Exploració per tema "Missing values"

Ara es mostren els items 1-7 de 7

    • A kernel extension to handle missing data 

      Nebot Troyano, Guillermo; Belanche Muñoz, Luis Antonio (Springer-Verlag, 2009)
      Text en actes de congrés
      Accés obert
      An extension for univariate kernels that deals with missing values is proposed. These extended kernels are shown to be valid Mercer kernels and can adapt to many types of variables, such as categorical or continuous. The ...

    • Consequences of using estimated response values from negligible interactions in factorial designs 

      Xampeny Solaní, Rafael; Grima Cintas, Pedro; Tort-Martorell Llabrés, Xavier (2018-12-21)
      Article
      Accés obert
      This article analyzes the increase in the probability of committing type I and type II errors in assessing the significance of the effects when some properly selected runs have not been carried out and their responses have ...

    • Estimating missing values from negligible interactions in factorial designs 

      Xampeny Solaní, Rafael; Grima Cintas, Pedro; Tort-Martorell Llabrés, Xavier (2017-01-01)
      Article
      Accés obert
      When a factorial design has some missing value but there are contrasts (at least as many as there are missing values) corresponding to interactions that can be considered negligible, equating the expressions of those ...

    • Fuzzy sequential pattern mining in incomplete databases 

      Fiot, Céline; Laurent, Anne; Teisseire, Maguelonne (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2008)
      Article
      Accés obert
      Recent widening of data mining application areas have lead to new issues. For instance, frequent sequence discovery techniques that were developed for customer behaviour analysis are now applied to analyse industrial or ...

    • Learning with heterogeneous neural networks 

      Belanche Muñoz, Luis Antonio (Nova Science Publishers, Inc. New York, 2011)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This chapter studies a class of neuron models that computes a user-defined similarity function between inputs and weights. The neuron transfer function is formed by composition of an adapted logistic function with the ...

    • Saving runs in fractional factorial designs 

      Grima Cintas, Pedro; Rodero de Lamo, Lourdes; Tort-Martorell Llabrés, Xavier (2018-12-27)
      Article
      Accés obert
      When it is known a priori that some contrasts are negligible in a factorial design, their expressions can be used to deduce the missing results. In this article we propose a method for using this procedure when, as in the ...

    • The usefulness of discrimination based on distances on human evolution 

      Arenas Solá, Concepción; Turbón Borrega, Daniel (Institut d'estadística de Catalunya, 1998)
      Article
      Accés obert
      The reconstruction of human history from the fossil record often runs up against incomplete or differential preservation of specimens. In anthropological studies a large number of variables are usually taken and missing ...