virtual point

Based on the summary of the geometric and topological properties of wire harness technological graph, in this paper, the virtual frame and virtual point are introduced.

通用的CAD模型在解决上述问题时十分复杂,本文是在总结线束工艺图的几何与拓扑性质的基础上,用虚框、虚点来描述电器件与电线信息,提升了模型的抽象层次,简化了其复杂程度。

In the program, the position of the free face is found by imaginary point method and reasonable results are obained.

针对水工建筑物裂隙岩基渗流场计算,采用双重介质解法编制了三维有限元裂隙渗流计算程序,用水量交换项耦合主干裂隙网络及裂隙岩块,自由面位置的确定使用自由面虚点法迭代逼近,得到了合理的计算结果。