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<><br>高手一定要关照这个啊!!!<br>首先非常感谢各位浏览我的问题。我的lingo运行不出,如果你们也运行不出,看看哪里错了,谢谢。<br>capacity是指的是配送中心的规模,如果建立,则yn为1且capacity为大于8000,如果不建立,则yn为0且capacity为0,能不能告诉我,怎么建立这种关系。下面是具体参考模型(也许高手不用看就已经知道怎么建立这种关系的式子了),我指的是Lingo软件,当然其他的软件的编程也可告知,谢谢。</P>
<>感谢哪位能改成matlab 语言么??<br>以下是我建立的一个简单地配送中心的模型。<br>Sets:<br>center/dc1,dc2,dc3/: yn,capacity,a,b,c,t;<br>customer/cu1,cu2,cu3/: demand;<br>routes(center,customer):price,length,volume;<br>Endsets<br><a href="http://www.shumo.com/bbs/mailtMin=@sum(center(i):capacity(i)*a(i)/t(i" target="_blank" >Min=@sum(center(i):capacity(i)*a(i)/t(i</A>))<br><a href="http://www.shumo.com/bbs/mailt+@sum(center(i):capacity(i)*b(i" target="_blank" >+@sum(center(i):capacity(i)*b(i</A>))<br><a href="http://www.shumo.com/bbs/mailt+@sum(center(i)@sum(customer(j):volume(i,j))*c(i" target="_blank" >+@sum(center(i)@sum(customer(j):volume(i,j))*c(i</A>)))<br><a href="http://www.shumo.com/bbs/mailt+@sum(routes(i,j):price(i,j)*length(i,j)*volume(i,j" target="_blank" >+@sum(routes(i,j):price(i,j)*length(i,j)*volume(i,j</A>));<br>@for(center(i)bin(yn(i)));<br>@for(center(i)|yn(i)#eq#1:capacity(i)>=8000);<br>@for(center(i)|yn(i)#eq#0:capacity(i)=0);<br>@for(center(i)sum(customer(j):volume(i,j))<=capacity(i));<br>@for(customer(j)sum(center(i):volume(i,j))=demand(j));<br>data:<br>demand=8000 7000 5500;<br>a=4;<br>b=2;<br>c=2;<br>t=20;<br>rice=0.2 0.25 0.18<br>0.8 0.5 0.4<br>1.3 0.8 0.7;<br>Length=45 55 40<br>15 25 30<br>10 18 20;<br>enddata</P>
[此贴子已经被作者于2005-11-17 12:51:53编辑过]
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