摘要
以概率权重矩法估计P-Ⅲ型分布参数需用专门数表,实用上十分不便。本文对该数表建立了近似表达式,从而大大简化了查表和内插运算。验算表明,近似表达式能满足工程运算的精度要求。
A specific table is necessary for Probability Weighted Moments(PWM)to estimate thePearson TypeⅢ distributed parameters.However,the computational procedure with the help of such a table isvery inconvenient in practice. Therefore,some approximate expressions are presented in this paper to simplify thetable look-up and interpolating computation. The verification of the approximate expressions shows that theyhave reached the necessary accuracy for engineering practice.
出处
《水文》
CSCD
北大核心
1994年第3期17-20,共4页
Journal of China Hydrology
关键词
P-Ⅲ型分布
概率权重矩法
参数表
parameter estimating,approximate expression, Pearson Type Ⅲ distribution,probability weighted moments