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Christian S. Jensen
Researcher at Aalborg University
Publications - 541
Citations - 26166
Christian S. Jensen is an academic researcher from Aalborg University. The author has contributed to research in topics: Temporal database & Query language. The author has an hindex of 80, co-authored 507 publications receiving 24234 citations. Previous affiliations of Christian S. Jensen include University of Maryland, College Park & Zhejiang University.
Papers
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Proceedings ArticleDOI
Challenges in the Tracking and Prediction of Scheduled-Vehicle Journeys
TL;DR: The problem of real-time vehicle tracking using wireless communication, and of predicting the future status of the vehicles when their movements are restricted to given routes and when they follow schedules with the best effort are characterized.
Proceedings ArticleDOI
Indexing Metric Uncertain Data for Range Queries
TL;DR: This paper presents efficient metric probabilistic range query algorithms, which utilize the validation and pruning techniques based on the derived probability lower and upper bounds of an object-level and a bi-level model.
Posted Content
Recurrent Multi-Graph Neural Networks for Travel Cost Prediction.
TL;DR: A generic learning framework is proposed to solve the sparse, stochastic OD matrix forecasting problem by dealing with sparse matrices via matrix factorization and two graph convolutional neural networks and capturing temporal dynamics via recurrent neural network.
Proceedings ArticleDOI
Searching Trajectories by Regions of Interest
Shuo Shang,Lisi Chen,Lisi Chen,Lisi Chen,Christian S. Jensen,Ji-Rong Wen,Ji-Rong Wen,Panos Kalnis,Panos Kalnis +8 more
TL;DR: An efficient trajectory search algorithm is developed that exploits upper and lower bounds to prune the search space and that adopts a query-source selection strategy, as well as integrates a heuristic search strategy based on priority ranking to schedule multiple query sources.
Proceedings Article
In-Memory Spatial Join: The Data Matters!
TL;DR: The findings show that the data being real or synthetic, the data distribution, and the join order can influence substantially the performance of the algorithms.