Now, I know that you guys are not necessarily fond of computing flux of vector fieldS for surfaces so maybe you don't really see the point.
好吧，我知道你们其实不喜欢，计算一个向量场中曲面的通量，所以你们可能不知道我为什么要这么做。
So, the divergence theorem gives us a way to compute the flux of a vector field for a closed surface.
散度定理为我们提供了一种，计算向量场通过闭曲面的通量的方法。
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 is a vector field in some of the flux things and so on.
也可以是一个向量场的通量，等等。
I'm going to prove that the flux of a vector field that has only a z component is actually equal to the triple integral of, RzdV well, the divergence of this is just R sub z dV.
我将要证明，一个只有z分量的向量场的通量,等于一个三重积分，其中被积表达式为。
But the usually traditional settings would be to take your normal vector pointing maybe out of the solid region because then you will be looking at flux that is coming out of that region of space.
但通常的习惯是,把立体区域上的外法向量规定为其定向,因为这么做之后，当你观察通量时会发现,它是从区域内部向外流动的。
But it could be that, well, imagine that my vector field accidentally goes in the opposite direction then this part of the curve, while things are flowing to the left, contributes negatively to flux.
的确有可能出现往两个方向流动的情况，可以想象到，这一小部分往相反方向流动，当流体向左流时，就只能算作负值了。
In particular, an easy case where you know you can get away without computing anything is, of course, if your vector field is tangent to the surface because then you know that there is no flux.
特别地，有一种简单的情况，是不用计算的，当向量场与曲面相切，没有通量。
So, that means that the double integral for flux through the top of R vector field dot ndS becomes double integral of the top of R dxdy.
这就是说通量的二重积分,顶部R•ndS的二重积分,变成了Rdxdy的二重积分。
Finally, simulating experiment for the whole system is carried through with the stator flux-oriented vector strategy and control arithmetic of rotor speed perturb and power observation.
最后本文采用定子磁场定向的矢量控制策略，结合转速扰动功率观测的控制算法对转子侧进行了仿真验证。
In vector control of induction motor, the key problem is to estimate rotor flux accurately.
异步电机矢量控制的关键问题在于精确地估计转子磁链。
This paper discusses the locus of flux linkage under soft-switching PWM pattern by using space voltage vector in detail.
该文利用空间电压矢量概念，深入分析了软开关pwm模式下磁链的运动轨迹。
It directly controls the electromagnetic torque and stator flux, using the analyzing method of space vector and stator flux orientation.
它采用空间矢量的分析方法，采用定子磁场定向，直接对电动机的电磁转矩和定子磁链进行控制。
The measurement and observation of flux in induction motor is a key problem in vector control system.
异步电功机的磁通检测和观测是矢量控制系统中的关键问题。
Based on the analysis of control strategy of the system, this paper used respectively voltage oriented and stator flux oriented vector control in grid side and rotor side of the converter.
在分析了该系统控制方法的基础上，建立了交直交变频器网侧电压定向以及转子侧定子磁场定向的矢量控制系统模型。
The fuzzy controllers were used to replace PID torque adjustor and PID flux adjustor of VVVF vector control system.
用模糊控制器代替VVVF矢量控制系统的PID转矩调节器和PID磁链调节器。
This paper analogy the selection of voltage space vector and the flux linkage estimate model of the direct torque control system of PMSM, and the realizing project of the system.
文章分析了永磁同步电机直接转矩控制系统的电压空间矢量选择和磁链估计模型，并提出了系统的实现方案。
The key to realize a practical rotor field oriented vector control system of inductive motor is both the calculative precision of flux model and the adjusting of PI regulator.
实现实际转子磁链定向矢量控制系统的关键是磁链模型的计算精度和环路PI调节器的正确整定。
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。
According to the characteristics of brushless doubly-fed wind turbine and adopting flux linkage oriented vector transformation control technology, a new type of power control system is developed.
根据无刷双馈电机的特性，采用磁链定向的矢量变换控制技术设计了一种新型功率控制系统。
So a virtual line flux has been constructed to serve as the oriented vector instead of the line voltage vector to remove the AC voltage sensors and reduce the cost of PWM rectifiers.
采用类似于交流电机磁链观测的方法来构造一个虚拟电网磁链，可以代替电网电压作为PWM整流器矢量控制中的定向矢量，达到省去交流侧电网电压传感器，降低PWM整流器成本的目的。
Based on the rotor flux vector control as a kind of variable speed system control method, with very good dynamic and static performance, received extensive attention.
基于转子磁链定向矢量控制作为交流调速系统中的一种的控制方法，以非常优良的动态和静态性能，受到了广泛的关注。
According to the flux acceleration principle, the influence of rotor parameters on the performance of vector control system with rotor flux orientation is analyzed.
根据磁场加速法原理，在理论上定性地分析了电机转子参数对矢量控制系统性能的影响。
The authors analyze the influence in vector controlled induction machine caused by parameter variation and main flux saturation affects speed estimation of adaptive state observer.
在矢量控制感应电动机系统中，当电机参数发生变化，或出现磁路饱和时，将会影响速度控制的准确性，使速度观测器精度受影响。
The amplitude and phase is estimated respectively through a double integrator close-loop, in stead of vector of flux, with angular and speed as feedback.
此方案以估计出的位置角为反馈量，采用闭环双积分结构，分别估计了定子磁链的幅值和相位。
An implicit flux vector splitting form in one-step with second-order accuracy was proposed for solving the transonic flow fields of air channels and cascades of diffusers.
提出了二阶精度隐式矢通量单步差分格式并用来求解跨压器进气道、叶栅的跨音流场。
Under ideal condition, one vector hydrophone can obtain infinite gain, if energy flux of noise can be counteracted in the entire space.
在理想情况下，若噪声能流在全空间能充分抵消，单个矢量水听器便可获得无限大的增益。
The axial dispersion in chromatography models was discussed with vector method and the effect of diffusion on the bulk flow flux with its partial quantity form was pointed too.
用矢量方法讨论了色谱模型中的轴向扩散项，指出轴向扩散项是扩散通量以分量的形式在主体流动通量上的页献。
In order to achieve a high performance of vector control for induction motor, the rotor flux must be estimated accurately.
为了实现高性能异步电动机矢量控制，必需解决转子磁链的准确估计。
The acoustic energy flux detector based on vector hydrophone using counteractive technique of spacial acoustic energy flux, can obtain spatiotemporal gain proportion with time-bandwidth product.
基于矢量水听器的声能流检测器利用空间声能流抵消技术相对于声压检测器可获得与时间带宽积成正比的时空增益。
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