请各位可否帮我看以下的题目,我建立的模式有没有错好吗?谢谢 1. Alumco manufactures aluminum sheets and aluminum bars. The maximum production capacity is estimated at either 800 sheets or 600 bars per day. The maximum daily demand is 550 sheets and 580 bars. The profit per ton is $40 per sheet and $35 per bar. Determine the optimal production mix. 以下是我建立的模式,但这题我不太会建立 Defined X : Tons produced daily of aluminum sheets. Y : Tons produced daily of aluminum bars. Let Maximize z = 40X + 35Y Subject to X ≦ 800 ? X ≦ 550 ? Y ≦ 600 ? Y ≦ 580 ? 这里我不确定 X,Y ≧ 0 2. The Continuing Education Division at the Ozark Community College offers a total of 30 courses each semester. The courses offered are usually of two types: practical, such as woodworking, word processing. and car maintenance; and humanistic, such as history, music, and fine arts. To satisfy the demand of the community, at least 10 courses of each type must be offered each semester. The division estimates that the revenues of offering practical and humanistic courses are approximately $1500 and $1000 per course, respectively. Please devise an optimal course offering for the college. 以下是我建立的模式,请各位帮我看看有没有错误 Defined X : The number of course about practical. Y : The number of course about humanistic. Let Maximize z = 1500X + 1000Y S.T. X+Y ≦ 30 10 ≦ X ≦ 30 10 ≦ Y ≦ 30 --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 61.216.14.249