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01.09.2012 | Original Article

Active and online prediction of BOD₅ in river systems using reduced-order support vector machine

verfasst von: Roohollah Noori, Abdulreza Karbassi, Khosro Ashrafi, Mojtaba Ardestani, Naser Mehrdadi, Gholam-Reza Nabi Bidhendi

Erschienen in: Environmental Earth Sciences | Ausgabe 1/2012

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Abstract

Due to the limitations of hardware sensors for online measurement of the water quality parameters such as 5-day biochemical oxygen demand (BOD₅), the recent research efforts have focused on the software sensors for the rapid prediction of such parameters. The main objective in this research is to develop a reduced-order support vector machine (ROSVM) model based on the proper orthogonal decomposition to solve the time-consuming problem of the BOD₅ measurements. The performance of the newly developed methodology is tested on the Sefidrood River Basin, Iran. Subsequently, the predicted values of BOD₅, resulted from the selected developed ROSVM model, are compared with the results of support vector machine (SVM) model. According to the obtained results, selected ROSVM model seems to be more accurate, showing Person correlation coefficient (R) and root mean square error (RMSE) equal to 0.97 and 6.94, respectively. Further, the investigations based on developed discrepancy ratio (DDR) statistic for selection of the optimum model between the best accurate ROSVM and SVM models are carried out. Results of DDR statistic indicated superior performance of the selected ROSVM model comparing to the SVM technique for online prediction of BOD₅ in the Sefidrood River.

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Titel: Active and online prediction of BOD5 in river systems using reduced-order support vector machine
verfasst von: Roohollah Noori
Abdulreza Karbassi
Khosro Ashrafi
Mojtaba Ardestani
Naser Mehrdadi
Gholam-Reza Nabi Bidhendi
Publikationsdatum: 01.09.2012
Verlag: Springer-Verlag
Erschienen in: Environmental Earth Sciences / Ausgabe 1/2012
Print ISSN: 1866-6280
Elektronische ISSN: 1866-6299
DOI: https://doi.org/10.1007/s12665-011-1487-9

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