Erosion, dilation, opening operation and closing operation are the basis of mathematical morphology.
膨胀、腐蚀、开运算、闭运算是数学形态学的基础。
2
The compilation of this map provided scientific basis for controlling soil erosion of sloping cultivated land and its rational utilization in the region.
该图的编制为治理本区坡耕地水土流失、合理利用坡耕地资源提供了科学依据。
3
To establish a predicting model of slope erosion modulus and gully erosion modulus on the basis of special definition for the meanings of slope erosion, gully erosion and gully gravity erosion.