Suyue Xu

Thank you, Jaromil I will try to clean up very small coefficients and pay attention to the numeric issues.Thank you for your kindly comment again!

Thank you for your comment! It seems that the model has numerical issues, as the binary variables could oscilate during the branch-and-bound.Here is the possible problem syntax(written in MATLAB wi...

Hi Mario It seems that the model is confronted with severe numeric issues as some warnings prompt after : Warning: Model contains large matrix coefficient range          Consider reformulating mo...

And here's also answers for your three suggestions: for suggestion 1, I'm worried about whether quardratic model would deteriorate the efficiency since the solving procedure is in a iteration.Also...

Thanks for the prompt response Mario! I have tried to reset these parameters:'Aggergate','AggFill' and 'IntFeasTol',but gurobi still finishes 'infeasible'.And after I set the parameter ' Feasibilit...

Here's the message of infeasible model (when 'presolve' parameter is set to 0): Nodes    |    Current Node    |     Objective Bounds      |     Work Expl Unexpl |  Obj  Depth IntInf | Incumbent    ...

The programme is weitten in Matlab with yalmip.Here are some details: I have linearized two items of two variables multiplication in order to avoid quardratic models as follows,the result is the li...

Hi Matthias, I've followed your advice and also revised some constraints.Now the model seem to be able to run but new problems emerge: Warning: max constraint violation (7.9532e-01) exceeds toleran...

Thank you for your comment! I tried on another PC and it started to compute IIS.So maybe the model is on the brink of infeasibility as you said.I'll check the guidelines to reset parameters pertain...

struct relaxresult are as follows:           status: 'OPTIMAL'     versioninfo: [1×1 struct]         runtime: 10.6599            work: 13.3870          objval: -1.0790e+10               x: [159080×...