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The forward-backward difference can not only detect the static and motion regions but also detect the 3-2 Pull-Downed movie sequences.
对于检测到的电影序列，则进行3 2下拉恢复处理，输出电影模式的逐行扫描帧；
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。
Given the stability, error estimate and numerical experiments for the nonlinear equation of second order backward difference(4)Given the weighted of second order convolution quadrature.
给出非线性方程的二阶向后差分格式稳定性、误差估计。 （4）给出二阶卷积积分的权重。
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