A three-legged ejector sleeve is adopted in the die casting mould to take cast stripping mould, the problem that the cast difficultly demould is solved.

采用三脚管件，解决了轴套件脱模难的问题。

In the process of problem solving, we adopt the concept of DOS to assess the network survivability and use the Lagrangean Relaxation method and the subgradient method to approach the optimal solution.

在求解的过程之，利用“拉格兰日松弛法”与“梯度法”来帮助我们逐渐找解。