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2 ABSTRACT The balanced truncation method for reducing the size of a model was originally developed for linear systems. When extended to nonlinear systems, some considerations need to be faced. First of all, the calculation of the balancing transformation matrix is not unique. This may results in non-physical values for the reconstructed states, which may(More)
This thesis discusses modelling of industrial plants with focus on distillation. A generic industrial plant (or section of plant) can be abstracted as a set of capacities exchanging extensive quantities through connecting streams. Thus the studied system can be represented as a directed graph, where the capacities are the nodes and the streams are the arcs.(More)
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