讨论了总体地形非均匀、局部均匀地形和孤立目标杂波之间的关系。
The relations among the clutter of heterogeneous terrain, local homogeneous terrain, and isolated objects were discussed.
原有地面形态被平盘与边坡相间的梯状地形所代替，5～10年间非均匀沉降剧烈，边坡不稳；
The original topographic appearance was substituted by terraced slopes, resulting in severe uneven subsidence during 5~10 years and instability of steep slopes.
提出一种新的三维空间不规则网格有限差分方法，模拟具有地形构造的非均匀各向异性介质中弹性波传播过程。
This paper presents a new 3d finite-difference (FD) method using spatially irregular grids to simulate elastic wave propagation in heterogeneous anisotropic media with topographic structures.
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