[SCIP] Question

[Robert Lion Gottwald]

I'd like to extend the answer by pointing to a SCIP extension called SD-SCIP

http://sdscip.zib.de/

which might be applicable to the type of problem your describe.

Best,

Robert


On 09/05/2017 12:26 AM, Ambros Gleixner wrote:
> Dear Walelign,
>
>
> Am 04.09.2017 um 16:52 schrieb Walelign Nikshi:
>>  Dear SCIP developers,
>>
>> Sorry for bothering you guys.
>> This is one of my multiple trial to get response for my question. I
>> would really aprecitae if you can get back to me.
>>
>> I have a Mixed integer optimal control problem and I would like to solve
>> this problem as a MINLP. I have tried to solve this using genetic
>> algorithm and I failed to get a solution to it. I wanted to try this in
>> SCIP and I think it is written in C language. All I have done is in
>> Matlab and I was wondering if there is a way to run the Matlab code in
>> SCIP package
>
> Currently this is not possible.
>
>
>> or how hard is it formulate the problem in C for this software?
>
> If you ave no C experience, it is difficult.  You can look at the 
> example code in
>
> http://scip.zib.de/doc/html/CALLABLELIBRARY_MAIN.php
>
> but an easier possibility might be to build a ZIMPL model 
> (http://zimpl.zib.de).
>
>
>> CAn the solver handle
>>     -Nonlinear,
>
> Yes.
>
>>     -Discontinuous
>>     -Non smooth , and
>
> In principle yes, but we have no "piecewise" constraints so far. But 
> you can always use binary variables to model piecewise constraint 
> function.
>
>>     - Non-convex problems in objective function, constraint, and 
>> dynamics?
>
> Yes.
>
>> And will upto how many degrees of freedom system can be solved with
>> SCIP? I have a 6 degree of freedom optimal control system (6 states)
>
> We cannot answer this question.  SCIP is not an OC solver and how it 
> performs for a MINLP discretization will very much depend on your 
> formulation.
>
> This is not the right mailing list for general questions on how to 
> solve an MIOCP using an MINLP solver.  But if you make a serious 
> effort yourself and get stuck on how to use SCIP, then we can try to 
> help.
>
> Best,
> Ambros
>
>
>
>> Could you please help me on this one?
>>
>> Thanks,
>> Wale
>>
>> -- 
>> */
>> /*
>> */Best regards,/*
>> */
>> /*
>> */~~~~~~/*
>> */Walelign M. Nikshi /*
>> */PhD student/*
>> */Dept. Mechanical Engineering/*
>> */South Dakota School of Mines & Technology/*
>> */501 E. Saint Joseph St/*
>> */Rapid City, SD, 57701/*
>> */(605) 321 3805 (mobile)/*
>> */~~~~~~~~~~~~~~~~~~~~~/*
>> */
>> /*
>>
>>
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>