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标题: 无语了 20个小时了又出问题了强人来帮我看看啊！！！ [打印本页]

作者: heavenalan 时间: 2010-5-12 21:16
设置改成全局最优解后结果如下：
Global optimal solution found.
  Objective value:                            0.000000
  Objective bound:                            0.000000
  Infeasibilities:                            0.000000
  Extended solver steps:                            0
  Total solver iterations:                         28

                     Variable          Value       Reduced Cost
                           B       0.000000          0.000000
                           X1       1.234568          0.000000

作者: 安树庭 时间: 2010-5-12 21:21
你太强了！！！！！！！！！！！！！！！！！！！！！服了楼主

作者: 咫尺天涯 时间: 2010-5-12 21:22
ding !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

作者: heavenalan 时间: 2010-5-12 21:46
晓得哪出毛病了
x2=@if(x1#ge#a021,x1-a021,x1);y4=@if(x1#ge#a021,a021,0);b1=@if(x1#ge#a021,b021,0);
x2=@if(x1#ge#a022,x1-a022,x1);y4=@if(x1#ge#a022,a022,0);b2=@if(x1#ge#a022,b022,0);
x2=@if(x1#ge#a023,x1-a023,x1);y4=@if(x1#ge#a023,a023,0);b3=@if(x1#ge#a023,b023,0);
x2=@if(x1#ge#a021+a022,x1-a021-a022,x1);y4=@if(x1#ge#a021+a022,a021+a022,0);b4=@if(x1#ge#a021+a022,b021+b022,0);
x2=@if(x1#ge#a021+a022+a023,x1-a021-a022-a023,x1);y4=@if(x1#ge#a021+a022+a023,a021+a022+a023,0);b5=@if(x1#ge#a021+a022+a023,b021+b022+b023,0);
我是想做分段函数那种咋做啊
就是x1<a021,a021<x1<a022,a022<x1<a023....................

作者: olh2008 时间: 2010-5-12 22:00
如果是分段函数并且分支较多，可用@if的嵌套形式，举一个例子，比如绝对值函数就是一个典型的分段函数。可以表示为：
a=@if(x>0,x,@if(x<0,-x,0));
如果条件不止一个，可以用#and# #or#等串接

作者: liupeng723911 时间: 2010-5-13 00:34
ding!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

