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Browsing by UPV Unit "Universitat Politècnica de València. Departamento de Matemática Aplicada - Departament de Matemàtica Aplicada"

Now showing items 21-40 of 2507

A class of optimal eighth-order derivative-free methods for solving the Danchick-Gauss problem

Andreu Estellés, Carlos; Cambil Teba, Noelia; Cordero Barbero, Alicia; Torregrosa Sánchez, Juan Ramón (Elsevier, 2014-04-01)

A derivative-free optimal eighth-order family of iterative methods for solving nonlinear equations is constructed using weight functions approach with divided first order differences. Its performance, along with several ...
A class of polynomial planar vector fields with polynomial first integral

Ferragut, Antoni; Galindo Pastor, Carlos; Monserrat Delpalillo, Francisco José (Elsevier, 2015-10-01)

We give an algorithm for deciding whether a planar polynomial differential system has a first integral which factorizes as a product of defining polynomials of curves with only one place at infinity. In the affirmative ...
A class of Steffensen type methods with optimal order of convergente

Cordero Barbero, Alicia; Torregrosa Sánchez, Juan Ramón (Elsevier, 2011-06-01)

In this paper, a family of Steffensen type methods of fourth-order convergence for solving nonlinear smooth equations is suggested. In the proposed methods, a linear combination of divided differences is used to get a ...
A clinically-oriented computer model for radiofrequency ablation of hepatic tissue with internally cooled wet electrode

Ewertowska, Elzbieta; Quesada-Diez, Rita; Radosevic, A.; Andaluz, Anna; Moll, Xavier; García Arnás, F.; Berjano, Enrique; Burdío Pinilla, Fernando; Trujillo Guillen, Macarena (Taylor & Francis, 2019)

[EN] Purpose: To improve the computer modelling of radiofrequency ablation (RFA) by internally cooled wet (ICW) electrodes with added clinically oriented features. Methods: An improved RFA computer model by ICW electrode ...
A code to calculate high order legendre polynomials and functions

Selezneva, I. A.; Ratis, Yuri L.; Hernández, Eugenio; Pérez Quiles, María Jezabel; Fernández de Córdoba, Pedro (ACCEFYN - Academia Colombiana de Ciencias Exactas, Fisicas y Naturales, 2013)

[EN] In this paper we present, with a pedagogical aim, a method to calculate the associated Legendre functions and polynomials. The method uses stable recurrence relations involving these functions.
A combined multi-criteria approach to support FMECA analyses: a real-world case

Carpitella, Silvia; Certa, A.; Izquierdo Sebastián, Joaquín; La Fata, C. M. (Elsevier, 2018)

[EN] The paper proposes an approach that combines reliability analyses and multi-criteria decision methods to optimize maintenance activities of complex systems. A failure mode, effects, and criticality analysts (FMECA) ...
A comparative study to the numerical approximation of random Airy differential equation

Cortés López, Juan Carlos; Jódar Sánchez, Lucas Antonio; Romero Bauset, José Vicente; Roselló Ferragud, María Dolores (Elsevier, 2011-11)

The aim of this paper is twofold. First, we deal with the extension to the random framework of the piecewise Fröbenius method to solve Airy differential equations. This extension is based on mean square stochastic calculus. ...
A comparison of different techniques for simulating and measuring acoustic parameters in a place of worship: Sant Jaume Basilica in Valencia, Spain

Segura Garcia, Jaume; Giménez Pérez, Alicia; Romero Faus, José; Cerdá Jordá, Salvador (Hirzel Verlag (S. Hirzel Verlag), 2011-01)

The study of rooms devoted to sound transmission has become a discipline in which all the fundamentals areas of current scientific research in acoustics converge. To demonstrate how this convergence arises in this work, ...
A comparison of machine learning classifiers for leak detection and isolation in urban networks

Carreño-Alvarado, Elizabeth P.; Reynoso-Meza, Gilberto; Montalvo, Idel; Izquierdo Sebastián, Joaquín (International Center for Numerical Methods in Engineering (CIMNE), 2017-07-05)

[Otros] Leak detection and isolation (LDI) is a problem of interest for water management companies and their technical staff. Main reasons for this are that early detection of leakages can reduce dramatically (1) water ...
A comparison of two different formulations for Arc Routing Problems on Mixed graphs

Corberán, A.; Mota, E.; Sanchís Llopis, José María (Elsevier, 2006-12)

