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Table 1 Comparison of [ξ] for σ=1, ϑ = − 2.3

From: A Comparative Study on Asperity Peak Modeling Methods

Correlation length Method ξavg Percent variation σξ Percent variation
0 Three-point definition 0.8445 0 1.0005 0
Spectral moment approach 1.8411 118.01%↑ 0.6352 − 36.51%↓
50 Three-point definition 0.2366 0 0.9980 0
Spectral moment approach 0.4619 95.22%↑ 0.9833 − 1.47%↓
100 Three-point definition 0.1890 0 1.0035 0
Spectral moment approach 0.2274 20.32%↑ 0.9909 − 1.26%↓