Results 101 to 110 of about 25,682 (291)

Estimate The Mean of Normal Distribution Via Preliminary Test Shrinkage Technique

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
 This paper is concerned with preliminary test single stage shrinkage estimators for the mean (q) of normal distribution with known variance s2 when a prior estimate (q0) of the actule value (q) is available, using specifying shrinkage weight factor y( )
S. T. Abdulrahman
doaj  

Objective Bayesian Estimators for the Right Censored Rayleigh Distribution

Revstat Statistical Journal, 2016
The Rayleigh distribution, serving as a special case of the Weibull distribution, is known to have wide applications in survival analysis, reliability theory and communication engineering.
J.T. Ferreira , A. Bekker , M. Arashi
doaj   +1 more source

Engineering Deformation and Failure in Diamond Triply Periodic Minimal Surface Lattices via 3D Wall‐Thickness Grading

Advanced Engineering Materials, EarlyView.
The work demonstrates that strategic wall‐thickness grading in diamond triply periodic minimal surface lattices enables precise tuning of deformation and failure behavior under compression. Different gradation patterns guide how and where the structure collapses, improving energy absorption or promoting controlled brittle failure.
Giovanni Rizza, Danilo Bruson, Manuela Galati, Luca Iuliano   +3 more
wiley   +1 more source

On shrinkage covariance estimators: how inefficient is 1/N strategy of covariance estimation for portfolio selection in foreign exchange market?

Cogent Economics & Finance
We investigate portfolio selection performance as in Markowitz by evaluating variance matrix estimation criteria in the currency market. This study challenges theoretically rigorous shrinkage covariance estimators using multiple evaluation metrics ...
Muhammad Husnain, Shamrez Ali, Qaiser Munir, Ammar Jreisat   +3 more
doaj   +1 more source

Shrinkage estimation of non-negative mean vector with unknown covariance under balance loss

Journal of Inequalities and Applications, 2018
Parameter estimation in multivariate analysis is important, particularly when parameter space is restricted. Among different methods, the shrinkage estimation is of interest.
Hamid Karamikabir, Mahmoud Afshari, Mohammad Arashi   +2 more
doaj   +1 more source

A new class of efficient and debiased two-step shrinkage estimators: method and application. [PDF]

J Appl Stat, 2022
Qasim M, Månsson K, Sjölander P, Kibria BMG.   +3 more
europepmc   +1 more source

An extended class of minimax generalized Bayes estimators of regression coefficients

, 2008
We derive minimax generalized Bayes estimators of regression coefficients in the general linear model with spherically symmetric errors under invariant quadratic loss for the case of unknown scale. The class of estimators generalizes the class considered
Abramowitz, Alam, Efron, Kubokawa, Maruyama, Maruyama, Maruyama, Maruyama, Robert, Wells, William E. Strawderman, Yuzo Maruyama   +11 more
core   +1 more source

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

Advanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu, Giovanni Gammaitoni, Michael Häfner, Eduardo Villalobos‐Portillo, Carlo Marini, Matteo Bianchini   +5 more
wiley   +1 more source

Some Shrinkage estimators based on median ranked set sampling. [PDF]

J Appl Stat, 2021
Ebegil M, Özdemir YA, Gökpinar F.
europepmc   +1 more source

Preliminary test and Stein-type shrinkage LASSO-based estimators [PDF]

, 2018
Peer ...
Arashi, Mohammad, Norouzirad, Mina
core