<>在看了wangbaocheng 老师的lingo资料后,有一问题想请教:</P>
<>model:<BR>sets:<BR>task/A B C D E F G H I J K/:t;<BR>station/1..4/;<BR>precede(task,task)/A,B B,C C,F C,G F,J G,J D,E E,H E,I H,J I,J J,K/;<BR>link(task,station):x;<BR>endsets<BR>data:<BR>t=45 11 9 50 15 12 12 12 12 8 9;<BR>enddata<BR>min=period;<BR>@for(linkbin(x));<BR>@for(task(i):<BR>@sum(station(k):x(i,k))=1);<BR>@for(precede(i,j):<BR>@sum(station(k):k*x(j,k)-k*x(i,k))>=0);<BR>@for(station(k):<BR>@sum(link(i,k):x(i,k)*t(i))<=period);<BR>end</P>
<>请问这个程序有什么错误么?为什么运行之后出现:</P>
<P>Unexpected fall though Newton loop:Contact LINDO </P>
<P>Systems for patch availability。</P>
<P>2。还有一个问题:</P>
<P>#eq# 和 = 有什么区别?他们分别用在什么时候什么地方?</P>
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