下面举个演示性例子,说明专家系统的基本工作原理。假定知识库里有13条规则,能识别七个小麦品种。13条规则如下(本应按规则1那样排版,因限于篇幅,规则2～13,把它连在一起——编者):规则1:如果:颖壳是圆颖则:是圆颖多花类规则2:如果:芒是曲芒,且多花则:是圆颖多花类规则3:如果:植株上有褐斑孢子堆,且在秆子上 The following is a demonstration example to illustrate the basic working principle of the expert system. Suppose there are 13 rules in the knowledge base that identify seven wheat varieties. The 13 rules are as follows (this should be typeset as in rule 1, due to space limitations, rules 2 to 13, put it together - Editor): Rule 1: If: Ying shell is round Ying Ze: Rule 2: If: Mount is a song mangle, and spend more is: is more than flowers Ying Ying rules 3: If: plants have brown spots on the pile, and in the stalk