Yali Chen

Hi, Marika, thank you for your reply！ apart from the code, is there a problem with my optimization problem itself and is it in a form that can be solved by Gurobi? Looking forward to your reply! Ma...

are other optimizers more suitable for solving this problem？

Hi, Eli, based on your comments, I would like to continue asking you some questions. First, my objective is to choose M numbers from 1 to K, and for each combination I∈K, calculate the lg(σ2Z− MSE)...

Hi Eli, sorry to bother you again.  According to your comments about the code I showed above，the error is in the following part， constr_1 = LinExpr(0)for k in range(0,K):    for km in range(0,M): ...

Hi Jaromił, sorry to bother you again. IndexError: list index out of range: constr_1.addTerms(1, b0[combination[km]]*r[combination[km]]*cov(k,combination[km])). from gurobipy import *from numpy im...

Hi Jaromił, according to your comments, we have changed the code, but there are still some problems. TypeError: unsupported operand type(s) for *: 'int' and 'tupledict'：sum7=2*nu-math.log(K**2)-(ma...

Hi Jaromił, according to your comments, we have changed the code, but there are still some problems. Looking forward to your reply! Many thanks! We use Gurobi to sove the following problem. Optimiz...

Hi Jaromił, thanks for your help!  All the best, Yali

Hi, thank you very much for your comments. For the optimization problem given by the above picture, optimization variables are underlined in green, and we use Gurobi to sove the problem. According ...

from gurobipy import *from numpy import *import numpy as npimport mathimport random#define global variablesglobal KK = 5global MM = 2global ATtheta1ATtheta1=0.42global ATtheta2ATtheta2=2.00global ...