Shahrzad Valizadeh
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Latest activity by Shahrzad Valizadeh
Shahrzad Valizadeh commented,
Thank you so much Riley for your great comment and guidance.

Shahrzad Valizadeh commented,
Thank you Riley for your response. To clarify: I have a model that is infeasible, and I'm trying to solve it using the TwoPhase method. At the end of Phase One, the summation of artificial variabl...

Shahrzad Valizadeh commented,
My question is, while the RMP is a minimization problem and a new variable with its corresponding coefficients is going to be added to the model, how will the constraints and objective function be ...

Shahrzad Valizadeh created a post,
Constraints in Gurobi
Awaiting user inputi have the following lists list1: [(1, [43, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 9, 9, 9, 0, 0, 0, 0, 0, 0, 7, 2, 2, 5, 0, 0, 0, 7, 6, 0, 3, 2, 4, 4, 0, 0, 0, 0, ...

Shahrzad Valizadeh created a post,
Constraint in Gurobi
AnsweredI have the following constraint in my model: Through using the column generation, I'm going to add a new variable to the model. Definitely the coefficient corresponding to the new variable would...

Shahrzad Valizadeh created a post,
Constraints in Gurobi
Answeredi have the following variable of: b = {} for m in M: for demand_index in range(100): for t in range(tt): b1["O+", "1", m, demand_index, t] = model.addVar(vtype=G...

Shahrzad Valizadeh commented,
Thank you so much Riley for your comment. As I'm using: state_OPM_term = gp.quicksum((b1["O+", "1", m, t]  (0.1 * gp.quicksum(b2["O+", "1", m, demand, t] for demand in D))* weights["O+", "1",...

Shahrzad Valizadeh commented,
Thank you Riley for your prompt response.

Shahrzad Valizadeh commented,

Shahrzad Valizadeh created a post,
Constraints in Gurobi
AnsweredI have the following constraint: model.addConstr(aux1["O+", "1", m, t] == demand  sum(i1["O+", "1", m, t] for m in range(1, m))) model.addConstr(aux2["O+", "1", m, t] == gp.m...