Themethod, which is based on the Lagrange Multipliers Method, is normalized inorder that the results can be applied to the liquefiers with varied efficiencyand the varisized dewars.

• 采用的优化方法是拉格朗日乘数法。并进行了归一化处理使得出的结果能适用于不同效率的液氮机和液氦机以及不同大小的杜瓦。