Based on the former researches on the system modeling, the main model in the product integrated information model and the information in the recycling application model are described mathematically.
论文基于前面的系统建模研究，对产品集成信息模型中的主模型和回收应用模型所包含信息进行了数学描述；
Based on the former researches on the system modeling, the main model in the product integrated information model and the information in the recycling application model are described mathematically.
论文基于前面的系统建模研究，对产品集成信息模型中的主模型和回收应用模型所包含信息进行了数学描述；
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