Page 268 - KAPPA - Ecrin v4.30 tutorials

Ecrin v4.20 - Doc v4.20.01 - © KAPPA 1988-2011 Topaze Guided Session #1 • TopGS01 - 22/24
If you do not reset the match, a drag should always be followed by a new generation of the
model to update the History plot.
C01.4 • Improve
This option calls a nonlinear regression
algorithm that will adjust the desired model
parameters, in order to match the rate and/or
the cumulative and/or the pressure.
Select Improve.
Fig. C01.14 • Improve dialog
The error between the model and the data is calculated on automatically selected points, which
can be controlled using the 'Select Regression Points' button.
Leave all the weights to 1. Keep Pi constant by un-checking the corresponding checkbox.
Press Run.
During the regression, a dialog shows the evolution of the parameters, and the successive
iterations are shown on the history plot. When the regression completes, or if Cancel is
pressed, the last solution is generated.
Fig. C01.15 • Result after improve (loglog scale modified)