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A real-time database system usually requires maintaining a large amount of temporal data objects which record and model a physical, real-world environment. These temporal data objects are accessed by application transactions to generate the ultimate control actions. In the actual applications, real-time database systems require not only ensuring(More)
Trajectory data are widely used in location-dependent systems (e.g., traffic control systems, meteorology monitoring systems, mobile computing systems, etc.) For these application systems, to find similar trajectories of moving objects is an important and interesting issue. In this paper, a data model of trajectories based discrete grid cells is given, and(More)
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