As raster grid networks of digital elevation model in GIS can be used as the finite difference mesh, the continuity and momentum equations are solved numerically using the finite difference method.
由于GIS中的栅格网络数据可以直接作为有限差分的网格，二维数值模型可用有限差分来求解。
In the model, approximate quality difference of two evaluations in the same level is computed by rough sets, and the importance degree is determined by difference. The model is validated by instance.
应用粗糙集理论计算相同层次两两评价指标的近似质量差，根据差的大小确定指标重要性，并通过实例证明了该模型的合理性和正确性。
It has been focused in compute vision research fields. A improved HSI image difference model based on sequences image difference and second image difference is presented.
给出连续图像帧差分和二次帧差分改进的图像HSI差分模型，采用自适应分割算法能在任意条件下自动提取运动目标区域。
It has been focused in compute vision research fields. A improved HSI image difference model based on sequences image difference and second image difference is presented.
给出连续图像帧差分和二次帧差分改进的图像HSI差分模型，采用自适应分割算法能在任意条件下自动提取运动目标区域。
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