To reduce energy consumption of oilfield water flooding system, the optimum control of energy saving of the water flooding system need to be carried out.

为有效地减小油田注水系统无用功能耗，需对注水系统实行节能优化控制。

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To make quenching and control cooling equipment of plate achieve optimum cooling performance, it is necessary to ensure the impinging jet able to penetrate through the water layer deposited on plate.

要使中厚板淬火控冷装置获得最佳的冷却能力，必须要保证冲击射流可以穿透钢板表面的滞留水层。

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We also give the approximate algorithm of dispersed optimum control model, and compute the numerical value of our country's h-l water injection developing oilfield as an example.

同时还给出了离散最优控制的近似算法，并以国内H—L注水开发油田为实例进行了试算。

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