Table 6. The Coefficient of Determination (R
2
) between Wear Rate (
R
h
,
R
w
) and Ψ
c
Based on the Value of A and B
N
2
:DBP
1 : 9
2 : 8
3 : 7
4 : 6
5 : 5
6 : 4
7 : 3
8 : 2
9 : 1
A
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
B
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
R
2
R
h
0.910
0.913
0.908
0.892
0.863
0.820
0.763
0.693
0.613
R
w
0.907
0.910
0.905
0.889
0.861
0.819
0.763
0.694
0.616