[EN] Arc routing problems on mixed graphs have been modelled in the literature either using just one variable per edge or associating to each edge two variables, each one representing its traversal in the corresponding ...
A comprehensive probabilistic analysis of SIR-type epidemiological models based on full randomized Discrete-Time Markov Chain formulation with applications

Cortés, J.-C.; El-Labany, S.K.; Navarro-Quiles, A.; Selim, Mustafa M.; Slama, H. (John Wiley & Sons, 2020-09-30)

[EN] This paper provides a comprehensive probabilistic analysis of a full randomization of approximate SIR-type epidemiological models based on discrete-time Markov chain formulation. The randomization is performed by ...
A comprehensive probabilistic solution of random SIS-type epidemiological models using the Random Variable Transformation technique

Casabán, M.C.; Cortés, J.-C.; Navarro-Quiles, A.; Romero, José-Vicente; Roselló, María-Dolores; Villanueva Micó, Rafael Jacinto (Elsevier, 2016)

[EN] This paper provides a complete probabilistic description of SIS-type epidemiological models where all the input parameters (contagion rate, recovery rate and initial conditions) are assumed to be random variables. By ...
A computational technique to predict the level of glucose of a diabetic patient with uncertainty in the short term

Burgos Simon, Clara; Cervigón, Carlos; Hidalgo, José-Ignacio; Villanueva Micó, Rafael Jacinto (John Wiley & Sons, 2019)

[EN] On advanced stages of the disease, diabetic patients have to inject insulin doses to maintain blood glucose levels inside of a healthy range. The decision of how much insulin is injected implies somehow to predict the ...
A consistent stable numerical scheme for a nonlinear option pricing model in illiquid markets

Company Rossi, Rafael; Jódar Sánchez, Lucas Antonio; Pintos Taronger, José Ramón (Elsevier, 2012-06)

Markets liquidity is an issue of very high concern in financial risk management. In a perfect liquid market the option pricing model becomes the well-known linear Black-Scholes problem. Nonlinear models appear when transaction ...
A convex combination approach for mean-based variants of Newton's method

Cordero Barbero, Alicia; Franceschi, Jonathan; Torregrosa Sánchez, Juan Ramón; Zagati, Anna C. (MDPI AG, 2019-09-02)

[EN] Several authors have designed variants of Newton¿s method for solving nonlinear equations by using different means. This technique involves a symmetry in the corresponding fixed-point operator. In this paper, some ...
A cutting plane algorithm for the General Routing Problem

Corberan, Angel; Letchford, Adam; Sanchís Llopis, José María (Springer-Verlag, 2001)

[EN] The General Routing Problem (GRP) is the problem of finding a minimum cost route for a single vehicle, subject to the condition that the vehicle visits certain vertices and edges of a network. It contains the Rural ...
A description based on languages of the final non-deterministic automaton

Ballester-Bolinches, A.; Cosme-Llopez, E; Esteban Romero, Ramón (Elsevier, 2014-05-29)

The study of the behaviour of non-deterministic automata has traditionally focused on the languages which can be associated to the different states. Under this interpretation, the different branches that can be taken at ...
A discrete mathematical model for addictive buying: Predicting the affected population evolution

García Ureta, Irene; Jódar Sánchez, Lucas Antonio; Merello Giménez, Paloma; Santonja, Francisco-José (Elsevier, 2011-10)

This paper deals with the construction of a discrete mathematical model for addictive buying. Firstly, identifications of consumers buying behavior are performed by using multivariate statistical techniques based on real ...
A domain-theoretic approach to fuzzy metric spaces

Ricarte Moreno, Luis Alberto; Romaguera Bonilla, Salvador (Elsevier, 2014-02)

We introduce a partial order (sic)(M) on the set BX of formal balls of a fuzzy metric space (X, M, Lambda) in the sense of Kramosil and Michalek, and discuss some of its properties. We also characterize when the poset (BX, ...
A dynamic trading rule based on filtered flag pattern recognition for stock market price forecasting

Arévalo, Rubén; García, Jorge; Guijarro, Francisco; Peris Manguillot, Alfredo (Elsevier, 2017)

[EN] In this paper we propose and validate a trading rule based on flag pattern recognition, incorporating im- portant innovations with respect to the previous research. Firstly, we propose a dynamic window scheme that ...