In order to prolong the network lifetime, energy-efficient protocols adapted to the features of wireless sensor networks should be used. This paper explores in depth the nature of heterogeneous wireless sensor networks, and finally proposes an algorithm to address the problem of finding an effective pathway for heterogeneous clustering energy. The proposed algorithm implements cluster head selection according to the degree of energy attenuation during the network’s running and the degree of candidate nodes’ effective coverage on the whole network, so as to obtain an even energy consumption over the whole network for the situation with high degree of coverage. Simulation results show that the proposed clustering protocol has better adaptability to heterogeneous environments than existing clustering algorithms in prolonging the network lifetime.
Original scientific paperWe describe a new design of parallel algorithm for solving the two-dimensional longest common substring (2D LCS) problem, taking advantage of the multi-core graphic processing unit architecture offered by Compute Unified Device Architecture (CUDA). In this article we also define the 2D LCS problem as finding the largest common 4-connected component from two input matrices and present an algorithm which can exactly solve this problem in 0 (mnst/P) time with a P-core GPU.
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