Publications
Publications where I am the first, co-first, or lead student author. For each work, I contribute significantly to some or all of the following: problem formulation, algorithm design, paper drafting and revision, code implementation, and experimental evaluation.
Advanced Materials | 2026
Inverse Design of Amorphous Materials with Targeted Properties
Jonas A. Finkler*, Yan Lin*, Tao Du, Jilin Hu, Morten M. Smedskjaer
Generates atomic structures of disordered materials such as glasses that match desired target properties, and refines them into stable low-energy configurations. Also introduces new datasets of amorphous materials to support this kind of design.
IJCAI | 2026
DiSGMM: A Method for Time-varying Microscopic Weight Completion on Road Networks
Yan Lin, Hu Jilin, Shengnan Guo, Christian S. Jensen, Youfang Lin, Huaiyu Wan
Fills in missing fine-grained, time-varying traffic conditions on road networks, such as travel speeds on individual road segments during specific time periods, when observations are sparse both across segments and within each segment. Estimates the full range of likely conditions for each segment and time rather than a single value.
IJCAI | 2026
TrajAR: Long-Term Trajectory Prediction at Urban Intersections via Multi-scale Interaction Perception
Letian Gong*, Yan Lin*, Xinyue Zhang, YiWei Shuang, Guanyu Yao, Cheng Long, Shengnan Guo, Youfang Lin, Huaiyu Wan
KDD | 2026
RIPCN: A Road Impedance Principal Component Network for Probabilistic Traffic Flow Forecasting
Haochen Lv*, Yan Lin*, Shengnan Guo, Xiaowei Mao, Hong Nie, Letian Gong, Youfang Lin, Huaiyu Wan
Forecasts future traffic flow across a road network while also estimating how uncertain each prediction is, combining transportation theory with learned models to capture how congestion shifts traffic between connected roads over time.
NeurIPS | 2025
TrajMamba: An Efficient and Semantic-rich Vehicle Trajectory Pre-training Model
Yichen Liu*, Yan Lin*, Shengnan Guo, Zeyu Zhou, Youfang Lin, Huaiyu Wan
Learns rich and compact representations of vehicle GPS trajectories that capture both how vehicles move and why they travel. Removes redundant trajectory points and adds travel purpose information from roads and nearby places, improving accuracy and efficiency across downstream tasks.
NeurIPS | 2025
TransferTraj: A Vehicle Trajectory Learning Model for Region and Task Transferability
Tonglong Wei*, Yan Lin*, Zeyu Zhou, Haomin Wen, Jilin Hu, Shengnan Guo, Youfang Lin, Gao Cong, Huaiyu Wan
Learns from vehicle GPS trajectories in a way that transfers across different geographic regions and different prediction tasks without retraining, removing the need to keep separate specialized models. Handles each task by treating it as recovering hidden parts of a trajectory, so one model serves many tasks even with limited data.
NeurIPS | 2025
PLMTrajRec: A Scalable and Generalizable Trajectory Recovery Method with Pre-trained Language Models
Tonglong Wei*, Yan Lin*, Youfang Lin, Shengnan Guo, Jilin Hu, Haitao Yuan, Gao Cong, Huaiyu Wan
Recovers the missing points in sparse movement trajectories to restore detailed paths, while needing only a small amount of dense training data and generalizing across trajectories recorded at different sampling rates.
IEEE TKDE | 2025
UVTM: Universal Vehicle Trajectory Modeling with ST Feature Domain Generation
Yan Lin, Jilin Hu, Shengnan Guo, Bin Yang, Christian S. Jensen, Youfang Lin, Huaiyu Wan
A single model for vehicle GPS trajectories that handles many tasks such as travel time estimation, trajectory recovery, and trajectory prediction, instead of maintaining a separate model for each. It stays accurate even when trajectories are sparse or only part of their features are available, by learning to rebuild dense and complete trajectories from incomplete ones.
IJCAI | 2025
TrajCogn: Leveraging LLMs for Cognizing Movement Patterns and Travel Purposes from Trajectories
Zeyu Zhou*, Yan Lin*, Haomin Wen, Shengnan Guo, Jilin Hu, Youfang Lin, Huaiyu Wan
Adapts large language models to understand movement trajectories so they can recognize how people move and infer the purposes behind their travel. A single model handles a range of trajectory analysis tasks across different settings.
IEEE TKDE | 2025
UniTE: A Survey and Unified Pipeline for Pre-training Spatiotemporal Trajectory Embeddings
Yan Lin, Zeyu Zhou, Yicheng Liu, Haochen Lv, Haomin Wen, Tianyi Li, Yushuai Li, Christian S. Jensen, Shengnan Guo, Youfang Lin, Huaiyu Wan
Surveys existing methods for learning reusable representations of movement trajectories and brings them together into a single modular framework with shared code, so that new methods can be built, compared, and evaluated on the same basis.
WWW | 2025
Path-LLM: A Multi-Modal Path Representation Learning by Aligning and Fusing with Large Language Models
Yongfu Wei*, Yan Lin*, Hongfan Gao, Ronghui Xu, Sean Bin Yang, Jilin Hu
Learns representations of paths in a road network by combining the network structure with text that describes physical and regional context, which earlier methods left out. The combined view improves accuracy on tasks such as ranking paths and estimating travel time, including settings with little or no labeled data.
