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arXiv 2108.13403stat.ME
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基于随机Bernstein多项式的成分数据相依贝叶斯非参数建模

Dependent Bayesian nonparametric modeling of compositional data using random Bernstein polynomials

Claudia Wehrhahn, Andrés F. Barrientos, Alejandro Jara

摘要:

我们讨论贝叶斯非参数程序的回归分析的组成的反应,即数据支持的多元单纯形。该程序是基于一个修改后的类的多元伯恩斯坦多项式和依赖的棒断裂过程的使用。一般模型和两个简化版本的一般模型进行了讨论。吸引力的理论性质,如连续性,关联结构,支持,和一致性的后验分布建立。此外,我们利用尖峰和板坯先验的使用,选择最适合底层真实数据生成分布的复杂性的模型版本。所提出的模型的性能示出在模拟研究和应用程序从哥伦比亚的固体废物数据。

英文摘要:

We discuss Bayesian nonparametric procedures for the regression analysis of compositional responses, that is, data supported on a multivariate simplex. The procedures are based on a modified class of multivariate Bernstein polynomials and on the use of dependent stick-breaking processes. A general model and two simplified versions of the general model are discussed. Appealing theoretical properties such as continuity, association structure, support, and consistency of the posterior distribution are established. Additionally, we exploit the use of spike-and-slab priors for choosing the version of the model that best adapts to the complexity of the underlying true data-generating distribution. The performance of the proposed model is illustrated in a simulation study and in an application to solid waste data from Colombia.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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