The ensemble approach in comparison with the diverse feature selection techniques for estimating NPPs parameters using the different learning algorithms of the feed-forward neural network

Several reasons such as no free lunch theorem indicate that there is not a universal Feature selection (FS) technique that outperforms other ones. Moreover, some approaches such as using synthetic dataset, in presence of large number of FS techniques, are very tedious and time consuming task. In thi...

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Bibliographic Details
Published in:Nuclear engineering and technology Vol. 53; no. 12; pp. 3944 - 3951
Main Author: Moshkbar-Bakhshayesh, Khalil
Format: Journal Article
Language:English
Published: Elsevier B.V 01.12.2021
Elsevier
한국원자력학회
Subjects:
Combination technique
Features selection technique
Heterogeneous ensemble
Parameter estimation
Supervised learning algorithm
원자력공학
Heterogeneous ensemble
Parameter estimation
Combination technique
Supervised learning algorithm
Features selection technique
ISSN:1738-5733, 2234-358X
Online Access:Get full text
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Summary:Several reasons such as no free lunch theorem indicate that there is not a universal Feature selection (FS) technique that outperforms other ones. Moreover, some approaches such as using synthetic dataset, in presence of large number of FS techniques, are very tedious and time consuming task. In this study to tackle the issue of dependency of estimation accuracy on the selected FS technique, a methodology based on the heterogeneous ensemble is proposed. The performance of the major learning algorithms of neural network (i.e. the FFNN-BR, the FFNN-LM) in combination with the diverse FS techniques (i.e. the NCA, the F-test, the Kendall's tau, the Pearson, the Spearman, and the Relief) and different combination techniques of the heterogeneous ensemble (i.e. the Min, the Median, the Arithmetic mean, and the Geometric mean) are considered. The target parameters/transients of Bushehr nuclear power plant (BNPP) are examined as the case study. The results show that the Min combination technique gives the more accurate estimation. Therefore, if the number of FS techniques is m and the number of learning algorithms is n, by the heterogeneous ensemble, the search space for acceptable estimation of the target parameters may be reduced from n × m to n × 1. The proposed methodology gives a simple and practical approach for more reliable and more accurate estimation of the target parameters compared to the methods such as the use of synthetic dataset or trial and error methods.
ISSN:1738-5733
2234-358X
DOI:10.1016/j.net.2021.06.030