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- research-articleOctober 2024
RE-Trace: Re-identification of Modified GPS Trajectories
ACM Transactions on Spatial Algorithms and Systems (TSAS), Volume 10, Issue 4Article No.: 31, Pages 1–28https://doi.org/10.1145/3643680GPS trajectories are a critical asset for building spatio-temporal predictive models in urban regions in the context of road safety monitoring, traffic management, and mobility services. Currently, reliable and efficient data misuse detection methods for ...
- research-articleOctober 2024
Parallel-friendly Spatio-Temporal Graph Learning for Photovoltaic Degradation Analysis at Scale
CIKM '24: Proceedings of the 33rd ACM International Conference on Information and Knowledge ManagementPages 4470–4478https://doi.org/10.1145/3627673.3680026Photovoltaic (PV) power stations have become an integral component to the global sustainable energy landscape. Accurately monitoring and estimating the performance of PV systems is critical to their feasibility for power generation and as a financial ...
- short-paperOctober 2024
Empowering Traffic Speed Prediction with Auxiliary Feature-Aided Dependency Learning
CIKM '24: Proceedings of the 33rd ACM International Conference on Information and Knowledge ManagementPages 4031–4035https://doi.org/10.1145/3627673.3679909Traffic speed prediction is a crucial task for optimizing navigation systems and reducing traffic congestion. Although there have been efforts to improve the accuracy of speed prediction by incorporating auxiliary features, such as traffic flow, weather, ...
- research-articleOctober 2024
Urban Traffic Accident Risk Prediction Revisited: Regionality, Proximity, Similarity and Sparsity
CIKM '24: Proceedings of the 33rd ACM International Conference on Information and Knowledge ManagementPages 281–290https://doi.org/10.1145/3627673.3679567Traffic accidents pose a significant risk to human health and property safety. Therefore, to prevent traffic accidents, predicting their risks has garnered growing interest. We argue that a desired prediction solution should demonstrate resilience to the ...
- research-articleOctober 2024
Adaptive Spatio-temporal Graph Learning for Bus Station Profiling
ACM Transactions on Spatial Algorithms and Systems (TSAS), Volume 10, Issue 3Article No.: 25, Pages 1–23https://doi.org/10.1145/3636459Understanding and managing public transportation systems require capturing complex spatio-temporal correlations within datasets. Existing studies often use predefined graphs in graph learning frameworks, neglecting shifted spatial and long-term temporal ...
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- research-articleOctober 2024
Adaptive Joint Spatio-Temporal Graph Learning Network for Traffic Data Forecasting
ACM Transactions on Spatial Algorithms and Systems (TSAS), Volume 10, Issue 3Article No.: 26, Pages 1–20https://doi.org/10.1145/3634913Traffic data forecasting has become an integral part of the intelligent traffic system. Great efforts are spent developing tools and techniques to estimate traffic flow patterns. Many existing approaches lack the ability to model the complex and dynamic ...
- research-articleSeptember 2024
BT-Tree: A Reinforcement Learning Based Index for Big Trajectory Data
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 4Article No.: 194, Pages 1–27https://doi.org/10.1145/3677130With the increasing availability of trajectory data, it is important to have good indexes to facilitate query processing. In this work, we propose BT-Tree, which is built through a recursive bi-partitioning approach, for the processing of range and KNN ...
- research-articleAugust 2024
STEMO: Early Spatio-temporal Forecasting with Multi-Objective Reinforcement Learning
KDD '24: Proceedings of the 30th ACM SIGKDD Conference on Knowledge Discovery and Data MiningPages 2618–2627https://doi.org/10.1145/3637528.3671922Accuracy and timeliness are indeed often conflicting goals in prediction tasks. Premature predictions may yield a higher rate of false alarms, whereas delaying predictions to gather more information can render them too late to be useful. In applications ...
- research-articleAugust 2024
ReCTSi: Resource-efficient Correlated Time Series Imputation via Decoupled Pattern Learning and Completeness-aware Attentions
KDD '24: Proceedings of the 30th ACM SIGKDD Conference on Knowledge Discovery and Data MiningPages 1474–1483https://doi.org/10.1145/3637528.3671816Imputation of Correlated Time Series (CTS) is essential in data preprocessing for many tasks, particularly when sensor data is often incomplete. Deep learning has enabled sophisticated models that improve CTS imputation by capturing temporal and spatial ...
- short-paperJune 2024
Demonstrating Nexus for Correlation Discovery over Collections of Spatio-Temporal Tabular Data
SIGMOD/PODS '24: Companion of the 2024 International Conference on Management of DataPages 524–527https://doi.org/10.1145/3626246.3654747Causal analysis is crucial for understanding cause-and-effect relationships in observed data to inform better decisions. However, conducting precise causal analysis on observational data is usually impractical, so domain experts often begin their ...
