Hello Marc, Scilab is well fitted for this kind of problem if you use the right tools: we now have the sundials ode solvers and the very robust Ipopt, both working with Scilab or compiled gateways. I have already used these features for big identification problems, so fell free to contact me directly.
Best regards, S. > Le 27 août 2024 à 19:14, Marc Bletry <marc.ble...@univ-tours.fr> a écrit : > > Hello, > > I have a problem under the form of a set of 2 ODE that includes 6 free > parameters. I need to optimize these parameters based on experimental > results. So far, basically, I have implemented a C++ object that solves the > problem (using RK4 method), can interpolate these results, can load an > experimental file and determine the distance between model and results using > the interpolated function. All this is in one big fat class. Its constructor > takes 2 filenames: one for the experimental results and the other one for > time parameters driving the system (strain and strain rate, to be more > precise). > > Now, I am looking for a method to adjust my parameters (which differ greatly > in magnitude : some are of the order of 1e-28, others 0.02 and others 1e9 or > even 1e13). I was wondering whether it would be possible to use Scilab's > optim to do this, but I can't find an example using C++ classes : only C and > Fortran 90. Would anyone know if there is a way to do this ? I don't want to > have to reload the experimental files at each iteration : that would take > forever, so it seems to me I need an object to store this... or maybe there > are solutions in C, but I'm really not familiar with that language... > > Thanks a lot ! > > Marc > _______________________________________________ > users mailing list - users@lists.scilab.org > Click here to unsubscribe: <mailto:users-unsubscr...@lists.scilab.org> > https://antiphishing.vadesecure.com/v4?f=a01NeVpJUVFuWGRPdUpiU4hIl7CD4oIZ5qZTWkefszSPMI1u6TlC47ZQP1z_GQeV&i=UldjRTVlRUx4UHBhbllkdFA7WGfJB43MDzhO7AXRXaw&k=EnVP&r=VlJpQU1pSUdMSmhaSzdCcpTBAiSOd6CirytNheuI00tnSE4b8Sp1M51JqGqXjbZ2&s=c9135c361ff6b320d36cbcd2ef1e1fbf0cef088a91d9f90f39a12b0041efbb5d&u=https%3A%2F%2Flists.scilab.org%2Fmailman%2Flistinfo%2Fusers > This email and any attachments are intended solely for the use of the > individual or entity to whom it is addressed and may be confidential and/or > privileged. > > If you are not one of the named recipients or have received this email in > error, > > (i) you should not read, disclose, or copy it, > > (ii) please notify sender of your receipt by reply email and delete this > email and all attachments, > > (iii) Dassault Systèmes does not accept or assume any liability or > responsibility for any use of or reliance on this email. > > > Please be informed that your personal data are processed according to our > data privacy policy as described on our website. Should you have any > questions related to personal data protection, please contact 3DS Data > Protection Officer > https://antiphishing.vadesecure.com/v4?f=a01NeVpJUVFuWGRPdUpiU4hIl7CD4oIZ5qZTWkefszSPMI1u6TlC47ZQP1z_GQeV&i=UldjRTVlRUx4UHBhbllkdFA7WGfJB43MDzhO7AXRXaw&k=EnVP&r=VlJpQU1pSUdMSmhaSzdCcpTBAiSOd6CirytNheuI00tnSE4b8Sp1M51JqGqXjbZ2&s=64b1259aae0f49f5661b687e48ab952c2f7fccecd480014d1606bd16e950c85b&u=https%3A%2F%2Fwww.3ds.com%2Fprivacy-policy%2Fcontact%2F > _______________________________________________ users mailing list - users@lists.scilab.org Click here to unsubscribe: <mailto:users-unsubscr...@lists.scilab.org> https://lists.scilab.org/mailman/listinfo/users This email and any attachments are intended solely for the use of the individual or entity to whom it is addressed and may be confidential and/or privileged. If you are not one of the named recipients or have received this email in error, (i) you should not read, disclose, or copy it, (ii) please notify sender of your receipt by reply email and delete this email and all attachments, (iii) Dassault Systèmes does not accept or assume any liability or responsibility for any use of or reliance on this email. Please be informed that your personal data are processed according to our data privacy policy as described on our website. Should you have any questions related to personal data protection, please contact 3DS Data Protection Officer https://www.3ds.com/privacy-policy/contact/
