Results 121 to 130 of about 7,599 (306)
AxiomsIn modern survey sampling, particularly when using stratified random sampling (StRS), the existence of outliers and model mis-specifications is a daunting challenge to the conventional parametric and nonparametric methods of estimating parameters.
Rashid Mahmood +3 more
doaj +1 more source
The Calibration of Weights by Calif Tool in the Practice of the Statistical Office of the Slovak Republic [PDF]
Revista Română de Statistică, 2015 The main scope of statistical surveys is to determine sample estimates. If some auxiliary population totals are available, an inferential step could enlarge precision. Calibration estimators are mostly used by statistical agencies.
Róbert Vlačuha, Boris Frankovič
doaj
A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions
Advanced Engineering Materials, EarlyView.This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice +2 more
wiley +1 more source
Sample Survey Calibration: An Informationtheoretic perspective
We show that the pseudo empirical maximum likelihood estimator can be recast as a calibration estimator. The process of estimating the probabilities pk of the distribution function can be done also in a maximum entropy framework.
Martin Wittenberg
core +1 more source
What If... ? Robust Prediction Intervals for Unbalanced Samples
, 2005 A confidence interval is a standard way of expressing our uncertainty about the value of a population parameter. In survey sampling most methods of confidence interval estimation rely on “reasonable” assumptions to be true in order to achieve nominal ...
Chambers, R. L.
core
Calibration estimators for treatment of non response in ratio estimation [PDF]
, 2010 Se propone un estimador de calibración para la estimación de razones en presencia de no respuesta. Las propiedades de sesgo y varianza del estimador en diferentes escenarios de distribución de la población, correlación con variable auxiliar y tasa de no ...
Salamanca Garnica, Ana Milena
core
Advanced Engineering Materials, EarlyView.Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar +2 more
wiley +1 more source
Robust Nonparametric and Semiparametric Model Calibration Estimators by Penalty Function Method
, 2017 Use of nonparametric model calibration estimators for population total and mean has been considered by several authors. In model calibration, a distance measure defined on some design weights thought to be close to the inclusion probabilities, is ...
Kihara, Pius Nderitu
core
Advanced Engineering Materials, EarlyView.A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora +4 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm +3 more
wiley +1 more source