说明：  信号、系统和系统响应 1、理想采样信号序列 2、单位脉冲序列 3、矩形序列 4、特定冲击串 5、卷积计算 6、卷积定律验证
(signal system and a system response, the ideal sampling signal sequence 2, unit 3 pulse sequence, the sequence of four rectangular, specific impacts Series 5, 6 convolution calculations, convolution law certification)