Now showing items 181-200 of 312

    • MATHEMATICAL MODEL FOR TOXIN TRANSPORT IN A MARINE FOOD CHAIN 

      Arbeláez A., Daniel; Ruiz V., Jorge Mauricio (2014-07-01)
      Some cases of poisoning by consumption of contaminated fish, like the Ciguatera poisoning, occur unexpectedly and they are not easy to detect previously since the fish that carry the toxin do not have appearance and/or ...
    • Metodología estadística: bases para el establecimiento de políticas adecuadas para el manejo del arbolado urbano en la Ciudad de México 

      Aldama Ojeda, Alejandro; Vázquez, Héctor J.; Grabinsky, Jaime; Chacalo, Alicia (2009-02-20)
      An Exploratory analysis using arboricultural and ecological statistical approachesof a representative sample of Mexico City’s street trees were followed by a confirmatorystudy through Path Analysis to test hypothesis stating ...
    • Método de Karmarkar 

      Ávila Herrera, Juan Félix (2012-03-21)
      This is the first of a series of two articles in wich we study the Karmarkar’sAlgorithm.In this article we present a new approach that will be called the Karmarkar’s method. We intent to present a version of this algorithm ...
    • Método heurístico para particionamiento óptimo 

      de los Cobos Silva, Sergio Gerardo; Trejos Zelaya, Javier; Pérez Salvador, Blanca Rosa; Gutiérrez Andrade, Miguel Ángel (2009-02-20)
      Many data analysis problems deal with non supervised partitioning of a data set,in non empty clusters well separated between them and homogeneous within the clusters.An ideal partitioning is obtained when any object can ...
    • Métodos de optimización del stress. Comparaciones usando disimilitudes tipo intervalo 

      Castillo Elizondo, William; González, Jorge; Rodríguez Rojas, Oldemar (2009-02-20)
      By the use of simulated annealing it is defined the algorithm MDSI-SS for the optimization of Stress defined by Donoeux and Masson [6] for interval-type dissimilarities.On three data sets it is compared the value of stress ...
    • Métodos de punto interior para optimización cuadrática convexa con matrices no definidas positivas 

      Palencia F., Gonzalo; Hing C., Rosina; Rojas C., Mariledy; Medina S., Denysde (2009-02-25)
      In this article a modification of the recursive algorithm of Cholesky is obtainedthat allows the factorization of Semi Definite Positive Matrices, even though theseare not positive defined, without increasing the computational ...
    • Métodos de superficie Multirespuesta: Un Estudio Comparativo 

      de la Vara Salazar, Román; Domínguez Domínguez, Jorge (2011-04-29)
      The simultaneous optimization problem may not to have a complete satisfactory solution from the point of view of the individual responses, in the sense that individual optimums are different respect to global optimum; but ...
    • Métodos no estándar en el problema de la parada óptima 

      Lobo Segura, Jaime (2009-02-18)
      We analize the optimal-stopping ploblem by the use of non standard analysis techniques. Using the non standard concept of quasi-optimal time, we prove the existence of optimal times for the problems of finite and infinite ...
    • Minimal Reducts with Grasp 

      Mendez Gurrola, Iris Iddaly; Laureano Cruces, Ana Lilia; Ramírez Rodríguez, Javier (2011-03-18)
      The proper detection of patient level of dementia is important to offer the suitable treatment. The diagnosis is based on certain criteria, reflected in the clinical examinations. From these examinations emerge the limitations ...
    • Minimization of the first eigenvalue in problems involving the bi-laplacian 

      Anedda, Claudia; Cuccu, Fabrizio; Porru, Giovanni (2009-02-27)
      This paper concerns the minimization of the first eigenvalue in problems involvingthe bi-Laplacian under either homogeneous Navier boundary conditions or homogeneousDirichlet boundary conditions. Physically, in case of N ...
    • Mmds and 2d scattering problem by cylindrical structure with piece-wise smooth boundary 

      Anyutin, Alexander P.; Stasevich, V.I. (2009-02-20)
      An universal modification of the method of discrete sources (MMDS) was appliedfor solving 2D Dirichlet or Neumann boundary problem when the scatterer’s contour isa piece-wise smooth contour. The problems of accuracy, ...
    • Modeling genetic algorithms with interacting particle systems 

      Del Moral, P.; Kallel, L.; Rowe, J. (2009-02-19)
      We present in this work a natural Interacting Particle System (IPS) approach formodeling and studying the asymptotic behavior of Genetic Algorithms (GAs). In thismodel, a population is seen as a distribution (or measure) ...
    • Modelo Multifractal Aplicado al Riego 

      Mercado Escalante, José Roberto; Aldama R., Álvaro Alberto; Íñiguez C., Mauro; Mejía G., Miguel Ángel (2012-03-02)
      We define the binomial multifractal distribution as an expression of a law of small numbers. We studied a form of evaluation or design of a distribution system in an irrigation district by determining its conduction capacity ...
    • Modelos aditivos y multiplicativos en el análisis de matrices multitrazos - multimétodos de cuestionarios de intereses profesionales 

      Ruhel, Jacques; Marivain, Thierry (2009-02-18)
      The psychologist needs the evaluation of the conceptual validity (convergent and discriminant) of psychological constructions, used for describing and explaining the organization of his observations. In this work, we ...
    • Modelos minimales de la recta hiperreal 

      Alvarado Jiménez, William (2009-02-18)
      A new proof of the existence of minimal models of the hiperreal line is obtained in terms of a combinatorial property of Ramsey ultrafilters over a countable set.
    • MORTALITY AMONG YOUNG NICARAGUAN IMMIGRANTS TO COSTA RICA: AN APPLICATION OF GEOGRAPHICALLY WEIGHTED STATISTICAL REGRESSION 

      Bonilla Carrión, Roger E.; Chavarría, Juan B. (2014-07-01)
      This paper applies a geographically weighted statistical regression (GWR) model to young Nicaraguan immigrant homicides in Costa Rica during the period 1998-2008 and identifies possible covariates. The pa- rameters for the ...
    • Nautelia: sistema automatizado para el ruteo náutico meteorológico 

      Cordero Hernández, Yovany; Fernández Castillo, Karelia; Baguer Díaz-Romañach, Marta L.; Calnick, Anneris; Borrajeros, Israel (2009-02-25)
      For the captain of a ship, it is very important to have a proposal of the routethat allows him to reach the desired destiny as soon as possible, taking into accountweather conditions. In order to find such a route a former ...
    • New geometrical compactness measures for zones design 

      Rincón García, Eric Alfredo; Gutiérrez Andrade, Miguel Ángel; de los Cobos Silva, Sergio Gerardo; Lara Velázquez, Pedro (2012-07-01)
      The design of compact zones has been studied because of its influence in the creation of zones with regular forms, which are easier to analyze, to investigate or to administer. This paper propose a new method to measure ...
    • New results with scatter search applied to multiobjective combinatorial and nonlinear optimization problems 

      Beausoleil, Ricardo P. (2009-02-20)
      This paper introduces two variants of a multiple criteria scatter search to deal withnonlinear continuous and combinatorial problems, applying a tabu search approach asa diversification generator method. Frequency memory ...
    • NONLINEAR FILTERS TO RECONSTRUCT ELECTROCARDIOGRAM SIGNALS 

      Infante, Saba; Sánchez, Luis; Cedeño, Fernando (2014-07-01)
      ECG signals have been used in cardiac pathology to detect disease heart. The main objective of this paper is to propose signal filtering techniques to reduce noise, extract information, to reconstruct the states and ...