So, that's by the divergence theorem using the fact that s is a closed surface.
所以那是通过散度定理得到的，其中使用了S是封闭曲面这一事实。
This one here, the divergence theorem, tells you something similar but now for a region of space bounded by a closed surface.
这个就是散度公式了，告诉大家一些相似的东西，仅仅是对被闭合曲面包围的空间区域来讲的。
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。
The convention in the divergence theorem is that we orient the surface with a normal vector pointing always outwards.
在散度定理中的约定是,将曲面的定向取为外法线的方向。
So, remember, when we set up the divergence theorem, we need the normal vectors to point out of our region, which means that on the top surface, n But, on the bottom face, we want n pointing down.
当我们建立散度定理时，我们要使法向量指向区域外，即在上表面时，要指向上方。，we，want，n，pointing，up。,但是，在下表面，要使n指向下面。
Earthquake activity is confined to a rather shallow surface zone along such belts of divergence.
地震活动就限制在沿着这种扩散带的较浅的表面地带上。
The orthogonal surface equation of the collimating micro-lenses array is derived, the divergence angles after collimating and the parameters of the focused lens are calculated.
推导出了正交的两组准直微透镜阵列的面形公式；计算了准直光束的准直精度和聚焦光学系统参数。
Green's theorem and applications, triple integrals, line and surface integrals in space, Divergence theorem, Stokes' theorem; applications.
格林定理及其应用、三重积分、空间中的线积分和面积分、散度定理、斯托克斯定理应用。
Green's theorem and applications, triple integrals, line and surface integrals in space, Divergence theorem, Stokes' theorem; applications.
格林定理及其应用、三重积分、空间中的线积分和面积分、散度定理、斯托克斯定理应用。
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