The paper researched the key technologies of CBR method in the civil aircraft fault diagnosis: Applying the gray theory to the case similarity computation, and the difference derived method to case adaption.

• 再次,将该结构模型应用于民用飞机故障诊断系统,研究了民用飞机故障诊断系统中CBR关键技术的实现方法:将灰色理论应用于故障案例的相似度计算、采用了基于差异驱动的案例改写方法。