AAAI | 2025
DutyTTE: Deciphering Uncertainty in Origin-Destination Travel Time Estimation
Xiaowei Mao*, Yan Lin*, Shengnan Guo, Yubin Chen, Xingyu Xian, Haomin Wen, Qisen Xu, Youfang Lin, Huaiyu Wan
Estimates the travel time between an origin and a destination and measures how uncertain each prediction is, by first inferring the likely route the trip will follow and then producing reliable confidence intervals that reflect how individual road segments contribute to the overall uncertainty under varying conditions.
NeurIPS | 2024
Mobility-LLM: Learning Visiting Intentions and Travel Preference from Human Mobility Data with Large Language Models
Letian Gong*, Yan Lin*, Xinyue Zhang, Yiwen Lu, Xuedi Han, Yichen Liu, Shengnan Guo, Youfang Lin, Huaiyu Wan
Analyzes human mobility data such as sequences of visited locations to learn why people visit places and what travel preferences they have, and uses large language models to support tasks like predicting future locations.
SIGMOD | 2024
Origin-Destination Travel Time Oracle for Map-based Services
Yan Lin, Huaiyu Wan, Jilin Hu, Shengnan Guo, Bin Yang, Christian S. Jensen, Youfang Lin
Estimates the travel time between an origin and a destination at a given departure time by learning from many past trips that connect the same pair of locations. It first infers a likely route between the two points and then predicts the travel time along it, improving accuracy for map-based navigation services.
IEEE TKDE | 2023
Pre-training General Trajectory Embeddings with Maximum Multi-view Entropy Coding
Yan Lin, Huaiyu Wan, Shengnan Guo, Jilin Hu, Christian S. Jensen, Youfang Lin
Learns general-purpose representations of movement trajectories from unlabeled data that capture both travel behavior and spatial and temporal patterns. The learned representations avoid task-specific bias so they transfer well across many downstream tasks.
IEEE TKDE | 2022
Pre-training Time-Aware Location Embeddings from Spatial-Temporal Trajectories
Huaiyu Wan, Yan Lin, Shengnan Guo, Youfang Lin
Learns vector representations of locations from spatial-temporal trajectories that capture not only where places are but also when people visit them, since the time of visit reflects what a place is used for. These time-aware representations are pre-trained without labels and improve a range of downstream location-based prediction tasks.
AAAI | 2021
Pre-training Context and Time Aware Location Embeddings from Spatial-Temporal Trajectories for User Next Location Prediction
Yan Lin, Huaiyu Wan, Shengnan Guo, Youfang Lin
Pre-trains location representations from movement trajectories that capture how the meaning of a place changes with its surrounding context and the time of visit, leading to more accurate prediction of a user's next location.

Publications where I serve as a contributing author. My involvement in these works typically includes technical discussion, algorithm refinement, or contribution to experiments and writing.
KDD | 2026
Low-Rank Prior-Induced Consistency Flow Matching for Efficient Traffic Imputation
Xiaowei Mao, Tingrui Wu, YangYawen, Shengnan Guo, Yan Lin, Shilong Zhao, Haochen Lv, Youfang Lin, Huaiyu Wan
IJCAI | 2026
G-VTM: A Multimodal Vision-Trajectory Model for Generalized Vehicle Trajectory Prediction
Xinyue Zhang, Letian Gong, Yan Lin, Jinjun Cheng, Junlin Zhang, Guanyu Yao, Shengnan Guo, Youfang Lin, Shaojiang Wang, Huaiyu Wan
DASFAA | 2026
ForceTraj: Modeling Realistic Intention and Heterogeneous Interactions for Multi-modal Trajectory Prediction
Guanyu Yao, Yan Lin, Letian Gong, Xinyue Zhang, Yiwei Shuang, Shengnan Guo, Huaiyu Wan
Predicts the future paths of vehicles for autonomous driving by inferring driver intentions such as lane changes and by modeling how nearby vehicles influence each other. It produces several likely future trajectories rather than a single guess, which improves prediction accuracy on real driving datasets.
KDD | 2026
Traj-MLLM: Can Multimodal Large Language Models Reform Trajectory Data Mining?
Shuo Liu, Di Yao, Yan Lin, Gao Cong, Jingping Bi
Lets multimodal large language models analyze movement trajectories across different regions and tasks without any training, by turning raw trajectories into combined image and text inputs that keep their spatial and temporal structure. A single setup then handles many trajectory analysis tasks.
AAAI | 2026
SculptDrug: A Spatial Condition-Aware Bayesian Flow Model for Structure-based Drug Design
Qingsong Zhong, Haomin Yu, Yan Lin, Wangmeng Shen, Long Zeng, Jilin Hu
Generates drug molecules that fit a target protein's three-dimensional structure, keeping the molecules shaped to sit within the protein's surface and consistent with both its overall form and fine details. This produces more accurate candidate molecules for structure-based drug discovery.
