Now showing items 1-19 of 19

  • A fuzzy logic approach to assembly line 

    Fonseca, Daniel J.; Elam, Matthew; Karr, Charles L.; Guest, C.L. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2005)
    Article
    Open Access
    This paper deals with the use of fuzzy set theory as a viable alternative method for modelling and solving the stochastic assembly line balancing problem. Variability and uncertainty in the assembly line balancing ...
  • A hybrid evolutionary approach to intelligent system design 

    Badr, Amr; Farag, Ibrahim; Eid, Saad (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
    Article
    Open Access
    The problem of developing a general methodology for system design has always been demanding. For this purpose, an evolutionary algorithm, adapted with design-specific representation data structures is devised. The ...
  • A map characterizing the fuzzy points and columns of a T-indistinguishability operator 

    Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2005-10)
    Article
    Open Access
    A new map (ΛE) between fuzzy subsets of a universe X endowed with a T-indistinguishability operator E is introduced. The main feature of ΛE is that it has the columns of E as fixed points, and thus it provides us with a ...
  • Development of a framework for the integration of real-time data in supply chain risk management using simulation tools 

    Valero Berjaga, Alvar (Universitat Politècnica de CatalunyaTechnische Universität Dortmund, 2013)
    Bachelor thesis
    Open Access
  • Estimación holística del riesgo sísmico: nuevos enfoques 

    Carreño Tibaduiza, Martha Liliana; Cardona Arboleda, Omar Dario; Barbat Barbat, Horia Alejandro (Ediciones Uniandes, 2015)
    Conference report
    Restricted access - publisher's policy
    The fuzzy set theory offers a bridge between the symbolic and numerical processing, allowing managing qualitative concepts useful in the decision-making process related to the seismic risk management and, in general, to ...
  • FCR Method vs. IR Method: Comparative and intercultural analysis of two human behavior measurements applying extended Fuzzy Logic 

    Clavell Pi-Sunyer, Pau (Universitat Politècnica de CatalunyaAichi Institute of Technology, 2008)
    Master thesis (pre-Bologna period)
    Restricted access - confidentiality agreement
    The advanced knowledge of people’s real opinions is getting more important every day from many points of view and fields of application. The decision-making science, the improvement of market research, Marketing and ...
  • Fuzzy sets in computer vision: an overview 

    Sobrevilla Frisón, Pilar; Montseny Masip, Eduard (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2003)
    Article
    Open Access
    Every computer vision level crawl with uncertainty, what makes its management a significant problem to be considered and solved when trying for automated systems for scene analysis and interpretation. This is why fuzzy set ...
  • Fuzzy short-run control charts 

    Fonseca, D. J.; Elam, M. E.; Tibbs, L. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2007)
    Article
    Open Access
    Statistical control charts are useful tools in monitoring the state of a manufacturing process. Control charts are used to plot process data and compare it to the limits set for the process. Points plotting outside these ...
  • Integration of Graph Theory and Matrix Approach with Fuzzy AHP for Equipment Selection 

    Fathi, Mohammad Reza; Safari, Hossein; Faghih, Alireza (School of Industrial and Aeronautic Engineering of Terrassa (ETSEIAT). Universitat Politècnica de Catalunya (UPC), 2013-07)
    Article
    Open Access
    Purpose: The purpose of this paper is applying a new integrated method to equipment selection. Design/methodology/approach: In this paper, we proposed the new integrated approach. Proposed approach is based on fuzzy ...
  • Mathematical aspects of the theory of measures of fuzziness 

    Vivona, Doretta (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1996)
    Article
    Open Access
    After recalling the axiomatic concept of fuzziness measure, we define some fuzziness measures through Sugeno’s and Choquet’s integral. In particular, for the so-called “homogeneous” fuzziness measures we prove two ...
  • Mining and visualizing uncertain data objects and named data networking traffics by fuzzy self-organizing map 

    Karami, Amin; Guerrero Zapata, Manel (CEUR-WS.org, 2014)
    Conference report
    Open Access
    Uncertainty is widely spread in real-world data. Uncertain data-in computer science-is typically found in the area of sensor networks where the sensors sense the environment with certain error. Mining and visualizing ...
  • On the relationship between T-transitivity and approximate equality 

    Boixader Ibáñez, Dionís (2003-01)
    Article
    Restricted access - publisher's policy
    The paper discusses the suitability of T-transitivity for modelling approximate equality. It explains how T-transitivity, a property suitable for modelling vagueness, can still be used to handle the imprecision inherent ...
  • Ovchinnikov's automorphisms revisited 

    Trillas i Gay, Enric; Rodríguez, A.; Cubillo Villanueva, Susana (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1994)
    Article
    Open Access
    In [6] an approach to the representation of synonyms and antonyms via the automorphisms of the De Morgan Algebra [0,1] x was suggested. In [3], Ovchinnikov established a representation theorem for automorphisms of the ...
  • Profit allocation in fuzzy cooperative games in manufacturing and logistics industry 

    Wang, Xiaoyan; Jiang, Liqi; Shu, Lei (OmniaScience, 2014-05)
    Article
    Open Access
    Purpose: Alliance between manufacturing and logistics industry is a new model of the joint development of the two industries. A reasonable profit allocation mechanism is the key to ensure the stable operation of the alliance, ...
  • Similarity in fuzzy reasoning 

    Klawonn, Frank; Castro Peña, Juan Luis (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1995)
    Article
    Open Access
    Fuzzy set theory is based on a `fuzzification' of the predicate in (element of), the concept of membership degrees is considered as fundamental. In this paper we elucidate the connection between indistinguishability modelled ...
  • Testing satistical hipotheses in fuzzy environment 

    Gregorzewski, Przemyslaw; Hryniewicz, Olgierd (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1997)
    Article
    Open Access
    In traditional statistics all parameters of the mathematical model and possible observations should be well defined. Sometimes such assumption appears too rigid for the real-life problems, especially while dealing ...
  • The logistic decision making in management accounting with genetic algoritms and fuzzy sets 

    López González, Enrique; Rodríguez-Fernández, M. Ángel; Mendaña Cuervo, Cristina (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2000)
    Article
    Open Access
    The logistics problems in business environments deal with assignation from a number of sources to a number of destinations. Each source offers amounts of goods, while each destination demands quantities of these goods. The ...
  • Transitive closure and betweenness relations 

    Boixader Ibáñez, Dionís; Jacas Moral, Juan; Recasens Ferrés, Jorge (2001-06)
    Article
    Restricted access - publisher's policy
    Indistinguishability operators fuzzify the concept of equivalence relation and have been proved a useful tool in theoretical studies as well as in di0erent applications such as fuzzy control or approximate reasoning. One ...
  • Vagueness and its representations: a unifying look 

    Wygralak, Maciej (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1998)
    Article
    Open Access
    Using the notion of a vaguely defined object, we systematize and unify different existing approaches to vagueness and its mathematical representations, including fuzzy sets and derived concepts. Moreover, a new, approximative ...