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For high resolution radar at low grazing angles, the existence of strong sea spikes leads to long tails in the amplitude distribution of sea clutter. The accurate modeling of sea clutter amplitude distribution in the presence of sea spikes is the main contribution of this paper. Considering the impulsive nature of sea spike events, the generalized extreme value (GEV) distribution, which originated...
As a generalization of the classical Fourier Transform (FT), the Fractional Fourier Transform (FRFT) has many applications in several fields, such as optics and signal processing. In this paper, the scaling property of the FRFT spectrum is studied in depth and the approximate similarity between the FRFT spectra is presented. The analytical results show that the approximate similarity can be observed...
A total of 168 PM10 samples were collected during the year of 2005 at eight sites in the city of Wuxi in China. Fifteen chemical elements, three water-soluble ions, total carbon and organic carbon were analyzed. Six source categories were identified and their contributions to ambient PM10 in Wuxi were estimated using a nested chemical mass balance method that reduces the effects of colinearity on...
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