Table 2 List of basis functions of the B-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 | 0.218753 |
BF1 | Max(0, SPEED-9.22) | –0.000112 |
BF2 | Max(0, SPEED-12.54) | –0.000212 |
BF3 | Max(0, SPEED-14.23) | 0.000211 |
BF4 | Max(0, SPEED-17.16) | 0.002417 |
BF5 | Max(0, SPEED-24.32) | 0.011213 |
BF6 | Max(0.98-ACCEL, 1.12) | –0.001126 |
BF7 | Max(0, ACCEL-2.61) | –0.004267 |
BF8 | Max(0, ACCEL-6.92) | 0.011211 |
BF9 | Max(0, ACCEL-7.56) | 0.024123 |
BF10 | Max(0, AMBT -22.51) | 0.000212 |
BF11 | Max(0, AMBT -23.78) | 0.003451 |
BF12 | Max(0, LOAD -13.15) | 0.013617 |
BF13 | Max(0, LOAD -54.56) | 0.016541 |
BF14 | Max(0, POWER -7.34) | 0.012346 |
BF15 | Max(0, POWER -9.76) | 0.013145 |
BF16 | Max(0, POWER -22.17) | 0.012678 |