Individual-based model to enrich an aggregate model
By: Raphaël Duboz, Frédéric Amblard, Eric
Ramat, Guillaume Deffuant, Philippe Preux (Laboratoire d'Informatique
du Littoral and Cemagref, France)
Date: 31st March/1st April 2003
CPM Report No.: CPM-03-112
We propose to use individual-based models as virtual laboratories to identify parameters of aggregate models. We illustrate this approach with a simple example: the diffusion of particles activated by a Brownian movement. We thus have an aggregated numerical model, as well as an individual-based model of this phenomenon. We consider various alternatives of this example, which lead to different use of the virtual laboratory. We consider in particular the coupling between the two models in which the aggregate model asks for calculations of parameters to the individual-based model. We evoke finally the case of scale shifts in the models and the way it can be managed by this type of approach.