基于数值积分的P-Ⅲ型曲线参数优化估计方法的对比分析  

Comparative Analysis of P-Ⅲ Distribution Parameter Estimation Based on Numerical Integral Frequency Calculation

作　　者：雷冠军[1] 殷峻暹[1] 张丽丽[1] 王文川 

机构地区：[1]中国水利水电科学研究院水资源研究所,北京100038 [2]华北水利水电大学水利学院,河南郑州450000

出　　处：《水文》2018年第1期7-13,共7页Journal of China Hydrology

基　　金：国家重点研发计划项目(2016YFC0401808);河南省高校科技创新团队项目(18IRTSTHN009);国家自然科学基金资助项目(51509088)

摘　　要：用梯形算法、辛普森算法、龙贝格算法、自适应误差积分法进行伽马函数数值积分计算,并运用到水文频率参数的优化计算中,采用智能算法进行寻优,理想数据和实测序列表明,自适应误差积分法具有运算速度快,结果精度高的优点,能够很好地运用到工程实践中。With trapezoidal algorithm, Simpson algorithm, Romberg integration algorithm, adaptive error integration, Gamma function numerical integral calculation is made, which is also applied in optimization calculation of hydrological frequency parameters. And then intelligent algorithm is used for optimization. The ideal data and observed sequences show that the a new adaptive error algorithm has the advantage of fast calculation and high accuracy, so as to be applied to the engineering practice.

关 键 词：数值积分 水文频率分析 自适应误差积分 

分 类 号：P333.9[天文地球—水文科学]