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Mostrando ítems 21-40 de 1721

A constraint programming approach for the premarshalling problem

Jiménez-Piqueras, Celia; Ruiz, Rubén; Parreño-Torres, Consuelo; Alvarez-Valdes, Ramon (Elsevier, 2023-04-16)

[EN] The enormous amount of containers handled at ports hampers the efficiency of terminal operations. The optimization of crane movements is crucial for speeding up the loading and unloading of vessels. To this end, the ...
A constraint redundancy elimination strategy to improve design reuse in parametric modeling

González-Lluch, Carmen; Plumed, Raquel; Pérez López, David Clemente; Company, Pedro; Contero, Manuel; Camba, Jorge D. (Elsevier, 2021-08)

[EN] Strategies for design reuse play a fundamental role in the development of products that change and evolve over time. Design changes often involve modifications in the geometry of parts and assemblies, which are driven ...
A Constraint-based Approach to Learn Temporal Features on Action Models from Multiple Plans

Garrido, Antonio (Springer-Verlag, 2022-04)

[EN] Learning in AI planning tries to recognize past conducts to predict features that help improve action models. We propose a constraint programming approach for learning the temporal features, i.e., the distribution of ...
A Continuous Multisite Multivariate Generator for Daily Temperature Conditioned by Precipitation Occurrence

Hernández-Bedolla, Joel; Solera Solera, Abel; Paredes Arquiola, Javier; Sanchez-Quispe, Sonia Tatiana; Domínguez-Sánchez, Constantino (MDPI AG, 2022-11)

[EN] Temperature is one of the most influential weather variables necessary for numerous studies, such as climate change, integrated water resources management, and water scarcity, among others. The temperature and ...
A Control Scheme to Suppress Circulating Currents in Parallel-Connected Three-Phase Inverters

Liberos, Marian; González-Medina, Raúl; Patrao Herrero, Iván; Garcerá, Gabriel; Figueres Amorós, Emilio (MDPI AG, 2022-11)

[EN] The parallel operation of inverters has many benefits, such as modularity and redundancy. However, the parallel connection of inverters produces circulating currents that may result in malfunctions of the system. In ...
A Control Scheme without Sensors at the PV Source for Cost and Size Reduction in Two-Stage Grid Connected Inverters

González-Medina, Raúl; Liberos-Mascarell, María Antonia; Marzal Romeu, Silvia; Figueres Amorós, Emilio; Garcerá, Gabriel (MDPI AG, 2019-08-01)

[EN] In order to reduce the cost of PV facilities, the market requires low cost and highly reliable PV inverters, which must comply with several regulations. Some research has focused on decreasing the distortion of the ...
A Control Stage for Parallel-Connected Interlinking Converters in Hybrid AC-DC Microgrids

Liberos, Marian; González-Medina, Raúl; Patrao Herrero, Iván; Torán, Enric; Garcerá, Gabriel; Figueres Amorós, Emilio (Institute of Electrical and Electronics Engineers, 2023)

[EN] Having two or more interlinking converters connected in parallel in hybrid microgrids has some benefits, like modularity, flexibility, and redundancy. However, the parallelization of the inverters leads to circulating ...
A deep embedded refined clustering approach for breast cancer distinction based on DNA methylation

del Amor, Rocío; Colomer, Adrián; Monteagudo, Carlos; Naranjo Ornedo, Valeriana (Springer-Verlag, 2021-07-31)

[EN] Epigenetic alterations have an important role in the development of several types of cancer. Epigenetic studies generate a large amount of data, which makes it essential to develop novel models capable of dealing with ...
A delayed nonlinear stochastic model for cocaine consumption: Stability analysis and simulation using real data

Burgos-Simon, Clara; Cortés, J.-C.; Shaikhet, L.; Villanueva Micó, Rafael Jacinto (American Institute of Mathematical Sciences, 2021-04)

[EN] In this paper we propose a stochastic mathematical model with distributed delay in order to describe the transmission dynamics of cocaine consumption in Spain. We investigate conditions to guarantee the stability in ...
A direct method to obtain a realization of a polynomial matrix and its applications

Cantó Colomina, Rafael; Moll López, Santiago Emmanuel; Ricarte Benedito, Beatriz; Urbano Salvador, Ana María (Springer-Verlag, 2020-02-13)

