数学建模社区-数学中国
标题:
matlab优化问题
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作者:
simonsnow
时间:
2015-7-23 20:43
标题:
matlab优化问题
本帖最后由 simonsnow 于 2015-7-23 22:28 编辑
这个问题用matlab怎么解啊,大神路过麻烦帮下忙,提供一下思路也好,谢谢啦
2015-7-23 20:43 上传
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作者:
shengshengchina
时间:
2015-7-23 20:43
再发一遍
lingo程序:
sets:
a/1..4/:x,c;
aa(a,a): Q;
endsets
data:
c=6 8 4 2;
Q=-1 2 0 0
2 -1 2 0
0 2 -1 2
0 0 2 -1;
enddata
max=@sum(a:c*x)+1/2*@sum(a(j):x(j)*@sum(a(i):x(i)*Q(i,j)));
x(1)*x(2)+x(3)*x(4)>-1;
x(1)*x(2)+x(3)*x(4)<1;
@sum(a:x)>-3;
@sum(a:x)<2;
@for(a : @free(x);@bnd(-1,x,1));
结果:
Global optimal solution found.
Objective value: 16.33333
Objective bound: 16.33334
Infeasibilities: 0.000000
Extended solver steps: 11
Total solver iterations: 706
Variable Value Reduced Cost
X( 1) 1.000000 -3.000000
X( 2) 1.000000 -6.333333
X( 3) 0.6666667 0.000000
X( 4) -0.6666667 0.000000
作者:
shengshengchina
时间:
2015-7-24 16:34
lingo程序:
sets:
a/1..4/:x,c;
aa(a,a)
;
endsets
data:
c=6 8 4 2;
Q=-1 2 0 0
2 -1 2 0
0 2 -1 2
0 0 2 -1;
enddata
max=@sum(a:c*x)+1/2*@sum(a(j):x(j)*@sum(a(i):x(i)*Q(i,j)));
x(1)*x(2)+x(3)*x(4)>-1;
x(1)*x(2)+x(3)*x(4)<1;
@sum(a:x)>-3;
@sum(a:x)<2;
@for(a
free(x);@bnd(-1,x,1));
结果:
Global optimal solution found.
Objective value: 16.33333
Objective bound: 16.33334
Infeasibilities: 0.000000
Extended solver steps: 11
Total solver iterations: 706
Variable Value Reduced Cost
X( 1) 1.000000 -3.000000
X( 2) 1.000000 -6.333333
X( 3) 0.6666667 0.000000
X( 4) -0.6666667 0.000000
作者:
simonsnow
时间:
2015-7-25 11:05
shengshengchina 发表于 2015-7-24 16:37
再发一遍
lingo程序:
x1-x4只能是-1或1,下面有条件限制。。。而且我用lingo解出来了,值是16,不知道怎么用matlab来解,不过还是谢谢你,先给你采纳了,你会用matlab解吗
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