Bayesian learning of Gaussian mixture model for calculating debris flow exceedance probability
Bayesian learning of Gaussian mixture model for calculating debris flow exceedance probability
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计算泥石流超标概率的高斯混合模型的贝叶斯学习
DOI:
10.1080/17499518.2022.2028849
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发表时间:
2022-01
期刊:
影响因子:
--
通讯作者:
Phoon Kok-Kwang
中科院分区:
文献类型:
--
作者:
Deng Qin-Xuan;He Jian;Cao Zi-Jun;Papaioannou Iason;Li Dian-Qing;Phoon Kok-Kwang
ABSTRACT Probabilistic modelling of debris flow data provides useful information for quantitative risk assessment, such as exceedance probabilities (EPs) of debris flow quantities. This task can defy many classical statistical models because debris flow data are frequently collected over years or even decades, and the nonuniformity of the nature and the complex physical mechanism of debris flows lead to multimodal distribution characteristics of observational data. This paper proposes a Bayesian framework for learning Gaussian mixture model (GMM) of debris flow quantities (e.g. total discharge Q total and maximum impact pressure P max) and calculating their EPs for risk-informed decision making. GMM provides great flexibility to fit observation data, but are intrinsically unidentifiable due to the label switching. These computational difficulties are addressed using Random Gibbs Sampling and Bridge Sampling in the proposed framework, allowing incorporating the statistical uncertainty in GMM parameters into EP estimation. Equations are derived for the proposed approach and are illustrated using Q total and P max data at Jiangjia Ravine, China. Results show that the proposed approach identifies a bivariate GMM of Q total and P max reflecting the multimodal characteristics of the observed data and quantifies the statistical uncertainty of GMM parameters. Incorporating the statistical uncertainty into EP estimation provides robust estimates.
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影响因子:
3.3
作者:
L. Marchi;V. D’Agostino
通讯作者:
L. Marchi;V. D’Agostino
DOI:
--
发表时间:
1996
期刊:
--
影响因子:
--
作者:
X. Meng;W. Wong
通讯作者:
X. Meng;W. Wong
影响因子:
3.6
作者:
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通讯作者:
Hui Wang;Xiangrong Wang;J. Wellmann;R. Liang
DOI:
10.1111/1467-9868.00265
发表时间:
2000-01-01
影响因子:
5.8
作者:
Stephens, M
通讯作者:
Stephens, M
DOI:
10.1201/9780429055911-7
发表时间:
2018-12
期刊:
Handbook of Mixture Analysis
影响因子:
--
作者:
G. Celeux;Sylvia Fruewirth-Schnatter;C. Robert
通讯作者:
G. Celeux;Sylvia Fruewirth-Schnatter;C. Robert