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Evolving an optimal decision template for combining classifiers.

Nguyen, Tien Thanh; Luong, Anh Vu; Dang, Manh Truong; Dao, Lan Phuong; Nguyen, Thi Thu Thuy; Liew, Alan Wee-Chung; McCall, John


Anh Vu Luong

Manh Truong Dang

Lan Phuong Dao

Thi Thu Thuy Nguyen

Alan Wee-Chung Liew

John McCall


Tom Gedeon

Kok Wai Wong

Minho Lee


In this paper, we aim to develop an effective combining algorithm for ensemble learning systems. The Decision Template method, one of the most popular combining algorithms for ensemble systems, does not perform well when working on certain datasets like those having imbalanced data. Moreover, point estimation by computing the average value on the outputs of base classifiers in the Decision Template method is sometimes not a good representation, especially for skewed datasets. Here we propose to search for an optimal decision template in the combining algorithm for a heterogeneous ensemble. To do this, we first generate the base classifier by training the pre-selected learning algorithms on the given training set. The meta-data of the training set is then generated via cross validation. Using the Artificial Bee Colony algorithm, we search for the optimal template that minimizes the empirical 0–1 loss function on the training set. The class label is assigned to the unlabeled sample based on the maximum of the similarity between the optimal decision template and the sample’s meta-data. Experiments conducted on the UCI datasets demonstrated the superiority of the proposed method over several benchmark algorithms.

Start Date Dec 12, 2019
Publication Date Dec 31, 2019
Publisher Springer (part of Springer Nature)
Volume Part I
Pages 608-620
Series Title Lecture notes in computer science
Series Number 11953
Series ISSN 1611-3349
Book Title Neural information processing
ISBN 9783030367077
Institution Citation NGUYEN, T.T., LUONG, A.V., DANG, M.T., DAO, L.P., NGUYEN, T.T.T., LIEW, A.W.-C. and MCCALL, J. 2019. Evolving an optimal decision template for combining classifiers. In Gedeon, T., Wong, K.W. and Lee, M. (eds.) Neural information processing: proceedings of the 26th International conference on neural information processing (ICONIP 2019), 12-15 December 2019, Sydney, Australia. Part I. Lecture notes in computer science, 11953. Cham: Springer [online], pages 608-620. Available from:
Keywords Ensemble systems; Ensemble learning systems; Machine learning; Decision template method


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