起电的

This article elaborates the full-scale test at present electric railway bow net system, designs a new control system to fall the Pantograph fall and introduces a home unusual, controlled Pantograph fall in the busy host skeleton line. This research provides reference for the furthur study of bow net protection system by artificially creating the real appearance of bow net relations.

从实际试验出发，阐述了在目前电气化铁路弓网系统中，对弓网保护装置所起作用的一种验证方法，同时构思和设计了一种新型的受电弓滑板掉块控制系统，并介绍了一次国内少有的、在繁忙主干线上控制受电弓滑板掉块造成人为弓网关系再现的真实过程，为进一步开展弓网保护系统研究提供参考。

The origin of electrification in clouds is an old and still unsolved problem.

云中起电的缘由是一个古老但仍未解决的问题。

Biatrial and right ventricular triple chamber pacinmg is founded through implanting coronary sinus lead to pace left atrium on the base of conventional right atrial and right ventricular dual chamber pacing,which realizes the synchrony of electrical activities in both two atriums,remove interatrial conduction block and interatrial reentry,and prevent and treat atrial tachyarrhythmias induced by interatrial conduction block.

在常规右房、右室双腔起搏的基础上，植入冠状窦电极起搏左房，建立双房右室三心腔起搏系统，实现双房电活动的同步化，消除房间传导阻滞和房间折返，防治由房间传导阻滞引起的房性快速性心律失常。

Chapter 1 of the dissertation reviews the developing history and the state-of-art of the study in electrification numerical simulation in thunderstorms, discuss the effect of electric environment on development of dynamics and microphysics, depicts the problems in this area.

第一章主要介绍了国内外关于雷暴起电数值模拟以及电环境对雷暴微物理和动力过程影响研究的现状，并分析了存在的问题。

The results show that electric development depends highly on ice phase microphysical processes, and inductive and noninductive charging mechanisms play a role in evolution of electric structure inside thunderstorms.

结果表明：感应和非感应起电机制是雷暴云中电结构形成的主要因素，雷暴云中起电活动的强弱很大程度上依赖于冰相物的出现时间，对流运动与起电过程的关系主要体现在对流运动影响着云中的凝结和冻结过程，从而与冰相物出现的时间有关。

Charges accumulation and electric field development within two convective clouds which had different degree of convection and wind shear in Changchun were simulated by introducing an improved noninductive charging mechanism including the influence of particle diameters and impact velocity into the three-dimensional dynamics and electrification coupled model.

在三维强风暴动力和电耦合数值模式的基础上，考虑了粒子直径及降落末速差对转移电荷的影响，把非感应起电参数化方案作了进一步改进，对长春地区两次不同强度、不同环境风切变的对流云内电荷累积和电场发展过程进行了模拟分析。

It is presented that indirect assimilation experiment of CMW data from TCFM method improves effectively not only on vertical velocity field but for precipitation.4 Based on theory analysis, E-Ir relationship is brought forward with two electrification mechanisms. One is inductive mechanism, i.e., cloud particles collide with precipitation particles then flick away, the other is noninductive mechanism because of different temperature, i.e., bigger supercooled cloud particles collide and freeze with hail particles combined with ice scraps. By means of CINRAD and FY2C data assimilation, precipitation intensity Ir can be obtained, then electric field intensity E, discharge time and locations can be achieved with supposed threshold 300KV/m. Though it can not distinguish between IC (Intra-Cloud) lightning and CG (Cloud-to-Ground) lightning, results are still comparable to LLS observations.5 Example analysis shows that the relationship between precipitation data from AMS and CG data from LLS is not very clear.

同化实验对于台风眼区的螺旋形雨带贡献显著，说明TCFM云导风资料同化实验不仅有效调整了模式的垂直速度场，还对降水模拟有了明显改善。4通过理论分析，利用云粒子与极化降水粒子碰撞并弹离的感应起电机制和较大过冷云滴与雹粒碰冻并产生冰屑的温差起电机制下得到的E-Ir，由雷达、卫星遥感资料直接和间接同化模拟得到Ir，来反推E，了解雷暴云中闪电强度的平面分布，设置放电阈值为300KV/m，推算出放电的位置和首次发生闪电的时间。

In fact, any two objects friction, can be electric. The mid-18th century, American scientists Franklin through analysis and research, that there were two different nature of electricity, called positive and negative charges.

其实任何两个物体摩擦，都可以起电。18世纪中期，美国科学家富兰克林经过分析和研究，认为有两种性质不同的电，叫做正电和负电。

It can simulate charging testmethod, corona charging decay testmethod and triboelectric testmethod. In the part of signal receiver, signals which p resented the electrostatic potential of detected objects were collected by non2contact direct induction type electrostatic sensor. It utilized the capability of counting time of single chip computer to measure p recise electrostatic charge decay time in coordinate with the p rogram designed by C51 language.

它能够模拟充电、电晕喷电、摩擦3种起电方式，接收部分采用直接感应式非接触式静电传感器测量被测材料表面的静电电位，并利用单片机本身的定时计数功能，配合C51单片机语言设计相应程序，测得精确的静电电荷衰减时间。

Voice mail, they are, in effect, pickingup a book and leafing through the pages.

当客户拿起他的电话筒，实际上相当于他们拿起一本书，翻开了书本。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。