AAAI | 2026
Spatial-Temporal Feedback Diffusion Guidance for Controlled Traffic Imputation
Xiaowei Mao, Huihu Ding, Yan Lin, Tingrui Wu, Shengnan Guo, Dazhuo Qiu, Feiling Fang, Jilin Hu, Huaiyu Wan
Fills in missing values in traffic data by guiding the generation process to stay close to the available observations, adjusting how strongly it follows them for each location and time so that places with few observations are reconstructed more accurately.
KDD | 2025
DUET: Dual Clustering Enhanced Multivariate Time Series Forecasting
Xiangfei Qiu, Xingjian Wu, Yan Lin, Chenjuan Guo, Jilin Hu, Bin Yang
Improves forecasting of multivariate time series by adapting to how patterns change over time and by modeling the relationships between the different variables while reducing the influence of noisy ones.
IEEE TKDE | 2024
Diff-RNTraj: A Structure-aware Diffusion Model for Road Network-constrained Trajectory Generation
Tonglong Wei, Youfang Lin, Shengnan Guo, Yan Lin, Yiheng Huang, Chenyang Xiang, Yuqing Bai, Menglu Ya, Huaiyu Wan
Generates synthetic vehicle trajectories that stay on real road networks and carry road-level information, helping address the shortage of public trajectory data caused by privacy concerns. Each generated point is tied to a road segment and a moving rate, so the trajectories are realistic and ready for downstream trajectory mining tasks.
IEEE TKDE | 2024
STCDM: Spatio-Temporal Contrastive Diffusion Model for Check-In Sequence Generation
Letian Gong, Shengnan Guo, Yan Lin, Yichen Liu, Erwen Zheng, Yiwei Shuang, Youfang Lin, Jilin Hu, Huaiyu Wan
Generates realistic synthetic check-in sequences that capture how people move and visit places over time and space, so that researchers can study and build on this kind of data without relying on scarce real records that are limited by privacy concerns.
IEEE TKDE | 2024
Micro-Macro Spatial-Temporal Graph-based Encoder-Decoder for Map-Constrained Trajectory Recovery
Tonglong Wei, Youfang Lin, Yan Lin, Shengnan Guo, Lan Zhang, Huaiyu Wan
Reconstructs the missing points in sparse GPS trajectories so the recovered paths stay on the road network. It combines the fine details of each individual trip with broader travel patterns shared across many trips to fill in the gaps more accurately.
KBS | 2024
Inductive and Adaptive Graph Convolution Networks Equipped with Constraint Task for Spatial-Temporal Traffic Data Kriging
Tonglong Wei, Youfang Lin, Shengnan Guo, Yan Lin, Yiji Zhao, Xiyuan Jin, Zhihao Wu, Huaiyu Wan
Estimates traffic conditions at locations that have no sensor by learning from the sensors that are available, and handles newly added locations without needing to retrain the model.
IEEE TKDE | 2024
Spatial-Temporal Cross-View Contrastive Pre-Training for Check-in Sequence Representation Learning
Letian Gong, Huaiyu Wan, Shengnan Guo, Li Xiucheng, Yan Lin, Erwen Zheng, Tianyi Wang, Zeyu Zhou, Youfang Lin
Learns general-purpose representations of user check-in sequences from location-based services by jointly capturing where users go and when they go there. The learned representations transfer across different downstream tasks that rely on understanding user mobility.
AAAI | 2023
Contrastive Pre-training with Adversarial Perturbations for Check-In Sequence Representation Learning
Letian Gong, Youfang Lin, Shengnan Guo, Yan Lin, Tianyi Wang, Erwen Zheng, Zeyu Zhou, Huaiyu Wan
Learns general-purpose representations of human check-in sequences that capture spatial and temporal patterns of where people go over time, so the same learned features transfer across many mobility tasks. Removes the need to hand-design how the data is varied during training, giving stronger and more reliable results than task-specific models.
ESWA | 2023
Adversarial Self-Attentive Time-Variant Neural Networks for Multi-Step Time Series Forecasting
Changxia Gao, Ning Zhang, Youru Li, Yan Lin, Huaiyu Wan
Forecasts many future steps of a time series at once and adapts to how the patterns in the series change over time. A training scheme that judges whether predictions look realistic and follow naturally from the recent input helps keep long-range forecasts accurate.
APIN | 2023
Multi-scale Adaptive Attention-based Time-Variant Neural Networks for Multi-step Time Series Forecasting
Changxia Gao, Ning Zhang, Youru Li, Yan Lin, Huaiyu Wan
Forecasts future values of a time series over multiple steps ahead by adapting to how temporal patterns change over time and by capturing patterns that appear at different time scales. Tested on climate and energy consumption data, it gives more accurate forecasts than earlier methods.
NeurIPS | 2023
WITRAN: Water-wave Information Transmission and Recurrent Acceleration Network for Long-range Time Series Forecasting
Yuxin Jia, Youfang Lin, Xinyan Hao, Yan Lin, Shengnan Guo, Huaiyu Wan
Forecasts time series far into the future by jointly capturing patterns at different time scales and the repeating structure across them. It does this while keeping computation efficient, so it stays fast and accurate even over very long horizons.
* Equal Contribution