Thanks for your help, I will recheck the mathematical model then focus on GAMS model.
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Dear Micheal, Thanks for your prompt response. As you mentioned, I have a lot to learn in GAMS. I am quite beginner. For your first comment, it worked properly, thanks for your help. And for second one, your understanding about subsets is correct. With ord(j)-'1' expression, I am trying to check the...
Dear all, As a student on dissertation stage, I am working on a model for cost minimization in train shunting. As a brief clarification of model; there are arriving train units, departing train units and shunting lines on which are used for coupling and decoupling of train units. Mathematical model ...