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基于面向对象的思想，论述了诊断问题的分类层次和证据模式，提出用面向对象的框架结构表达诊断知识的模型，并给出其推理过程，以此为基础，用ＢｏｒｌａｎｄＣ＋＋语言实现了层次分类诊断模型，并将其应用于汽轮发电机组的故障诊断系统中．
Based on the idea of object-oriented, this dissertation discusses the classification level and evidence mode of diagnosis problems, proposes a model of diagnosis knowledge using object-oriented framework and gives its reasoning process. Based on this, it implements hierarchical classification diagnosis using Borland C ++ language Model, and apply it to the fault diagnosis system of steam turbine generator set.