详细叙述知识模型的知识表示、知识获取和知识重用方法。
Knowledge representation, gain and reuse of knowledge model are introduced in detail.
系统采用了基于权重规则、基于产生式规则和基于模型的知识表示方法；
The weight-based rule, the product rule and the model-based rule is established to present the knowledge.
此外还提出了与数据无关的多叉树层次结构模型的知识表示方法，它具有很强的表达能力并易于扩展。
The data-independent multi-branch tree hierarchical structure is proposed for the knowledge representation, because it has strong expressing ability and can be easily expanded.
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