在分析机械产品知识表示形式的基础上，提出基于语义对象的产品知识表达模型方法，阐述了机械产品知识表达模型的信息构成。
According to analyzing methods of knowledge representations for mechanical products design, a new knowledge representation model based on semantic object is described.
虚拟产品设计的关键技术是如何从现实中提取产品知识信息的模型，对知识进行分类和表达，有效地建立知识信息库和知识模型。
The key technique of virtual product development is how to obtain knowledge models from reality, to knowledge classification, express, to build knowledge base and knowledge models effectively.
设计了基于本体的产品知识结构-行为-功能表达模型。
Product knowledge and S-B-F representation model based on ontology were designed.
文中从产品知识表达存在的问题出发，提出了基于本体的产品知识表达四层模型，即结构层—行为层—基本功能层—元功能层，给出了各层本体的表示模式。
Because some problems are in the product knowledge representation, so gives the four layers to solve it, which contains the structure layer, behavior layer, basic-function layer and meta-function lay.
文中从产品知识表达存在的问题出发，提出了基于本体的产品知识表达四层模型，即结构层—行为层—基本功能层—元功能层，给出了各层本体的表示模式。
Because some problems are in the product knowledge representation, so gives the four layers to solve it, which contains the structure layer, behavior layer, basic-function layer and meta-function lay.
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