用窗函数法hamming设计的FIR数字低通滤波器，能够实现心电信号中随机噪声的去除,Hamming window function method with the design of FIR digital low-pass filter, ECG can be achieved in the removal of random noise

Matlab下利用同余算法产生一组伪随机数，并利用中心极限定理构造正态分布序列，验证其正态性并编写自相关函数计算其自相关-using the congruence algorithm to generate a set of pseudo-random number , and use the central limit theorem to construct a normal distribution sequence, and then verify the normality and u