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GraCT: A Grammar-based Compressed Index for Trajectory Data
(Elsevier Ltd, 2019)
[Abstract]: We introduce a compressed data structure for the storage of free trajectories of moving objects that efficiently supports various spatio-temporal queries. Our structure, dubbed GraCT, stores the absolute positions ...
Aggregated 2D range queries on clustered points
(Elsevier Ltd, 2016-09)
[Abstract] Efficient processing of aggregated range queries on two-dimensional grids is a common requirement in information retrieval and data mining systems, for example in Geographic Information Systems and OLAP cubes. ...
Exploiting Computation-Friendly Graph Compression Methods for Adjacency-Matrix Multiplication
(IEEE Computer Society, 2018-03)
[Abstract] Computing the product of the (binary) adjacency matrix of a large graph with a real-valued vector is an important operation that lies at the heart of various graph analysis tasks, such as computing PageRank. In ...