The result also obtains from calling neural network knowledge base when it can not search the right match fault cause in the expert system knowledge base.
如果在专家系统知识库中搜索不到完全匹配的故障，则调用神经网络知识库进行推理，得出诊断结果。
The correspond to oil field experience expert system knowledge base and expression have been established, positive and negative mixed inference control strategies have been designed in this system.
根据系统改造设计中所需的领域知识，建立了相应的专家系统知识库及表达形式，设计出正反混合推理的控制策略。
Power network structure knowledge is the base of expert system used in power system. The will of knowledge representation affect the work efficiency and currency of expert system.
电网结构知识是应用于电力系统的专家系统工作的基础，知识表示方法的优劣直接影响专家系统的工作效率及系统的通用性。
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