What it says on each small flat piece — it says that the line integral along say, for example, this curve is equal to the flux of a curl through this tiny piece of surface.
它可以对任一个小平面使用-，比如说对于这条曲线的线积分，等于通过这个曲面的旋度通量。
2
The equipment operating condition of flat membrane ultrafiltration was determined experimentally, which including stirred speed, pressure, flux ratio.
通过实验确定了平板膜实验装置超滤过程的操作条件，包括搅拌转速、操作压力、流量比等。
3
The calculated results of current density and heat flux on flat weld pool surface using model established in this paper are agreed with experiment.