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在分析水电厂辅机系统故障征兆信息特点之后，提出基于分层因果诊断原理获取知识，并采用面向对象的知识表达与推理方法，构造水电厂辅机系统故障智能诊断系统。
After analyzing the characteristics of fault symptom information of auxiliary system in hydropower plant, this paper puts forward a method to acquire knowledge based on hierarchical causal diagnosis principle and adopts object-oriented knowledge representation and reasoning method to construct fault intelligent diagnosis system for auxiliary system of hydropower plant.