这本书使用运筹成本函数与连续近似方法来规划运筹系统的方式，可谓独特且有趣。
This is a unique and interesting way of looking at the planning of logistics systems using logistics Cost Functions and continuous approximation methods.
当收入函数、成本函数为连续可微函数，边际收入等于边际成本，即边际利润等于零时，利润最大；但在离散情况下，上述结论不一定成立，并给出反例。
In this paper I get the profit be maximum, as the revenue function, cost function are continuous differential and the margin revenue equals margin cost, that marginal profit equals zero.
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