how to optimize the result of comsol with matlab??

Hello everyone!

I want to know how to optimize my problem.
already i got the result from matlab using the m.file which is from Comsol.
Afterthat, I don't know how to solve that...

Because I didn't use the function of optimization in matlab.
it's first time. So i want to know how to do.

And I checked some pdf file of optimization tool in matlab.
if i want to optimize something i need the equation to solve.
But in my case, I don't know how to determine my equation in my problem.

if you guys know my problem, let me know....
Or if there is a tutorial or guideline, let me give please.