通过此算法，能计算出抽油杆柱在任意时刻，任意截面的位移和载荷，而且该方法在计算时无条件稳定，特别适用于对斜井的预测。
By using this method, it can evaluate the displacement and the load of any section at any time, and the method is stable, and it is especial adapt to the inclined well.
该法能在一张散斑图上记录下物体动态变形的全过程，在全场滤波时可得到任意时刻的瞬态位移偏导数场。
The whole dynamic process can be recorded on a single specklegram, and the derivatives of displacements of every moment can be obtained by whole-field filtering.
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