The mathematic problem solving teaching in American is built on the basic of four stages of G.
美国的数学问题解决教学是建立在波利亚问题解决四阶段基础上；
This paper established the mathematic model and solving flow of multi-restriction vehicle routing problem.
建立了多约束条件车辆路径问题的数学模型和求解流程。
The principle of the measurement and image reconstruction methods are introduced. GVSPM, an alternative mathematic algorithm, can be used in solving ECT's inverse problem.
文中介绍了其测量原理和一些重构图象的算法，并引入广义矢量模式匹配法（GVSPM）和改进的伪逆法求解ECT逆问题。
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