提出了面向产品生命周期的产品模型、产品结构模型的装配拓扑树和零件拓扑树以及产品模型与产品开发过程的进化过程。
The product model and the evolution of product and process are set up for product lifecycle. And the assembly topology tree and part topology tree are constructed.
从静态和动态两方面研究了食品加工业供应链的拓扑结构模型； 研究了食品加工业供应链的体系结构；
Topological structure models of the supply chain in the food processing industry are studied from both static and dynamic aspects.
多面体链环是这些生物体的结构模型，在一定程度上，反映了生物分子的一些拓扑性质。
Polyhedral links are the structure model of these biomolecules, and reflect their topological properties in a degree.
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