Table 1 List of basis functions of the MARS and their coefficients for on-board measurements
From: Multivariate adaptive regression splines models for vehicular emission prediction
Beta | Basis | Value |
|---|---|---|
factor | function | Â |
BF0 | Â | 0.249827 |
BF1 | Max(0, SPEED-8.11) | –0.000142 |
BF2 | Max(0, SPEED-11.67) | 0.000342 |
BF3 | Max(0, SPEED-12.52) | 0.000442 |
BF4 | Max(0, SPEED-16.39) | 0.0032363 |
BF5 | Max(0, SPEED-23.89) | 0.011587 |
BF6 | Max(0, SPEED-24.17) | 0.043903 |
BF7 | Max(0.95-ACCEL, 0) | –0.001307 |
BF8 | Max(0, ACCEL-1.25) | 0.007307 |
BF9 | Max(0, ACCEL-5.85) | 0.011308 |
BF10 | Max(0, ACCEL-7.21) | 0.031102 |
BF11 | Max(0, AMBT -22.12) | 0.000231 |
BF12 | Max(0, AMBT -23.47) | 0.003130 |
BF13 | Max(0, AMBT -24.76) | 0.021131 |
BF14 | Max(0, LOAD -10.53) | 0.015618 |
BF15 | Max(0, LOAD -52.34) | 0.017966 |
BF16 | Max(0, LOAD -60.16) | 0.023225 |
BF17 | Max(0, Power -8.98) | 0.014877 |
BF18 | Max(0, Power -21.32) | 0.015679 |