Che-An Lu

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Wireless control systems have advantages of flexible installation, rapid deployment, low maintenance cost and low power consumption compared to wired control system. The attractive features of wireless system as well as the rapid development of wireless sensor hardware, software and middleware make wireless control a promising field. However, there are also(More)
Plotting lots of geographical data points usually clutters up a map. In this paper, we propose an approach to provide a summary view of geographical data by efficiently clustering. We present a novel data structure, called Geo-tree, which is extended from quad tree, and then develop two algorithms, which use Geo-tree to cluster geographic data and visualize(More)
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