# Gayan Lankeshwara

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## Activity overview

Latest activity by Gayan Lankeshwara
• Gayan Lankeshwara created a post,

### Need a help with the suboptimal solution obtained with the barrier-method ?

Hi there, I am using Gurobi as the solver to solve a QCP problem and here is an extract from the log file. Academic license - for non-commercial use onlyOptimize a model with 100 rows, 92 columns a...

• Gayan Lankeshwara created a post,

### Warning messages in MATLAB while using Gurobi for distributed optimization

Hi there, I am using Gurobi as the solver for an optimization problem written in MATLAB with YALMIP toolbox. Since the original problem can be decomposed into a set of sub problems, I am using par ...

• Gayan Lankeshwara commented,

Dear Jaromil, Thank you very much for your useful suggestions. I will follow them and update in the forum in case I face the same issue. Cheers.

• Gayan Lankeshwara commented,

Hi Jaromil, Thank you for your comments and suggestions. MIP starts seems interesting but I need to make look into a possible feasible solution first. At the same time I am not sure whether I have ...

• Gayan Lankeshwara commented,

Hi Jaromil, Sorry for being late to reply. I think its better to give a full picture of the mathematical formulation as I was unable to convey the message properly. Here is a very brief formulation...

• Gayan Lankeshwara commented,

Hi Jaromil, The objective of the optimisation problem is in the quadratic form  objective : x^{T}Qx + u^{T}Ru %% quadraticwhereu \in {0,1,2,3,4} %% makes the problem MIQP%% constraints for u and xu...

• Gayan Lankeshwara commented,

Hi there, I am facing the same issue in solving a MIQP optimisation problem. To be specific I am following Model Predictive Control technique so at each step in the algorithm I need to perform a MI...