在这幅图像中黑色玄武岩沙带被从冰层下面显露出来，在季节性冰盖的顶部形成扇形堆积。
In this image streaks of dark basaltic sand have been carried frombelow the ice layer to form fan-shaped deposits on top of the seasonalice.
深部—浅部系列冲断构造块体和不对称扇形构造形变体是组成区内“华南造山带”中一个重要的构造单元。
A group of deep-shallow thrusting sheets and asymmetric deformationfan-tectosomes is a key tectonic(division)domain in S. China orogenic zone.
因此，作者将二维扇形滤波方法做了近一步的改善，引入了频率—波数域内带通切饼式滤波方法。
So the author improves the 2-d sector filtering method, introduces the bang-transit and cake-cut filtering method in frequency - wave count area.
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