[EN] In this paper we present a Silverman-Ho algorithm-based method to obtain a realization of a polynomial matrix. This method provides the final formulation of a minimal realization directly from a full rank factorization ...
A Family of Derivative Free Algorithms for Multiple-Roots of Van Der Waals Problem

Kumar, Sunil; Behl, Ramandeep; Martínez Molada, Eulalia; Mallawi, Fouad; Alharbi, Sattam (MDPI AG, 2022-03-11)

[EN] There are a good number of higher-order iterative methods for computing multiple zeros of nonlinear equations in the available literature. Most of them required first or higher-order derivatives of the involved function. ...
A fast version of 'CONTACT' for normal problem calculations

Giner Navarro, Juan; Gómez-Bosch, Jorge; Alonso, Asier; Baeza González, Luis Miguel (Elsevier, 2023-10-15)

[EN] In its different versions, the CONTACT method developed by Prof. Kalker is the primary reference in wheel-rail contact mechanics. Despite adopting simplifications associated with the elastic behaviour of the solids ...
A fluorogenic capped mesoporous aptasensor for gluten detection

Pla, Luis; Martínez-Bisbal, M.Carmen; Aznar, Elena; Sancenón Galarza, Félix; Martínez-Máñez, Ramón; Santiago Felipe, Sara (Elsevier, 2021-02-22)

[EN] Celiac disease is a complex and autoimmune disorder caused by the ingestion of gluten affecting almost 1% of global population. Nowadays an effective treatment does not exist, and the only way to manage the disease ...
A Framework Proposal for Research into Silver Labour from a Resilient Perspective

Sanchis, R.; Mula, Josefa; Marcucci, Giulio; Bevilacqua, Maurizio (Elsevier, 2021)

[EN] Currently, enterprises face changes in the labour structure, determined by demographic factors. Population ageing in Europe is a relevant issue that has to be carefully analysed to be prepared and adapt European aspects ...
A front-fixing ETD numerical method for solving jump-diffusion American option pricing problems

Company Rossi, Rafael; Egorova, Vera N.; Jódar Sánchez, Lucas Antonio (Elsevier, 2021-11)

[EN] American options prices under jump-diffusion models are determined by a free boundary partial integro-differential equation (PIDE) problem. In this paper, we propose a front-fixing exponential time differencing (FF-ETD) ...
A front-fixing method for American option pricing on zero-coupon bond under the Hull and White model

Company Rossi, Rafael; Egorova, Vera N.; Jódar Sánchez, Lucas Antonio; Peris, Jorge (John Wiley & Sons, 2022-04)

[EN] A new efficient numerical method is proposed for valuation of American option on zero-coupon bond using Hull and White model. By applying the front-fixing transformation suggested by Holmes and Yang, the original free ...
A full probabilistic analysis of a randomized kinetic model for reaction-deactivation of hydrogen peroxide decomposition with applications to real data

Cortés, J.-C.; Navarro-Quiles, A.; Romero, José-Vicente; Roselló, María-Dolores (Springer-Verlag, 2021-04-15)

[EN] The classical kinetic equation has been broadly used to describe reaction and deactivation processes in chemistry. The mathematical formulation of this deterministic nonlinear differential equation depends on reaction ...
A full-waveform airborne laser scanning metric extraction tool for forest structure modelling. Do scan angle and radiometric correction matter?

Crespo-Peremarch, Pablo; Ruiz Fernández, Luis Ángel (MDPI AG, 2020-01)

[EN] In the last decade, full-waveform airborne laser scanning (ALSFW) has proven to be a promising tool for forestry applications. Compared to traditional discrete airborne laser scanning (ALSD), it is capable of registering ...
A fuzzy appraisal model for affective agents adapted to cultural environments using the pleasure and arousal dimensions

Taverner-Aparicio, Joaquín José; Vivancos, Emilio; Botti Navarro, Vicente Juan (Elsevier, 2021-02-06)

[EN] Humans use rather vague and imprecise words to express emotions. Therefore, fuzzy logic allows computational affective models to use emotions in the same way that human beings express them. However, people from different ...
A Game for Learning How to Model in Graph Theory

Cordero Barbero, Alicia; Jordan-Lluch, Cristina; Murillo Arcila, Marina; Sanabria-Codesal, Esther (MDPI AG, 2022-06)

[EN] In this article, we show how to introduce students to modeling while exposing the power of graph theory as a modeling tool. For that purpose, we propose a problem aimed at university students based on a game where the ...