Multimodal Alpha Skew Normal Distribution: A New Distribution to Model Skewed Multimodal Observations

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-12-06 DOI:10.18187/pjsor.v19i4.4232

P. Hazarika, Sricharan Shah, Subrata Chakraborty, M. Alizadeh, G. Hamedani

引用次数: 0

Abstract

Multimodal alpha skew normal (MMASN) distribution is proposed for modelling skewed observations in the presence of multiple modality at arbitrary points. To this end the multimodal skew normal distribution of Chakraborty et al. (2015) is extended by integrating it with alpha skew normal distribution of Elal-Olivero (2010). Cumulative distribution function (cdf), moments, skewness and kurtosis of the proposed distribution are derived in compact form. The data modelling ability of the proposed distribution is checked by considering three multimodal data sets from literature in comparison to some nested and known distributions. Akaike Information Criterion (AIC) and the likelihood ratio (LR) test, both clearly favored proposed model over its nested models as expected.

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多模态阿尔法斜正态分布：为偏斜多模态观测建模的新分布

提出了多模态α偏正态分布(MMASN)，用于在任意点存在多模态时对偏态观测值进行建模。为此，通过将Chakraborty等人(2015)的多模态偏态正态分布与Elal-Olivero(2010)的α偏态正态分布进行积分，扩展了Chakraborty等人(2015)的多模态偏态正态分布。以紧凑形式导出了该分布的累积分布函数(cdf)、矩、偏度和峰度。通过将文献中的三个多模态数据集与一些嵌套分布和已知分布进行比较，验证了所提出分布的数据建模能力。赤池信息准则(Akaike Information Criterion, AIC)和似然比(likelihood ratio, LR)检验结果与预期一致，都明显倾向于建议模型而非嵌套模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.