The fast computation of terrain correction in a large area is significant for modern geodetic practice, especially in rough mountain areas.
大面积地形改正的快速计算，对现代大地测量实践具有重大意义，尤其是在那些地形复杂地区。
In the rough set theory and rough-fuzzy set theory, computation of approximations and edge and attributes reduction of decision table is import part of them.
在粗糙集理论及粗糙模糊集理论中，上下近似及边界的求解与决策表属性约简是它们的核心内容。
In the rough set theory and rough-fuzzy set theory, computation of approximations and edge and attributes reduction of decision table is import part of them.
在粗糙集理论及粗糙模糊集理论中，上下近似及边界的求解与决策表属性约简是它们的核心内容。
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