Maxwell's equations conserve certain properties-the magnetic fieldintensity, the electric displacement field and the Poynting vector that describes the electric flux of an electromagnetic field.
麦克斯韦方程中有某些特性是恒定不变的——磁场强度、电位移场以及描述电磁场电通量的坡印廷矢量。
2
Through the analysis and contrast of the electric - fieldintensity on the anode boundary, the cathode shape designed is tested further and its accuracy is evaluated.
通过阳极边界电场强度的分析与对比，进一步验证所设计的阴极形状，评价阴极的设计精度。
3
The reason was that, in high applied voltage, the average intensity of electricfield was higher than that of external electric field for the ionization of impurities and defects.