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Astudy of comparative quantitative performances of moisture-dependent models formicrowave complex permittivity of soft redwinterwheat

Z.Ahmad, A.Prasad, U.K.Prasad, Kamlesh Prasad

In the present work, two models namely, quadratic and cubic, for the variation of relative permittivity and dielectric loss factor of soft red winter wheat (Triticum aestivum L.), with decimal moisture content at 2.45 GHz have been proposed by the authors. The resulting data for relative permittivity and loss factor have been derived from the works of Nelson. The models chosen for comparison with the present models are also due to Nelson. The evaluation of constants for the models has been done using the method of Least-Squares-Fit for nonlinear regression analysis. With the values of coefficients of determination (r2) too close to unity (ï‚» 0.99), and lower average percentage errors ï‚»1 and 0.3 for relative permittivity and ï‚»8.7 and 4.1, respectively for both the present models compare them favorablywith the establishedmodels.