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In the real world, trajectory data is often sparse and incomplete due to low collection frequencies or limited device coverage. Trajectory recovery aims to recover these missing trajectory points, making the trajectories denser and more…

Artificial Intelligence · Computer Science 2025-03-25 Qingyue Long , Can Rong , Huandong Wang , Shaw Rajib , Yong Li

Spatiotemporal trajectory data is crucial for various applications. However, issues such as device malfunctions and network instability often cause sparse trajectories, leading to lost detailed movement information. Recovering the missing…

Machine Learning · Computer Science 2025-02-12 Tonglong Wei , Yan Lin , Youfang Lin , Shengnan Guo , Jilin Hu , Haitao Yuan , Gao Cong , Huaiyu Wan

Digital sensing provides an unprecedented opportunity to assess and understand mobility. However, incompleteness, missing information, possible inaccuracies, and temporal heterogeneity in the geolocation data can undermine its…

Data Analysis, Statistics and Probability · Physics 2021-01-26 Shivam Pathak , Mingyi He , Sergey Malinchik , Stanislav Sobolevsky

Understanding human mobility is essential for applications in public health, transportation, and urban planning. However, mobility data often suffers from sparsity due to limitations in data collection methods, such as infrequent GPS…

Machine Learning · Computer Science 2025-07-08 Hao Yang , Angela Yao , Christopher Whalen , Gengchen Mai

Data quality is critical to Intelligent Transportation Systems (ITS), as complete and accurate traffic data underpin reliable decision-making in traffic control and management. Recent advances in low-rank tensor recovery algorithms have…

Machine Learning · Computer Science 2025-11-04 Yiyang Yang , Xiejian Chi , Shanxing Gao , Kaidong Wang , Yao Wang

Currently, next location recommendation plays a vital role in location-based social network applications and services. Although many methods have been proposed to solve this problem, three important challenges have not been well addressed…

Social and Information Networks · Computer Science 2021-12-17 Huifeng Li , Bin Wang , Sulei Zhu , Yanyan Xu

High-quality GPS trajectories are essential for location-based web services and smart city applications, including navigation, ride-sharing and delivery. However, due to low sampling rates and limited infrastructure coverage during data…

Machine Learning · Computer Science 2026-03-23 Jinming Wang , Hai Wang , Hongkai Wen , Geyong Min , Man Luo

Trajectory-User Linking (TUL) is crucial for human mobility modeling by linking diferent trajectories to users with the exploration of complex mobility patterns. Existing works mainly rely on the recurrent neural framework to encode the…

Machine Learning · Computer Science 2023-12-08 Wei Chen , Chao Huang , Yanwei Yu , Yongguo Jiang , Junyu Dong

Trajectory prediction is fundamental to various intelligent technologies, such as autonomous driving and robotics. The motion prediction of pedestrians and vehicles helps emergency braking, reduces collisions, and improves traffic safety.…

Computer Vision and Pattern Recognition · Computer Science 2024-05-14 Yao Liu , Binghao Li , Xianzhi Wang , Claude Sammut , Lina Yao

This paper explores potential improvements to the Spatial-Temporal Matching algorithm for aligning the GPS trajectories to road networks. While this algorithm is effective, it presents some limitations in computational efficiency and the…

Machine Learning · Computer Science 2026-03-12 Ali Yousefian , Arianna Burzacchi , Simone Vantini

Autonomous vehicle navigation in shared pedestrian environments requires the ability to predict future crowd motion both accurately and with minimal delay. Understanding the uncertainty of the prediction is also crucial. Most existing…

Computer Vision and Pattern Recognition · Computer Science 2020-11-24 Kunming Li , Stuart Eiffert , Mao Shan , Francisco Gomez-Donoso , Stewart Worrall , Eduardo Nebot

Sparsity is a common issue in many trajectory datasets, including human mobility data. This issue frequently brings more difficulty to relevant learning tasks, such as trajectory imputation and prediction. Nowadays, little existing work…

Machine Learning · Computer Science 2023-01-13 Kyle K. Qin , Yongli Ren , Wei Shao , Brennan Lake , Filippo Privitera , Flora D. Salim

In real-world applications, GPS trajectories often suffer from low sampling rates, with large and irregular intervals between consecutive GPS points. This sparse characteristic presents challenges for their direct use in GPS-based systems.…

Machine Learning · Computer Science 2025-05-21 Tian Sun , Yuqi Chen , Baihua Zheng , Weiwei Sun

In the mobile internet era, managing limited attention amid information overload is crucial for enhancing collaboration and information delivery. However, current attention-aware systems often depend on wearables or personalized data,…

Human-Computer Interaction · Computer Science 2025-09-03 Yutong Lin , Suyuan Liu , Kaiwen Guo , Haohua Du , Chao Liu , Xiang-Yang Li

Understanding human mobility patterns is crucial for urban planning, transportation management, and public health. This study tackles two primary challenges in the field: the reliance on trajectory data, which often fails to capture the…

Machine Learning · Computer Science 2024-10-08 Xishun Liao , Yifan Liu , Chenchen Kuai , Haoxuan Ma , Yueshuai He , Shangqing Cao , Chris Stanford , Jiaqi Ma

Urban commuting data has long been a vital source of understanding population mobility behaviour and has been widely adopted for various applications such as transport infrastructure planning and urban anomaly detection. While…

Other Computer Science · Computer Science 2020-02-17 Lakmal Meegahapola , Noel Athaide , Kasthuri Jayarajah , Shili Xiang , Archan Misra

Recently, Transformer-based image restoration networks have achieved promising improvements over convolutional neural networks due to parameter-independent global interactions. To lower computational cost, existing works generally limit…

Computer Vision and Pattern Recognition · Computer Science 2023-02-06 Jiale Zhang , Yulun Zhang , Jinjin Gu , Yongbing Zhang , Linghe Kong , Xin Yuan

In this paper, we propose a human trajectory prediction model that combines a Long Short-Term Memory (LSTM) network with an attention mechanism. To do that, we use attention scores to determine which parts of the input data the model should…

Computer Vision and Pattern Recognition · Computer Science 2023-09-04 Amin Manafi Soltan Ahmadi , Samaneh Hoseini Semnani

Missing data is an inevitable and common problem in data-driven intelligent transportation systems (ITS). In the past decade, scholars have done many research on the recovery of missing traffic data, however how to make full use of…

Signal Processing · Electrical Eng. & Systems 2022-08-17 Yuting Ding , Di Wu

Analyzing the urban trajectory in cities has become an important topic in data mining. How can we model the human mobility consisting of stay and travel from the raw trajectory data? How can we infer such a mobility model from the single…

Machine Learning · Computer Science 2020-01-22 Lei Shi
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