基于光束法的严密结算方法，根据条件共线方程列立的约束方程-Based on the tight beam law clearing method under conditions of total equation out of the equation legislation

求槽内电位分布和HALLEN方程的Matlab程序，共三题，源自电磁场数值方法课后例题。- groove potential distribution and HALLEN equation of Matlab, three questions from electromagnetic numerical method, the sample after class.

Based on the Duffing equation, a Duffing oscillator algorithm (DOA) to improve the signal-to-noise ratio (SNR) was presented. By simulated and experimental data sets, it was proven that the signal-to-noise ratio (SNR) of the weak signal could be gr