Construction of approximation polynomials and dispersion isolines of forecasted values using computer mathematics systems
Abstract
The matrix of planning experiments based on three-component compounds is considered. The method for the construction of the approximation polynomials and dispersion isolines of the forecasted values for experimental planning matrices is described for two different cases: when the experimental points are located at the simplex vertices simplex edges or when they are located inside the investigated region. The construction scheme for dispersion isolines of forecasted values in the case of regression polynomials of the second, the third and the fourth orders in the Cartesian coordinates is proposed. For the construction of ternary plots using Cartesian coordinates, the Draper-Lawrence transition formula was exploited. Proposed scheme is approved using experimental matrices of D-optimal and simplex-grate plans of the second, third and fourth order. Several optimal matrices for experimental plans of the second order were obtained using the computer mathematics system. Dispersion isolines of the forecasted values for these plans were constructed.References
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