A regrown composite fiber was synthesized during the sintering of diamond under high pressure 5.8 GPa and high temperature 1500℃for 1 min,using 3wt%MWCNTs as additive.SEM observation of the fiber after alkali and aci...A regrown composite fiber was synthesized during the sintering of diamond under high pressure 5.8 GPa and high temperature 1500℃for 1 min,using 3wt%MWCNTs as additive.SEM observation of the fiber after alkali and acid treatment revealed that the outer layer of the fiber is composed of nano-polycrystalline diamond.EDS,XPS,XRD and Raman spectrum analysis further identified that the fiber is composed of MWCNTs in the inner part and nano-polycrystalline diamond in the out layer.It is proposed that the untransformed MWCNTs may act as a template for the regrown outer layer of nano diamond fiber under high pressure and high temperature.展开更多
Experimental and theoretical researches on the doping effect of interface binding state with homologous and heterogeneous dopants(d) in the system of PCD etc,as well as the action of intermediate layers between D /d a...Experimental and theoretical researches on the doping effect of interface binding state with homologous and heterogeneous dopants(d) in the system of PCD etc,as well as the action of intermediate layers between D /d at superhigh pressure and high temperature(HP-HT) are reported in this paper.展开更多
针对高温超导故障限流器(high temperature superconductor-fault current limiter,HTS-FCL)的全网优化配置问题,提出了一种基于免疫算法的高温超导故障限流器Pareto多目标优化配置新方法。该方法综合考虑了限流器的成本和限流效果这2...针对高温超导故障限流器(high temperature superconductor-fault current limiter,HTS-FCL)的全网优化配置问题,提出了一种基于免疫算法的高温超导故障限流器Pareto多目标优化配置新方法。该方法综合考虑了限流器的成本和限流效果这2个优化目标。首先介绍了HTS-FCL的基本结构和原理,分析了安装高温超导故障限流器对原系统自阻抗的影响,提出了一种基于短路电流变化率的灵敏度计算方法,该方法可以缩小搜索空间,提高算法效率。然后分别建立了限流器成本评价子函数、限流效果评价子函数和多目标评价函数,制定了基于免疫算法的多目标Pareto优化算法流程,并在传统免疫算法的基础上提出了一种改进型的等成本倒位算子,通过仿真验证表明该算子较常规的免疫算法,能更好地收敛到最优解。最后以IEEE 39标准节点系统为例,实现了HTS-FCL的全网优化配置,验证了新方法的有效性,并求得了在综合考虑限流器成本和限流效果下的Pareto最优解集,设计者可以根据自己的意愿和实际情况在所求得的Pareto最优解集中选择合适的最优方案。展开更多
基金Supported by the National Natural Science Foundation of China(No.50342017)by the Natural Science Foundation of Beijing(No.2042019)
文摘A regrown composite fiber was synthesized during the sintering of diamond under high pressure 5.8 GPa and high temperature 1500℃for 1 min,using 3wt%MWCNTs as additive.SEM observation of the fiber after alkali and acid treatment revealed that the outer layer of the fiber is composed of nano-polycrystalline diamond.EDS,XPS,XRD and Raman spectrum analysis further identified that the fiber is composed of MWCNTs in the inner part and nano-polycrystalline diamond in the out layer.It is proposed that the untransformed MWCNTs may act as a template for the regrown outer layer of nano diamond fiber under high pressure and high temperature.
文摘Experimental and theoretical researches on the doping effect of interface binding state with homologous and heterogeneous dopants(d) in the system of PCD etc,as well as the action of intermediate layers between D /d at superhigh pressure and high temperature(HP-HT) are reported in this paper.
文摘针对高温超导故障限流器(high temperature superconductor-fault current limiter,HTS-FCL)的全网优化配置问题,提出了一种基于免疫算法的高温超导故障限流器Pareto多目标优化配置新方法。该方法综合考虑了限流器的成本和限流效果这2个优化目标。首先介绍了HTS-FCL的基本结构和原理,分析了安装高温超导故障限流器对原系统自阻抗的影响,提出了一种基于短路电流变化率的灵敏度计算方法,该方法可以缩小搜索空间,提高算法效率。然后分别建立了限流器成本评价子函数、限流效果评价子函数和多目标评价函数,制定了基于免疫算法的多目标Pareto优化算法流程,并在传统免疫算法的基础上提出了一种改进型的等成本倒位算子,通过仿真验证表明该算子较常规的免疫算法,能更好地收敛到最优解。最后以IEEE 39标准节点系统为例,实现了HTS-FCL的全网优化配置,验证了新方法的有效性,并求得了在综合考虑限流器成本和限流效果下的Pareto最优解集,设计者可以根据自己的意愿和实际情况在所求得的Pareto最优解集中选择合适的最优方案。
