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Multi-objective model type selection
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DOI：10.1016/j.neucom.2014.05.077.png)
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摘要
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Classification is a mainstream within the machine learning community. As a result, a large number of learning algorithms have been proposed. The performance of many of these could highly depend on the chosen values of their hyper-parameters. This paper introduces a novel method for addressing the model selection problem for a given classification task. In our model selection formulation, both the learning algorithm and its hyper-parameters are considered. In our proposed approach, model selection is tackled as a multi-objective optimization problem. The empirical error, or training error, and the model complexity are defined as the objectives. We adopt a multi-objective evolutionary algorithm as the search engine, due to its high performance and its advantages for solving multi-objective problems. The model complexity is estimated experimentally, in a general fashion, for any learning algorithm, through the VC dimension. Strategies for choosing a single model or for constructing an ensemble of models from the resulting non-dominated set are also proposed. Experimental results on benchmark data sets indicate the effectiveness of the proposed approach. Furthermore, a comparative study shows that the obtained models are highly competitive, in terms of generalization performance, with other methods in the state of the art that focus on a single-learning algorithm, or a single-objective approach. (C) 2014 Elsevier B.V. All rights reserved.
Keyword:
Model type selection
VC dimension
Multi-objective optimization
Ensemble methods
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期刊
IF:
6.5
论文数:
2.5W
被引数:
6.5W
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