产生符合高斯分布N( u, a*a)的随机数，然后用参数估计法估计相应的 和 产生尺度参数为 的指数分布，并且估计参数 的取值和根据我介绍的方法产生GGD分布的随机数，形状参数为c =1.0-That meet the Gaussian distribution N (　u, a* a) of the random number, then the corresponding parameter estimation method to estimate 　and 　　generated for the scale parameter of exponential distribution, and the values ​ ​ of estimated parameters, and according to my 　introduced GGD distribution method produces a random number, the shape parameter c = 1.0