Results 21 to 30 of about 3,306 (207)

Species Abundance in a Forest Community in South China: A Case of Poisson Lognormal Distribution [PDF]

Journal of Integrative Plant Biology, 2005
Abstract: Case studies on Poisson lognormal distribution of species abundance have been rare, especially in forest communities. We propose a numerical method to fit the Poisson lognormal to the species abundance data at an evergreen mixed forest in the Dinghushan Biosphere Reserve, South China.
Zuo-Yun Yin, Hai Ren, Shao-Lin Peng
exaly   +2 more sources

Comparing zero-inflated Poisson, Poisson gamma, and Poisson lognormal regression models in dental health data

Journal of Biostatistics and Epidemiology, 2018
Background & Aim: Statistical modeling is one of the most suitable methods for analyzing the relationship between health and medical issues. In the situation of analysis of zero-inflated data, there are different methods.
Farzaneh Neysari, Abbas Bahrampour, Yunes Jahani Jahani   +2 more
doaj   +1 more source

The powerbend distribution provides a unified model for the species abundance distribution across animals, plants and microbes [PDF]

Nature Communications
Remarkably, almost every ecological community investigated to date is composed of many rare species and a few abundant species. While the precise nature of this species abundance distribution is believed to reflect fundamental ecological principles ...
Yingnan Gao, Ahmed Abdullah, Martin Wu
doaj   +2 more sources

Multivariate Poisson-Lognormal Model for Analysis of Crashes on Urban Signalized Intersections Approach

Journal of Transportation Safety & Security, 2017
ABSTRACTMany studies investigate contributing factors of intersection crashes, but very limited studies focus on cashes on the intersection approach. It is important to address the characteristics of intersection-approach crashes to better understand intersection safety.
Zhao, Mo, Liu, Chenhui, Li, Wei, Sharma, Anuj   +3 more
openaire   +4 more sources

Multivariate Poisson Lognormal model: optimisation, inference and application to high dimensional data

, 2022
En analyse unicellulaire, il est habituel de traiter des observations non gaussiennes de grande dimension. Un exemple typique est la distribution de comptage transcriptomique unicellulaire brute, qui vise à comprendre les covariations entre l'activité de chaque gène (nombre de fois où le gène est exprimé) dans chaque cellule.
Batardière, Bastien, Kwon, Joon, Sansonnet, Laure, Chiquet, Julien   +3 more
openaire   +2 more sources

A produtividade dos autores sobre a lei de Lotka

Ciência da Informação, 2008
Estuda a produção estratificada dos autores produtores da literatura sobre a Lei de Lotka de 1922 a 2003 e analisa essa produtividade através dos modelos Poisson lognormal e Gauss Poisson inversa generalizada.
Ruben Urbizagastegui
doaj   +2 more sources

Methods to evaluate the effectiveness of advanced stop lines for motorcycles in improving road safety

MethodsX, 2021
In Barcelona, Advanced Stop Lines (ASL) for motorcycles, were implemented since 2009. This paper aims to describe the process followed in determining the best statistical model to analyse the effectiveness of ASL in preventing road traffic injury ...
Elena Santamariña-Rubio, Katherine Pérez   +1 more
doaj   +1 more source

Bivariate macro-level safety analysis of non-motorized vehicle crashes and crash-involved road users

Journal of Traffic and Transportation Engineering (English ed. Online), 2022
The high risk of injury resulting from non-motorized vehicle (NMV) crashes has created the goal of using the 3E strategy to comprehensively improve NMV safety.
Zhicheng Dai, Xuesong Wang
doaj   +1 more source

Bayesian Estimation of Parameters Correlation of Bivariate Poisson Distribution [PDF]

فصلنامه پژوهش‌های اقتصادی ایران, 2016
In this study, based on Bayesian Generalized Linear Models, correlation between the parameters of two Poisson distributions was computed. Due to lack of the closed form for posterior distribution, hierarchical Bayesian statistics using the Metropolis ...
Farzad Eskandari
doaj   +1 more source

Exploring the Spatiotemporal Characteristics of COVID-19 Infections among Healthcare Workers: A Multi-Scale Perspective

ISPRS International Journal of Geo-Information, 2021
The outbreak of COVID-19 has constantly exposed health care workers (HCWs) around the world to a high risk of infection. To more accurately discover the infection differences among high-risk occupations and institutions, Hubei Province was taken as an ...
Hui Ren, Peixiao Wang, Wei Guo, Xinyan Zhu   +3 more
doaj   +1 more source