贝叶斯网络应用的一个例子，吸烟患病模型
1建立贝叶斯网络结构并制定条件概率表
2画出建立好的贝叶斯网络
3输入证据,进行推理
4显示推理结果(An example of a Bayesian network application, the smoking model
1 Establish a Bayesian network structure and establish a conditional probability table
2 draw a well-established Bayesian network
3 Enter evidence to make reasoning
4 shows the reasoning result)