Question: very poor performance of global optimization toolbox?

Hi

Just started using the global optimization toolbox. Not sure if I am doing something wrong or if it is genuinely awful. After about 20mins it produces a fit that is dreadful,an alternative cheaper package (scop) produces a great fit in about 2 mins. Can anyone see what I'm doing wrong?

Attached are 2 documents -fit test.mw which produces the fits (I'm fitting an ode, it is soluable analytically but in general I wont to use the toolbox for equations that arent soluable analytically so I've used the numerical solver -just as I did in scop) and comparefits.mw which compares the fit produced by maple (blue line) with the fit produced by scop (green line) to the data points (in red) -see plot at the bottom of the document.

Any ideas how to 1) get maple to produce decent fits 2) speed up would be v useful.

thanks

View 8402_fit test.mw on MapleNet or Download 8402_fit test.mw
View file detailsView 8402_comparefits.mw on MapleNet or Download 8402_comparefits.mw
View file details