Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11004-015-9611-0 |
BEMMA: A Hierarchical Bayesian End-Member Modeling Analysis of Sediment Grain-Size Distributions | |
Yu, Shi-Yong1,2; Colman, Steven M.2; Li, Linxiong3 | |
通讯作者 | Yu, Shi-Yong |
来源期刊 | MATHEMATICAL GEOSCIENCES
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ISSN | 1874-8961 |
EISSN | 1874-8953 |
出版年 | 2016 |
卷号 | 48期号:6页码:723-741 |
英文摘要 | Sediment grain-size distributions provide rich information about sedimentary dynamics and potentially about environmental and climatic changes. However, entrainment, transport, and deposition, as a sequence of sorting process, modify original grain-size distributions of source materials, thereby resulting in complex distribution forms that are commonly multimodal and asymmetrical. However, neither traditional descriptive statistics nor curving fitting methods are able to address this complexity fully. End-member modeling analysis, essentially based on polytope expansion, stands out as a flexible and robust method for the unmixing of sediment grain-size distributions. Yet there are still several key issues that remain unresolved. Here a hierarchical Bayesian end-member modeling analysis of grain-size distributions, fully subject to the non-negative and unit-sum constraints on the distributions, is presented. Within the Bayesian framework, the number of end members, as well as the end-member spectra and fractions can be inferred sequentially using a reversible-jump Markov chain Monte Carlo algorithm in conjunction with Gibbs samplers. Test runs using both a synthetic and a real-world dataset from a small playa located on the southern margin of the Badain Jaran Desert, NW China, reveal that this model can yield geologically meaningful and mathematically optimal outputs, thereby providing a necessary complement and powerful alternative to the existing deterministic methods. |
英文关键词 | Sediment transport Grain-size distribution End member Unmixing Markov chain Monte Carlo |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000379554800005 |
WOS关键词 | LAKE DONGGI CONA ; COMPOSITIONAL DATA ; POLYMODAL SEDIMENTS ; TIBETAN PLATEAU ; LOGRATIO TRANSFORMATION ; TRANSPORT ; CHINA ; ENVIRONMENTS ; VARIABILITY ; SENSITIVITY |
WOS类目 | Geosciences, Multidisciplinary ; Mathematics, Interdisciplinary Applications |
WOS研究方向 | Geology ; Mathematics |
来源机构 | 兰州大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/195027 |
作者单位 | 1.Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China; 2.Univ Minnesota Duluth, Large Lakes Observ, 2205 East 5th St, Duluth, MN 55812 USA; 3.Univ New Orleans, Dept Math, 2000 Lakeshore Dr, New Orleans, LA 70148 USA |
推荐引用方式 GB/T 7714 | Yu, Shi-Yong,Colman, Steven M.,Li, Linxiong. BEMMA: A Hierarchical Bayesian End-Member Modeling Analysis of Sediment Grain-Size Distributions[J]. 兰州大学,2016,48(6):723-741. |
APA | Yu, Shi-Yong,Colman, Steven M.,&Li, Linxiong.(2016).BEMMA: A Hierarchical Bayesian End-Member Modeling Analysis of Sediment Grain-Size Distributions.MATHEMATICAL GEOSCIENCES,48(6),723-741. |
MLA | Yu, Shi-Yong,et al."BEMMA: A Hierarchical Bayesian End-Member Modeling Analysis of Sediment Grain-Size Distributions".MATHEMATICAL GEOSCIENCES 48.6(2016):723-741. |
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