The coastal boundary condition is commonly set to be the mean sea level in existing models of regional coastal groundwater flow, neglecting the influence of tides.
在现有的沿海区域地下水模拟中往往将海岸边界条件定为平均海平面高度，忽略潮汐的影响。
2
The conducting mode of the proposed DCDC converter is different from any existing DCDC converters, so the boundary conditions of the proposed converter are analyzed in detail.
由于它的导电模式不同于任何现有的变换器，因此本文对这种变换器的临界条件进行了详细分析。
3
They can be used to replace existing open bearings since they have the same boundary dimensions.