Well, it turns out we can do the same thing in space and that is called Stokes' theorem. What does Stokes' theorem say?
我们发现，在空间里面也可以做一样的事情，那是Stokes定理，Stokes定理说了什么呢？
And that's why the flux for S1, and the flux for S2 were the same a priori and we didn't have to worry about which one we chose when we did Stokes theorem.
这就是为什么S1的通量，和S2的通量是相同的，当运用Stokes定理时，我们不用担心，选的是哪一个面。
Well, the orientation I should have for Stokes theorem is that Well, if you look at the convention around here, it tells us that the normal vector should be going this way.
对于Stokes定理中的定向——，观察这里，它的法向量应该是这个方向。
Stokes' versus Green. I want to show you how Green's theorem for work that we saw in the plane, but also involved work and curl and so on, is actually a special case of this.
我想让你们看到，格林公式是怎么在这个平面中运用的，但是也牵涉到功和旋度等等，这也是比较特别的地方。
If we apply Stokes' theorem to compute the work done by the electric field around a closed curve, that means you have a wire in there and you want to find the voltage along the wire.
如果用Stokes定理计算的话，电场对一条封闭曲线做的功，比如说，电厂中有一个金属线圈，想要知道金属线圈的电压是多少。
Now, let's instead try to use Stokes' theorem to do the calculation.
现在使用Stokes定理来算。
Methods the method of shooting and bouncing rays was used to calculate the RCS and stokes theorem was used to improve the arithmetic.
研究复杂组合体目标后向散射场问题，并对射线跟踪法的典型算法进行改进，以提高计算精度和运算速度。
Methods the method of shooting and bouncing rays was used to calculate the RCS and stokes theorem was used to improve the arithmetic.
研究复杂组合体目标后向散射场问题，并对射线跟踪法的典型算法进行改进，以提高计算精度和运算速度。
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