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Lookup NU author(s): Dr Jie ZhangORCiD, Zainal Ahmad
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Taylor & Francis, 2019.
For re-use rights please refer to the publisher's terms and conditions.
The current calculations of water quality index (WQI) were sometimes can be very complex and time-consuming which involves sub-index calculation like BOD and COD, however with the support vector machine (SVM) and least squares support vector machine (LS-SVM) models, the WQI can be predicted immediately using directly measured physical data by using the same predictors used in the numerical approach without any sub-index calculation. There were three main parameters that control the performance of the SVM model however only the type of kernel function was investigated, they were linear, radial basis function (RBF) and polynomial kernel functions. The results of the model were then analysed by using sum squares error (SSE), mean of sum squares error (MSSE) and coefficient of determination (R2). It was found that the best kernel function for the SVM model was polynomial kernel function with R2 of 0.8796. Furthermore, LS-SVM model that trained with correct predictors had higher accuracy with R2 of 0.9227 as compared with SVM model that trained with all the predictors with R2 of 0.9184. The SSE and MSSE are 74.78 and 1.5594, 1.6454 for LS-SVM and SVM respectively.
Author(s): Cong LW, Bahadori A, Zhang J, Ahmad Z
Publication type: Article
Publication status: Published
Journal: International Journal of River Basin Management
Year: 2019
Volume: 13
Issue: 6
Pages: 1310-1318
Print publication date: 01/12/2019
Online publication date: 06/06/2019
Acceptance date: 04/06/2019
Date deposited: 10/06/2019
ISSN (print): 1571-5124
ISSN (electronic): 1814-2060
Publisher: Taylor & Francis
URL: https://doi.org/10.1080/15715124.2019.1628030
DOI: 10.1080/15715124.2019.1628030
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