写出lingo求解代码
时间: 2024-09-25 20:04:43 浏览: 24
基于提供的文档信息来设计一个Lingo模型以解决上述生产的规划问题可能如下形式:
```
model:
sets:
Weeks /1..17/; /*定义周次集*/
production(weeks); /*第w周生产产品的数量*/
arrival(weeks); /*第w周到货的产品数量*/
available(weeks); /*第w周分销点可用产品数量*/
orderd(weeks); /*第w周的客户订单数量*/
dispatched_orders(weeks); /*第w周应发订单数量*/
actual_delivery(weeks); /*第w周实际发货数量*/
inventory(weeks); /*第w周分销点库存数量*/
shortage(weeks); /*第w周分销点产品缺货数量*/
forecasted_order(weeks);/*预测第w周分销点订单数量*/
endsets
/*目标函数 - 最小化成本*/
min = @sum(weeks(i): 2*inventory(i) + 3*shortage(i));
/*生产运输约束*/
forall (weeks(i)| i>1 ) : arrival(i) = production(i-1);
/*可用数量约束*/
forall (weeks(i)): available(i) = inventory(i-1) + arrival(i) - actual_delivery(i);
/*应发数量约束*/
forall (weeks(i)): dispatched_orders(i) <= available(i);
/*实际发货量不能超过需求量*/
forall (weeks(i)): actual_delivery(i) <= orderd(i);
/*库存数量更新*/
forall (weeks(i)): inventory(i) = available(i) - (orderd(i)-shortage(i));
/*客户订单等于预测订单数*/
forall (weeks(i)| i>=10 and i<=26 ): orderd(i)=forecasted_order(i);
initial inventory;
data:
/*初始化库存 */
inventory(1) = initial_inventory;
/*预测的需求 */
forecasted_order::15,16,17,18,19,20,21,22,23,24,25,26;
enddata
```
请注意,以上LINGO模型是一种简化示例,并且某些细节如initial_inventory初始库存数值、预测需求的具体数字等需根据实际情况填写。同时,由于未提供具体的历史订单数据和其他相关数据,因此`forecasted_order`的数组是随意设定的。在实际应用时,请替换为您自己的数据。
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