[商管] [OR]-運輸規劃問題
題目the company needs to make plans for the energy systems for a new building.
The energy needs in the building fall into three categories:(1)electricity
(2)heating water (3)heating space in the building.The daily requirements for
these three categories(all measured in the same units)are
Eletriciy 20units
Waer heating 10units
Space heating 30units
The three possible sources of energy to meet these needs are eletricity,
natural gas,and solar heating unit that can be installed on the roof.The size
of the largest possible solar heater to 30 units,but there is no limit to the
electricity and natural gas available.Electricity needs can be met only by
purchasing electricity at a cost of $50 per unit.Both other energy needs can
be met by source or combination of source.The unit costs are
electricity natural gas solar heating
Water heating $90 $60 $30
Space heating $80 $50 $40
The objective is to minimize the total cost of meeting the energy needs.
我解答至
ele wat spa 最低需求 最高需求
ele 50 90 80 20 M
gas M 60 50 0 M
solar M 30 40 30 30
total 20 10 30 60
但解答
ele wat spa 最低需求 最高需求
ele 50 90 80 20 60
gas M 60 50 0 40
solar M 30 40 30 30
total 20 10 30 60
想請問..解答的最高需求40和60是如何判斷的?
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10/08 14:17, , 1F
10/08 14:17, 1F