Libros y Capítulos de Libro

Permanent URI for this collectionhttp://48.217.138.120/handle/20.500.12272/536

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    A soybean supply chain model to analyze the greenhouse gas emissions of the transport sector
    (Computer Aided Chemical Engineering (Book Series), 2022-05-12) Verrengia, María de los Milagros; Vecchietti, Aldo Rodomiro
    This article presents a mathematical model of the soybean´s supply chain for Argentina where the different stakeholders and the material flows among them are represented. The transport used in this sector are trucks, trains, and river ships. The objective is to analyze the emissions of greenhouse gases (GHG) generated by the transportation in this sector using electric trucks as an alternative to biodiesel ones. The model generated is a mixed multi-period / multi-objective linear integer model, destined at minimizing operating and GHG emissions cost. The accuracy of the model is compared against two statistical studies made by the Transport Agency of Argentina in 2014 and 2017 regarding the soybean transportation. The results show a good fit with those reports. Two scenarios are compared, in the first one only biodiesel trucks are used for transportation, while in the second one trains, barges and electric trucks are included. Results show the tradeoff between investment costs and reduction of emissions where it is possible to achieve a 60% GHG decrease, which is far to compensate for the investment cost.
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    Modeling and simulation through the metamodeling perspective : the case of the discrete event system specification
    (Springer Cham, 2023-01-24) Blas, María Julia; Gonnet, Silvio
    The Discrete Event System Specification (DEVS) is a modeling formalism that supports a general methodology for describing discrete event systems with the capability to represent both continuous and discrete systems due to its system theoretic basis. This chapter addresses the use of metamodeling and the role of related technologies in the Modeling and Simulation (M&S) field, mainly devoted to implementing DEVS models. The main aim is to answer the following questions: What is the significance of model-based engineering in the M&S field? Can a computational representation of DEVS defined following the principles of metamodeling improve the modeling task? How can DEVS models obtained through metamodeling integrate with simulators? This chapter discusses using metamodels as the foundation to define formal DEVS models from a computational point of view. A metamodel-based computational representation of DEVS formalism is described. From such a computational representation, how current technologies can be used to support DEVS metamodel in existing M&S software tools is discussed. The chapter shows how concrete DEVS models are used in existing M&S software tools to get executable simulation models through metamodel instantiation. Illustrative examples show how the DEVS metamodel improves the simulation model specification. The chapter concludes with a discussion of the current state of the metamodeling approach used in the M&S field and the remaining problems that need to be addressed in the future.