The contribution of anodic electric field to cathodic protection potential distribution of a tank bottom for different depths of anode and different horizontal distances between anode and tank is studied through calculating examples 摘要通过计算实例研究了在不同的阳极埋深和距罐体水平距离下阳极电场对罐底板外侧阴极保护电位分布的贡献。
If injecting an invariable alternating current into patient ' s brain , the brain edema or haematoma in the brain will change the interal electric field and the distribution of voltage on the brain ' s surface 如果对病人大脑注入此电流，由于病人大脑内部的血肿和水肿改变大脑内部的组织结构，也就改变了的大脑内部的电场和大脑表面的电位分布。
When formed for 8h , because most of paste on the negative plate has converted into lead , the polarization increases and the potential changes greatly , these distributions on the two kinds of negative plates become non - uniform again 当化成8h时,由于负极板上的铅膏大部分转化为铅,极化上升,电位变化很大,所以两种负极板上电流密度和电位分布又变得不均匀。
When it is discharged at high - rate , the distributions are also the most uniform at the end of the discharge . this indicates that the positive plate with the red lead has the better discharge performance than the other two kinds of positive plates 含红丹的正极板在化成初期电流密度和电位的分布最均匀,极化最小,在高倍率放电结束时,其电流密度和电位分布也最均匀,表明含红丹的正极板的放电性能比其它两种正极板好。
Next , basing on discrete electric potential , plots the distributing figure of the electic potential and electic field , and analyzes relationship between the operational characteristics of static induction transistor and the structure parameter and bias voltage 其次依据求得的离散电位值，绘制相应的电位分布图形和电场分布图形。最后通过对图形的分析，解析有机静电感应三极管的工作特性与器件结构参数和所加偏压的关系。
The numerical computing methods of the equations involving the static electric - magnetic field , electronic motion in the static electric - magnetic field , and so on are detailed . the methods of the boundary disposal are introduced . the phenomenon of secondary electron emission has also been studied 介绍了数值计算方法,包括静电磁场的数值计算、在静电静磁场中电子运动轨迹的数值计算、空间电荷密度的数值计算和空间电位分布的数值计算;介绍了边界处理方法。
The current trends of this field is to acquire the current density of dipole distribution rather than a few dipoles . based upon that , a new model was proposed - dipole layer localization method ( dllm ) : spherical dipole layer was used as source model , on which dipoles were distributed by equilateral triangles ; three concentric inhomogeneous sphere was used as head model , which contains scalp , skull and cortex with different conductance . the dipole distribution and scalp potential tomography were obtained with singular value decomposition ( svd ) 鉴于该领域的研究趋势已从求取少数偶极子过渡到偶极子分布密度的获得，本文提出了新的模型? ?偶极面定位方法( dipolelayerlocalizationmethod ， dllm ) ：以等边三角形均匀分布的偶极子构成的偶极面(球面)作为源模型；包括头皮、颅骨和皮层的三层同心介质球作为头颅模型，运用奇异值分解来求解逆问题，从而获得偶极子分布和头皮电位分布，实现三维成像。
The second part is a detector which is used to detect the distribution of voltage on the patient ' s brain surface from all different directions . the third is a mixed signal processor ( c8051f020 ) which is used to control the other parts of the system and display some necessary information and convert the voltage signals into digital signals , as well as transmit the acquired data to the computer . the fourth is computer with eit software which is used to analyze and process the received data and construct a picture for the brain edema and haematoma on screen 32通道电阻抗断层成像系统由4个部分组成：第一部分是正弦波恒流源，用来产生注入大脑的激励电流；第二部分是电位信号的提取与转换，用来提取当激励电流注入时，在大脑表面形成的电位分布信号；第三部分是数据采集与控制系统，用来控制激励电流的频率，注入方向，注入强度，控制采集大脑表面的电位分布信号，并且将这些采集的电位分布数据传到pc机；第四部分是计算机eit成像软件，用来接收下位机的电位分布数据，并且对这些数据进行分析计算，重建电阻抗图像。
This paper researches on the practical current and potential distributions on the positive and negative plates of automotive batteries in the course of their formation processes by the means of an in situ electrochemical scan , and then studies the influences of the formation and also the additives on the performance of the automotive plates 本文利用电化学扫描方法研究铅酸蓄电池正负极板在化成过程中电流密度和电位分布及化成对极板电性能的影响。同时分析了正负极添加剂的性质及其对极板性能的影响。
During the formation , the positive plates with red lead and bapbo3 additives are easier formed than that without additive , so the current and potential distributions on the plates with additives are more uniform than that without additives in the early stage of the formation . these distributions on the plate with red lead are the most uniform , and the polarization is the smallest 在正极板化成过程中,含红丹和铅酸钡铅膏的正极板比不含添加剂的正极板更容易化成,所以在化成初期含添加剂正极板的电流密度和电位分布比不含添加剂正极板上的电流密度和电位分布更均匀。
