With the increasingly enhancement of global warming and human activities, the spatial-temporal distribution of water resource has obviously changed.

随着全球气候变化和人类活动的日益增强，水资源的时空分布正在发生着明显的改变。

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Then, the edge enhancement gains are evaluated according to the noise distributions on the spatial-frequency domain;

依据统计特性来估计噪声在空频域上的分布，并依此构造具有空频自适应性的边缘增强增益；

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Then, the edge enhancement gains are evaluated according to the noise distributions on the spatial-frequency domain;

依据统计特性来估计噪声在空频域上的分布，并依此构造具有空频自适应性的边缘增强增益；

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