Now showing items 1-20 of 21

    • A flexible fuzzy inductive reasoning approach for load modelling able to cope with missing data 

      Jurado Gómez, Sergio; Nebot Castells, M. Àngela; Múgica Álvarez, Francisco (Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering (ICST), 2015)
      Conference report
      Open Access
      Load forecasting in buildings and homes has been in recent years a task of increasing importance. New services and functionalities can be offered in the home environment due to this predictions, for instance, the detection ...
    • Adaptive generation of multilingual questions and answers from web content 

      Gatius Vila, Marta (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Open Access
      This article describes the adaptive generation of questions and answers from web content to assist the user when searching for information. The approach proposed integrates user models, domain-restricted knowledge ...
    • Border algorithms for computing Hasse diagrams of arbitrary lattices 

      Balcázar Navarro, José Luis; Tirnauca, Cristina (Springer, 2011)
      Conference report
      Restricted access - publisher's policy
      Lattices are mathematical structures with many applications in computer science; among these, we are interested in fields like data mining, machine learning, or knowledge discovery in databases. One well-established use ...
    • Coherence principles for handling qualitative and quantitative partial probabilistic assessments 

      Coletti, Giulianella (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1996)
      Article
      Open Access
      In this paper we present an overview of mathematical models for handling partial entailments and their extensions in a probabilistic frame.
    • Diagramas Informáticos Aplicados a Diseño y Arquitectura 

      Puig Costa, Janina; Ribó Ventura, José Oriol (International Institute on Informatics and Sistemics IIIS, 2009)
      Conference report
      Open Access
      Este artículo pretende ofrecer argumentos reflexivos acerca del impacto producido por el incipiente uso de diagramas informáticos en los procesos de diseño y el carácter retroactivo de los mismos con el producto acabado. En ...
    • FELLA: an R package to enrich metabolomics data 

      Picart Armada, Sergio; Fernández Albert, Francesc; Vinaixa, Maria; Yanes, Óscar; Perera Lluna, Alexandre (2018-12-22)
      Article
      Open Access
      Background: Pathway enrichment techniques are useful for understanding experimental metabolomics data. Their purpose is to give context to the affected metabolites in terms of the prior knowledge contained in metabolic ...
    • Frequent patterns in ETL workflows: An empirical approach 

      Theodorou, Vasileios; Abelló Gamazo, Alberto; Thiele, Maik; Lehner, Wolfgang (Elsevier, 2017-09-05)
      Article
      Open Access
      The complexity of Business Intelligence activities has driven the proposal of several approaches for the effective modeling of Extract-Transform-Load (ETL) processes, based on the conceptual abstraction of their operations. ...
    • Graph representatives: two different approaches based on the median and the barycenter concepts 

      Bardaji Goikoetxea, Itziar (Universitat Politècnica de Catalunya, 2009-09)
      Master thesis
      Restricted access - author's decision
      The straight advantages of the use of graphs for representation purposes appear to be useless in some applications due to the lack of mathematical structure in graph domains. An illustrative example is the problem of ...
    • Lenguajes de representación del conocimiento basados en frames: estudio comparativo 

      Abad Soriano, María Teresa; Armengol Voltas, Eva; Blanco, Miguel Ángel; Castell Ariño, Núria; Delgado, Lourdes; Garijo, Francisco J.; González, Juan; Martí Antonin, Maria Antònia; Ribas Framis, Francesc; Rodríguez Hontoria, Horacio; Urretavizcaya, Maite; Verdejo Maillo, Maria Felisa; Vila Grabulosa, Lluís (1987)
      External research report
      Open Access
      Este documento es el resultado del seminario de trabajo del grupo G.U.I.A. sobre herramientas de representación del conocimiento llevado a cabo desde Octubre del 86 a Junio del 87. El objetivo principal es establecer una ...
    • Local Boolean manifolds from knowledge representation systems 

      Cattaneo, Gianpiero (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1996)
      Article
      Open Access
      We introduce a structure to represent "observations" on entities in order to obtain "knowledge" about some of their characteristic properties or attributes. This structure is based on the Pawlak's definition of "information ...
    • On (anti) conditional independence in Dempster-Shafer theory 

