• Citations Per Year
Learn More
A hybrid model for an anaerobic digestion process is proposed. The fermentation is assumed to be performed in two steps, acidogenesis and methanogenesis, by two bacterial populations. The model is based on mass balance equations, and the bacterial growth rates are represented by neural networks. In order to guarantee the biological meaning of the hybrid(More)
This paper presents a hybrid approach for the modelling of an anaerobic digestion process. The hybrid model combines a feed-forward network, describing the bacterial kinetics, and the a priori knowledge based on the mass balances of the process components. We have considered an architecture which incorporates the neural network as a static model of(More)
In this paper, we present a numerical solution for an inverse problem to estimate an unknown spacewise-dependent coefficient in a parabolic system. The identification problem is formulated using an Output Least Square Method which consists in minimizing a cost function (criterion) taking into account both the measured outputs of the system and the outputs(More)
  • A. Karama, Peter J. Weisberga, Robert M. Schellerb, Dale W. Johnsona, W. Wally Millera
  • 2012
Long-term nutrient cycling dynamics are the result of interactions between forest succession, disturbance, nutrient cycling, and other forest processes. We developed NuCycling-Succession, a simple nutrient cycling and succession extension for the LANDIS-II landscape model of forest dynamics, to examine the interactions between these forest processes in(More)
In this paper, the aim is to develop a reduced model of a non linear distributed parameter system of hyperbolic type using the Orthogonal Collocation Method. The approach consists to approximate the original hyperbolic partial derivative equations describing the plant by a set of ordinary differential equations. The method is detailed for modeling a fixed(More)
  • 1