建立以年总费用为目标函数的逆流喷雾干燥优化设计数学模型。
The optimum design model of countercurrent spray dryer is established with the annual total cost as the objective function.
分析了影响年总费用的因素，编制了管壳式换热器优化设计计算机程序。
Factors causing the total fee of shell and tube heat exchangers are analyzed, and a program for optimum design of shell and tube heat exchanger is worked out.
并且通过数值研究分析了信用期限的改变以及考虑报废成本对企业最优订购策略和年总费用的影响。
Also, the effect of credit period length and obsolescence risk on the firm's optimal strategy and annual total cost is examined.
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