Results 31 to 40 of about 7,710 (298)

Constrained Best Linear Unbiased Estimation

open access: yes, 2017
The least squares (LS) estimator and the best linear unbiased estimator (BLUE) are two well-studied approaches for the estimation of a deterministic but unknown parameter vector. In many applications it is known that the parameter vector fulfills some constraints, e.g., linear constraints.
Lang, Oliver   +2 more
openaire   +2 more sources

An Unbiased Estimator of Gene Diversity with Improved Variance for Samples Containing Related and Inbred Individuals of any Ploidy

open access: yesG3: Genes, Genomes, Genetics, 2017
Gene diversity, or expected heterozygosity (H), is a common statistic for assessing genetic variation within populations. Estimation of this statistic decreases in accuracy and precision when individuals are related or inbred, due to increased dependence
Alexandre M. Harris, Michael DeGiorgio
doaj   +1 more source

On Optimal and Asymptotic Properties of a Fuzzy L2 Estimator

open access: yesMathematics, 2020
A fuzzy least squares estimator in the multiple with fuzzy-input–fuzzy-output linear regression model is considered. The paper provides a formula for the L2 estimator of the fuzzy regression model. This paper proposes several operations for fuzzy numbers
Jin Hee Yoon, Przemyslaw Grzegorzewski
doaj   +1 more source

Best Linear Unbiased Allele‐Frequency Estimation in Complex Pedigrees [PDF]

open access: yesBiometrics, 2004
Summary.  Many types of genetic analyses depend on estimates of allele frequencies. We consider the problem of allele‐frequency estimation based on data from related individuals. The motivation for this work is data collected on the Hutterites, an isolated founder population, so we focus particularly on the case in which the relationships among the ...
Xiaodong Wu   +2 more
openaire   +2 more sources

Prediksi Risiko Sistematik Saham-Saham LQ45 Bursa Efek Indonesia

open access: yesJurnal Ekonomi dan Bisnis, 2016
Beta has been argued, both conceptually as well as empirically. In 1960's, many practitioners used superior advantages in calculation attempted at CAPM theory for investing in asset which has high Beta.
A An Arief Jusuf
doaj   +1 more source

Weighted Moments Estimators of the Parameters for the Extreme Value Distribution Based on the Multiply Type II Censored Sample

open access: yesThe Scientific World Journal, 2013
We propose the weighted moments estimators (WMEs) of the location and scale parameters for the extreme value distribution based on the multiply type II censored sample.
Jong-Wuu Wu   +3 more
doaj   +1 more source

On Generalized Upper(k)Record Values From Weibull Distribution

open access: yesStatistica, 2015
In this paper we study the generalized upper(k)record values arising from Weibull distribution. Expressions for the moments and product moments of those generalized upper(k)record values  are derived.
Jerin Paul, Poruthiyudian Yageen Thomas
doaj   +1 more source

Design-based composite estimation of small proportions in small domains

open access: yesNonlinear Analysis, 2023
Traditional direct estimation methods are inefficient for domains of a survey population with small sample sizes. To estimate the domain proportions, we combine the direct estimators and the regression-synthetic estimators based on domain-level ...
Andrius Čiginas
doaj   +1 more source

All about the ⊥ with its applications in the linear statistical models

open access: yesOpen Mathematics, 2015
For an n x m real matrix A the matrix A⊥ is defined as a matrix spanning the orthocomplement of the column space of A, when the orthogonality is defined with respect to the standard inner product ⟨x, y⟩ = x'y.
Markiewicz Augustyn, Puntanen Simo
doaj   +1 more source

A Blended Sea Ice Concentration Product from AMSR2 and VIIRS

open access: yesRemote Sensing, 2021
An effective blended Sea-Ice Concentration (SIC) product has been developed that utilizes ice concentrations from passive microwave and visible/infrared satellite instruments, specifically the Advanced Microwave Scanning Radiometer-2 (AMSR2) and the ...
Richard Dworak   +3 more
doaj   +1 more source

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