Listar por departamento/instituto "Matemática Aplicada"
Mostrando ítems 1-20 de 315
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2D GPU-based HySEA model for tsunami simulation. Some practical examples.
González-Vida, José Manuel
; Castro-Díaz, Manuel Jesús; Macías-Sánchez, Jorge; De la Asunción, Marc; Ortega, Sergio; Sánchez-Linares, Carlos[et al.] (2014-07-11)
A two-waves TVD-WAF type scheme for solving 2D shallow-water equation is considered together with a first and second order HLL scheme. Comparison among the different schemes will be performed to check the performance for ... -
A conversational recommender system for diagnosis using fuzzy rules.
Cordero-Ortega, Pablo; Enciso-García-Oliveros, Manuel; López-Rodríguez, Domingo; Mora-Bonilla, Ángel (Elsevier, 2020-09-15)
Graded implications in the framework of Fuzzy Formal Concept Analysis are used as the knowledge guiding the recommendations. An automated engine based on fuzzy Simplification Logic is proposed to make the suggestions to ... -
A Curvature Inequality Characterizing Totally Geodesic Null Hypersurfaces
Olea-Andrades, Benjamín (Springer, 2023)
A well-known application of the Raychaudhuri equation shows that, under geodesic completeness, totally geodesic null hypersurfaces are unique which satisfy that the Ricci curvature is nonnegative in the null direction. ... -
A discrete-time queue with service time adjustments and general retrial times.
Atencia-McKillop, Iván; Galán-García, José Luis; Padilla-Domínguez, Yolanda Carmen; Rodríguez-Cielos, Pedro (Elsevier, 2025-03-05)
This paper examines a discrete-time retrial queueing system where incoming customers can either choose a last-come, first-served (LCFS) discipline or enter an orbit. It accounts for the possibility of varying service times, ... -
A discrete-time queueing system with three different strategies
Atencia-McKillop, Iván; Padilla-Domínguez, Yolanda Carmen; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodríguez-Cielos, Pedro; Galán-García, María Ángeles[et al.] (Elsevier, 2021-09)
We consider a discrete-time Geo/G/1/inf system in which a customer that finishes its first essential service may opt to abandon the system, to receive a second optional service or to go at the head of the queue in order ... -
A discrete-time retrial queueing system with changes in the service times and retrial times.
Atencia-McKillop, Iván; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Galán-García, María Ángeles; Rodríguez-Cielos, Pedro; Padilla-Domínguez, Yolanda Carmen; Rodríguez-Padilla, Pablo[et al.] (2024)
This paper investigates a discrete-time retrial queueing system wherein arriving customers can choose between adopting a Last-Come-First-Served (LCFS) discipline or joining the orbit. The potential variability in service ... -
A Discrete-Time retrial queueing system with service upgrade
Fortes-Ruiz, Inmaculada; Sánchez, Sixto; Atencia-McKillop, Iván (2015-06-10)
We study the Markov chain underlying the considered queueing system obtaining the gen- erating function of the number of customers in the orbit and in the system as well as the stationary distribution of the time that a ... -
A discrete-time system with uncertainty information
Atencia-McKillop, Iván; Fortes-Ruiz, Inmaculada; Sánchez, Sixto (2017-02-14)
This paper considers a discrete-time queueing system with uncertainty information, that is, an arriving customer may opt, with a certain probability, to be served under a Last Come First Served (LCFS) discipline or, with ... -
A family of Dirichlet Morrey spaces.
Galanopoulos, Petros; Merchán-Álvarez, Noel; Siskakis, Aristomenis G. (Taylor & Francis, 2019-02-03)
To each weighted Dirichlet space D_p, 0<p<1, we associate a family of Morrey-type spaces D_{λ,p}, 0<λ<1, constructed by imposing growth conditions on the norm of hyperbolic translates of functions. We indicate some of the ... -
A flexible logic-based approach to closeness using order of magnitude qualitative reasoning.
