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A class of production systems are considered in this paper with the aim of determining closed-loop strategies providing the production effort as functions of the system state. The key feature of the considered class of systems is that the demand and the way it is satisfied are asynchronous sequences of part requests and instantaneous withdrawals,(More)
In this paper we present two mathematical formulations and a heuristic approach for the train load planning problem of import containers at a seaport container terminal. The problem consists of determining how to assign a set of containers of different length and weight to the wagons of a train in order to satisfy capacity constraints of both the wagons and(More)
Objective of this paper is to define an efficient control framework for freeway systems based on ramp metering. First of all, a Model Predictive Control (MPC) scheme is proposed in which the well known nonlinear cell transmission model (CTM) is used for the prediction. The model is then reformulated as a mixed logical dynamical (MLD) system, i.e. it is(More)
This paper proposes a freeway traffic controller with the objective of minimizing, at the same time, congestion phenomena and traffic emissions. A multi-class framework is considered in the paper, i.e two classes of vehicles (cars and trucks) are explicitly modelled and specific control actions for each vehicle class are computed. The controller is based on(More)
The objective of the present paper is that of defining a modelling and control framework for freeway traffic in which several vehicle classes are explicitly taken into account. To this end, a multiclass model representing the dynamic behaviour of traffic in a freeway stretch is proposed. In such a model, based on a classical macroscopic model, vehicles are(More)
In this paper we consider the classic second-order macroscopic traffic model, commonly known as the PW model. Firstly, we extend it to a two-class case, in which we consider the simultaneous presence of slow and fast vehicles. Moreover, we determine some numerical constraints useful for realizing a stable simulation implementing equations somehow derived(More)
The main objective of this paper consists in modelling, optimizing, and controlling container transfer operations inside intermodal terminals. More specifically, maritime container terminals are here considered, involving three kinds of transportation modes, i.e., maritime, rail, and road transport. Generally speaking, an intermodal port terminal can be(More)
The objective of the paper is to define a control framework for freeway traffic in which several vehicle classes are explicitly taken into account. The Model Predictive Control approach has been chosen for defining the proposed regulation scheme, in which both ramp metering and speed limitations are adopted as control actions. In the overall control scheme,(More)
The objective of the present paper is the design of a control scheme for effectively managing congestion phenomena in freeways and interurban roadways. Such systems are typically made of several road stretches connected to compose a network and, of course, the dynamic behavior of traffic in each stretch influences the state of traffic in the overall(More)