Cass C
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Latest activity by Cass C-
Cass C commented,
Hello Jaromił Thanks for the reply. I know a MIP problem can be sometimes tough to be solved. But here the trouble that I met is not mainly caused by MIP. The loop I added in my model just aims to...
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Cass C created a post,
how to decrease the running time for a sequence optimisation
Awaiting user inputHello, I got an optimisation problem that requires finding out the min/max value of the system at each time step (hourly) for 24 hours. The process is like, e.g., when the problem has to be optimi...
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Cass C commented,
Hi, Riley, many thanks for this. It indeed solved my trouble. I put it in the wrong location before and that was why I got some issues. Best
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Cass C commented,
Hi Jaromił Najman Many thanks for the reply. I have went through some documents which mentioned, the reason might be the MIP. By using an automated solve loop, this may cause Gurobi to reuse older ...
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Cass C created a post,
why using gurobi solver in loop could cause increase the optimisation time.
Answeredi was solving a optimisation problem based on sequential case. I have run the model for 24 times (24 time steps in my model and I have to obtain the optimal solution for each time step). Previously...
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Cass C commented,
Hi Jaromił Many thanks for this, you are right! It should be formatted in list or dictionary, or it won't work. Best Qikun
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Cass C created a post,
how can I get constraints
AnsweredHi, I got some constraints as: I want to get them by using getConstrByName(), however, this method chooses one arbitrarily. So is there any other way helps to obtain all constraints with the same n...
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Cass C created a post,
infeasibility occurred after using the solution as input
Awaiting user inputHi Just a very wired issue happened to my case. My previous problem was finding the minimum cost of the system, considering the operation of each component. Then I got the solution and wanted to ...
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Cass C commented,
I think I am now understand the approach, but generally, how can I add the ordering of these variables, is there any cases that I can learn something from? Variables in my model are already indexed...
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Cass C commented,
Hi Many thanks for this but I did not get the method, could you please share more details on that? model.lp the LP file is attached please have look if it is required. Best Cass