Digitale Bibliotheek
Sluiten Bladeren door artikelen uit een tijdschrift
 
<< vorige    volgende >>
     Tijdschrift beschrijving
       Alle jaargangen van het bijbehorende tijdschrift
         Alle afleveringen van het bijbehorende jaargang
           Alle artikelen van de bijbehorende aflevering
                                       Details van artikel 3 van 11 gevonden artikelen
 
 
  Density estimation of high dimensional data using ICA and Bayesian networks
 
 
Titel: Density estimation of high dimensional data using ICA and Bayesian networks
Auteur: Rouigueb, Abdenebi
Chitroub, Salim
Bouridane, Ahmed
Verschenen in: Intelligent data analysis
Paginering: Jaargang 18 (2014) nr. 2 pagina's 157-179
Jaar: 2014-03-04
Inhoud: This paper proposes a semi-non parametric density estimation framework for high-dimensional data. Dimensionality reduction is achieved by reorganizing the domain variables set into a junction tree of cliques each containing a small number of variables where factorization of the joint density into a tree is carried out by learning the Bayesian Network (BN) structure graph and by searching the maximum spanning tree over the moralized-triangulated graph of the obtained BN. To estimate the density of the junction tree elements, we propose a novel technique using local Independent Component Analysis (ICA) method based on fuzzy clustering. The main contribution relates to the development of a generic framework through a combination of three complimentary modules: (1) BN structure learning, (2) fuzzy clustering, and (3) linear ICA method. This allows us to exploit the separation power of recently developed ICA tools. Hence, depending on the data characteristics, the user can choose among a wide range of ICA and BN tools the most suitable one. We experimentally evaluated our approach in a supervised classification problem and the obtained results indicate an improvement in accuracy.
Uitgever: IOS Press
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

                             Details van artikel 3 van 11 gevonden artikelen
 
<< vorige    volgende >>
 
 Koninklijke Bibliotheek - Nationale Bibliotheek van Nederland