通过虚拟矢量空间尺度的放大，进一步减少小扇区的划分，简化计算。
It enlarges the space scale of virtual vector to decrease the division of small sectors, thus simplifying the calculation.
湍流模型采用简化的亚网格尺度湍流粘性公式。
The effects of turbulence are modeled with a simplified subgrid-scale eddy viscosity.
针对复杂建筑物的点云数据量庞大，通过不同精度的实验确定了模型简化的适宜尺度。
Because the number of complex buildings 'point cloud data is very huge, this paper has determined the suitable criterion of model simplifying through experiments using different accuracy.
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