Dear all, We are currently developing a modeling & simulation plateform, at the Institute of Radioprotection and Nuclear Safety (Cadarache, France), for simulating the fate and transport of pollutants in environmental ecosystems that basically involve discrete and continuous-time processes. >From a mathematical point of view, we have to solve systems of multidimensional coupled (non)linear ODEs (up to 2 dimensions), with either discrete or continuous right-hand side terms.
We have been investigating for nearly two years the computational capability of graphical programming toolboxes, such as Goldsim & Matlab/Simulink, but were not completely satisfied with. We identified that Ptolemy II could be a good candidate, in the sense that we were there able to easily model embedded (eco)systems of different characteristic time scales, following a hierarchical approach, and perform probabilistic calculations (i.e. Monte Carlo) using high-order actors. However, we realized that : 1) PtolemyII did not support vectorization at least in the CT domain yet, 2) Simulations in Ptolemy II (from Vergil), were rather slow compared toabove-mentionned toolboxes. Thus, our questions are : 1) Would it be difficult & energy-consuming to extend the CT domain (i.e. integrators) and discrete-event domains to support multi-dimensional mathematical systems ? 2) How could we speed up the calculations ? Is the shallow code or C code generator operational for this kind of problem ? We would very much appreciate any suggestion or help Dr. Marc-André Gonze Symbiose project leader IRSN/DEI CE Cadarache, France tel. : 33-4-42-19-95-44 e-mail : [EMAIL PROTECTED] ---------------------------------------------------------------------------- Posted to the ptolemy-hackers mailing list. Please send administrative mail for this list to: [EMAIL PROTECTED]
