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The impact of diversity on the accuracy of evidential classifier ensembles

Bi, Yaxin (2012) The impact of diversity on the accuracy of evidential classifier ensembles. International Journal of Approximate Reasoning, 53 (4). pp. 584-607. [Journal article]

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DOI: 10.1016/j.ijar.2011.12.011


Diversity being inherent in classifiers is widely acknowledged as an important issue in constructingsuccessful classifier ensembles. Although many statistics have been employed inmeasuring diversity among classifiers to ascertainwhether it correlates with ensemble performancein the literature, most of these measures are incorporated and explained in anon-evidential context. In this paper, we provide a modeling for formulating classifier outputsas triplet mass functions and a uniform notation for defining diversity measures. Wethen assess the relationship between diversity obtained by four pairwise and non-pairwisediversitymeasures and the improvement in accuracy of classifiers combined in different ordersby Demspter’s rule of combination, Smets’ conjunctive rule, the Proportion and Yager’srules in the framework of belief functions. Our experimental results demonstrate that theaccuracy of classifiers combined by Dempster’s rule is not strongly correlated with thediversity obtained by the four measures, and the correlation between the diversity andthe ensemble accuracy made by Proportion and Yager’s rules is negative, which is not infavor of the claim that increasing diversity could lead to reduction of generalization error ofclassifier ensembles.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Computing and Mathematics
Research Institutes and Groups:Computer Science Research Institute
Computer Science Research Institute > Artificial Intelligence and Applications
ID Code:22946
Deposited By: Dr Yaxin Bi
Deposited On:10 Aug 2012 10:27
Last Modified:10 Aug 2012 10:27

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