... Backward divided difference 向后差商 Backward difference function 倒差分函数 backward difference formulas 差分法 ...
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By using backward difference of space-time intensity correlation function with respect to time delay, the two-dimensional velocity vector of a moving diffuser can be measured.
利用远场时变散斑空-时强度相关函致的有限差商可以测量散射体运动的二维速度矢量。
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