其中各阶段产品产量为决策变量，各阶段库存为状态变量。
The decision variables are the production of the refinery product in multistage and the state variables are inventory.
以回流比、回收率为决策变量，总费用最小为目标函数，编制计算机程序进行优化计算。
Using reflux ratio and recovery as decision variables and total cost as objective function, the computer programs were programmed and optimized calculation was carried out.
以博弈论为研究工具，以供应量和价格为决策变量，通过两阶段动态博弈模型，对能源之间的替代问题进行了研究。
With the help of game theory, and the use of supply and price as variable of policy decision, the paper studies the energy substitution issue by a two-stage dynamic game model.
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