不知道各位有没有做功放产品的，如果有的话遇到功率计算问题，就可以参考此文章-not know you do not have power amplifier products, if any, problems encountered power calculation, we can refer to this article

地理信息距离计算参考文献，都是有用的，可以参考一下-Geographic information distance calculation references are useful

可以用来计算差分方程，以及计算波导模式，并在曲面上作图。-It can be used to calculate the differential equation, and the calculation of waveguide mode, and plotted on the surface.