实现最简单的HMM的模型例子，给定一组观察值，训练HMM的模型；再给出一组观察值，评估出其状态值 -Realize the simplest HMM model example, given a set of observations, training of HMM model To give a set of observations,　uate its status value to achieve the simplest HMM model example, given a set of observations, training of HMM model To give a set of observations,　uate its status value