For the characteristics of the diagnosis object, the knowledge express method based on production rule and neural network are adopted as the knowledge express method.
针对诊断对象特点，知识表示采用基于产生式规则和基于神经网络两种知识表示方法。
It proved that the method of ontology modeling and formal representation mechanism can better express the knowledge structure of emergency field. It is available.
结果证明，这种本体建模方法和形式化表达机制，能够较好表达应急领域的知识结构，是可行的。
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