[ MINLP World Home | MINLPLib | Contact ]

## gear4.gms:

#### References:

• GAMS Development, Reformulation of Models from GAMS Library.
• GAMS Development, Reformulation of Models from MacMINLP.
• Deb, K, and Goyal, M, Optimizing Engineering Designs Using a Combined Genetic Search. In Back, T, Ed, Proceedings of the Seventh International Conference on Genetic Algorithms. 1997, pp. 521-528.
• Original source: GAMS model gear.gms from Gams Model Library and AMPL model geartrain.mod from MacMINLP

Point: p1
Best known point (p1): Solution value 1.64 (global optimum, BARON certificate)

\$offlisting * MINLP written by GAMS Convert at 04/27/01 14:45:36 * * Equation counts * Total E G L N X * 2 2 0 0 0 0 * * Variable counts * x b i s1s s2s sc si * Total cont binary integer sos1 sos2 scont sint * 7 3 0 4 0 0 0 0 * FX 0 0 0 0 0 0 0 0 * * Nonzero counts * Total const NL DLL * 9 5 4 0 * * Solve m using MINLP minimizing objvar; Variables i1,i2,i3,i4,objvar,x6,x7; Positive Variables x6,x7; Integer Variables i1,i2,i3,i4; Equations e1,e2; e1.. - 1000000*i1*i2/(i3*i4) - x6 + x7 =E= -144279.32477276; e2.. objvar - x6 - x7 =E= 0; * set non default bounds i1.lo = 12; i1.up = 60; i2.lo = 12; i2.up = 60; i3.lo = 12; i3.up = 60; i4.lo = 12; i4.up = 60; \$if set nostart \$goto modeldef * set non default levels * set non default marginals \$label modeldef Model m / all /; m.limrow=0; m.limcol=0; \$if NOT '%gams.u1%' == '' \$include '%gams.u1%' \$if not set MINLP \$set MINLP MINLP Solve m using %MINLP% minimizing objvar;