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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,...
It is an irresistible trend of the electric power improvement for developing the smart grid, which applies a large amount of new technologies in power generation, transmission, distribution and utilization to achieve optimization of the power configuration and energy saving. As one of the key links to make a grid smarter, load forecast plays a significant role in planning and operation in power system...
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...
In this paper, the coexistence issue between macro/micro WCDMA system and macro WiMax system has been investigated. Monte Carlo simulation method is used to evaluate the impact of inter-system interference produced by coexistence of systems in the same geographical area in adjacent frequency. Based on the analysis of the interference, we come to the conclusion whether WCDMA and WiMax systems could...
The operation principle of peak current mode control H bridge converter was analyzed. It can observe nonlinear phenomena in H bridge converter after simulating to the model, which builds by the concept of binary logic variables using Matlab/Simulink. According to the characteristics of H bridge converter, a time-delayed feedback control method was applied to suppress the chaos behavior of H bridge...
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