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Cluster analysis is important in scientific and industrial fields. In this study, we proposed a novel chaotic biogeography-based optimization (CBBO) method, and applied it in centroid-based clustering methods. The results over three types of simulation data showed that this proposed CBBO method gave better performance than chaotic particle swarm optimization, genetic algorithm, firefly algorithm,...
The switchgear, which is directly oriented the needs of the distribution network and the users, is an important kind of facilities whose operation condition is straight relevant to the quality and reliability of power supply. In contrast to the traditional routine maintenance or break maintenance, the condition based maintenance has been developed rapidly recent years as an advanced method, where...
Nonlinear phenomena are very prevalent in power electronic circuits. In this paper, rich nonlinear phenomena were studied in depth in power electronic circuit such as DC-DC converters, AC-DC converters, and DC-AC converters. It regarded voltage mode Buck converter, peak current mode Boost PFC, H bridge inverter as the object of study, elaborated the operation principle, listed in the corresponding...
The load will change drastically when a new user accesses the CDMA system. So the advanced outer loop power control (OLPC) technology will be taken to enrich the target signal interference ratio (SIR) and improve the system performance. The author introduces the ever existed problems about WCDMA outer loop power control for multi-service and analyzes the power control theoretical model. By system...
Builds a state space model of energy consumption and economy growth, and uses Kalman filter algorithm to estimate parameters, and also, uses cointegration test to verify the reliability of the model. The results show that both the long-term and short-term elasticity of energy consumption experience significant fluctuation process from up to down. The same trend of fluctuations may explain that energy...
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