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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)
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)
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 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)
Supply chains integrate production centers with raw materials and part suppliers and with logistics service providers, in an integrated environment in which coordination aspects as well as competitive issues may take place. In this paper, a hybrid model for the representation of a generic production center of a supply chain is presented and discussed. The(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)