Results 21 to 30 of about 24,946,429 (302)

A Bayesian semiparametric latent variable model for mixed responses [PDF]

open access: yes, 2006
In this article we introduce a latent variable model (LVM) for mixed ordinal and continuous responses, where covariate effects on the continuous latent variables are modelled through a flexible semiparametric predictor. We extend existing LVM with simple
Raach, Alexander, Fahrmeir, Ludwig
core   +1 more source

Linear mixed-effects model for longitudinal complex data with diversified characteristics

open access: yesJournal of Management Science and Engineering, 2020
The increasing richness of data encourages a comprehensive understanding of economic and financial activities, where variables of interest may include not only scalar (point-like) indicators, but also functional (curve-like) and compositional (pie-like ...
Zhichao Wang   +4 more
doaj   +1 more source

How to use live sampling tissues and archived specimens in cetacean stable isotope research

open access: yesWater Biology and Security, 2023
Cetaceans are unique ecological engineers, and their restoration may have a crucial impact on the future structure of aquatic ecosystems, which calls for more investigations into their trophic ecology.
Tao Jin   +9 more
doaj   +1 more source

Genotype Selection for Grain Yield of Sorghum through Generalized Linear Mixed Model

open access: yesAgronomy, 2023
The classical model only provides a correct analysis if all the effects are fixed. For experiments that include fixed and random effects, the general linear mixed model is appropriate for handling the non-normal distributed response variables. The aim of
Mulugeta Tesfa   +4 more
doaj   +1 more source

Variable Selection for Generalized Linear Mixed Models by L1-Penalized Estimation [PDF]

open access: yes, 2011
Generalized linear mixed models are a widely used tool for modeling longitudinal data. However, their use is typically restricted to few covariates, because the presence of many predictors yields unstable estimates.
Groll, Andreas, Tutz, Gerhard
core   +3 more sources

A variance shilf model for outlier detection and estimation in linear and linear mixed models [PDF]

open access: yes, 2008
Includes abstract.Includes bibliographical references.Outliers are data observations that fall outside the usual conditional ranges of the response data.They are common in experimental research data, for example, due to transcription errors or faulty ...
Gumedze, Freedom Nkhululeko
core   +1 more source

Estimating basis functions in massive fields under the spatial mixed effects model [PDF]

open access: yes, 2021
Spatial prediction is commonly achieved under the assumption of a Gaussian random field by obtaining maximum likelihood estimates of parameters, and then using the kriging equations to arrive at predicted values.
Pazdernik, Karl, Maitra, Ranjan
core  

Linear Mixed Model for Genotype Selection of Sorghum Yield

open access: yesApplied Sciences, 2023
Data analysis using the General linear model assumes the factors to be fixed effects, and the BLUE method, which is based on their mean performance, is appropriate to select the best performing genotypes.
Mulugeta Tesfa   +4 more
doaj   +1 more source

Model Fitness and Predictive Accuracy in Linear Mixed-Effects Models with Latent Clusters

open access: yesJournal of Nigerian Society of Physical Sciences, 2023
In clustered data, observations within a cluster show similarity between themselves because they share common features different from observations in the other clusters.
Waheed B. Yahya   +2 more
doaj   +1 more source

A mixed model approach for structured hazard regression [PDF]

open access: yes, 2004
The classical Cox proportional hazards model is a benchmark approach to analyze continuous survival times in the presence of covariate information. In a number of applications, there is a need to relax one or more of its inherent assumptions, such as ...
Thomas Kneib   +4 more
core   +1 more source

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