D

a

b

0.01 ≤ D < 0.031

−26.6588

3.2739

0.031 ≤ D < 0.076

−7.6631

2.6975

0.076 ≤ D < 0.165

−3.2197

2.3675

0.165 ≤ D < 0.368

−1.0449

2.0252

0.368 ≤ D < 0.687

−0.3097

1.7553

0.687 ≤ D < 1.306

−0.0068

1.5474

1.306 ≤ D < 4.18

0.1148

1.3777

4.18 ≤ D < 21.5

0.1615

1.1599

21.5 ≤ D ≤ 100

0.1663

1.0578