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A constraint-based sensor network nodes particle swarm search localization algorithm (CPL) is presented. First of all, a constraint domain of an unknown node must be determined; Then the positions which meet specific criteria is searched out by particle swarm optimization algorithm and the searching results within the constraint domain are recorded;(More)
Time synchronization is extremely important for wireless sensor networks. Since the sensors have very limited energy resources and it is very difficult to change batteries for the sensor nodes, energy efficiency is one of primary importance for a sensor network. To prolong the lifetime of a sensor network, we proposed a cluster based on demand time(More)
Cloud computing is Internet-based network, share computing resources through virtualization mode and provide dynamic computing storage or other services according to the user needs. The paper puts forward a new Intelligent health perception system based on cloud computing. The system will achieve scalable IntelliSense terminals and systems, and play an(More)
Localization is one of the most important technologies in Underwater Wireless Sensor Networks (UWSNs), since it plays a critical role in many applications. As the variable speed of sound and the long propagation delays under water, using the traditional localization algorithms become difficult and impractical in UWSNs. In this paper, a new localization(More)
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