问题描述
int NbPeriods = ...; range Periods = 1..NbPeriods;
int NbParts = ...; range Parts = 1..NbParts;
int Nbsuppliers = ...; range suppliers = 1..Nbsuppliers;
int NbProcesses = ...; range Processes = 1..NbProcesses;
int NbPS[1..NbParts,1..NbProcesses*Nbsuppliers] = ...;
float Demand[Parts][Periods] = ...;
float BOH[Parts] = ...;
float Capacity[suppliers][Processes] = ...;
float ProcessMapping[s in 1..Nbsuppliers,pr in 1..NbProcesses,p in 1..NbParts] = NbPS[p,pr+NbProcesses*(s-1)];
float Price[Parts][suppliers] = ...;
dvar float+ Supply[1..NbParts,1..NbPeriods*Nbsuppliers];
dvar float+ EOH[Parts][Periods];
dvar float+ Util[1..NbProcesses,1..NbPeriods*Nbsuppliers];
minimize
sum( t in Periods ) DOIDelta[t] ;
subject to {
forall(p in Parts)
EOH[p][0] == BOH[p];
forall(p in Parts)
forall( t in Periods)
EOH[p][t] == EOH[p][t-1] + sum(s in suppliers) Supply[p,t+NbPeriods*(s-1)] ;
forall(t in Periods)
forall(pr in Processes)
forall(s in suppliers)
Util[pr,t+NbPeriods*(s-1)] == sum(p in Parts) (Supply[p,t+NbPeriods*(s-1)] * ProcessMapping[p,pr+NbProcesses*(s-1)] );
}
错误消息针对最后一个 Util 行:运算符不适用于 dvar float+ * float[][range]。我已经检查了有关此主题的其他帖子,问题都在括号中。即使添加括号,错误仍然存在。感谢您的帮助。
解决方法
processMapping 是一个 3D 数组而不是一个 2D 数组
forall(t in Periods)
forall(pr in Processes)
forall(s in Suppliers)
Util[pr,t+NbPeriods*(s-1)] == sum(p in Parts) (Supply[p,t+NbPeriods*(s-1) * ftoi(ProcessMapping[s,p,pr+NbProcesses*(s-1)])] );
会更好地工作