1
我試圖儘量減少有三個參數的目標函數:I,P,J是這樣的:GLPK/GMPL:最小化的目標函數,但保持> 0
param mlu{i in I, p in P, j in out[p]} := traffic[i,p]/capacity[j];
minimize MAXLU{i in I, p in P, j in out[p]}: mlu[i,p,j] * x[i,p,j];
但目標函數必須是大於0,否則就是擊敗了我最小化的目的。
,我試圖通過對目標函數這樣增加了約束,以確保這一點:
s.t. constraint1{i in I, p in P, j in out[p]} : MAXLU[i,p,j] != 0;
,但我得到了以下錯誤:
LP.mod:66: invalid reference to status, primal value, or dual value of objective MAXLU above solve statement
Context: i in I , p in P , j in out [ p ] } : MAXLU [ i , p , j ] !=
glp_mpl_generate: invalid call sequence
Error detected in file glpapi14.c at line 79
Aborted
它甚至有可能做到這一點?感謝您的任何幫助/建議!
如何定義一個非常小的值'e'並添加'obj> = e'? –