Table 2. Parameters, coefficients of determination (R²), relative mean error (E), sum of squared error (SSE) and root mean square error (RMSE) of the mathematical models fitted to the moisture ratio data at different pretreatments.

Model	Parameter	R2	E/%	SSE	RMSE
Control
Page	k=0.008; n=0.868	0.994	0.618	6·10-4	0.025
Wang and Singh	a=−0.004; b=7·10-6	0.999	0.043	1.6·10-4	0.011
Logarithmic	a=0.788; b=0.007; k=0.234	0.998	0.092	1.8·10-4	0.013
UA 20
Page	k=0.005; n=0.972	0.996	0.920	6·10-4	0.024
Wang and Singh	a=−0.005; b=7·10-6	0.998	6.475	0.002	0.051
Logarithmic	a=0.893; b=0.007; k=0.144	0.998	0.102	2.2·10-4	0.015
UA 30
Page	k=0.007; n=0.945	0.995	1.114	7·10-4	0.027
Wang and Singh	a=−0.005; b=8·10-6	0.998	0.153	2.1·10-4	0.014
Logarithmic	a=0.881; b=0.007; k=0.157	0.998	0.126	2.4·10-4	0.015
OD 60
Page	k=0.008; n=0.865	0.994	0.621	6·10-4	0.025
Wang and Singh	a=−0.004; b=7·10-6	0.999	0.030	1.5·10-4	0.012
Logarithmic	a=0.779; b=0.007; k=0.244	0.998	0.078	1.7·10-4	0.013
UAOD 20
Page	k=0.008; n=0.892	0.994	0.670	7·10-4	0.026
Wang and Singh	a=−0.004; b=7·10-6	0.998	0.003	2.1·10-4	0.014
Logarithmic	a=0.813; b=0.007; k=0.215	0.998	0.130	2.5·10-4	0.016
UAOD 30
Page	k=0.009; n=0.849	0.994	0.522	6·10-4	0.024
Wang and Singh	a=−0.004; b=7·10-6	0.998	0.117	2.3·10-4	0.015
Logarithmic	a=0.760; b=0.007; k=0.259	0.998	0.086	2·10-4	0.014
UAOD 40
Page	k=0.009; n=0.849	0.993	0.595	7·10-4	0.026
Wang and Singh	a=−0.004; b=7·10-6	0.998	0.060	2.1·10-4	0.014
Logarithmic	a=0.762; b=0.007; k=0.262	0.998	0.091	2·10-4	0.013

a, b and n are the parameters and k is the constant of the mathematical models. UA 20 and 30=treatment with ultrasound for 20 and 30 min, respectively, OD 60=osmotic dehydration for 60 min, UAOD 20, 30 and 40=ultrasound-assisted osmotic de hydration for 20, 30 and 40 min