This paper presents two methods of optimal levelling network design based on criterion matrix and linear programming of required precision.

本文介绍了根据准则矩阵和根据所需精度要求的线性规划法水准网优化设计的两种方法。

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Theories and methods of system engineering are adopted in this paper to study the problem of optimal programming of regional water conservation and find out an optimal programming scheme.

本文运用系统工程的理论和方法，研究区域节水最优规划问题，以寻求区域最佳节水规划方案。

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Of the problems of optimal control, the most important two optimization methods are Pontryagin minimum(or called maximum) principle and Bellman dynamic programming.

在最优控制中，最重要的两种优化方法是庞特里亚金最小值（或称最大值） 原理和贝尔曼动态规划法。

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