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基于线性度校验的电力系统谐波阻抗估计仿真 被引量:3
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作者 马思棋 王忠 《计算机仿真》 北大核心 2022年第11期96-99,188,共5页
电力系统谐波阻抗随电流幅值变化出现电力波动特性干扰,导致估算精度下降。提出基于线性度校验的电力系统谐波阻抗估计方法。分析电流幅值随时间的正弦波动值、线性波动值与随机波动,获取电力波动特性对谐波阻抗估计的电力波动特性干扰... 电力系统谐波阻抗随电流幅值变化出现电力波动特性干扰,导致估算精度下降。提出基于线性度校验的电力系统谐波阻抗估计方法。分析电流幅值随时间的正弦波动值、线性波动值与随机波动,获取电力波动特性对谐波阻抗估计的电力波动特性干扰因素,收集谐波阻抗数据,构建系统谐波阻抗估计的极大似然模型,获取谐波阻抗的元复正态线性度变量独立分布采样,计算线性度变量服从几率密度函数值,组建极大似然估计函数,估算谐波阻抗的极大似然模型,得到电力系统的谐波阻抗估计值。仿真结果证明,估算精度与稳定性得到提高。 展开更多
关键词 线性度 电力系统 谐波阻抗 几率密度函数 电力波动特性
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Bilayered semiconductor graphene nanostructures with periodically arranged hexagonal holes
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作者 Dmitry G. Kvashnin Peter Vancso +4 位作者 Liubov Yu. Antipina Geza I. Mark Laszlo P. Biro Pavel B. Sorokin Leonid A. Chernozatonskii 《Nano Research》 SCIE EI CAS CSCD 2015年第4期1250-1258,共9页
We present a theoretical study of new nanostructures based on bilayered graphene with periodically arranged hexagonal holes (bilayered graphene antidots). Our ab initio calculations show that fabrication of hexagona... We present a theoretical study of new nanostructures based on bilayered graphene with periodically arranged hexagonal holes (bilayered graphene antidots). Our ab initio calculations show that fabrication of hexagonal holes in bigraphene leads to connection of the neighboring edges of the two graphene layers with formation of a hollow carbon nanostructure sheet which displays a wide range of electronic properties (from semiconductor to metallic), depending on the size of the holes and the distance between them. The results were additionally supported by wave packet dynamical transport calculations based on the numerical solution of the time-dependent Schr/Sdinger equation. 展开更多
关键词 gaphene ANTIDOTS electronic properties DFT
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