点电荷在两无限大均匀电介质中的电场及电位移矢量.图像显示是VC+OpenGL-Point charge in two infinite uniform dielectric the electric field and electric displacement vector. Image display is VC+ OpenGL

仿真模拟环形电流产生的磁场和电场，用matlab编程(The magnetic field and electric field generated by the annular current are simulated and programmed by MATLAB.)