Results 61 to 70 of about 88,814 (288)

Estimating parameters of fluctuations in the cosmic microwave background [PDF]

open access: yes, 1995
We address questions that arise in statistical analyses of recently detected fluctuations in the Cosmic Microwave Background (CMB). Estimators of the quadrupole amplitude, Q, and spectral index, n, of the CMB angular fluctuation power spectrum are ...
Lineweaver, Charles H.   +2 more
core   +4 more sources

Bio‐Orthogonally Crosslinked Supramolecular Polymer Bottlebrush Hydrogels for Long‐Term 3D Cell Culture

open access: yesAdvanced Functional Materials, EarlyView.
Fibrous benzenetrispeptide (BTP) hydrogels, fabricated via strain‐promoted azide‐alkyne cycloaddition (SPAAC) crosslinking, form robust, bioinert networks. These hydrogels can support 3D cell culture, where cell viability and colony growth depend on the fiber content.
Ceren C. Pihlamagi   +5 more
wiley   +1 more source

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

open access: yesپژوهش‌های 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  

Parameter Estimation for the Log-Logistic Distribution Based on Order Statistics

open access: yesRevstat Statistical Journal, 2018
In this paper, we discuss the moments and product moments of the order statistics in a sample of size n drawn from the log-logistic distribution. We provide more compact forms for the mean, variance and covariance of order statistics.
Mohammad Ahsanullah , Ayman Alzaatreh
doaj   +1 more source

Orthogonal Block Structure and Uniformly Best Linear Unbiased Estimators [PDF]

open access: yes, 2019
Models with orthogonal block structure, OBS, have variance covariance matrices that are linear combinations [...]
Ferreira, Sandra S.   +4 more
openaire   +3 more sources

METODE REGRESI RIDGE UNTUK MENGATASI MULTIKOLINIERITAS PADA INDIKATOR KONSTRUKSI DI PROVINSI ACEH [PDF]

open access: yes, 2017
ABSTRAKPenelitian ini dilakukan untuk mengamati hubungan yang terjadi antara indikator-indikator konstruksi (sebagai variabel bebas), dan nilai konstruksi (sebagai variabel tak bebas).
Siti Zakirah
core  

Predicting Atomic Charges in MOFs by Topological Charge Equilibration

open access: yesAdvanced Functional Materials, EarlyView.
An atomic charge prediction method is presented that is able to accurately reproduce ab‐initio‐derived reference charges for a large number of metal–organic frameworks. Based on a topological charge equilibration scheme, static charges that fulfill overall neutrality are quickly generated.
Babak Farhadi Jahromi   +2 more
wiley   +1 more source

Two Kantorovich-type inequalities and efficiency comparisons between the OLSE and BLUE

open access: yesJournal of Inequalities and Applications, 2002
We first establish two matrix-determinant Kantorovich-type inequalities. Then we introduce two efficiency criteria and make efficiency comparisons between the ordinary least squares estimator and best linear unbiased estimator in linear models.
King Maxwell L, Liu Shuangzhe
doaj  

Small Area Estimation Using a Spatio-Temporal Linear Mixed Model

open access: yesRevstat Statistical Journal, 2012
In this paper it is proposed a spatio-temporal area level linear mixed model involving spatially correlated and temporally autocorrelated random effects.
Luís N. Pereira , Pedro S. Coelho
doaj   +1 more source

Alternative Test Procedures and Confidence Intervals on the Common Mean in the Fixed Effects Model for Meta-Analysis [PDF]

open access: yes, 2000
The best linear unbiased estimator of the common mean in heteroscedastic one-way fixed effects model exists only if the values of the variance components are known.
Hartung, Joachim, Makambi, Kepher H.
core   +1 more source

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