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. 2020 Feb 28;13(5):1072. doi: 10.3390/ma13051072

Table 4.

Analysis and interpretation of PDP curves.

Input Fit Equation Form Effect Nature of Correlation Effect Rank
Density Exponential CS = 0.044* exp(2.967 D) Positive Nonlinear 1
W/C Quadratic CS = 0.31 W/C 2 - 0.64 W/C + 0.60 Negative Nonlinear 3
S/C Linear CS = -0.3 S/C + 0.55 Negative Linear 2