      Klopotek, Mieczyslaw A. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1998)
      Article
      Open Access
      This paper verifies a result of [9] concerning graphoidal structure of Shenoy's notion of independence for Dempster-Shafer theory of belief functions. Shenoy proved that his notion of independence has graphoidal ...
    • On the meanings of subsetting, specialization and redefinition in UML 

      Costal Costa, Dolors; Gómez Seoane, Cristina; Guizzardi, Giancarlo (2011-06-27)
      External research report
      Open Access
      UML 2 has improved the expressiveness of the language with respect to associations in several manners. A significant one has been the introduction of the association redefinition concept. Association subsetting and association ...
    • Overview of the MPEG-21 Media Contract Ontology 

      Rodríguez Doncel, Víctor; Delgado Mercè, Jaime; Llorente Viejo, Silvia; Rodríguez Luna, Eva; Boch, Laurent (IOS Press, 2016-01-15)
      Article
      Open Access
      The MPEG-21 Media Contract Ontology (MCO), a part of the standard ISO/IEC 21000, is an ontology to represent contracts dealing with rights on multimedia assets and intellectual property protected content in general. A core ...
    • Qualitative reasoning in Bayesian networks 

      Garbolino, Paolo (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1996)
      Article
      Open Access
      Some probabilistic inference rules which can be compared with the inference rules of preferential logic are given and it will be shown how they work in graphical models, allowing qualitative plausible reasoning in Bayesian ...
    • Reasoning about actions for the management of Urban Wastewater System: preliminary report 

      Nieves Sánchez, Juan Carlos; Aulinas, Montse; Cortés García, Claudio Ulises (IOS PRESS-ECSC, BRUXELLES, 2009-10-01)
      Conference report
      Restricted access - publisher's policy
      It is well-known that the management of Urban Wastewater Systems (UWS) is a complex and critical process. To decide which is the correct sequence of actions for managing a given circumstance it is necessary a sophisticated ...
    • Relative entailment among probabilistic implications 

      Atserias, Albert; Balcázar Navarro, José Luis; Piceno Cabrera, Marie Ely (2019-02-06)
      Article
      Open Access
      We study a natural variant of the implicational fragment of propositional logic. Its formulas are pairs of conjunctions of positive literals, related together by an implicational-like connective; the semantics of this sort ...
    • Representació del coneixement: una síntesi 

      Sànchez-Marrè, Miquel (1991-11)
      External research report
      Open Access
      En aquesta síntesi es presenta una visió global dels principals formalismes de representació del coneixement, que s'han desenvolupat al llarg de la història de la Intel·ligència Artificial. Aquesta revisió ve precedida ...
    • Skip RNN: learning to skip state updates in recurrent neural networks 

      Campos Camunez, Victor; Jou, Brendan; Giró Nieto, Xavier; Torres Viñals, Jordi; Chang, Shih-Fu (2018)
      Conference lecture
      Open Access
      Recurrent Neural Networks (RNNs) continue to show outstanding performance in sequence modeling tasks. However, training RNNs on long sequences often face challenges like slow inference, vanishing gradients and difficulty ...
    • Un entorno para la extracción de información semántica del diccionario Vox 

      Ageno Pulido, Alicia; Castellón Masalles, Irene; Rigau Claramunt, German; Rodríguez Hontoria, Horacio; Verdejo Maillo, Maria Felisa (1991-09-30)
      External research report
      Open Access
      Presentamos un entorno interactivo para la extracción de información semantica del diccionario Vox. El entorno ha sido diseñado para permitir un alto grado de automatismo en su funcionamiento, así como para proporcionar ...
    • User models and domain ontologies for generating personalized questions and answers 

      Gatius Vila, Marta (2014)
      Conference report
      Restricted access - publisher's policy
      The incorporation of user models has become more popular in recent years. This paper describes how user models, domain ontologies and natural language generation techniques can be integrated to generate personalized questions ...