Shahrzad Valizadeh
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Activity overview
Latest activity by Shahrzad Valizadeh-
Shahrzad Valizadeh commented,
Thank you so much Riley for your great comment and guidance.
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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 Two-Phase method. At the end of Phase One, the summation of artificial variabl...
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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 ...
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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, ...
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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...
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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...
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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",...
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Shahrzad Valizadeh commented,
Thank you Riley for your prompt response.
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Shahrzad Valizadeh commented,
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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...