| 示踪实验确定河流纵向离散系数的单纯形加速法 |
| 摘要点击 1100 全文点击 1136 修订日期：1993-07-26 |
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| 中文关键词 河流水质模型 参数估计 纵向离散系数 单纯形加速法 |
| 英文关键词 river water quality model parameterestimation longitudinal dispersion coefficient accelerated simplex algorithm |
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| 中文摘要 |
| 应用单纯形加速法结合实例求出福建闽江干流富屯溪洋口段纵向离散系数DL=2.62m2/s.研究结果表明,该法用于估计非线性模型参数优于"非线性逼近法".由于单纯形法寻优过程不需要计算目标函数的偏导数,不受模型复杂程度的限制,因而计算简便,可广泛应用于环境、生态模型的拟合和参数估计。 |
| 英文摘要 |
| The accelerated simplex alsorithm has been used to calculate the longitudinal dispersion coefficient in a river,as an example for which the Ynagkou reaches of the Futunxi River,a mainstream of the Minjiang River in Fujian province, was found to have a longitudinal dispersion coefficient D2 of 2.62 m2/s.The results show that the accelerated simplex algorithm was more effective to be used for evaluating the parameters for a nonlinear model than the nonlinear approach algorithm.This was simply because the accelerated simplex algorithm had a process of optimization in which it was not necessary to calculate the partial derivative of the goal function and was not limited by the complexity of a model so that it was easy to be calculated and widely applicable. This algorithm could be widely used to fit environmental and ecological models and to make parameters evaluation. |
