Maxwell's equations conserve certain properties-the magnetic field intensity, 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。
It sums up the definition, general expressing formula and general calculating method of flux in any vector field by analyzing the flux in the speed field, electric field and magnetic field of fluid.
文章通过对流体的速度场、电场和磁场中通量的解析，总结出了任意的矢量场通量的定义、一般表达式及一般计算方法。
In this paper a vector controlled ac speed-regulating system is developed, which adopts the rotor flux field-orientated theory to meet the requirements for an electric traction system.
本文依据矢量控制的基本原理，针对电力牵引系统对电机控制性能的要求，设计了基于转子磁场定向的矢量控制交流调速系统。
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