作业帮 > 综合 > 作业

求数学建模高手——线性规划题,如何用MATLAB编程?紧急!

来源:学生作业帮 编辑:拍题作业网作业帮 分类:综合作业 时间:2024/04/28 23:04:40
求数学建模高手——线性规划题,如何用MATLAB编程?紧急!
max=1.15*x4A+1.40*x2C+1.25*x3B+1.06*x5D;
x1A+x1D=100000;
-1.06*x1D+x2A+x2C+x2D=0;
-1.15*x1A+x3A+x3B-1.06*x2D+x3D=0;
-1.15*x2A+x4A-1.06*x3D+x4D=0;
-1.15*x3A-1.06*x4D+x5D=0;
x2C
您的变量应该只有11个,不是20个,下面是我的编程,您看一下:
c=[0 0 0 -1.15 -1.25 -1.40 0 0 0 0 -1.06 ];
>> A=[0,0,0,0,0,1,0,0,0,0,0;0,0,0,0,1,0,0,0,0,0,0];
>> b=[30000;40000];
>> Aeq=[1,0,0,0,0,0,1,0,0,0,0;0,1,0,0,0,1,-1.06,1,0,0,0;-1.15,0,1,0,1,0,0,-1.06,1,0,0;0,-1.15,0,1,0,0,0,0,-1.06,1,0;0,0,-1.05,0,0,0,0,0,0,-1.06,1];
beq=[100000,0,0,0,0];
>> VLB=[0,0,0,0,0,0,0,0,0,0,0];
>> VUB=[];
>> [x,fval]=linprog(c,A,b,Aeq,beq,VLB,VUB)
Optimization terminated successfully.
x =
1.0e+004 *
5.7513
1.5036
0.0000
4.5000
4.0000
3.0000
4.2487
0.0000
2.6140
0.0000
0.0000
fval =
-1.4375e+005
>> 由于是用的求最小,而您的题目是求最大,所以我把您的目标函数的系数都改为了负值,这样只须将最后的函数值前加一个负号就行,即fval=1.4375e+005