说明： x(n)的心电脉冲函数,通过滤波器H1(z)、H2(z)、H3(z)后的对数频率响应20log[Ha3(ejw)]函数 (x (n) function of the heart electrical pulse through the filter H1 (z), H2 (z), H3 (z) after the logarithmic frequency response 20log [Ha3 (ejw)] function)
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