Use of the Beta-Dagum and Beta-Singh-Maddala distributions for modeling hydrologic data     

Filippo?Domma  Francesca?CondinoEmail authorView author&#;s OrcID profile 《Stochastic Environmental Research and Risk Assessment (SERRA)》2017,31(3):799-813

Starting from a recent paper by Murshed (Stoch Environ Res Risk Assess 25:897–911, 2011) in which a good performance of the Beta-k distribution in analyzing extreme hydrologic events is shown, in this paper, we propose the use of two new four-parameters distribution functions strongly related to the Beta-k distribution, namely the Beta-Dagum and the Beta-Singh-Maddala distributions. More in detail, the new distributions are a generalization of a reparametrization of Beta-k and Beta-p distributions, respectively. For these distributions some particular interpretations in terms of maximum and minimum of sequences of random variables can be derived and the maximal and minimal domain of attraction can be obtained. Moreover, the method of maximum likelihood, the method of moments and the method of L-moments are examined to estimate the parameters. Finally, two different applications on real data regarding maxima and minima of river flows are reported, in order to show the potentiality of these two models in the extreme events analysis.  相似文献   

Horashim East: a newly discovered Middle Palaeolithic site in central Israel     

Ella Assaf  Viviane Slon  Francesca Romagnoli 《第四纪科学杂志》2022,37(1):1-5

Horashim East is a newly discovered Middle Palaeolithic open-air occurrence in central Israel, revealed during a thematic prehistoric survey. Hundreds of lithic items were found, including an early-stage biface, Levallois cores and products. As only a few open-air settlements are known from the Middle Palaeolithic Levant, the discovery of Horashim East sheds new light on human land-use patterns during this period and reinforces the notion that central-eastern Israel was favourable for human settlement throughout the Palaeolithic.  相似文献