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这种问题在联合运输中经常遇到,目的在于选择不同运输工具使总运费最小,这是非常有用的。在求同类运输工具的最小运费时,也是有用的。现在看一个具体数字的运输问题。设某种物资产于甲_1,甲_2,甲_3三处,需要运送到乙_1,乙_2,乙_3,乙_4四处。三处产出的数量:甲_1为7吨,甲_2为4吨,甲_3为9吨。四处需要的数量:乙_1要3吨,乙_2要6吨,乙_3要5吨,乙_4要6吨。产地到销地的运费如下表所示。现问怎样调运才能使总的运费最小。
This problem is often encountered in joint transport, the purpose is to choose a different means of transport to minimize the total freight rate, which is very useful. It is also useful when seeking the lowest shipping cost for similar types of transport. Now look at a specific number of shipping issues. Let a kind of material assets in a _1, A _2, A _3 three, need to be shipped to B_1, B_2, B_3, B_4 four. Three output: A _1 is 7 tons, A_2 is 4 tons, A _3 is 9 tons. Around the required number: B 1 to 3 tons, B 2 to 6 tons, B 3 to 5 tons, B 4 to 6 tons. The shipping cost from the place of origin to the sale place is shown in the following table. Now how to transfer the total shipping costs can be minimized.