Now showing items 21-40 of 314


      Retana Montenegro, Edwin; Frutos Alfaro, Francisco (2014-07-01)
      In N-body simulations of cold dark matter, it has been found that three-parameter models, particularly the Einasto profile, yield better fits to a wide range of dark matter haloes than two parameter models like the ...

      Rosales Ortega, José (2014-07-01)
      In this article we study the basic facts about superior order G-structures, then we show that the set of infinitesimally automorphisms of a geometric G-structure is a closed Lie group. 
    • 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 ...
    • Location of police cars for public surveillance using two multicriteria models 

      García G., María J.; Hernández, Gilberto; Hernández R., José G. (2014-04-03)
      The criminal boom in some Latin-American cities obliges the increment of patrols and policemen. Sadly they do not there sufficient vehicles to locate in all the places candidates. In the location of patrols, there are many ...
    • Artificial bee colony and particle swarm optimization for the estimation of nonlinear regression parameters 

      de los Cobos Silva, Sergio Gerardo; Gutiérrez Andrade, Miguel Ángel; Rincón García, Eric Alfredo; Lara Velázquez, Pedro; Aguilar Cornejo, Manuel (2014-04-03)
      This paper shows the comparison results of ABC (Artificial Bee Colony) and PSO (Particle Swarm Optimization) heuristic tech- niques that were used to estimate parameters for nonlinear regression models. The algorithms were ...
    • GNM-NIPALS: general nonmetric-nonlinear estimation by iterative partial least squares 

      Aluja, Tomás; González, Víctor Manuel (2014-04-03)
      This paper develops GNM-NIPALS as an extension of the NM-PLS methods, which allows to quantify the qualitative variables of mixed data, by means of the reconstitution function using the first k principal com- ponents, ...
    • On the design of membranes with increasing fundamental frequency 

      González De Paz, Raúl B. (2014-04-03)
        By means of a relaxation approach, we study the shape design of a stiff inclusion with given area in a membrane in order to maximize its fun- damental frequency. As an eigenvalue control problem, the fundamental frequency ...
    • Interstatis: the statis method for interval valued data 

      Corrales, David; Rodríguez Rojas, Oldemar (2014-04-03)
      The STATIS method, proposed by L’Hermier des Plantes and Escoufier, is used to analyze multiple data tables in which is very common that each of the tables have information concerning the same set of individuals. The ...
    • Funciones regulares en el plano y operadores de Nemytskii 

      Aziz, Wadie (2014-01-01)
      En este artículo mostramos que el espacio de las llamadas funciones regularizadas definidas sobre algún rectángulo del plano es un espacio de Banach. Más aún, bajo las hipótesis adecuadas damos condición necesaria ...
    • Construction and study of local linearization adaptive codes for ordinary differential equations 

      Sotolongo Aguiar, Alina; Jiménez Sobrino, Juan Carlos (2014-04-03)
      The aim of this work is to construct adaptive integrators for ordinary differential equations based on the Local Linearization method. Different orders of the involved Padé approximation are considered and their effect ...
    • K-finite objects and decidability 

      Acuña Ortega, Osvaldo (2014-01-01)
      We study the k-finite and decidable objects in an elementary topos. We prove some results concerning k-finite and decidable objects.  
    • Challenges for statistics teaching and teacher’s training in Mexico 

      Hernández González, Sergio; Ruiz Hernández, Blanca; Pinto Sosa, Jesús E.; Albert Huerta, J. Armando (2013-08-29)
      This work will cover the problems that are found in teacher training and professional development in Probability and Statistics in higher education in Mexico. It will be approached through four focuses: a) the characterization ...
    • Dice, sticks, pixels and bits: didactic alternatives to explore the methodology of Monte Carlo in a ludic tone 

      Navone, Hugo D.; Scancich, Miriam; Zorzi, Alejandra F. (2013-08-29)
      This paper presents didactic strategies in a ludic tone to explore the methodology of Monte Carlo and analizes the implementations that have been performed in several educational scenarios. These proposals allow us to put ...
    • Simulation models generator. Applications in scheduling 

      Castrillón, Omar Danilo; Giraldo, Jaime Alberto; Sarache, William Ariel (2013-08-29)
      The aim of this study is to disseminate the academic community a prototype computer that automatically generates simulation models of a given industrial production system, in order to facilitate the learning of some ...
    • Comparative analysis of the orbital structure for non–cuspy and cuspy triaxial models of galaxies using different expansions of the gravitational potential 

      Navone, Hugo D.; Zorzi, Alejandra F. (2013-08-29)
      One way to create models of elliptical galaxies is to start from a system of particles with a suitable distribution and to follow its evolution with an N-body code until it reaches equilibrium. In previous works we used ...
    • Algoritmo de búsqueda tabú para una variante del problema de coloración 

      Aboytes Ojeda, Mario; Laureano Cruces, Ana Lilia; Ramírez Rodríguez, Javier (2013-08-29)
      El problema de coloración robusta generalizado (PCRG) resuelve problemas de horarios que consideran restricciones especiales. Al ser una generalización del problema de coloración robusta, que es a su vez una generalización ...
    • Sea level rise and the geoid: factor analysis approach 

      Sadovski, Alexey; Song, Hongzhi; Jeffress, Gary (2013-08-29)
      Sea levels are rising around the world, and this is a particular concern along most of the coasts of the United States. A 1989 EPA report shows that sea levels rose 5-6 inches more than the global average along the ...
    • General guidelines solution for linear programming with fuzzy coefficients 

      de los Cobos Silva, Sergio Gerardo; Terceño Gómez, Antonio; Gutiérrez Andrade, Miguel Ángel (2013-08-29)
      This work introduce to the Possibilistic Programming and the Fuzzy Programming as paradigms that allow to resolve problems of linear programming when the coefficients of the model or the restrictions on the same are presented ...
    • An optimization algorithm inspired by musical composition in constrained optimization problems 

      Mora Gutiérrez, Roman Anselmo; Rincón García, Eric Alfredo; Ramírez Rodríguez, Javier; Ponsich, Antonin; Herrera Alcántara, Oscar; Lara Velázquez, Pedro (2013-08-29)
      Many real-world problems can be expressed as an instance of the constrained nonlinear optimization problem (CNOP). This problem has a set of constraints specifies the feasible solution space. In the last years several ...
    • A new method for the analysis of images: the square wave method 

      Skliar, Osvaldo; Oviedo, Guillermo; Monge, Ricardo E.; Medina, Víctor; Gapper, Sherry (2013-08-29)
      The Square Wave Method (SWM) – previously applied to the analysis of signals – has been generalized here, quite naturally and directly, for the analysis of images. Each image to be analyzed is subjected to a process of ...