Mohammad Humyun Fuad Rahman
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Activity overview
Latest activity by Mohammad Humyun Fuad Rahman-
Mohammad Humyun Fuad Rahman created a post,
GUROBI Machine learning in C++ API
AnsweredHi, Recently, GUROBI has released a machine learning (ML) package in Python for its mathematical programming solver, which allows to use of trained ML models as constraints and their inputs/outputs...
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Mohammad Humyun Fuad Rahman created a post,
If-Else condition for GUROBI C++ is not working
AnsweredHi, I want to apply the If-Else condition to calculate the tardiness of each job and then, calculate the total tardiness for all jobs in a scheduling problem. The expression for calculating tardine...
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Mohammad Humyun Fuad Rahman commented,
I have implemented this concept assuming that a is a normal array type variable with the following expression. int *a = new int [n_robo]; GRBVar w3 = model.addVar(0, 100, 1, GRB_CONTINUOUS); GRBV...
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Mohammad Humyun Fuad Rahman commented,
Dear Marika, Thank you for your prompt reply! In the above code, w3 is a normal integer type variable in C++. Now, my intention is to store an integer value (say x) w3 from the set of integer value...
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Mohammad Humyun Fuad Rahman created a post,
Issue with indicator constraint in GUROBI C++
Awaiting user inputHi, I am trying to use the following indicator constraint, where z4 is a binary decision variable whose value will determine the value w3 [1,3]. To bridge this relationship, I have expressed anothe...
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Mohammad Humyun Fuad Rahman created a post,
How to develop chance-constraint based model in GUROBI-C++
Awaiting user inputHi, Just wondering how to adopt uncertainties in mathematical model (e.g., chance-constraint based) by GUROBI-C++. Any relevant examples (code and model) would be appreciated.
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Mohammad Humyun Fuad Rahman commented,
Thanks, Riley. I debug the model and identified the issue. The representation of the precedence constraint was incorrect in the model and therefore, it shows infeasible results.
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Mohammad Humyun Fuad Rahman commented,
Dear Riely,Thank you very much for your comment. I have changed the model and its running. However, I face another issue. It shows that the model has got an optimal result, but the actual optimal r...
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Mohammad Humyun Fuad Rahman created a post,
Error in solving a model with two decision variables
AnsweredHi, I am trying to solve a robotic assembly line balancing problem and I am receiving the following error message while running the code 'AddConstr is for linear constraints; use AddQConstr to crea...