Study of Comparative Performances of Different Models for the Variation of Dielectric Parameters of Shelled Yellow�dent Field Corn with Moisture Content at 2.45 GHz.

In the present work two models namely, quadratic and cubic, for the variation of relative permittivity and dielectric loss factor of shelled yellow-dent field corn, Zea mays L. with decimal moisture content at a microwave frequency of 2.45 GHz have been proposed by the authors. The data of results for relative permittivity and loss factor have been derived from the works of S.O. Nelson and the models chosen for comparison with the present models are also due to S.O. 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 (≈ 0.99), except for cubic model for loss factor (r2 ≈ 0.89), and lower average percentage errors, excepting the cubic model for loss factor having average errors ≈ 19.49 %, both the present models and both dielectric parameters compare the present models favorably with the established models.