等级

描述

数目

R0

(μA = 0) AND (H = 0)

546

R1

(0 < μA ≤ 5) AND (H = 0)

153

R2

((5 < μA < 15) OR (0 < H < 5)) AND (NV = 0)

247

R3

(μA ≥ 15) OR (H ≥ 5) OR (NV = 1)

254