它对一定时间间隔内两次采样得到的图象进行运算，用最陡梯度下降法直接迭代出图象位移的估计值。
The algorithm which utilizes the Steepest Descent Method can give the estimation of displacement between two frames of image directly.
由于乙烯爆炸性分解，在反应管壁厚上形成极陡的温度梯度和幅度很大的热应力。
The explosive decomposability of ethylene will lead to much large temperature gradient and great range thermal stresses response on thick wall of reactor.
塌陷的扩大造成暗河通道的阻塞和改道，使得水力梯度变陡，溶蚀和侵蚀增强。
The collapse propagates itself by blocking and diverting the underground streams, so that hydraulic gradients become steeper and the solutional and erosional capacities are enhanced.
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