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中文摘要：
对强迫冷却过程冷却流体质量最小化进行重新分析。指出并分析已有文献中建立的强迫冷却过程模型存在的一些问题，建立了精确的模型，给出了冷却流体质量最小最优控制问题表述。由于基于精确模型的最优控制问题求解困难，所以简化并建立了一个近似模型，利用最优控制理论得到冷却流体质量最小时的强迫冷却过程最优构型，并与原有模型下的最优构型进行了比较。
英文摘要：
The analysis of forced cool-down processes for minimizing cooling fluid mass is repeated. The mistakes of the original model of the processes established in previous literatures are indicated and analyzed. An exact model of the processes is established, and the optimal control problem for minimizing cooling fluid mass is described. Because the optimal control problem based on the exact model is difficult to be solved, the problem is simplified and an approximate model of the processes is established. Optimal control theory is applied to obtain the optimal configuration of the processes for minimizing cooling fluid mass, and the obtained results are compared with those based on the original model.
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