Results 31 to 40 of about 316,835 (263)

Integrating uncertainty in time series population forecasts: An illustration using a simple projection model

open access: yesDemographic Research, 2013
Background: Population forecasts are widely used for public policy purposes. Methods to quantify the uncertainty in forecasts tend to ignore model uncertainty and to be based on a single model.
Guy J. Abel   +5 more
doaj   +1 more source

subtee: An R Package for Subgroup Treatment Effect Estimation in Clinical Trials

open access: yesJournal of Statistical Software, 2021
The investigation of subgroups is an integral part of randomized clinical trials. Exploration of treatment effect heterogeneity is typically performed by covariate-adjusted analyses including treatment-by-covariate interactions.
Nicolas M. Ballarini   +3 more
doaj   +1 more source

jModelTest: Phylogenetic Model Averaging [PDF]

open access: yesMolecular Biology and Evolution, 2008
jModelTest is a new program for the statistical selection of models of nucleotide substitution based on "Phyml" (Guindon and Gascuel 2003. A simple, fast, and accurate algorithm to estimate large phylogenies by maximum likelihood. Syst Biol. 52:696-704.).
openaire   +2 more sources

AVERAGING PROPERTIES AND SPREADING MODELS [PDF]

open access: yesJournal of the Korean Mathematical Society, 2005
The authors characterize Banach--Saks properties in Banach spaces in terms of spreading models. Theorem~1 is the well-known result [see, e.g., \textit{B.~Beauzamy} and \textit{J.--T.\ Lapresté}, ``Modèles étalés des espaces de Banach'' (Travaux en Cours, Hermann, Paris) (1984; Zbl 0553.46012)]) that \(X\) has the weak Banach--Saks property iff no ...
Cho, Kyugeun, Lee, Chongsung
openaire   +2 more sources

MFEAM: Multi-View Feature Enhanced Attention Model for Image Captioning

open access: yesApplied Sciences
Image captioning plays a crucial role in aligning visual content with natural language, serving as a key step toward effective cross-modal understanding. Transformer has become the dominant language model in image captioning.
Yang Cui, Juan Zhang
doaj   +1 more source

A Comparison of Model Averaging Techniques to Predict the Spatial Distribution of Soil Properties

open access: yesRemote Sensing, 2022
This study tested and evaluated a suite of nine individual base learners and seven model averaging techniques for predicting the spatial distribution of soil properties in central Iran.
Ruhollah Taghizadeh-Mehrjardi   +5 more
doaj   +1 more source

Optimal Model Averaging for Semiparametric Partially Linear Models with Censored Data

open access: yesMathematics, 2023
In the past few decades, model averaging has received extensive attention, and has been regarded as a feasible alternative to model selection. However, this work is mainly based on parametric model framework and complete dataset.
Guozhi Hu, Weihu Cheng, Jie Zeng
doaj   +1 more source

The Combined Effect of Obesity and Contraceptive Use on Pulmonary Embolism in Adolescent Females Residing in the United States

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Combined oral contraceptive (COC) use in obese adult women dramatically increases the relative risk of developing a pulmonary embolism (PE). The risk of a PE in obese adolescent females taking contraceptives is currently unknown. The purpose of this investigation was to determine the effect of body mass index (BMI) and contraceptive
John Puetz, Joanne Salas
wiley   +1 more source

Two-Population Mortality Forecasting: An Approach Based on Model Averaging

open access: yesRisks
The analysis of residual life expectancy evolution at retirement age holds great importance for life insurers and pension schemes. Over the last 30 years, numerous models for forecasting mortality have been introduced, and those that allow us to predict ...
Luca De Mori   +3 more
doaj   +1 more source

Bagged Averaging of Regression Models [PDF]

open access: yes, 2006
Linear regression and regression tree models are among the most known regression models used in the machine learning community and recently many researchers have examined their sufficiency in ensembles. Although many methods of ensemble design have been proposed, there is as yet no obvious picture of which method is best.
Sotiris B. Kotsiantis   +2 more
openaire   +1 more source

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