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Table 9

Values of DR for existing equations, and ANN and ANFIS models

InvestigatorDR values
MeanMinimumMaximum
Present study (ANN model) 0.98 0.85 1.16 
Present study (ANFIS model) 1.00 0.86 1.22 
Dey & Sarkar (2006)  1.02 0.75 1.42 
Sarkar & Dey (2005)  1.01 0.73 1.34 
Lim & Yu (2002)  1.47 0.66 4.27 
Aderibigbe & Rajaratnam (1998)  4.37 0.87 6.73 
Chatterjee et al. (1994)  0.68 0.48 1.26 
Altinbilek & Basmaci (1973)  35.50 5.25 151.04 
Valentin (1967)  1.67 0.86 2.36 
InvestigatorDR values
MeanMinimumMaximum
Present study (ANN model) 0.98 0.85 1.16 
Present study (ANFIS model) 1.00 0.86 1.22 
Dey & Sarkar (2006)  1.02 0.75 1.42 
Sarkar & Dey (2005)  1.01 0.73 1.34 
Lim & Yu (2002)  1.47 0.66 4.27 
Aderibigbe & Rajaratnam (1998)  4.37 0.87 6.73 
Chatterjee et al. (1994)  0.68 0.48 1.26 
Altinbilek & Basmaci (1973)  35.50 5.25 151.04 
Valentin (1967)  1.67 0.86 2.36 
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