for Video-Like Urban Computing on Citywide Crowd and Traffic Prediction

no code implementations16 Nov 2019 Renhe Jiang, Zekun Cai, Zhaonan Wang, Chuang Yang, Zipei Fan, Xuan Song, Kota Tsubouchi, Ryosuke Shibasaki

In this study, we publish a new aggregated human mobility dataset generated from a real-world smartphone application and build a standard benchmark for such kind of video-like urban computing with this new dataset and the existing open datasets.

Management Traffic Prediction

DeepUrbanEvent: A System for Predicting Citywide Crowd Dynamics at Big Events

1 code implementation 25th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining 2019 Renhe Jiang, Xuan Song, Dou Huang, Xiaoya Song, Tianqi Xia, Zekun Cai, Zhaonan Wang, Kyoung-Sook Kim, Ryosuke Shibasaki

Therefore in this study, we aim to extract the “deep” trend only from the current momentary observations and generate an accurate prediction for the trend in the short future, which is considered to be an effective way to deal with the event situations.

Management Prediction +1

Visual Graph Mining

no code implementations13 Aug 2017 Quanshi Zhang, Xuan Song, Ryosuke Shibasaki

In this study, we formulate the concept of "mining maximal-size frequent subgraphs" in the challenging domain of visual data (images and videos).

Graph Mining

Category Modeling from Just a Single Labeling: Use Depth Information to Guide the Learning of 2D Models

no code implementations CVPR 2013 Quanshi Zhang, Xuan Song, Xiaowei Shao, Ryosuke Shibasaki, Huijing Zhao

We design a graphical model that uses object edges to represent object structures, and this paper aims to incrementally learn this category model from one labeled object and a number of casually captured scenes.

Object object-detection +1

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