Wednesday, November 17, 2010

OVMP Software on Neos Solver

I succeeded in running the OVMP software I received (GAMS model named namely StoIP_norm1.gms) on a free solver. By downloading the Neos software from this location (command to run this submission tool: java -cp NeosClien.jar:apache/xmlrpc-1.2-b1.jar NeosClient) and using the following parameters:
  • Server host:
  • Server port: 3332
  • Solver: Mixed integer nonlinearly constrained optimization => AlphaECP:GAMS
The results the solver returned can be found in this pdf.

GAMS Versus AMPL: it looks like a free solver is available as well, called MathProg. The syntax of AMPL is more natural/easier to read, it more closely resembles the algebraic formulations. After reading the first couple of chapters from the "AMPL: A Modeling Language for Mathematical Programming" book by Robert Fourer, David M. Gay and Brian W. Kernighan. Since the GAMS model seems to be pretty easy to understand, I see no problem in translating it to AMPL. I have to admit before stumbling upon these solvers while doing my thesis research, I had no idea about the existence of them ... but now I see the power of these solvers for optimization problems.

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