说明：  计算任意位置的圆形线圈和方形线圈的互感。在MATLAB的GUI界面上可以设定线圈参数和位置，并在图像上显示。给定参数后可以计算出给定位置处线圈的互感，并可以生成互感随线圈位置变化的曲线。
(Calculate the mutual inductance of the round coil and square coil which are at any position. On the GUI interface of the MATLAB, you can set the coil parameters and positions and the program will display them on the image. After given parameters, the mutual inductance of the coil at the locating position can be calculated, and the curves of mutual inductance with the coil position can be generated.)