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Hybrid methods of fuzzy clustering and particle swarm optimization (PSO) are important techniques for image segmentation. The spatial credibilistic clustering (SCC) shows better performance than traditional fuzzy clustering, because of the “typicality” represented by credibility memberships degree is much more accurate than the “sharing” represented by probability membership degree to characterize...
A two-stage drain current phenomenon in saturation region, named as Id-Vd hump, has been investigated in high-voltage NMOS transistor. A parasitic BJT turn-on enhanced Id-Vd hump model is proposed and characterized by using a two-dimensional device simulation. By optimizing channel/drift-region process conditions, both parasitic BJT and impact-ionization generation can be suppressed. Both measured...
Top-k monitoring is important to many wireless sensor applications. This paper exploits the semantics of top-k query and proposes an energy-efficient monitoring approach called FILA. The basic idea is to install a filter at each sensor node to suppress unnecessary sensor updates. Filter setting and query reevaluation upon updates are two fundamental issues to the correctness and efficiency of the...
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