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Time synchronization and energy saving are important for sleeping-based media access control protocols in wireless sensor networks. Existing time synchronization methods were not designed for energy-efficient and sleeping based MAC protocol in WSN in mind. We proposed the energy-efficient clustering time synchronization algorithm by introduce synchronization schedule adopting and border node controlling...
Based on the statistical learning theory support vector machine focuses on the machine learning strategies under small samples and gets better generalization ability than those tools based on the experience risk minimization principle. Its classing or regression performance will be affected by relative super-parameters. An improved multi object optimization algorithm based on simulated annealing is...
Many approaches have been proposed for mining frequent pattern. However, either the search space or memory space is huge, such that the performance for the previous approach degrades when the database is massive or the threshold for mining frequent patterns is low. In this paper, we propose an algorithm for mining frequent patterns. Our algorithm only needs to construct a FP-tree and traverse each...
The processing of a Continuous Reverse k-Nearest-Neighbor (CRkNN) query on moving objects can be divided into two sub tasks: continuous filter, and continuous refinement. The algorithms for the two tasks can be completely independent. Existing CRkNN solutions employ Continuous k-Nearest-Neighbor (CkNN) queries for both continuous filter and continuous refinement. We analyze the CkNN based solution...
In demand of more computing power and less energy use, multiprocessor with power management facility emerges in embedded system design. Dynamic voltage scaling is such a facility that varies clock speed and supply voltage to save more energy. In this paper, we propose ETAHM to allocate tasks on a target multiprocessor system. In pursuit of global optimal solution, it mixes task scheduling, mapping...
This paper studies energy saving of PRMCS (pharos remote monitoring and control system) based on WSN (wireless sensor networks). RTU (remote terminal unit), sensor networks of PRMCS, are installed in outdoor fieldwork, and limited in power, PRMCS saving energy become a key problem. We develop a low power consumption method for PRMCS in which LEACH route algorithm and Sleep-Waken model dispatch are...
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