如何用lingo求解下面的问题呢?一个变量取多个值(或者数组)最优化问题描述如下min=m/n;m=2*d*(g*(b*c-a)+c*(h*h+2*f)+a);n=a*(b*c-a)-s*c*c;s=p*p;a=2*d*p*p+2*e*p;b=1+(1+u)*p*p+4*d*e*p;c=2*d+2*(1+u)*e*p;f=-(1+u)*p*p;g=(1+u)*(1+u)
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![如何用lingo求解下面的问题呢?一个变量取多个值(或者数组)最优化问题描述如下min=m/n;m=2*d*(g*(b*c-a)+c*(h*h+2*f)+a);n=a*(b*c-a)-s*c*c;s=p*p;a=2*d*p*p+2*e*p;b=1+(1+u)*p*p+4*d*e*p;c=2*d+2*(1+u)*e*p;f=-(1+u)*p*p;g=(1+u)*(1+u)](/uploads/image/z/6437761-25-1.jpg?t=%E5%A6%82%E4%BD%95%E7%94%A8lingo%E6%B1%82%E8%A7%A3%E4%B8%8B%E9%9D%A2%E7%9A%84%E9%97%AE%E9%A2%98%E5%91%A2%3F%E4%B8%80%E4%B8%AA%E5%8F%98%E9%87%8F%E5%8F%96%E5%A4%9A%E4%B8%AA%E5%80%BC%28%E6%88%96%E8%80%85%E6%95%B0%E7%BB%84%29%E6%9C%80%E4%BC%98%E5%8C%96%E9%97%AE%E9%A2%98%E6%8F%8F%E8%BF%B0%E5%A6%82%E4%B8%8Bmin%3Dm%2Fn%3Bm%3D2%2Ad%2A%28g%2A%28b%2Ac-a%29%2Bc%2A%28h%2Ah%2B2%2Af%29%2Ba%29%3Bn%3Da%2A%28b%2Ac-a%29-s%2Ac%2Ac%3Bs%3Dp%2Ap%3Ba%3D2%2Ad%2Ap%2Ap%2B2%2Ae%2Ap%3Bb%3D1%2B%281%2Bu%29%2Ap%2Ap%2B4%2Ad%2Ae%2Ap%3Bc%3D2%2Ad%2B2%2A%281%2Bu%29%2Ae%2Ap%3Bf%3D-%281%2Bu%29%2Ap%2Ap%3Bg%3D%281%2Bu%29%2A%281%2Bu%29)
如何用lingo求解下面的问题呢?一个变量取多个值(或者数组)最优化问题描述如下min=m/n;m=2*d*(g*(b*c-a)+c*(h*h+2*f)+a);n=a*(b*c-a)-s*c*c;s=p*p;a=2*d*p*p+2*e*p;b=1+(1+u)*p*p+4*d*e*p;c=2*d+2*(1+u)*e*p;f=-(1+u)*p*p;g=(1+u)*(1+u)
如何用lingo求解下面的问题呢?一个变量取多个值(或者数组)
最优化问题描述如下
min=m/n;
m=2*d*(g*(b*c-a)+c*(h*h+2*f)+a);
n=a*(b*c-a)-s*c*c;
s=p*p;
a=2*d*p*p+2*e*p;
b=1+(1+u)*p*p+4*d*e*p;
c=2*d+2*(1+u)*e*p;
f=-(1+u)*p*p;
g=(1+u)*(1+u)*p*p;
h=2*(1+u)*e*p;
@free(f);
d=0.05;
e=0.5;
可是最后一行的变量e需要很多值,比如
e=0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8九个数值时,都需要求解出其对应的最优值
以及此时各个变量的值,
如果e有很多个值的话,对e一个一个赋值的话,是很慢的事,
我想差不多应该用submodel求解,但是我又不会,
如何用lingo求解下面的问题呢?一个变量取多个值(或者数组)最优化问题描述如下min=m/n;m=2*d*(g*(b*c-a)+c*(h*h+2*f)+a);n=a*(b*c-a)-s*c*c;s=p*p;a=2*d*p*p+2*e*p;b=1+(1+u)*p*p+4*d*e*p;c=2*d+2*(1+u)*e*p;f=-(1+u)*p*p;g=(1+u)*(1+u)
MODEL:
SUBMODEL OBJ:
min=m/n;
ENDSUBMODEL
SUBMODEL CON:
m=2*d*(g*(b*c-a)+c*(h*h+2*f)+a);
n=a*(b*c-a)-s*c*c;
s=p*p;
a=2*d*p*p+2*e*p;
b=1+(1+u)*p*p+4*d*e*p;
c=2*d+2*(1+u)*e*p;
f=-(1+u)*p*p;
g=(1+u)*(1+u)*p*p;
h=2*(1+u)*e*p;
@free(f);
d=0.05;
ENDSUBMODEL
SUBMODEL CON1:
e=0;
ENDSUBMODEL
SUBMODEL CON2:
e=0.1;
ENDSUBMODEL
SUBMODEL CON3:
e=0.2;
ENDSUBMODEL
SUBMODEL CON4:
e=0.3;
ENDSUBMODEL
SUBMODEL CON5:
e=0.4;
ENDSUBMODEL
SUBMODEL CON6:
e=0.5;
ENDSUBMODEL
SUBMODEL CON7:
e=0.6;
ENDSUBMODEL
SUBMODEL CON8:
e=0.7;
ENDSUBMODEL
SUBMODEL CON9:
e=0.8;
ENDSUBMODEL
CALC:
@write('e=0的', @newline(1));
@solve(OBJ,CON,CON1);
@write('e=0.1的', @newline(1));
@solve(OBJ,CON,CON2);
@write('e=0.2的', @newline(1));
@solve(OBJ,CON,CON3);
@write('e=0.3的', @newline(1));
@solve(OBJ,CON,CON4);
@write('e=0.4的', @newline(1));
@solve(OBJ,CON,CON5);
@write('e=0.5的', @newline(1));
@solve(OBJ,CON,CON6);
@write('e=0.6的', @newline(1));
@solve(OBJ,CON,CON7);
@write('e=0.7的', @newline(1));
@solve(OBJ,CON,CON8);
@write('e=0.8的', @newline(1));
@solve(OBJ,CON,CON9);
ENDCALC
END