Results 91 to 100 of about 25,719 (290)

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

Advanced Engineering Materials, EarlyView.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk, Farhan Hossain, Felipe A. Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Classic and Bayes Shrinkage Estimation in Rayleigh Distribution Using a Point Guess Based on Censored Data

پژوهش‌های ریاضی, 2018
Introduction      In classical methods of statistics, the parameter of interest is estimated based on a random sample using natural estimators such as maximum likelihood or unbiased estimators (sample information).
azadeh kiapour
doaj  

Weighted robust improved KL M-estimators for linear regression model in presence of multicollinearity and outliers: simulation and applications

Research in Statistics
In the presence of multicollinearity and outliers, the ordinary least squares (OLS) estimator becomes unstable. In addition, existing ridge and robust ridge estimators tend to become ineffective when there is significant contamination.
Danish Wasim, Qamruz Zaman, Sidra Nawaz, B. M. Golam Kibria   +3 more
doaj   +1 more source

Optimal shrinkage estimation in heteroscedastic hierarchical linear models

, 2015
Shrinkage estimators have profound impacts in statistics and in scientific and engineering applications. In this article, we consider shrinkage estimation in the presence of linear predictors.
Kou, Samuel, Yang, Justin J.
core  

Calibration of shrinkage estimators for portfolio optimization [PDF]

, 2011
Shrinkage estimators is an area widely studied in statistics. In this paper, we contemplate the role of shrinkage estimators on the construction of the investor's portfolio.
Martín Utrera, Alberto, Miguel, Victor de, Nogales, Francisco J.   +2 more
core   +1 more source

Impact of Sustainable Binders Based on Lignin and Collagen on the Volume Stability and Mechanical Properties of MgO‐C Refractories with MgO‐C Recyclates

Advanced Engineering Materials, EarlyView.
Collagen hydrolysate is evaluated as a sustainable binder for MgO‐C refractories. Its thermally induced cross‐linking and gas release lead to expansion and cracking in large bricks, but tailored batches with lignin, recyclates, or fine graphite improve the gas release while thermal treatment and stability.
Till M. J. Stadtmüller, Florian Kerber, Kirsten Moritz, Steffen Dudczig, Konstantin Kraushaar, Thomas Schemmel, Jana Hubálková, Patrick Gehre, Christos G. Aneziris   +8 more
wiley   +1 more source

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  

Improving Confidence Interval Estimation in Logistic Regression with Multicollinear Predictors: A Comparative Study of Shrinkage Estimators and Application to Prostate Cancer Data

Stats
In logistic regression with finite binary samples and multicollinear predictors, the maximum likelihood estimator often results in overfitting and high mean squared error (MSE).
Sultana Mubarika Rahman Chowdhury, Zoran Bursac, B. M. Golam Kibria   +2 more
doaj   +1 more source

On Reliability Estimation for the Exponential Distribution Based on Monte Carlo Simulation

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2018
        This Research deals with estimation the reliability function for two-parameters Exponential distribution, using different estimation methods ; Maximum likelihood, Median-First Order Statistics, Ridge Regression, Modified Thompson-Type Shrinkage ...
Abbas Najim Salman, Taha Anwar Taha
doaj   +1 more source

Estimating household resource shares: A shrinkage approach

Economics Letters, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
TOMMASI D, WOLF A
openaire   +2 more sources