中文说明： 该代码采用集中式BAYES融合检测，对于任意给定P0时给出最优融合准则，以及融合系统贝叶斯风险随先验概率P0变化曲线
English Description：
The code adopts centralized Bayes fusion detection, gives the optimal fusion criterion for any given P0, and the Bayesian risk curve of fusion system with prior probability P0