作者: heavenalan 时间: 2010-5-13 00:55
终于做出来了，谢谢各位的帮忙，今天做了11个小时！！！
跟各位分享下
model:
max=b/x1;!目标函数;
x1>1;
x1<914.734103;!约束条件;
b=b2+b3+b5+b7+b9+b12+b14+b17+b19;!以下为主程序部分;
x2=@if(x1#ge#a021+a022+a023,x1-a021-a022-a023,@if(x1#ge#a021+a022,x1-a021-a022,@if(x1#ge#a023,x1-a023,@if(x1#ge#a022,x1-a022,@if(x1#ge#a021,x1-a021,x1)))));
y4=@if(x1#ge#a021+a022+a023,a021+a022+a023,@if(x1#ge#a021+a022,a021+a022,@if(x1#ge#a023,a023,@if(x1#ge#a022,a022,@if(x1#ge#a021,a021,0)))));
b2=@if(x1#ge#a021+a022+a023,b021+b022+b023,@if(x1#ge#a021+a022,b021+b022,@if(x1#ge#a023,b023,@if(x1#ge#a022,b022,@if(x1#ge#a021,b021,0)))));
x3=@if(x2#ge#a031+a032+a033,x2-a031-a032-a033,@if(x2#ge#a031+a032,x2-a031-a032,@if(x2#ge#a033,x2-a033,@if(x2#ge#a032,x2-a032,@if(x2#ge#a031,x2-a031,x2)))));
y5=@if(x2#ge#a031+a032+a033,a031+a032+a033,@if(x2#ge#a031+a032,a031+a032,@if(x2#ge#a033,a033,@if(x2#ge#a032,a032,@if(x2#ge#a031,a031,0)))));
b3=@if(x2#ge#a031+a032+a033,b031+b032+b033,@if(x2#ge#a031+a032,b031+b032,@if(x2#ge#a033,b033,@if(x2#ge#a032,b032,@if(x2#ge#a031,b031,0)))));
x4=x3+y4;
x5=@if(x4#ge#a051+a052+a053+a054+a055+ao56+a057+ao58,x4-a051-a052-a053-a054-a055-a056-a057-a058,@if(x4#ge#a051+a052+a053+a054+a055+ao56+a057,x4-a051-a052-a053-a054-a055-a056-a057,@if(x4#ge#a051+a052+a053+a054+a055+ao56,x4-a051-a052-
a053-a054-a055-a056,@if(x4#ge#a051+a052+a053+a054+a055,x4-a051-a052-a053-a054-a055,@if(x4#ge#a051+a052+a053+a054,x4-a051-a052-a053-a054,@if(x4#ge#a051+a052+a053,x4-a051-a052-a053,@if(x4#ge#a051+a052,x4-a051-a052,@if(x4#ge#a058,x4-a058,
@if(x4#ge#a057,x4-a057,@if(x4#ge#a056,x4-a056,@if(x4#ge#a055,x4-a055,@if(x4#ge#a054,x4-a054,@if(x4#ge#a053,x4-a053,@if(x4#ge#a052,x4-a052,@if(x4#ge#a051,x4-a051,x4)))))))))))))));
y7=@if(x4#ge#a051+a052+a053+a054+a055+ao56+a057+ao58,a051+a052+a053+a054+a055+ao56+a057+ao58,@if(x4#ge#a051+a052+a053+a054+a055+ao56+a057,a051+a052+a053+a054+a055+ao56+a057,@if(x4#ge#a051+a052+a053+a054+a055+ao56,a051+a052+a053+a054+a055+ao56,
@if(x4#ge#a051+a052+a053+a054+a055,a051+a052+a053+a054+a055,@if(x4#ge#a051+a052+a053+a054,a051+a052+a053+a054,@if(x4#ge#a051+a052+a053,a051+a052+a053,@if(x4#ge#a051+a052,a051+a052,@if(x4#ge#a058,a058,@if(x4#ge#a057,a057,@if(x4#ge#a056,a056,
@if(x4#ge#a055,a055,@if(x4#ge#a054,a054,@if(x4#ge#a053,a053,@if(x4#ge#a052,a052,@if(x4#ge#a051,a051,0)))))))))))))));
b5=@if(x4#ge#a051+a052+a053+a054+a055+ao56+a057+ao58,b051+b052+b053+b054+b055+bo56+b057+bo58,@if(x4#ge#a051+a052+a053+a054+a055+ao56+a057,b051+b052+b053+b054+b055+bo56+b057,@if(x4#ge#a051+a052+a053+a054+a055+ao56,b051+b052+b053+b054+b055+bo56,
