随着无线通信的发展,用户对移动通信的要求也有所上升,D2D作为5G的关键技术之一,随着用户数量的增加,在蜂窝与D2D同时进行通信时,为了解决在多D2D(Device To Device)用户数时难以有效判断复用组合以及针对目标为D2D用户时的模式分析过...随着无线通信的发展,用户对移动通信的要求也有所上升,D2D作为5G的关键技术之一,随着用户数量的增加,在蜂窝与D2D同时进行通信时,为了解决在多D2D(Device To Device)用户数时难以有效判断复用组合以及针对目标为D2D用户时的模式分析过程过于复杂等问题,在设置了最小Qos情况下,基于D2D用户集群的方式提出一种新型分析模型。首先通过用户权重最优算法确定集群中心用户,对于边缘用户归属采用最优Qos原则,对于群外用户采取水平路损分析。通过仿真分析表明,所提模型在水平面上的用户分布具有较好的覆盖度,大大减少了计算时的复杂度,为接下来的系统整体研究提供了基础。其中平均冗余用户比例低于0.98%,平均遗漏用户比例低于0.65%,平均完成时间比例降低36.8%。展开更多
As a successive work a modified D pair independent of the S pair treated in our previous papers is introduced to avoid the seniority mixing problem. The structure amplitudes of this D pair and S pair are determined si...As a successive work a modified D pair independent of the S pair treated in our previous papers is introduced to avoid the seniority mixing problem. The structure amplitudes of this D pair and S pair are determined simultaneously and self-consistently by iteration,展开更多
To solve the multi-variable and multi-objective optimization problem in the thermal design process of the dual-input aeronautic static inverter,an optimization method based on the combination of the multi-objective ev...To solve the multi-variable and multi-objective optimization problem in the thermal design process of the dual-input aeronautic static inverter,an optimization method based on the combination of the multi-objective evolutionary algorithm based on decomposition(MOEA/D)and the fuzzy set theory is proposed.The heat transfer path of the power device is analyzed and an equivalent heat circuit is conducted.We take junction temperature of the power device,mass,and cost of the heat sink as optimization goals,and take the heat sink structure parameters as design variables to conduct thermal optimization based on MOEA/D.This paper carries out a comparative study,and the results show that the proposed improved algorithm can meet the different requirements for multi-objective weights,and have good rapidity and robustness.展开更多
文摘随着无线通信的发展,用户对移动通信的要求也有所上升,D2D作为5G的关键技术之一,随着用户数量的增加,在蜂窝与D2D同时进行通信时,为了解决在多D2D(Device To Device)用户数时难以有效判断复用组合以及针对目标为D2D用户时的模式分析过程过于复杂等问题,在设置了最小Qos情况下,基于D2D用户集群的方式提出一种新型分析模型。首先通过用户权重最优算法确定集群中心用户,对于边缘用户归属采用最优Qos原则,对于群外用户采取水平路损分析。通过仿真分析表明,所提模型在水平面上的用户分布具有较好的覆盖度,大大减少了计算时的复杂度,为接下来的系统整体研究提供了基础。其中平均冗余用户比例低于0.98%,平均遗漏用户比例低于0.65%,平均完成时间比例降低36.8%。
基金The project supported by National Natural Science Foundation of China under Grant No. 10375003 .
文摘As a successive work a modified D pair independent of the S pair treated in our previous papers is introduced to avoid the seniority mixing problem. The structure amplitudes of this D pair and S pair are determined simultaneously and self-consistently by iteration,
基金supported by the National Natural Science Foundation of China(Nos.U1933115,U2133203)
文摘To solve the multi-variable and multi-objective optimization problem in the thermal design process of the dual-input aeronautic static inverter,an optimization method based on the combination of the multi-objective evolutionary algorithm based on decomposition(MOEA/D)and the fuzzy set theory is proposed.The heat transfer path of the power device is analyzed and an equivalent heat circuit is conducted.We take junction temperature of the power device,mass,and cost of the heat sink as optimization goals,and take the heat sink structure parameters as design variables to conduct thermal optimization based on MOEA/D.This paper carries out a comparative study,and the results show that the proposed improved algorithm can meet the different requirements for multi-objective weights,and have good rapidity and robustness.
