tcsheep01 发表于 2008-5-1 12:59

求助 帮忙转化为lingo的语言求解 感谢

<p>...刚学两天 什么都还不懂..</p><p>要求min=<span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">∑</span><span lang="EN-US"><font face="Times New Roman">xi*pi  i从1到45  pi是长度为45的已知的向量 </font></span></p><p><span lang="EN-US"><font face="Times New Roman">约束条件有1,       xi为0 , 1   </font></span></p><p><span lang="EN-US"><font face="Times New Roman">                  2 ,     80% &lt;= (5750*0.95)/(<span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">∑</span><span lang="EN-US">xi*ni) &lt;= 90%  ni为长45的已知向量;</span></font></span></p><p><span lang="EN-US"><font face="Times New Roman"><span lang="EN-US"></span></font></span></p><p><span lang="EN-US"><font face="Times New Roman"><span lang="EN-US"></span></font></span></p><p><span lang="EN-US"><font face="Times New Roman"><span lang="EN-US">感谢了    </span></font></span></p><p><span lang="EN-US"><font face="Times New Roman"><span lang="EN-US"><br/><br/>
                                </span></font></span></p>
[此贴子已经被作者于2008-5-1 13:16:17编辑过]

hubulwm 发表于 2008-5-2 11:13

model:<br/>sets:<br/>jihe/1..45/:x,p,n;<br/>endsets<br/>data:<br/>p=?;<br/>enddata<br/>@for(jihe:@bin(x));<br/>@sum(jihe:x*p)&lt;=5750*0.95/90;<br/>@sum(jihe:x*p)&gt;=5750*0.95/80;<br/>min=@sum(jihe:x*p);<br/>end

hubulwm 发表于 2008-5-2 14:31

<p>不好意思,范围给弄反了,下面的可用:</p><p>model:<br/>sets:<br/>jihe/1..45/:x,p,n;<br/>endsets<br/>data:<br/>p=?;<br/>enddata<br/>@for(jihe:@bin(x));<br/>@sum(jihe:x*p)&lt;=5750*0.95/0.8;<br/>@sum(jihe:x*p)&gt;=5750*0.95/0.9;<br/>min=@sum(jihe:x*p);<br/>end<br/></p>

tcsheep01 发表于 2008-5-2 15:24

谢谢了

f4g546521 发表于 2008-11-10 17:45

不错，顶起来34

不错，顶起来
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