Listar Revista de Matemática: Teoría y Aplicaciones por título
Mostrando ítems 290-309 de 319
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The multiplicative products between the Distribution (P ± i0)^{\lambda} and the Operators L^r{\delta} and K^r{\delta}
(2012-03-29)In this note we give a sense to some multiplicative products of distributions:i) (P ± i0)^{\lambda} . L^r {\delta}ii) (P± i0) ^{\lambda} . K^r{\delta }where (P ± i0)^{\lambda} is the distribution defined by the formula ... -
The role of short-term immigration on disease dynamics: An SIR model with age-structure
(2019-02-18)We formulate an age-structured nonlinear partial differential equation model that features short-term immigration effects in a population. Individuals can immigrate into the population as any of the three stages in the ... -
The traveling salesman problem: a deterministic algorithm using tabu search
(2014-04-03)We implement an algorithm corresponding to the Taboo Search method, called EraDeterministic, experimenting with the basic algorithm that ex- plores the search space and incorporating the diversification as strategy to ... -
The use of multilayer perceptrons for statistical modeling SO_2 non linear time series in Salta Capital, Argentina
(2013-04-04)In this paper a statistical study of phisical-chemistry variables connected with enviroment pollution, specifically SO2 monthly average concentration, measured in Salta Capital city, Argentina, together with NO2 and O3 ... -
Time-frequency methods based on the wavelet transform
(2012-07-01)The information contained in an analog signal is reveled by its numerical representation. The Fourier pair, in two complementary representations, expounds time and frequency structures. However, to detect and characterize ... -
Times of analgesic efficacy of two drugs in the treatment of patients with renal-ureteral colic compared by survival models
(2015-01-01)Renourethral colic is a very painful clinical situation that requires a quick diagnosis and treatment. A study was done with patients who were administered two types of analgesics, and whose pain was measured through a ... -
Transmission dynamics of Dengue in Costa Rica: The role of hospitalizations
(2019-12)For decades, dengue virus has caused major problems for public health officials in tropical and subtropical countries around the world. We construct a compartmental model that includes the role of hospitalized individuals ... -
Triángulos casi congruentes
(2012-03-29)En este artículo se estudian los triángulos casi congruentes, que consisten en las parejas de triángulos que tienen exactamente 5 de sus 6 elementos congruentes. Se caracterizan todas las soluciones enteras a este problema. ... -
Ttsunami. An Interesting Mathematical Problem
(2012-03-12)We present some key aspects regarding the mathematics and the computational tool that support the complex description of the physical process tsunami from two specific approaches. In particular, it addresses analytically ... -
Ultraproductos de f-anillos proyectables
(2009-02-18)In [7], Keimel representes the projectable f-rings as continuous sections of Hausdorff sheaves of totally ordered rings. Here, we give a result about the representation of ultraporducts of projectable f-rings in terms of ... -
Un Algoritmo Evolutivo para Resolver el Problema de Coloración Robusta
(2012-03-22)Let G and \bar{G} be two complementary graphs. Given a penalty function defined over the edges of \bar{G}, it is said that the rigidity of a k-coloring of G is the summation ofthe penalties of the edges of G that join ... -
Un algoritmo para el entrenamiento de máquinas de vector soporte para regresión
(2009-02-19)The aim of the present paper is twofold. Firstly an introduction to the ideas of Support Vector regression is given. then a new and simple algorithm, suggested by the work of Campbell y Cristianini in [16], is proposed ... -
Un algoritmo paralelo para el problema del conjunto independiente
(2009-02-19)Un conjunto S de vértices de una gráfica G es independiente si no existen dos vértices de S que sean adyacentes, esto es, la subgráfica de G inducida por S no tiene aristas. En este trabajo presentaremos un algoritmo ... -
Un análisis factorial de la asociación disimétrica entre dos variables cualitativas
(2012-03-29)Asymmetrical “relational association coefficients” are described. Measurements of these coefficients are expressed as inertia in the individual–space with a “relational inner product”. This geometrical and mechanical point ... -
Un enfoque diferente de las técnicas de clustering para el estudio de epidemias
(2009-02-18)Classification of an outbreak with the category of epidemics requires that some epidemiological and statistical parameters, which have to be studied simultaneously, are satisfied; mathematical theory helps epidemiologists ... -
Un frailty aditivo en modelos de supervivencia bivariante
(2009-02-18)Bivariate survival models based on the presence of an unobseved random covariate, grailty, tend to assume a proportional hazard hypothesis. A bivariate survival model is constructed. It is based on frailty model that acts ... -
Un método para la caracterización exhaustiva de formas de figuras planas, tanto simple como múltiplemente conexas
(2009-02-20)This article presents a method with which the shapes of plane figures may becharacterized exhaustively by using descriptive mathematical entities obtained fromthese figures. They may be either simply or multiply connected. ... -
un modelo de equilibrio para economías de producción con análisis de actividad
(2009-02-20)In this paper we study a general equilibrium model for economies with activitiesanalysis production technologies and we prove a global index theorem for regulareconomies.Keywords: Regular economy, economic equilibrium, ... -
Un Modelo Matemático para la bola de Fútbol
(2012-03-01)This work refers to the analysis, study and resolution of the mathematical problem involved in the design and construction of the cover of a ball, such as the ones used in sports, in order to achieve a ball with optimal ... -
Un problema de localización de plantas de gran escala
(2009-02-19)En este artículo se desarrolla un algoritmo heurístico y su correspondiente implementación para resolver un problema de localización de plantas (facility location) de gran escala, en donde surgen potencialmente más de 640 ...