Image denoising with second order non-linear diffusion PDEs often leads to an undesirable staircase effect, namely, the transformation of smooth regions into piecewise constant ones.
利用二阶的非线性扩散方程进行图像去噪易产生具有“阶越效应”的去噪结果，也即使分段光滑的图像变为分段常量的。
This produced upon him the effect of the first step in a staircase leading back to life.
他觉得自己好象踏上了生命阶梯上的第一级。
The terracing effect was echoed even more dramatically in the design of the grand staircase that connects the ground floor reception area to the courtyard.
梯田的效果在连接底层接待区与庭院的大型阶梯的设计映衬下显得更加具有冲击力。
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