@if(x4#ge#a051+a052+a053+a054+a055,b051+b052+b053+b054+b055,@if(x4#ge#a051+a052+a053+a054,b051+b052+b053+b054,@if(x4#ge#a051+a052+a053,b051+b052+b053,@if(x4#ge#a051+a052,b051+b052,@if(x4#ge#a058,bo58,@if(x4#ge#a057,b057,@if(x4#ge#a056,bo56,
@if(x4#ge#a055,b055,@if(x4#ge#a054,b054,@if(x4#ge#a053,b053,@if(x4#ge#a052,b052,@if(x4#ge#a051,b051,0)))))))))))))));
x6=x5;
x7=@if(x6#ge#a071+a072+a073+a074,x6-a071-a072-a073-a074,@if(x6#ge#a071+a072+a073,x6-a071-a072-a073,@if(x6#ge#a071+a072,x6-a071-a072,@if(x6#ge#a074,x6-a074,@if(x6#ge#a073,x6-a073,@if(x6#ge#a072,x6-a072,@if(x6#ge#a071,x6-a071,x6)))))));
y9=@if(x6#ge#a071+a072+a073+a074,a071+a072+a073+a074,@if(x6#ge#a071+a072+a073,a071+a072+a073,@if(x6#ge#a071+a072,a071+a072,@if(x6#ge#a074,a074,@if(x6#ge#a073,a073,@if(x6#ge#a072,a072,@if(x6#ge#a071,a071,x6)))))));
b7=@if(x6#ge#a071+a072+a073+a074,b071+b072+b073+b074,@if(x6#ge#a071+a072+a073,b071+b072+b073,@if(x6#ge#a071+a072,b071+b072,@if(x6#ge#a074,b074,@if(x6#ge#a073,b073,@if(x6#ge#a072,b072,@if(x6#ge#a071,b071,x6)))))));
x8=x7;
x9=@if(x8#ge#a091+a092+a093,x8-a091-a092-a093,@if(x8#ge#a091+a092,x8-a091-a092,@if(x8#ge#a093,x8-a093,@if(x8#ge#a092,x8-a092,@if(x8#ge#a091,x8-a091,x8)))));
y11=@if(x8#ge#a091+a092+a093,a091+a092+a093,@if(x8#ge#a091+a092,a091+a092,@if(x8#ge#a093,a093,@if(x8#ge#a092,a092,@if(x8#ge#a091,a091,0)))));
b9=@if(x8#ge#a091+a092+a093,b091+b092+b093,@if(x8#ge#a091+a092,b091+b092,@if(x8#ge#a093,b093,@if(x8#ge#a092,b092,@if(x8#ge#a091,b091,0)))));
x10=x9;
x11=x10+y11;
x12=@if(x11#ge#a0121+a0122+a0123,x11-a0121-a0122-a0123,@if(x11#ge#a0121+a0122,x11-a0121-a0122,@if(x11#ge#a0123,x11-a0123,@if(x11#ge#a0122,x11-a0122,@if(x11#ge#a0121,x11-a0121,x11)))));
y14=@if(x11#ge#a0121+a0122+a0123,a0121+a0122+a0123,@if(x11#ge#a0121+a0122,a0121+a0122,@if(x11#ge#a0123,a0123,@if(x11#ge#a0122,a0122,@if(x11#ge#a0121,a0121,0)))));
b12=@if(x11#ge#a0121+a0122+a0123,b0121+b0122+b0123,@if(x11#ge#a0121+a0122,b0121+b0122,@if(x11#ge#a0123,b0123,@if(x11#ge#a0122,b0122,@if(x11#ge#a0121,b0121,0)))));
x13=@if(x12#ge#a0131,x12-a0131,x12);y15=@if(x12#ge#a0131,a0131,0);b43=@if(x12#ge#a0131,b0131,0);
x14=@if(x13#ge#a0141+a0142+a0143,x13-a0141-a0142-a0143,@if(x13#ge#a0141+a0142,x13-a0141-a0142,@if(x13#ge#a0143,x13-a0143,@if(x13#ge#a0142,x13-a0142,@if(x13#ge#a0141,x13-a0141,x13)))));
y16=@if(x13#ge#a0141+a0142+a0143,a0141+a0142+a0143,@if(x13#ge#a0141+a0142,a0141+a0142,@if(x13#ge#a0143,a0143,@if(x13#ge#a0142,a0142,@if(x13#ge#a0141,a0141,0)))));
