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A wireless sensor network is said to form a belt-barrier for a region if it is able to detect any object moving from outside the region to inside. Recently, Cheng and Tsai found if camera sensors are used to form a belt-barrier, the breadth of the barrier becomes an important quality factor to ensure high quality of monitoring (QoM). Then, they proposed the minimum β-breadth belt-barrier construction...
Methods previously for K-nearest neighbors searching usually inefficient face millions of points. We propose two efficient K-nearest neighbors searching algorithms for unorganized cloud points: parameter adjustable single axes searching algorithm and algorithm based on Morton-code of cloud points. The first algorithm uses direct way to search K-nearest neighbors in 3D space. It sorts points by x,...
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