Burrieza-Muñiz, Alfredo; Muñoz-Velasco, Emilio José; Ojeda-Aciego, Manuel (Oxford Academic, 2020)
In this paper, we focus on a logical approach to the important notion of closeness, which has not received much attention in the literature. Our notion of closeness is based on the so-called proximity intervals, which will ... -
A Formal Concept Analysis approach to hierarchical description of malware threats
Ojeda Hernández, Manuel; López-Rodríguez, Domingo; Mora, Angel (2024-07-04)
The problem of intelligent malware detection has become increasingly relevant in the industry, as there has been an explosion in the diversity of threats and attacks that affect not only small users, but also large ... -
A general vertical decomposition of Euler equations: Multilayer-moment models
Garres-Díaz, José; Escamilla-Sánchez, Alejandro; Morales-de-Luna, Tomás; Castro-Díaz, Manuel Jesús (Elsevier, 2022-09-13)
In this work, we present a general framework for vertical discretizations of Euler equations. It generalizes the usual moment and multilayer models and allows to obtain a family of multilayer-moment models. It considers a ... -
A generalized framework to consider positive and negative attributes in formal concept analysis
Rodríguez Jiménez, José Manuel; Cordero-Ortega, Pablo; Enciso-García-Oliveros, Manuel; Mora-Bonilla, Ángel (2014-10-23)
In Formal Concept Analysis the classical formal context is analized taking into account only the positive information, i.e. the presence of a property in an object. Nevertheless, the no presence of a property in an object ... -
A generalized Hilbert operator acting on conformally invariant spaces
Girela-Álvarez, Daniel; Merchán-Álvarez, Noel (Springer Basel AG, 2018)
If μ is a positive Borel measure on the interval [0,1), we let H_μ be the Hankel matrix with entries μ_{n,k}=μ_{n+k}, where μ_n denotes the moment of order n of the measure μ. This matrix formally induces an operator on ... -
A Genetic Algorithm and an Exact Algorithm for Classifying the Items of a Questionnaire Into Different Competences
Galán-García, José Luis; Merino-Córdoba, Salvador; Martínez-del-Castillo, Javier; De-Aguilera-Moyano, Miguel (2014-07-16)
A Likert scale is a psychometric response scale primarily used in questionnaires to obtain participant's preferences or degree of agreement with a statement or set of statements. Respondents are asked to indicate their ... -
A Geo[X]/G[X]/1 retrial queueing system with removal work and total renewal discipline
Atencia-McKillop, Iván; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodríguez-Cielos, Pedro; Galán-García, María Ángeles (Elsevier, 2018-02)
In this paper we consider a discrete-time retrial queueing system with batch arrivals of geometric type and general batch services. The arriving group of customers can decide to go directly to the server expelling out of ... -
A Hankel matrix acting on spaces of analytic functions.
Girela-Álvarez, Daniel; Merchán-Álvarez, Noel (Springer, 2017-11-02)
If μ is a positive Borel measure on the interval [0, 1) we let H_μ be the Hankel matrix { μ_{n,k} }_{n,k} with entries μ_{n,k} =μ_{n+k}, where, for μ_n denotes the moment of order n of μ. This matrix induces formally an ... -
A high dimensional functional time series approach to evolution outlier detection for grouped smart meters
Elías Fernández, Antonio; Morales-González, Juan Miguel; Pineda-Morente, Salvador (Taylor and Francis, 2022-01-01)
Smart metering infrastructures collect data almost continuously in the form of fine-grained long time series. These massive data series often have common daily patterns that are repeated between similar days or seasons and ... -
A HLLC scheme for Ripa model
Sánchez-Linares, Carlos; Morales de Luna, Tomás; Castro-Díaz, Manuel Jesús (Elsevier, 2016-01-01)
We consider the one-dimensional system of shallow-water equations with horizontal temperature gradients (the Ripa system). We derive a HLLC scheme for Ripa system which falls into the theory of path-conservative approximate ... -
A library in CoCoA for implementing railway interlocking systems.
Hernando-Esteban, Antonio; Galán-García, José Luis; Padilla-Domínguez, Yolanda Carmen; Galán-García, María Ángeles (Elsevier, 2025)
In this paper, we propose a user-friendly library in CoCoA to address and completely resolve the challenges posed by the highly efficient and intriguing mathematical model introduced in Hernando et al., (2023) for implementing ...