Considering arranging train paths as arranging a periodic event, in virtue of the periodic constraint graph and the periodic tension model, the periodic train diagram network model is established.
将安排列车运行线的问题看作周期事件安排问题，并借助周期约束图及周期势差模型，可以建立周期运行图网络模型。
The reduction is carried out by using geometric constraint graph based on the point clusters. Then the sequence of reduction is computed and the geometric model is rebuilded.
该算法基于点簇对约束网络图进行归约，求得归约序列然后重构几何模型，具有求解速度快、可靠性高、应用范围广等优点。
In this paper, a method to build geometric constraint model of 2 dimensional drawing based on undirected graph is presented.
本文提出了一种基于图结构描述的二维图形几何约束模型的建立及存储方法。
A constraint relation dependence graph (CRDG) is applied to express the dependence of coupling constraints, and establish the numerical and symbolic coupling constraints model.
采用约束关系依赖图(CRDG)表达耦合约束之间的依赖关系，从而建立数值与符号耦合约束模型。
And the constraint-graph-model-de-fined constraint graph is generated by using improved vertical plane scanning algorithm.
并利用改进的垂直平面扫描算法生成由约束图模型定义的约束图。
And the constraint-graph-model-de-fined constraint graph is generated by using improved vertical plane scanning algorithm.
并利用改进的垂直平面扫描算法生成由约束图模型定义的约束图。
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