【摘要】 基于正多面体算法能有效地解决包括带约束的非线性规划的最优化问题在内的各种类型的优化问题,将正多面体方法引入到水文频率计算领域,用来自动获得皮尔逊Ⅲ型分布3个参数E(X),Cv,Cs的最佳估计值,使经验点据尽可能地接近理论曲线,从而取代目估适线,实现了频率参数的自动优化.以洛阳地区水资源评价为例,验证了本文方法在理论和应用研究中取得较好的效果.更多还原

【Abstract】 In consideration of the fact that the regular polyhedron optimization algorithm is effective in solving various optimization problems, including the problem of nonlinear programming under constraint condition, the algorithm is introduced in the calculation of hydrological frequency so as to obtain the optimal values of three parameters,E(X),Cv,and Cs in the Pearson type-III distribution, and make the result of curve fitting of hydrological samples much close to the theoretical probability distribution. The present method realizes the automatic calculation of frequency parameters. In the case study of water resources evaluation for Luoyang City, the effectiveness of the method in theoretical study and practical application is verified.更多还原