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Automatic data clustering, whose goal is to recover the proper number of clusters as well as appropriate partitioning of data sets, is a fundamental yet challenging problem in unsupervised learning. In this paper, adaptive multisubpopulation competition (AMC) and multiniche crowding are proposed and incorporated into a memetic algorithm to tackle the problem. The AMC mechanism is developed to ensure...
The linear frequency modulated signal is widely used in radar systems, and two methods, which are DDS and DDWS, are mainly used to generate the baseband signal. This system adopts the DDWS method, based on FPGA parallel theory and high-speed DAC framework, to generate the broadband linear frequency signal with bandwidth of 500MHz. The principle of filter-based pre-distortion compensation presented...
In order to prolong the WSN's lifetime, a refined protocol named LEACH-H (hybrid cluster head selection LEACH) is proposed in this paper. In the first round of Leach-H, the base-station selects a cluster head set through adopting simulated annealing algorithm; in the followed rounds, the cluster heads will select new cluster heads in their own cluster. This will not only solve the problem that the...
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