ANGHINOLFI , Davide

The increase of rail freight transportation is highly desirable, both for its capacity of moving bigger quantities of cargo with respect to road transport and for its reduced environmental impact. Among the different decisional aspects related to rail transportation planning, in this paper the problem of optimizing train loading operations in...

This work proposes a hybrid metaheuristic (HMH) approach which integrates several features from tabu search (TS), simulated annealing (SA) and variable neighbourhood search (VNS) in a new configurable scheduling algorithm. In particular, either a deterministic or a random candidate list strategy can be used to generate the neighbourhood of a...

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In this paper the NP-hard single machine total weighted tardiness scheduling problem in presence of sequence-dependent setup times is faced with a new Ant Colony Optimization (ACO) approach. The proposed ACO algorithm is based on a new global pheromone update mechanism, which makes the pheromone trails asymptotically range between two bounds...

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A new simple MIP heuristic, called Randomized Neighborhood Search (RANS) is proposed, whose purpose is to produce within short time bounds high quality solutions especially for large size MIP problems as the ones characterizing real industrial applications. Starting from starts from a feasible incumbent solution RANS iterates solutions'...

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In this paper we face the train loading problem (TLP) at seaport terminals by proposing a general purpose Lagrangian heuristic. The TLP consists of assigning import containers to the trains departing from the terminal, maximizing the utilization of trains, minimizing the distance travelled by containers from their locations in the storage area...

In this paper we present a new Discrete Particle Swarm Optimization (DPSO) approach to face the NP-hard single machine total weighted tardiness scheduling problem in presence of sequence-dependent setup times. Differently from previous approaches the proposed DPSO uses a discrete model both for particle position and velocity and a coherent...

Nowadays most industries do not integrate product, process and energy data. Costs due to energy consumption are often considered externalities and energy efficiency is not deemed a relevant performance criterion. In energy-intensive processes, as injection moulding, the specific energy consumption, embedded inside the same products, depends on...

Service operations management of metropolitan gas networks at operational level implies the optimization of decisions related to logistic activities, taking into account multi-objectives and operational constraints. This paper proposes a metaheuristic approach for the operational planning of the daily logistic activities based on vehicle...

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Separated collection is an important part of waste management, because it allows material recovery. In order to organize separate collection operations, complex decisions need to be taken on the basis of a large amount of data. In this paper, the problem of planning the door-to-door waste collection of multiple materials for a municipality is...

The paper presents a preliminary study on energy-aware scheduling proposing a mathematical model to face the problem of optimally planning energy consumption levels for a given detailed schedule. As a test case a identical parallel machine scheduling problem is considered where jobs are characterized by release and due dates and the objective...

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Energy-aware scheduling (EAS) of manufacturing processes demands a mathematical model to optimally plan energy saving for a given schedule. The proposed approach starts from a reference schedule generated by an Advanced Planning & Scheduling (APS) system which does not consider energy saving. The new approach relies on a Mixed Integer...

Process technology capabilities are becoming increasingly important as flexible manufacturing continues to be more prevalent, and as competition compels companies to provide expanded variety, at ever lower cost, so introducing plant and processes technological constraints. Model flexibility can also benefit from an appropriate production...

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In this paper we propose a planning procedure for serving freight transportation requests in a railway network with fast transfer equipment at terminals. We consider a transportation system where different customers make their requests (orders) for moving boxes, i.e., either containers or swap bodies, between different origins and destinations,...