Based on the discharge theories of long air gap,a leader propagation model on lightning shielding failure is presented in this paper.
为评估、计算输电线路雷电屏蔽性能即绕击性能,基于长空气间隙放电理论建立了特高压直流输电线路雷电屏蔽的先导发展模型,并用该模型计算了拟建立的云广±800 kV直流特高压输电线路雷电屏蔽性能。
Considering the randomness of leader propagation,a lightning stroke simulation model on lightning shielding performance of transmission line was presented,in which the simulation charge method was applied.
为准确评价线路的绕击耐雷性能,考虑先导发展随机性,运用模拟电荷法,建立了输电线路雷屏蔽性能的雷击仿真模型。
This paper investigate the development, the breakdown process, and the discharge path selection of the lightning leader while there exsit corona iorns in the space.
为探明当空气中含有电晕产生的离子时(离子背景),对雷电先导的发展、击穿过程和路径的选择有何影响,分别采用两种不同的实验方法研究了正、负离子流对先导放电进展路径影响的特点及规律,两种方法得出的一致结果表明,有离子背景的雷电先导放电路径具有选择负离子背景而回避正离子背景的特点和规律并运用电子崩发展和电场作用两方面原理,分析了离子背景的影响机制。
12,300 Porteous piloted missiles,,,
12300枚先导控制导弹。
Be a preparation for or an introduction to
作为的准备或先导，导致
They were in the van of civilization.
他们是文明的先导者。
Drunkenness is the leading card to all evils.
酗酒为一切罪恶之先导。
The motorcade waspreceded by motorcycles.
摩托车为车队作先导。
Pilot-operated reducing valves
GB/T12246-1989先导式减压阀
pilot gas-injection project
先导性注气试验方案
pilot neurosurgical rehabilitation programme
神经外科康复先导计划
They are in the vanguard of technological advance.
他们是技术发展的先导。
Steering Group on Pilot Project on Integration of Children with Special Needs in Ordinary Schools
融合教育先导计划督导小组
Suddenly the leaders broke into a gallop.
突然先导马开始飞跑起来。
But error is often the precursor of what is correct.
但是错误常常是正确的先导。
Clinical Nurse Specialist Pilot Scheme [Hospital Authority]
临?专科护士先导计划〔医院管理局〕
"There's the whiffle-tree broken, sir," said the postilion;
“先生，”那向导说，“横木断了。
congenital atrioventricular conductional block
先天性房室传导阻滞
advanced medium-range air-to-air missile
先进中程空对东导弹
leaders of a movement or fashion
（运动或时尚的）先驱,先锋,领导者
First comes the question of Party leadership, which is the central factor for everything else.
首先是党的领导问题，党是领导一切的核心。