然后，分析了船舶供应链的复杂性特征，构建了一个多周期、多产品、多约束的基于复杂系统理论的层级船舶供应链协调模型。
This paper described the domestic and international theoretical research of the complicated system theories and the coordination mechanism of supply chain firstly.
您也可以在上述任一层级，根据您的安全性模型，建立具有特定使用权限的自订群组。
You can also create custom groups at any of these levels with specific permissions to better fit your security model.
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