Command >>>> SENSITIVITY
Manual Page for Command >>>> SENSITIVITY
>>>> SENSITIVITY: (-)rsens
dD = |delta S|
where |delta S| is the change of the objective function if the parameter is perturbed by a certain,
small value (see command >>> PERTURB).
This command defines one of the criteria used for automatic parameter selection. It examines
the potential of a parameter to reduce the objective function based on the sensitivity coefficient:
The sensitivities are normalized to the maximum sensitivity:
omega = dD / dDmax
Those parameters with an omega-value larger than |rsens|, i.e., the most sensitive parameters, are
selected. Parameters which are unlikely to significantly reduce the objective function are
(temporarily) excluded from the optimization process.
If a negative value is given for rsens, the selection criterion is relaxed with each iteration k,
and reaches zero for the last iteration max_iter, i.e., all parameters specified in block > PARAMETER
are selected for the final step.
rsensk = |rsens| (1 - k/max_iter)
>>> SELECT parameter automatically every
>>>> : 3 ITERATIONS
>>>> based on the SENSITIVITY criterion with rsens : -0.10
>>>> ITERATION (s) |
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Page updated: July 29, 1997