An efficient solver for cumulative density function-based solutions of uncertain kinematic wave models
An efficient solver for cumulative density function-based solutions of uncertain kinematic wave models
复制标题
不确定运动波模型基于累积密度函数的高效求解器
DOI:
10.1016/j.jcp.2019.01.008
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发表时间:
2019-01
影响因子:
4.1
通讯作者:
Zhu Xueyu
中科院分区:
文献类型:
--
作者:
Cheng Ming;Narayan Akil;Qin Yi;Wang Peng;Zhong Xinghui;Zhu Xueyu
We develop a numerical framework to implement the cumulative density function (CDF) method for obtaining the probability distribution of the system state described by a stochastic kinematic wave model. The approach relies on the computation of the fine-grained CDF equation of system state, as derived by the CDF method, via the method of characteristics. Due to its linearity, the fine-grained CDF equation is solved far more efficiently than the direct simulation of the kinematic wave model. Since the ensemble mean of the fine-grained CDF solutions is the probability distribution of the original system state, the proposed scheme requires less realizations than direct Monte Carlo simulations (MCS) of the kinematic model and thus converges relatively quickly. We verify the accuracy and effectiveness of our procedure via comparisons with direct MCS of several examples, including a particular kinematic wave system, the Saint-Venant equation.
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影响因子:
8.6
作者:
Peng Wang;A. Tartakovsky;D. Tartakovsky
通讯作者:
Peng Wang;A. Tartakovsky;D. Tartakovsky
影响因子:
2.4
作者:
T. Gates;Muhammad A. Al-Zahrani
通讯作者:
T. Gates;Muhammad A. Al-Zahrani
DOI:
--
发表时间:
1996
期刊:
--
影响因子:
--
作者:
T. Gates;Muhammad A. Al-Zahrani
通讯作者:
T. Gates;Muhammad A. Al-Zahrani
DOI:
--
发表时间:
1955
期刊:
--
影响因子:
--
作者:
M. Lighthill;G. Whitham
通讯作者:
M. Lighthill;G. Whitham
影响因子:
5.4
作者:
F. Boso;D. Tartakovsky
通讯作者:
F. Boso;D. Tartakovsky