The conceptual model of the discipline architecture is represented through an extended entity-relationship approach.
用扩展的实体—联系方法描述学科体系结构的概念模型。
In this paper, we analyze the shortcomings of hierarchical structure, and build product model with extended entity relationship (EER) approach. A product model of fuel pump is shown as an example.
该文分析了递阶结构表达方式的不足，利用扩展的实体关联(eer)表达方式建立了产品的数据模型，并以油泵产品为例建立了产品数据模型的展开结构。
In this paper, we analyze the shortcomings of hierarchical structure, and build product model with extended entity relationship (EER) approach. A product model of fuel pump is shown as an example.
该文分析了递阶结构表达方式的不足，利用扩展的实体关联(eer)表达方式建立了产品的数据模型，并以油泵产品为例建立了产品数据模型的展开结构。
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