针对汽车发动机振动信号的非线性特点，将分形理论应用于发动机的故障诊断。
By researching the characteristic of automobile engine, the fractal theory was used to diagnosis the fault of engine.
应用分形集合分割原理，对故障模式进行了层次划分，建立了发动机层次知识组织模型。
Using fractal set cutting principle, the gradation classifying of model is given, and consequently the gradation organization model of engine is obtained.
“翔龙”在机身上V -形尾翼之间装备一台喷气发动机。
Xianglong is equipped with a jet engine mounted on top of the fuselage between the V-shape tail wings.
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