EASY-FIT ModelDesign

Developer's DescriptionBy Klaus SchittkowskiSolve constrained nonlinear parameter estimation problems.The system solves constrained nonlinear parameter estimation (nonlinear regression, data, curve and surface fitting) problems based on ODEs, DAEs, PDEs, PDAEs, steady-state systems, Laplace equations, and analytical functions.A statistical analysis provides confidence intervals, correlation and covariance matrix, identification of significant parameters, and allows optimum experimental design.Model equations are defined in a modeling language called PCOMP and are interpreted and evaluated during runtime.