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An urban network of signalized intersections can be suitably modeled as a hybrid system, in which the vehicle flow behavior is described by means of a time-driven model and the traffic light dynamics are represented by a discrete event model. In this paper, a model of such a network via hybrid Petri nets is used to state and solve the problem of(More)
Signalized urban areas are microscopically represented by means of deterministic-timed Petri nets (DTPNs), with the purpose of providing a suitable modelling tool for traffic management and signalling control. The model described in this paper consists of signalized intersections and roads. In order to properly model traffic congestion, intersections are(More)
A microscopic model of signalized urban areas and its representation by means of stochastic-timed Petri nets are described in this paper, where a traffic-responsive control strategy, whose objective is the optimization of green duration of each stage, is also proposed. The Petri net representation here proposed is the new version of a previously proposed(More)
Urban signalized traffic areas are considered in this paper, with the aim of minimizing congestion situations via a traffic-responsive signalling control procedure founded on a hierarchical Petri net (PN) representation of the system. The higher level of the PN representation consists of net modules, each one representing an intersection, a road, a signal(More)
A particular scheduling problem over a single machine is considered. The jobs belong to different classes, and two jobs belonging to the same class are considered as completely equivalent. A sequence of due-dates is specified for each class of jobs, and the serviced jobs, for each class, are assigned to the due-dates according to the EDD rule. The service(More)
The problem of reducing congestion within urban areas by means of a traffic-responsive control strategy is addressed in this paper. The model of an urban traffic network is microscopically represented by means of deterministic and stochastic Petri nets, which allow a compact representation of the dynamic traffic network. To properly model traffic(More)
A production node within a network of interconnected production centers (as in supply chains) is considered in this paper, with the aim of optimizing inventory levels and production effort. The proposed Hybrid Inventory-Production model consists of two inventories (the input one for raw parts and the output one for processed parts) and a production resource(More)