Results 31 to 40 of about 849,250 (242)

Computational algebraic methods in efficient estimation

, 2014
A strong link between information geometry and algebraic statistics is made by investigating statistical manifolds which are algebraic varieties. In particular it it shown how first and second order efficient estimators can be constructed, such as bias ...
AP Dawid, B Efron, B Huber, DQ Naiman, G Pistone, H Gehrmann, H Weyl, J Verschelde, RC Rao, S Amari, S Andersson, S Kuriki, TL Lee, TY Li   +13 more
core   +1 more source

Solving some special cases of monomial ratio equations appearing frequently in physical and engineering problems [PDF]

, 2016
We first show that monomial ratio equations are not only very common in Physics and Engineering, but the natural type of equations in many practical problems. More precisely, in the case of models involving scale variables if the used formulas are not of
Castillo Ron, Enrique, Lozano Galant, José Antonio, Nogal Macho, María, Turmo Coderque, José   +3 more
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Risk factors for diarrhea in a cohort of dairy heifer calves reared in individual outdoor hutches in Piraí, Rio de Janeiro, Brazil

Semina: Ciências Agrárias, 2016
This study aimed to evaluate the association between diarrhea and risk factors potentially related to diarrhea incidence, such as Cryptosporidium, Giardia, Eimeria and nematode infection, animal age, failure to transfer passive immunity, type of ...
Thais Ferreira Fagundes, Letícia Gabriela Poblete Vidal, Pedro Afonso Moreira Alves, Wagner de Souza Tassinari, Rita de Cássia Alves Alcântara de Menezes, Adevair Henrique da Fonseca, Maria Julia Salim Pereira   +6 more
doaj   +1 more source

Inference on locally ordered breaks in multiple regressions [PDF]

, 2017
We consider issues related to inference about locally ordered breaks in a system of equations, as originally proposed by Qu and Perron (2007 Qu, Z., Perron, P. (2007). Estimating and testing structural changes in multivariate regressions. Econometrica 75:
Li, Ye, Perron, Pierre
core   +1 more source

Automatic Debiased Machine Learning of Causal and Structural Effects

, 2020
Many causal and structural effects depend on regressions. Examples include average treatment effects, policy effects, average derivatives, regression decompositions, economic average equivalent variation, and parameters of economic structural models. The
Chernozhukov, Victor, Newey, Whitney K, Singh, Rahul   +2 more
core   +1 more source

Impact of the estimation equation for GFR on population-based prevalence estimates of kidney dysfunction

BMC Nephrology, 2017
Background Estimating equations are recommended by clinical guidelines as the preferred method for assessment of glomerular filtration rate (GFR). The aim of the study was to compare population-based prevalence estimates of decreased kidney function in ...
Pietro Trocchi, Matthias Girndt, Christa Scheidt-Nave, Silke Markau, Andreas Stang   +4 more
doaj   +1 more source

Coarse Brownian Dynamics for Nematic Liquid Crystals: Bifurcation Diagrams via Stochastic Simulation [PDF]

, 2002
We demonstrate how time-integration of stochastic differential equations (i.e. Brownian dynamics simulations) can be combined with continuum numerical bifurcation analysis techniques to analyze the dynamics of liquid crystalline polymers (LCPs ...
C. I. Siettos, Christodoulou K. N., I. G. Kevrekidis, M. D. Graham   +3 more
core   +1 more source

Full title: prevalence and risk factors of overweight in Beijing infants basing generalized estimating equation: a longitudinal study

BMC Public Health
Background The prevalence of childhood overweight and obesity in China has been rapidly increasing in recent years. The purposes of this study were to investigate the prevalence of infant overweight in Beijing and to explore the influencing factors using
Fang Ye, Jie Chen, Qin Hui, Die Liu, Qi Sun, Jing Liu, Qi Zhang   +6 more
doaj   +1 more source

BB: An R Package for Solving a Large System of Nonlinear Equations and for Optimizing a High-Dimensional Nonlinear Objective Function

Journal of Statistical Software, 2009
We discuss R package BB, in particular, its capabilities for solving a nonlinear system of equations. The function BBsolve in BB can be used for this purpose.
Ravi Varadhan, Paul Gilbert
doaj  

Pathway analysis of rare variants for the clustered phenotypes by using hierarchical structured components analysis

BMC Medical Genomics, 2019
Backgrounds Recent large-scale genetic studies often involve clustered phenotypes such as repeated measurements. Compared to a series of univariate analyses of single phenotypes, an analysis of clustered phenotypes can be useful for substantially ...
Sungyoung Lee, Sunmee Kim, Yongkang Kim, Bermseok Oh, Heungsun Hwang, Taesung Park   +5 more
doaj   +1 more source