论文部分内容阅读
例1设工厂A到铁路线的垂直距离为20km,垂足为B.铁路线上距离B100km处有一个原料供应站C,现要在铁路B、C之间某处D修建一个原料中转站,再由车站D向工厂修一条公路.如果已知每千米的铁路运费与公路运费之比为3:5,那么D应选在何处,才能使原料供应站C运货到工厂A所需的运费最省?
Example 1 Suppose that the vertical distance from factory A to the railway line is 20km and the foot drop is B. There is a raw material supply station C at a distance of 100km from the railway line and a material transfer station should be constructed at a place D between the railway lines B and C, Then repair a road to the factory by station D. If we know that the ratio of rail freight to road freight per kilometer is 3: 5, then where should D be chosen to deliver the raw material supply station C to factory A The most shipping costs?