函数索引的存储和维护成本较高。
The cost for storage and maintenance of a functional index can be high.
单位生产成本是生产率的函数。
发电商的发电成本可以通过发电量的二次函数来表示。
The generation cost can be represented by quadratic function of generated energy.
目标函数是光学系统的最低制造成本。
The objective function, is the minimum fabrication cost of the optical system.
一个困难可以找到最佳的成本函数。
然后将相关数据及资料整理为成本函数数据库。
And all the estimated data are collected in cost function database.
进化将成本函数和优化算法分开了吗？
Did Evolution Separate Cost Functions from Optimization Algorithms?
考虑到丢单成本这一因素，给出了相应的总成本函数，并对其进行了分析。
Accounting for the lost sale cost, the corresponding total cost function is given and analyzed.
产出越大，平均成本越低；当平均成本是产出递减函数时，边际成本总是低于平均成本。
When average costs decline in output, marginal cost is always less than average cost.
产出越大，平均成本越低；当平均成本是产出递减函数时，边际成本总是低于平均成本。
When average costs decline in output, marginal cost is always less than average cost.
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