Figure 9
From: Unveiling the mystery of scale dependence of surface roughness of natural rock joints
Double-logarithmic relationship between standard deviations of heights of two-order roughness (\(S_w(\omega )\) and \(S_u(\omega )\), respectively) and window length (\(\omega\)) of the sample size of \(900 \mathrm \, mm \times 900 \mathrm \, mm\) of joint sample S1. \(D_w\) and \(D_u\) denote the fractal dimensions of waviness and unevenness, respectively. \(R^2_w\) and \(R^2_u\) are the coefficients of determination in estimating the fractal dimensions of waviness and unevenness, respectively.
