Results 41 to 50 of about 12,417,714 (259)

Likelihood ratio tests for fixed model terms using residual maximum likelihood

open access: yes, 1997
Likelihood ratio tests for fixed model terms are proposed for the analysis of linear mixed models when using residual maximum likelihood estimation. Bartlett-type adjustments, using an approximate decomposition of the data, are developed for the test ...
Welham, S. J., Thompson, R.
core   +1 more source

The proportional likelihood ratio order and applications [PDF]

open access: yes, 2001
In this paper, we introduce a new stochastic order between continuous non-negative random variables called the PLR (proportional likelihood ratio) order, which is closely related to the usual likelihood ratio order.
Ramos Romero, H. M., Sordo Díaz, M. A.
core   +2 more sources

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

Third Order Likelihood Inference in the Generalized Exponential Distribution under Progressive Type II Censoring

open access: yesJournal of Statistical Theory and Applications (JSTA)
We consider likelihood inference in the generalized exponential distribution based on progressively type II censored data. The usual likelihood inference procedures do not exist in closed form and therefore large sample likelihood results are often ...
Ayman Baklizi
doaj   +1 more source

Estimation for a Second-Order Jump Diffusion Model from Discrete Observations: Application to Stock Market Returns

open access: yesDiscrete Dynamics in Nature and Society, 2018
This paper proposes a second-order jump diffusion model to study the jump dynamics of stock market returns via adding a jump term to traditional diffusion model. We develop an appropriate maximum likelihood approach to estimate model parameters.
Tianshun Yan   +2 more
doaj   +1 more source

Modeling I(2) Processes Using Vector Autoregressions Where the Lag Length Increases with the Sample Size

open access: yesEconometrics, 2020
In this paper the theory on the estimation of vector autoregressive (VAR) models for I(2) processes is extended to the case of long VAR approximation of more general processes.
Yuanyuan Li, Dietmar Bauer
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

Empirical Likelihood Statistical Inference for the BINAR(1) Process

open access: yesMathematics
In this paper, we apply the empirical likelihood (EL) approach to the bivariate first-order integer-valued autoregressive (BINAR(1)) model. The maximum empirical likelihood (MEL) estimator for this process is constructed by the empirical likelihood ratio
Yan Liu, Yifei Wang, Bo Shao
doaj   +1 more source

A Quantile Regression Model for Bounded Responses Based on the Exponential-Geometric Distribution

open access: yesRevstat Statistical Journal, 2020
The paper first introduces a new two-parameter continuous probability distribution with bounded support from the extended exponential-geometric distribution. Closed-form expressions are given for the moments, moments of the order statistics and quantile
Pedro Jodrá   +1 more
doaj   +1 more source

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

open access: yesFEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui   +4 more
wiley   +1 more source

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