利用扩展BurrXⅡ分布构建了改进的广义帕累托分布模型-MGPD模型(MelioratedGeneralized ParetoDistributionl,由此得到了地质灾害损失的在险风险值和最大可能损失估计值。以湖南省娄底市地质灾害损失数据实证分析,结果显示:MGPD模型在刻画地质灾害损失数据时,比GPD模型的精度更高,具有更广泛的适用性。
We use the extended Burr XII distribution to build a meliorated Generalized Pareto Distribu- tion model -- MGPD model, and conclude that the estimation of the Value at Risk and maximum loss. The empirical study based on the data of geological disasters in loss of Loudi City in Hunan province shows:MGPD model has higher accuracy than GPD model in describing the data of geological disaster loss, and it has more extensive applicability.