In this paper, we focus on the linear functionals defining an approximate version of the gradient of a function. These functionals are often used
when dealing with optimization problems where the computation of the gradient of the objective function is costly or the objective function
values are...
01a Articolo in rivista
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Accurate modeling of the patient flow within an Emergency Department (ED) is required by all studies dealing with the increasing and well-known problem of overcrowding. Since Discrete Event Simulation (DES) models are often adopted with the aim of assessing solutions for reducing the impact of this...
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The paper presents a multi-fidelity extension of a local line-search-based derivative-free algorithm for nonsmooth constrained optimization (MF-CS-DFN). The method is intended for use in the simulation-driven design optimization (SDDO) context, where multi-fidelity computations are used to evaluate...
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In this paper, we consider nonlinear optimization problems with nonlinear equality constraints and bound constraints on the variables. For the solution of such problems, many augmented Lagrangian methods have been defined in the literature. Here, we propose to modify one of these algorithms, namely...
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Disease gene prediction is to date one of the main computational challenges of precision medicine. It is still uncertain if disease genes have unique functional properties that distinguish them from other non-disease genes or, from a network perspective, if they are located randomly in the...
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When comparing the cost structure of different transport operators, tools standardising the expenses an ideal efficient operator would incur in producing a specific transport service are valuable instruments for private companies and public authorities. In this paper, we build a bottom-up cost...
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Education and training are among the fields taking advantage of serious games (SGs). In this paper we present Gea 2: A New Earth, a digital SG developed as an immersive three-dimensional virtual learning environment, integrating several educational resources, and including multimedia learning...
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In recent years the so-called New Space Economy or Space 4.0 paradigm has seen a number of new commercial players entering the satellite industry and creating completely new business models, most of which based on very large constellations consisting of several hundreds or even thousands of...
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This paper investigates the collective behaviors induced by the network interconnection of heterogeneous input-affine single-input nonlinear systems through a constant but general directed graph. In this sense, we prove that the dynamics of all agents cluster into as many subgroups as the number of...