The algorithm first makes a top-down coarse location using the projection analysis of the edge density graph and then makes a bottom-up precise location based on the vertical edge linkage intensity.

该算法首先通过对边缘密度图进行投影分析进行自顶向下的粗定位，然后在此基础上利用垂直边缘的连接强度进行自底向上的精确定位。

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Because of the differences of the roughness, the interflow, the soil moisture and the rainfall intensity, the pipe flow process shows different hydraulic graph.

由于土管内部粗糙程度和分枝合流情况不同，土壤前期降雨量、本次降雨强度影响也造成管流的水文过程产生差别。

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