On the basis of study of the relation between the symptoms and the causes of diesel engine faults, this paper presents a two level fuzzy comprehensive evaluation method of fault diagnosis.
在对柴油机故障原因和故障症状之间的关系进行分析的基础上，采用二级模糊综合评判方法对柴油机的故障进行诊断。
Fuzzy diagnosis of vibration faults on mine hoist has been made by use of theory of fuzzy mathematics. A fuzzy comprehensive evaluation mathematics model is established.
应用模糊数学理论对某矿井提升机振动故障进行了模糊诊断，建立模糊综合评价数学模型。
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