Now showing items 275-294 of 312

    • TABU SEARCH WITH ASPIRATION CRITERION FOR THE TIMETABLING PROBLEM 

      Chávez Bosquez, Oscar; Pozos Parra, Pilar; Gómez Ramos, José Luis (2015-01-01)
      The aspiration criterion is an imperative element in the Tabu Search, with aspiration-by-default and the aspiration-by-objective the mainly used criteria in the literature. In this paper a new aspiration criterion is ...
    • Teoría de nudos geométricos e isotopía poligonal 

      Calvo Soto, Jorge Alberto (2009-02-19)
      The space of n-sided polygons embedded in euclidean three-space consists of a smoothmanifold in which points correspond to piecewise linear or “geometric” knots, while pathscorrespond to isotopies which preserve the geometric ...
    • Term Structure of Interest Rates 

      Stradi, Benito A. (2012-03-02)
      The risk free rate on bonds is a very important quantity that allows calculation of premium values on bonds. This quantity of stochastic nature has been modeled with different degrees of sophistication. This paper reviews ...
    • The Black-Scholes type financial models and the arbitrage opportunities 

      Sukhomlin, Nikolay (2009-02-25)
      By using the conservation laws concept, we study certain financial models similar tothe Black–Scholes model. We show that without complement limitations such modelscan have two or more volatilities. This fact imposes several ...
    • The BPS preconditioner on Beowulf cluster 

      Salas Huertas, Oscar; Marazzina, Daniele; Rovida, Sergio; Sacchi, Giovanni; Scacchi, Simone (2009-02-27)
      This work presents the implementation on a Linux Cluster of a parallel preconditionerfor the solution of the linear system resulting from the finite element discretizationof a 2D second order elliptic boundary value problem. ...
    • The Combinatorial ANT System for Dynamic Combinatorial Optimization Problems 

      Aguilar, Jose (2012-03-22)
      In this paper is presented a distributed algorithm based on Ant System concepts,called Combinatorial Ant System, to solve dynamic combinatorial optimization problems. Our approach consists of mapping the solution space of ...
    • The Decreasing digits and the a, b, c Model: A Proposal for Handling Populations in Shelters 

      García G., María J.; Hernández R., José G.; Hernández G., Gilberto J. (2011-03-18)
      Happened a catastrophe, some one of the impacted population should their move from its homes, toward refuges or shelters. To guarantee the essential services in the shelter, it is necessary to know the population size that ...
    • The Determinant of Matching Matrix in the Evaluation of Matching Polynomial 

      Wahid, Shanaz A. (2011-04-29)
      A characterization is given for graphs whose matching polynomial is the determinant of their matching matrices. The matching matrix is then modified and its relation with other graph polynomials is examined.
    • The Hankel transform of causal distributions 

      Aguirre T., Manuel A. (2012-03-29)
      In this note we evaluate the unidimensional distributional Hankel transform of \dfrac{x^{\alpha-1}_{+}}{\Gamma^{\alpha}},\dfrac{x^{\alpha-1}_{-}}{\Gamma^{\alpha}},dfrac{|x|^{\alpha-1}}{\Gamma^{\frac{\alpha}{2}}},dfrac{|x ...
    • The multiplicative products between the Distribution (P ± i0)^{\lambda} and the Operators L^r{\delta} and K^r{\delta} 

      Aguirre T., Manuel A. (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 

      Sánchez Peña, Fabio Ariel; Calvo Alpízar, Juan Gabriel (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 

      López, Erasmo; Salas Huertas, Oscar; Murillo Fernández, Álex (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 

      Musso, Haydeé Elena; Ávila Blas, Orlando José (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 

      Serrano, Eduardo P.; Fabio, Marcela; Figliola, Alejandra (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 

      Reyes Velázquez, Luis; Ulín Montejo, Fidel; Pérez Chavez, Jorge Alejandro; Salinas Hernández, Rosa María; Torres López, Jorge Elías (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 ...
    • Triángulos casi congruentes 

      Piza Volio, Eduardo (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 

      González González, Rodrigo; Ortiz Figueroa, Modesto; Montoya Rodríguez, José Miguel (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 

      Guier Acosta, Jorge Ignacio (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 

      Lara Velázquez, Pedro; Gutiérrez Andrade, Miguel Ángel; Ramírez Rodríguez, Javier; López Bracho, Rafael (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 

      Goddard Close, John; de los Cobos Silva, Sergio Gerardo; Pérez Salvador, Blanca Rosa; Gutiérrez Andrade, Miguel Ángel (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 ...