Results 31 to 40 of about 1,580,758 (157)
Gaoya dianqi, 2006 在分析天线电磁场理论的基础上,利用由该理论建立的数值电磁场仿真程序,计算了电力输电线路杆塔浪涌响应,并与传输线理论计算的浪涌响应进行了对比,证明采用数值电磁场方法计算杆塔雷击浪涌响应是可行的,可以用来计算雷击杆塔时架空线路上的感应过电压值。
莫付江, 陈允平, 阮江军
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The development of lightweight, high‐attenuation, and broadband carbon‐based electromagnetic wave absorbers is hindered by the intrinsic trade‐off between impedance matching and dielectric dissipation. Herein, we report a facile and scalable synthesis of N‐doped lignin‐derived interconnected porous carbon (Nx‐LIPC) via hydrogen‐bond self ...
Bin‐Peng Zhang +7 more
wiley +1 more source
, 2001 为了从理论上解迭层太阳电池的工作特性，根据单结太阳电池直流模型提出了迭层电池的直流模型，并在模型上基础上给出了描述迭层电池工作特性的方程组。在迭层电池模型和方程组的基础上，讨论了迭层电池开路状态和短路状态下电池内部电池、电压及功率分配。重点讨论了迭层电池对外做功情况下电流、电压及功率在迭层电池中的分配。论证了迭层电池中，要求获得最大的功率输出 ...
陆大成 +3 more
core
Gaoya dianqi, 2016 高压断路器在开断短路电流时,触头间建立起的电弧电压和试验回路的作用,使得电流过零前短路电流波形发生畸变。依据IEC 62271-101:2012附录A,理论分析了电弧电压为恒值和线性增长时的畸变电流表达式,以MATLAB/Simulink仿真环境为平台,建立了电弧电压为恒值和线性增长时短路电流的动态数学仿真模型,并以1 100 k V/63 k A试验方式T100a断路器为例应用仿真模型计算了电弧电压对电流半波幅值和持续时间的衰减百分比,计算结果可以为断路器短路试验时提供理论参考。
王超武, 高享想, 李刚, 刘浩军
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Nickel oxide (NiO)‐based electrodes with high theoretical specific capacitance can effectively increase the energy density of supercapacitors—the key factor limiting their practical deployment. However, several issues still restrict the production of advanced NiO‐based electrodes.
Ya‐Min Feng +10 more
wiley +1 more source
Gaoya dianqi, 2010 对一种以射频三极管为主要元件的脉冲产生电路进行了计算和试验研究,研制了用于模拟PD信号试验的放电源,设计了储能电容为10pF和20pF的两种脉冲电路,讨论了放电源中主要器件雪崩三极管的雪崩效应理论,推导出三极管雪崩过程的简化模型,用电路仿真软件Pspice仿真分析该电路中储能电容和电源电压对脉冲波形的影响。详细讨论了实际制作过程中的注意事项和元器件的选择方法。实测储能电容为10pF和20pF的PD源脉宽分别为980ps和1180ps,幅值分别为8.9V和11.6V。结果表明,理论和仿真分析的结论一致。
曾丽, 胡晶晶, 唐炬
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Platinum (Pt) single‐atom catalyst (SAC) shows great promise for hydrogen evolution reaction (HER), but faces a huge challenge in activity enhancement due to the isolated single‐atom sites. Fabricating support with partially amorphous (pa) structures to realize the synergetic interaction in neighboring single atoms could facilitate H2O ...
Yanhui Song +9 more
wiley +1 more source
Gaoya dianqi, 2012 为了对高压输电线路电压谐波含量进行直接测量,及时了解输电线路谐波情况,笔者提出了一种基于场强法测量高压线路电压谐波信号的新方法,克服了传统测量方法不能获得高压线路电压谐波信号的问题。通过建立场强法获得电压信号的数学模型,并从理论上证明了其正确性;同时设计了谐波检测仪实际测量电路,验证了理论的正确性。高压输电线路谐波检测仪可以方便地检测出高压线路上电压的谐波含量。
张金波 +3 more
doaj
, 1983 沿极光区磁力线大约在2000公里到8000公里的高度范围内,存在着一个等离子体湍流和大尺度平行电场的加速区。沿磁力线运动的等离子体片中的电子通过此加速区时,受到等离子体湍流和平行电场的共同作用,形成电子沉降的倒V结构。从一维准线性的动力学方程出发,导出了沉降电子通量的能谱方程,得出了电子通量能谱的理论公式。对等离子体湍流和平行电场对沉降电子能谱的影响作了分析和讨论 ...
黄迎雷, 刘振兴
core +2 more sources
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Te‐free BiSbSe3 is a promising medium‐temperature thermoelectric (TE) material owing to its cost‐effectiveness and intrinsically low lattice thermal conductivity. However, its comparatively low electrical conductivity has severely hindered the optimization of TE performance.
Xiaowei Shi +10 more
wiley +1 more source