本程序设计了一个以跷跷板为原型的图像模型。该模型由一个长方形，两个正方形 和一个三角形组成-This procedure is designed as the prototype of a seesaw image model. The model consists of a rectangular, square and a triangle composed of two

基于Butterworth模拟滤波器原型，使用双线性转换设计数字滤波器-Bilinear transformation design digital filters based on the Butterworth analog filters prototype,