A longstanding and common design pattern for data modeling is the division of the data model into three parts: a conceptual model, a logical model, and a physical model.
数据建模中一种常见并被长期使用的设计模式是将数据模型分为三部分：概念模型、逻辑模型和物理模型。
George explains the Architecture Modeling process from different perspectives such as Engineering Use Models, Conceptual Model, Domain Model, Design Model and the Code Model.
George从多个视角阐述了架构建模过程，比如用例模型、概念模型、域模型、设计模型和代码模型。
Further, the paper study modular assembly design in the conceptual design step, and make assembly constraint modeling through constraint classification.
进一步研究了概念设计阶段的模块化装配设计，并在分析了装配约束分类的基础上实现装配约束建模。
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