Study on brain electrical characteristics for two dimentional ( 2d ) real head models the brain electrical characteristics have been analyzed for 2d four layers concentric sphere head model , axial real and sagittal real head models from mri pictures . the equi - potential lines can be gotten in different drive patterns and it shows that the sensitivity for the resolution region , especially the center region in opposite drive pattern is more than others because the head bone has very low conductivity . the potential distributions change with conductivity increase and reduce within head 进行了基于eit技术的二维( 2d )脑电四层同心圆头模型和真实头模型的电特性分析计算对2d四层同心圆头模型和山mri技术获得的头的断层图片构造的2d轴位真实头模型及2d矢位真实头模型的电特性进行分析，给出了各种激励情况下的等电位线分布。
Verification of extraneous conductive parts in response to trade enquiries , we take this opportunity to explain one of the determination methods for extraneous conductive parts and their bonding requirements as specified in the code of practice for the electricity ( wiring ) regulations ( cop ) . the provision of equipotential bonding can effectively reduce the risk of electric shock arising from faulty electrical installations 本署收到多宗业界关于确定非电气装置金属部分及其等电位接驳的查询，我们希望藉著今次通讯，向大家讲解测定非电气装置金属部分的一种方法及其在《电力(线路)规例工作守则》 (下称工作守则)中的等电位接驳要求。
The research shows that the protection of the industrial control system are not only need the external lightning protection system such as air terminals , down conductors and grounding system , but also need the internal lightning protection system such as equipotential bonding , shielding and surge protection of information system and electrical system 经研究，对工业控制系统的防雷保护不仅要做好接闪器，引下线，接地体等基本的外部防护，还要做好等电位联结，屏蔽，信号系统和电源系统的电涌保护等相关内部防雷措施。
