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• W2080687330 abstract "Probabilistic range query (PRQ) over uncertain moving objects has attracted much attentions in recent years. Most of existing works focus on the PRQ for objects moving freely in two-dimensional (2D) space. In contrast, this paper studies the PRQ over objects moving in a constrained 2D space where objects are forbidden to be located in some specific areas. We dub it the constrained space probabilistic range query (CSPRQ). We analyze its unique properties and show that to process the CSPRQ using a straightforward solution is infeasible. The key idea of our solution is to use a strategy called <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>pre-approximation</i> that can reduce the initial problem to a highly simplified version, implying that it makes the rest of steps easy to tackle. In particular, this strategy itself is pretty simple and easy to implement. Furthermore, motivated by the cost analysis, we further optimize our solution. The optimizations are mainly based on two insights: (i) the number of <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>effective subdivision</i> s is no more than 1; and (ii) an entity with the larger <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>span</i> is more likely to subdivide a single region. We demonstrate the effectiveness and efficiency of our proposed approaches through extensive experiments under various experimental settings, and highlight an extra finding—the precomputation based method suffers a non-trivial preprocessing time, which offers an important indication sign for the future research." @default.
• W2080687330 created "2016-06-24" @default.
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• W2080687330 date "2015-03-01" @default.
• W2080687330 modified "2023-10-17" @default.
• W2080687330 title "Probabilistic Range Query over Uncertain Moving Objects in Constrained Two-Dimensional Space" @default.
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• W2080687330 doi "https://doi.org/10.1109/tkde.2014.2345402" @default.
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