圆形探头超声声场仿真，可通过改变换能器尺寸和声场设计来计算声场的聚焦点变化，也可以改变换能器聚焦的曲率半径大小-acoustic field simulation

学进一步了解分类器的设计概念,能够根据自己的设计对线性分类器有更深刻地认识-Learn the further understanding of the classifier design concept, can according to your own design of linear classifier has a deeper understanding