20.500.12556/DKUM-65391 Characterization of Slovenian coal and estimation of coal heating value based on proximate analysis using regression and artificial neural networks Chemical composition of Slovenian coal has been characterised in terms of proximate and ultimate analyses and the relations among the chemical descriptors and the higher heating value (HHV) examined using correlation analysis and multivariate data analysis methods. The proximate analysis descriptors were used to predict HHV using multiple linear regression (MLR) and artificial neural network (ANN) methods. An attempt has been made to select the model with the optimal number of predictor variables. According to the adjusted multiple coefficient of determination in the MLR model, and alternatively, according to sensitivity analysis in ANN developing, two descriptors were evaluated by both methods as optimal predictors: fixed carbonand volatile matter. The performances of MLR and ANN when modelling HHV were comparable; the mean relative difference between the actual and calculated HHV values in the training data was 1.11% for MLR and 0.91% for ANN. The predictive ability of the models was evaluated by an external validation data set; the mean relative difference between the actual and predicted HHV values was 1.39% in MLR and 1.47% in ANN. Thus, the developed models could be appropriately used to calculate HHV. Slovenian coal higher heating value HHV regression artificial neural network slovenski premog bruto kalorična vrednost BKV regresija umetne nevronske mreže true false true Angleški jezik Slovenski jezik Znanstveno delo 2017-04-03 13:45:31 2017-04-03 13:46:47 2022-07-08 03:07:57 2019-07-11 15:16:47 2013 0 0 str. 1481-1491 št. 9 Letn. 11 2013 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1895-1066 66:004.5 11055638 17017878 10.2478/s11532-013-0280-x 1895-1066 URN:SI:UM:DK:BOTBT0OQ Open_Chemistry_2013_Kavsek_et_al._Characterization_of_Slovenian_coal_and_estimation_of_coal_heating_value_based_on_proximate_analysis_us.pdf Open_Chemistry_2013_Kavsek_et_al._Characterization_of_Slovenian_coal_and_estimation_of_coal_heating_value_based_on_proximate_analysis_us.pdf 1 CED22FDA5AB9046E84918F6390EE5B7A 1192bafa854895bc9a33ed6c98b9da7808ee89a512e5043169a1913a885071f2 0e4b9952-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=110522 http://www.degruyter.com/view/j/chem.2013.11.issue-9/s11532-013-0280-x/s11532-013-0280-x.xml 1 https://dk.um.si/Dokument.php?lang=slv&id=110521 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0