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面向导航星座的混合路由技术研究 被引量:2
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作者 张方 周淦 +2 位作者 喻瑶瑶 聂殿辉 丰大军 《信息技术与网络安全》 2018年第6期94-98,共5页
为了提高卫星导航系统的导航性能,增强自主运行能力,解决我国区域测控网布站的局限性问题,发展星间链路(InterSatellite Links,ISL)成为卫星导航系统发展的必然趋势。简要分析了由GEO/IGSO星层、MEO星层和地面站所构成的立体式导航星座... 为了提高卫星导航系统的导航性能,增强自主运行能力,解决我国区域测控网布站的局限性问题,发展星间链路(InterSatellite Links,ISL)成为卫星导航系统发展的必然趋势。简要分析了由GEO/IGSO星层、MEO星层和地面站所构成的立体式导航星座网络的拓扑结构,并着重对节点之间的路由问题进行深入研究;综合考虑了等待时延、链路速率、节点负载和传输距离等多种影响因素,探索并建立合理的混合评价函数,使算法能够从多条路径中选出最优的路由方案。最后,通过实验仿真验证了所提方法的有效性,这为合理的星间链路路由方案的生成提供了理论依据和应用基础。 展开更多
关键词 卫星导航系统 星间链路 路由规划 混合评价函数
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Elevator Group-Control Policy Based on Neural Network Optimized by Genetic Algorithm 被引量:1
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作者 沈虹 万健如 +2 位作者 张志超 刘英培 李光叶 《Transactions of Tianjin University》 EI CAS 2009年第4期245-248,共4页
Aiming at the diversity and nonlinearity of the elevator system control target, an effective group method based on a hybrid algorithm of genetic algorithm and neural network is presented in this paper. The genetic alg... Aiming at the diversity and nonlinearity of the elevator system control target, an effective group method based on a hybrid algorithm of genetic algorithm and neural network is presented in this paper. The genetic algorithm is used to search the weight of the neural network. At the same time, the multi-objective-based evaluation function is adopted, in which there are three main indicators including the passenger waiting time, car passengers number and the number of stops. Different weights are given to meet the actual needs. The optimal values of the evaluation function are obtained, and the optimal dispatch control of the elevator group control system based on neural network is realized. By analyzing the running of the elevator group control system, all the processes and steps are presented. The validity of the hybrid algorithm is verified by the dynamic imitation performance. 展开更多
关键词 elevator group control genetic algorithm neural network hybrid algorithm
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