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wjxyszgrsgzr

Òø³æ (СÓÐÃûÆø)

[ÇóÖú] Çó½ÌÒ»¶ÎmatlabµÄ´úÂë ÒÑÓÐ1È˲ÎÓë

function f=myobj(x)
f=x(1)^2-x(2)^2;
function [c,ceq]=mycon1(x)
c(1)=(32/15)^2-x(1)^2-x(2)^2;
c(2)=480000/3.14-x(1)^3+(x(2)^4)/x(1);
ceq=[];
>> x0=[0;0];
>> A=[-1;1];
>> b=[£­3.5];
>> Aeq=[];
>> beq=[];
>> lb=[0,0];
>> ub=[];
>> [x,fval,exitflag,output]= fmincon (@myobj£¬x0, A,b,Aeq,beq,lb,ub, @mycon1)


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Cool_King

½ð³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by wjxyszgrsgzr at 2014-11-13 20:13:20
ÎÒ×Ô¼ººóÀ´½â¾öÁË,ÎÊÌâ²»ÊÇÔÚÄÇÀï,¶øÊÇÔÚÄǸöÄã×îºóÒªÉèÖÃÒ»ÏÂÓÅ»¯²ÎÊý,»¹ÓÐÄǸö×î³õµãx0µÄÑ¡Ôñ,×öÓÅ»¯µÄʱºòҪѡÔñ·ûºÏÔ¼ÊøÌõ¼þµÄµã,È»ºó»ù±¾ÉϾͿÉÒÔ³öÀ´ÁË,Õâ¸öº¯Êý»¹ÊǷdz£·½±ãµÄ,ʡϲ»ÉÙ¹¤×÷Á¿...

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4Â¥2014-11-13 21:34:46
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Cool_King

½ð³æ (СÓÐÃûÆø)

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feixiaolin: ½ð±Ò+2 2014-11-14 16:56:34
²»ÖªÂ¥Ö÷˵µÄû·¨Çó³öÓÅ»¯Öµ£¬ÊÇʲôÒâ˼¡£ÊDZ¨´í»¹ÊÇÔõô¡£
ÎÒÒ²ÊǸսӴ¥ÓÅ»¯£¬¾õµÃÂ¥Ö÷µÄ´íÎó¿ÉÄÜÊÇÔÚ£ºÖ÷º¯ÊýÀï A=[-1;1];µÄÀ¨ºÅÖмäÓ¦¸ÃÓöººÅ£¬¶ø²»ÊǷֺ𣼴¸ÄΪA=[-1,1];
ÎÒ¶ÔÄãµÄ³ÌÐò×öÁËÒ»µã¸Ä¶¯£¬ÈçÏ£º
function f=myobj(x)
f=x(1)^2-x(2)^2;

function [c,ceq]=mycon1(x)
c(1)=(32/15)^2-x(1)^2-x(2)^2;
c(2)=480000/3.14-x(1)^3+(x(2)^4)/x(1);
ceq=[];

x0=[0;0];
A=[-1,1];
b=-3.5;
lb=[0,0];
ub=[];
[x,fval,exitflag,output]= fmincon(@myobj,x0,A,b,[],[],lb,ub, @mycon1)

ÔËÐнá¹ûÈçÏ£¬ËäÈ»³öÁ˽á¹û£¬µ«ÎҸоõÂÔÆæ¹Ö£¬ÊDz»ÊÇÓÅ»¯½á¹ûȷʵÕâÑù£º
x =

     0
     0


fval =

     0


exitflag =

    -2


output =

         iterations: 1
          funcCount: 3
       lssteplength: 1
           stepsize: 0
          algorithm: 'medium-scale: SQP, Quasi-Newton, line-search'
      firstorderopt: []
    constrviolation: 4.5511
            message: [1x750 char]
2Â¥2014-11-13 11:09:31
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wjxyszgrsgzr

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by Cool_King at 2014-11-13 11:09:31
²»ÖªÂ¥Ö÷˵µÄû·¨Çó³öÓÅ»¯Öµ£¬ÊÇʲôÒâ˼¡£ÊDZ¨´í»¹ÊÇÔõô¡£
ÎÒÒ²ÊǸսӴ¥ÓÅ»¯£¬¾õµÃÂ¥Ö÷µÄ´íÎó¿ÉÄÜÊÇÔÚ£ºÖ÷º¯ÊýÀï A=;µÄÀ¨ºÅÖмäÓ¦¸ÃÓöººÅ£¬¶ø²»ÊǷֺ𣼴¸ÄΪA=;
ÎÒ¶ÔÄãµÄ³ÌÐò×öÁËÒ»µã¸Ä¶¯£¬ÈçÏ£º
function ...

ÎÒ×Ô¼ººóÀ´½â¾öÁË,ÎÊÌâ²»ÊÇÔÚÄÇÀï,¶øÊÇÔÚÄǸöÄã×îºóÒªÉèÖÃÒ»ÏÂÓÅ»¯²ÎÊý,»¹ÓÐÄǸö×î³õµãx0µÄÑ¡Ôñ,×öÓÅ»¯µÄʱºòҪѡÔñ·ûºÏÔ¼ÊøÌõ¼þµÄµã,È»ºó»ù±¾ÉϾͿÉÒÔ³öÀ´ÁË,Õâ¸öº¯Êý»¹ÊǷdz£·½±ãµÄ,ʡϲ»ÉÙ¹¤×÷Á¿
3Â¥2014-11-13 20:13:20
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wjxyszgrsgzr

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
4Â¥: Originally posted by Cool_King at 2014-11-13 21:34:46
¾ßÌåÉèÖÃÁËÄÄЩÓÅ»¯²ÎÊýÄØ£¿¿É·ñ´Í½Ì£¿
×î½ü¸ÕºÃ¿ªÊ¼½Ó´¥Õâ¿é£¬ÇóÖ¸µ¼£º£©...

Ö÷ÒªÊÇoptimsetÄÇÀï°É,optimset('LargeScale','off','display','iter');  ¾ÍÊÇÕâÒ»µãµã,´ó¹æÄ£ËÑË÷,¼ÆËãÏÔʾ·½Ê½,ÎÒҲѧÁË2¸öСʱ×óÓÒ,Ò²ÊDzËÄñ
5Â¥2014-11-13 23:52:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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