Linear Programming (LP) has been used for many years to determine the least-cost ration.

线性规划(LP)用于确定饲料最低费用配比已有多年的历史。

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It contains output ration, manhour ration, raw and auxiliary materials and energy sources consumption ration and cost ration.

生产过程中的定额管理是企业的重要基础管理工作之一，它包括产量定额、工时定额、原辅材料和能源消耗定额及费用定额。

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Because of several reasons, the logistics cost of our country keeps high, which lowers the logistics project repay ration and the industries' competitive power.

由于诸多方面的原因，我国的物流成本居高不下，降低物流项目的回报率，降低物流企业的竞争力。

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But the focus is now on smart cards, which would ration subsidised petrol to a few litres a week, with excess consumption being paid for at the cost of imports.

ECONOMIST: Oil-rich Iran may have to ration petrol