- short-paperJune 2024
Poster: Sustainable Data Management Flow for Spatio-Temporal Datasets
- Yoshiteru Nagata,
- Daiki Kohama,
- Yoshiki Watanabe,
- Shin Katayama,
- Kenta Urano,
- Takuro Yonezawa,
- Nobuo Kawaguchi
MOBISYS '24: Proceedings of the 22nd Annual International Conference on Mobile Systems, Applications and ServicesPages 688–689https://doi.org/10.1145/3643832.3661423Spatio-temporal data is utilized in various fields, but its scale is continuously growing, leading to significant labor and costs in storage and processing. Therefore, the value that can be derived from spatio-temporal data is diluted due to management ...
- research-articleMay 2024
Nexus: Correlation Discovery over Collections of Spatio-Temporal Tabular Data
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 3Article No.: 154, Pages 1–28https://doi.org/10.1145/3654957Causal analysis is essential for gaining insights into complex real-world processes and making informed decisions. However, performing accurate causal analysis on observational data is generally infeasible, and therefore, domain experts start exploration ...
- research-articleMay 2024
SSTKG: Simple Spatio-Temporal Knowledge Graph for Intepretable and Versatile Dynamic Information Embedding
WWW '24: Proceedings of the ACM Web Conference 2024Pages 551–559https://doi.org/10.1145/3589334.3645441Knowledge graphs (KGs) have been increasingly employed for link prediction and recommendation using real-world datasets. However, the majority of current methods rely on static data, neglecting the dynamic nature and the hidden spatio-temporal attributes ...
- research-articleMay 2024
UrbanCLIP: Learning Text-enhanced Urban Region Profiling with Contrastive Language-Image Pretraining from the Web
WWW '24: Proceedings of the ACM Web Conference 2024Pages 4006–4017https://doi.org/10.1145/3589334.3645378Urban region profiling from web-sourced data is of utmost importance for urban computing. We are witnessing a blossom of LLMs for various fields, especially in multi-modal data research such as vision-language learning, where text modality serves as a ...
Data Cubes in Hand: A Design Space of Tangible Cubes for Visualizing 3D Spatio-Temporal Data in Mixed Reality
CHI '24: Proceedings of the 2024 CHI Conference on Human Factors in Computing SystemsArticle No.: 209, Pages 1–21https://doi.org/10.1145/3613904.3642740Tangible interfaces in mixed reality (MR) environments allow for intuitive data interactions. Tangible cubes, with their rich interaction affordances, high maneuverability, and stable structure, are particularly well-suited for exploring multi-...
- ArticleMay 2024
MPRG: A Method for Parallel Road Generation Based on Trajectories of Multiple Types of Vehicles
Advances in Knowledge Discovery and Data MiningPages 309–321https://doi.org/10.1007/978-981-97-2262-4_25AbstractAccurate and up-to-date digital road maps are the foundation of many applications, such as navigation and autonomous driving. Recently, the ubiquity of GPS devices in vehicular systems has led to an unprecedented amount of vehicle sensing data for ...
- ArticleMay 2024
SATJiP: Spatial and Augmented Temporal Jigsaw Puzzles for Video Anomaly Detection
Advances in Knowledge Discovery and Data MiningPages 27–40https://doi.org/10.1007/978-981-97-2242-6_3AbstractVideo Anomaly Detection (VAD) is a significant task, which refers to taking a video clip as input and outputting class labels, e.g., normal or abnormal, at the frame level. Wang et al. proposed a method called DSTJiP, which trains the model by ...
- research-articleFebruary 2024
Trajectory-User Linking via Hierarchical Spatio-Temporal Attention Networks
ACM Transactions on Knowledge Discovery from Data (TKDD), Volume 18, Issue 4Article No.: 85, Pages 1–22https://doi.org/10.1145/3635718Trajectory-User Linking (TUL) is crucial for human mobility modeling by linking different trajectories to users with the exploration of complex mobility patterns. Existing works mainly rely on the recurrent neural framework to encode the temporal ...
- short-paperDecember 2023
Traffic Accident Hotspot Prediction Using Temporal Convolutional Networks: A Spatio-Temporal Approach
SIGSPATIAL '23: Proceedings of the 31st ACM International Conference on Advances in Geographic Information SystemsArticle No.: 56, Pages 1–4https://doi.org/10.1145/3589132.3625599Predicting traffic accident hotspots is crucial for ensuring public safety, improving transport planning, and reducing transportation costs. Traditional deep learning models, such as Transformers and LSTMs, have been successful in this field but fail to ...
- short-paperDecember 2023
Unleashing Realistic Air Quality Forecasting: Introducing the Ready-to-Use PurpleAirSF Dataset
SIGSPATIAL '23: Proceedings of the 31st ACM International Conference on Advances in Geographic Information SystemsArticle No.: 30, Pages 1–4https://doi.org/10.1145/3589132.3625575Air quality forecasting has garnered significant attention recently, with data-driven models taking center stage due to advancements in machine learning and deep learning models. However, researchers face challenges with complex data acquisition and the ...