巴特沃思，切比雪夫1型，椭圆模拟滤波器原型的设计代码，每一种滤波器的幅频响应响应曲线-Butterworth, chebyshev type 1, elliptical analog filter prototype design code, the amplitude frequency response of each kind of filter response curve

外文资料里面的源代码，双向PCS控制仿真，基于chebyshev的水声信号分析。- Foreign materials inside the source code, Two-way PCS control s