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Non-dominated sorting genetic algorithm II (NSGA-II) with multiple constraints handling is employed for multi-objective optimization of the topological structure of telescope skin, in which a bit-matrix is used as the representation of a chromosome, and genetic algorithm (GA) operators are introduced based on the matrix. Objectives including mass, in-plane performance, and out-of-plane load-bearing...
In recent years, the impact of electromagnetic radiation on the lives and environment of urban residents is becoming increasingly apparent. And in the meantime the rapidly growing requirement of people's life quality makes that the electromagnetic environmental problem near high voltage transmission lines is gathering more and more concern. Based on the study of the Finite Element Method, and through...
In this paper, a self-focusing field electron emitter was proposed and simulated with finite element method. In the electron emitter proposed, the gate electrode is placed on center and surrounded by cathode. Therefore, gate electrode is not only to extract the electron from cathode, but also to focus the electron beam. The simulated results show a significant decrease of the dispersion of electron...
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