Zheren Zhang

Hi Jaromił Thank you for your tipps. I will follow your suggestion and report the issue or try to implement a convex relaxation like McCormick relaxation if the values of Pi are still unexpected. B...

Hi  The model of the primal and dual subproblem is based on the paper "A Benders decomposition approach to transmission expansion planning considering energy storage" without parallel installation...

Hi Jaromił I've expected that some Pi of the constraints which contain the fixed complicated variable of the original problem are not zero, like the LP. However, after adding the quadratic constrai...

Hi Jaromił You have understand my issue correctly despite my unclear discription. I've followed the tutorial of the RME and found out that are too many parameters to reproduce. Am I allowed to send...

Hi Mario I've uploaded the complete model and the Benders approach, which could be necessary, via the link you provide. I will work on the modification of the Benders cut using your tipps. Thank yo...

Hi Mario I do get two significantly different optimal objective values after setting IntegralityFocus = 1, while the worse one is as same as the solution of the Benders approach. Since the sense of...

Hi Mario Both solutions are feasible. In the solution of Gurobi, the decision variables do deviate by a value less than 1e-5, while the objective value of two approaches are significantly different...

Hi Mario You have a proper concept of my setup despite my unclear discription. What I should have mentioned is that the subproblems of my model are always feasible and there are no multiple optimal...

Hi Riley Thank you for the reply and sorry for my unclear discription. In this case the variable "a" is an gurobipy linear expression which is a sum that every summand of it is expected to contain ...