The result also obtains from calling neural network knowledgebase when it can not search the right match fault cause in the expertsystemknowledgebase.
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。
2
The correspond to oil field experience expertsystemknowledgebase and expression have been established, positive and negative mixed inference control strategies have been designed in this system.
Power network structure knowledge is the base of expertsystem used in power system. The will of knowledge representation affect the work efficiency and currency of expert system.