Application of Gene Expression Programming to Evaluate Strength Characteristics of Hydrated-Lime-Activated Rice Husk Ash-Treated Expansive Soil

Figure 3

Frequency histograms of the input and output variables: (a) HARHA; (b); (c); (d); (e); (f) A_C; (g) δ_max; (h) CBR; (i) UCS₂₈; (j) R_Value. Note: the input parameters are illustrated in blue while the output variables are expressed as green histograms.

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