Because of the complexity of the project optimization problem, the traditional optimization method can hardly be used to solve.

由于工程最优化问题的复杂性，传统的最优化方法一般很难求解。

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This text carries on the research to the system of GPRS and the application provide, discussing several kinds net project based on GPRS and the method dealing with the line problem.

本文对GPRS系统以及所提供的业务进行了研究，讨论了几种基于GPRS的组网方案以及解决掉线问题的方法。

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The calculating theory and designing method of pre-stress reinforcement concrete structure plasticity is one of thorny problem that the theory circle and project circle pays close attention to.

预应力混凝土结构塑性计算理论与设计方法是理论界和工程界十分关注且较为棘手的问题之一。

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