That vector is called a "null vector".
那种矢量就叫做”零矢量“。
In this paper the focal mechanism of the major shock and several aftershocks has been studied and the strike of seismic fracture has been also determined by means of null vector data.
本文研究了主震与若干余震的震源机制解，并应用零矢量方法确定了地震破裂面的走向。
In this paper the focal mechanism of the major shock and several aftershocks has been studied and the strike of seismic fracture has been also determined by means of null vector data.
本文研究了主震与若干余震的震源机制解，并应用零矢量方法确定了地震破裂面的走向。
应用推荐