V0和B拟合是地球物理勘探速度计算的经验公式，由时间深度或时间均方根速度拟合V0及B值，有了这两个值以后可以计算任意时间点的深度及速度关系-V0 and B is a geophysical exploration speed fitting the experimental formula, from time to time, depth or speed fit RMS value of V0 and B, with these two values can be calculated a