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Kee‐Won Seong 《水文研究》2014,28(6):2881-2896
A general form of formula is presented for the rainfall Intensity–Duration–Frequency (IDF) relationship. This formula is derived from the nearly normal probability distribution function of transformed intensities. In order to transform the raw intensities, a correcting non‐constant spread technique, the Kruskal–Wallis statistic, and the Box–Cox transformation are adopted. These transformations enable to express a simpler model for the IDF formula that agrees well with traditional IDF relationships. Since the proposed method allows the estimation of any percentile value of intensities with a single equation, the intensity percentile at arbitrary duration can be generated easily. The validity of the formula derived by means of the proposed method is assessed using data from major weather stations in Korea. The results show that the percentile intensities produced using the proposed method are in good agreement with those of traditional frequency analysis. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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毕创 《测绘与空间地理信息》2020,(4):222-224
DMCⅢ航空数码相机采用了新型的面阵CMOS传感器代替了原来的CCD传感器,导致影像亮度不平衡,严重影响了后期的空三加密工作。Wallis匀光算法主要用于多幅影像间的差异调整,能够有效地解决DMCⅢ影像的质量问题。本文详细地阐述了DMCⅢ影像的Wallis匀光算法,并结合实例进行验证,匀光效果理想。 相似文献