说明：  此程序用于产生零均值单位方差高斯白噪声的1000个样点，并利用周期图法和平均周期图法进行自相关的估计。
(This program is used to produce 1000 sample points under the distribution of zero mean unit variance of Gaussian white noise , and the Periodogram method and average cycle diagram method are used to estimate the autocorrelation .)