1,721,052 research outputs found
Stationarity, autocorrelation and the multivariate case: generalisations of the disaggregation scheme with wavelets.
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Scale dependency and fractal dimension of rarity
No full textThe rarity of species in a country is usually determined by counting the number of grid cells occupied by those species on a geographical observation grid. In this paper, we present a measure of rarity that is less sensitive to the shape and size of a country. We demonstrate that the distribution of species on a national grid is not monofractal. Consequently, rarity figures cannot be scaled down to a finer grid merely using scale-area plots. We propose a downscaling method that takes into account the non-monofractal distribution of species. Rarity figures have often been published on a scale comprising a limited number of rarity classes. This article finally provides an insight into the degree of accuracy of such classes
Verslag van de buitenlandse excursie Hydrologie naar de landendriehoek Frankrijk, Duitsland en Luxemburg : 30 augustus tot 5 september 1998
No full textSensitivity of output covariance to non-second order properties of the input in the case of unsaturated zone models.
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