b14=@if(x13#ge#a0141+a0142+a0143,b0141+b0142+b0143,@if(x13#ge#a0141+a0142,b0141+b0142,@if(x13#ge#a0143,b0143,@if(x13#ge#a0142,b0142,@if(x13#ge#a0141,b0141,0)))));
x15=x14+y15;
x16=@if(x15#ge#a0161,x15-a0161+y16,x15+y16);y18=@if(x15#ge#a0161,a0161,0);b49=@if(x15#ge#a0161,b0161,0);
x17=@if(x16#ge#a0171+a0172+a0173,x16-a0171-a0172-a0173,@if(x16#ge#a0171+a0172,x16-a0171-a0172,@if(x16#ge#a0173,x16-a0173,@if(x16#ge#a0172,x16-a0172,@if(x16#ge#a0171,x16-a0171,x16)))));
y19=@if(x16#ge#a0171+a0172+a0173,a0171+a0172+a0173,@if(x16#ge#a0171+a0172,a0171+a0172,@if(x16#ge#a0173,a0173,@if(x16#ge#a0172,a0172,@if(x16#ge#a0171,a0171,0)))));
b17=@if(x16#ge#a0171+a0172+a0173,b0171+b0172+b0173,@if(x16#ge#a0171+a0172,b0171+b0172,@if(x16#ge#a0173,b0173,@if(x16#ge#a0172,b0172,@if(x16#ge#a0171,b0171,0)))));
x18=x17+y18;
x19=@if(x18#ge#a0191+a0192+a0193,x18-a0191-a0192-a0193,@if(x18#ge#a0191+a0192,x18-a0191-a0192,@if(x18#ge#a0193,x18-a0193,@if(x18#ge#a0192,x18-a0192,@if(x18#ge#a0191,x18-a0191,x18)))));
y21=@if(x18#ge#a0191+a0192+a0193,a0191+a0192+a0193,@if(x18#ge#a0191+a0192,a0191+a0192,@if(x18#ge#a0193,a0193,@if(x18#ge#a0192,a0192,@if(x18#ge#a0191,a0191,0)))));
b19=@if(x18#ge#a0191+a0192+a0193,b0191+b0192+b0193,@if(x18#ge#a0191+a0192,b0191+b0192,@if(x18#ge#a0193,b0193,@if(x18#ge#a0192,b0192,@if(x18#ge#a0191,b0191,0)))));
data:
a021=42.39;a022=48;a023=215.84;a031=33;a032=74.4;a033=94.4;a051=30.7;a052=35.2;a053=43.47;a054=43.98;a055=49.56;a056=60;a057=81.98;a058=96.8;a071=34.5;a072=42.5;a073=57.6;a074=191.84;
a091=62;a092=96;a093=112;a0121=39.8;a0122=45;a0123=66;a0131=616.2;a0141=31.68;a0142=48;a0143=65.94;a0161=170;a0171=48;a0172=67;a0173=119;a0191=54.75;a0192=58;a0193=22.81;!参数a取值;
b021=0.0559749488117002;b022=0.0824448;b023=0.2726648;b031=0.2160324;b032=0.2958816;b033=0.35346;b051=0.065968;b052=0.04201472;b053=0.0530712;b054=0.05967;b055=0.0645216;b056=0.06256;
b057=0.156698914285714;b058=0.4349048;b071=0.0500511;b072=0.08024357;b073=0.33550848;b074=0.428624;b091=0.0597494;b092=0.0386808;b093=0.07289464;b0121=0.012567;b0122=0.028356;
b0123=0.0464912;b0131=2.3189166;b0141=0.04134672;b0142=0.10455;b0143=0.0110553;b0161=0.01818;b0171=0.00274244999999999;b0172=0.00334879999999997;b0173=0.1154736;b0191=0.00558180000000002;
b0192=0.000996800000000004;b0193=0.0237764188158962;!参数b取值;
enddata
end

作者: bingcheers 时间: 2010-5-13 07:54
btbtbtbtbtbtbtbtbbttttttttttttttttttttttttttttttttttttt

数学中国社区 » LINDO\LINGO » 已经解决了，分段函数。。。。，11个小时的成果跟大家分享下！！！

作者: 可叹烟雨 时间: 2010-5-21 18:45
楼主，你太强了，编了那么多的程序，你是多久才达到这个水平的啊，我才刚懂了点基础~~~

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