差分演化的蒙特卡洛算法通用程序，修改舒服初始模型prior及其最大似然函数即可(solves an important practical problem in RWM, namely that of choosing an appropriate scale and orientation for the jumping distribution.)

用random walk metropolis算法计算标准正态分布的收敛(Using Markov Chain Monte Carlo Method to Calculate the Convergence of Standard Normal Distribution)