J. van den Berg

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We consider a linear sequence of ‘nodes’, each of which can be in state 0 (‘off’) or 1 (‘on’). Signals from outside are sent to the rightmost node and travel instantaneously as far as possible to the left along nodes which are ‘on’. These nodes are immediately switched off, and become on again after a recovery time. The recovery times are independent(More)
This paper compares two evolutionary computation paradigms: genetic algorithms and particle swarm optimization. The operators of each paradigm are reviewed, focusing on how each affects search behavior in the problem space. The goals of the paper are to provide additional insights into how each paradigm works, and to suggest ways in which performance might(More)
We consider how to improve railway timetables. As case we take the Rompnet of the dutch railways, a highly constrained problem, containing both hard and soft constraints. We show how to cast the constraints into the format of the Genocop system. Every train should run every hour at the same time and hence the constraints should be interpreted modulo sixty.(More)
In this paper we present a generalization of empirical gramians as used for nonlinear model reduction. This approach enables us to directly use data, generated by relevant trajectories, to compute the empirical controllability gramian. The observability gramian can be derived along the trajectory while ensuring that the perturbed initial conditions remain(More)
We consider a linear sequence of 'nodes', each of which can be in state 0 ('off') or 1 ('on'). Signals from outside are sent to the rightmost node and travel instantaneously as far as possible to the left along nodes which are 'on'. These nodes are immediately switched off, and become on again after a recovery time. The recovery times are independent(More)
Multiple-view feature modelling can support applications from various phases of product development, by providing an own view on a product for each of these applications. Each view contains a feature model of the product specific for the application. Current approaches to multiple-view feature modelling only deal with form features. Hence, only the later(More)
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