Mohammad Humyun Fuad Rahman
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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...

Mohammad Humyun Fuad Rahman created a post,
IfElse condition for GUROBI C++ is not working
AnsweredHi, I want to apply the IfElse 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...

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...

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...

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...

Mohammad Humyun Fuad Rahman created a post,
How to develop chanceconstraint based model in GUROBIC++
Awaiting user inputHi, Just wondering how to adopt uncertainties in mathematical model (e.g., chanceconstraint based) by GUROBIC++. Any relevant examples (code and model) would be appreciated.

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.

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...

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...