摘要
以 (单 )权函数法的理论结果为基础 ,不需引入第二权函数 ,通过联解两个超越方程 ,在权函数法的框架下同时解决皮尔逊Ⅲ型 (P Ⅲ )分布的变差系数 (Cv)和偏态系数 (Cs)的估计问题 .计算结果表明 ,修改后的方法统计性能较优 。
A procedure for the estimation of coefficient of variation (Cv) and coefficient of skewness ( Cs ) of a Pearson type of three probability distribution is presented based on the weighted function method (WF). The estimated coefficients are the joint solutions to two transcendental equations. In comparison with the method of moments (MOM) and the method of probability weighted moments (PWM), the proposed method is of good statistical properties, and simple in calculation.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第4期95-98,共4页
Journal of Hohai University(Natural Sciences)
关键词
权函数法
线性矩法
变差系数
偏态系数
水文频率分析法
single, double) weighted function method
method of moments
probability weighted moments
L moments
coefficient of variation
coefficient of skewness
