Please use this identifier to cite or link to this item:
DC FieldValueLanguage
dc.contributor.authorSamadianfard, Sen_US
dc.contributor.authorMajnooni-Heris, Aen_US
dc.contributor.authorQasem, SNen_US
dc.contributor.authorKisi, Oen_US
dc.contributor.authorShamshirband, Sen_US
dc.contributor.authorChau, KWen_US
dc.identifier.citationEngineering applications of computational fluid mechanics, 1 Jan. 2019, v. 13, no. 1, p. 142-157en_US
dc.description.abstractSolar radiation, moisture and temperature are the most vital meteorological variables which affect plant growth. Due to the fact that the global solar radiation (GSR) is scarcely gauged at meteorological stations in developing countries, it is commonly estimated by data-driven techniques or by empirical equations. In this study, support vector regression (SVR), model trees (MT), gene expression programming (GEP) and adaptive neuro-fuzzy inference system (ANFIS) and several empirical equations were applied to assess the relations between GSR and several meteorological variables including minimum temperature (T-min), maximum temperature (T-max), relative humidity (RH), sunshine hours (n), maximum sunshine hours (N), corrected clear-sky solar irradiation (ICSKY), day of year (DOY) and extra-terrestrial radiation (R-a). For this purpose, the daily GSR measured from the beginning of 2011 to the end of 2013 at Tabriz synoptic station, which is located in semi-arid regions of Iran, were used. A direct strong relationship was observed to exist between the GSR and n. For evaluating the performances of studied techniques, three different statistical indicators were used namely root mean square error (RMSE), mean absolute error (MAE), and correlation coefficient (CC). Additionally, a Taylor diagram was utilized to test the similarity between the observed and predicted GSR values. Results indicated that the SVR-6 with input parameters of R-a, RH, T-min, T-max, n/N had better accuracy in predicting GSR with RMSE of 1.656, MAE of 0.990, CC of 0.980 and WI of 0.990 than the other models. Moreover, MT-6 ranked as the second best model in the prediction of GSR values. As an interesting point, studied empirical equations had lower accuracies comparing with the SVR, GEP, MT and ANFIS methods. For instance, GSR values were computed by Angstrom and Prescott equation, as the best empirical equation, with RMSE of 1.786, MAE of 1.156, CC of 0.977 and WI of 0.988. Conclusively, results from the current study proved that the SVR provided reasonable trends for GSR modeling at Tabriz synoptic station. Furthermore, MT models with linear equations can be implemented with a high degree of simplicity and acceptable precision in GSR estimation.en_US
dc.description.sponsorshipDepartment of Civil and Environmental Engineeringen_US
dc.publisherHong Kong Polytechnic University, Department of Civil and Structural Engineeringen_US
dc.relation.ispartofEngineering applications of computational fluid mechanicsen_US
dc.rights© 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use,distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.rightsThe following publication Samadianfard, S., Majnooni-Heris, A., Qasem, S. N., Kisi, O., Shamshirband, S., & Chau, K. W. (2019). Daily global solar radiation modeling using data-driven techniques and empirical equations in a semi-arid climate. Engineering Applications of Computational Fluid Mechanics, 13(1), 142-157 is available at
dc.subjectData-driven technicsen_US
dc.subjectEmpirical equationsen_US
dc.subjectMeteorological parametersen_US
dc.subjectGlobal solar radiationen_US
dc.titleDaily global solar radiation modeling using data-driven techniques and empirical equations in a semi-arid climateen_US
dc.typeJournal/Magazine Articleen_US
dc.description.validate201903 bcrc-
Appears in Collections:Journal/Magazine Article
Files in This Item:
File Description SizeFormat 
Samadianfard_Daily_Solar_Data-driven.pdf4.73 MBAdobe PDFView/Open
View full-text via PolyU eLinks SFX Query
Show simple item record
PIRA download icon_1.1View/Download Contents


Citations as of Feb 14, 2020


Citations as of Feb 20, 2020

Page view(s)

Citations as of Feb 19, 2020


Citations as of Feb 19, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.