Results 31 to 40 of about 5,627,073 (153)

On asymptotic dark energy in string theory

open access: yesJournal of High Energy Physics, 2023
We examine bounds on accelerated expansion in asymptotic regions of the moduli space in string theory compactifications to four spacetime dimensions. While there are conjectures that forbid or constrain accelerated expansion in such asymptotic regions ...
Sera Cremonini   +4 more
doaj   +1 more source

Consequences of Model Misspecification for Maximum Likelihood Estimation with Missing Data

open access: yesEconometrics, 2019
Researchers are often faced with the challenge of developing statistical models with incomplete data. Exacerbating this situation is the possibility that either the researcher’s complete-data model or the model of the missing-data mechanism is ...
Richard M. Golden   +3 more
doaj   +1 more source

Validating a 2-mode asymptotic expansion in computational bifurcation theory (Before introducing HDN for differential operation)

open access: yesNihon Kikai Gakkai ronbunshu, 2015
For error-free computation of high-derivatives of mathematical functions used in engineering applications, hyper-dual numbers (HDN) are receiving much attention in computational mechanics.
Fumio FUJII   +3 more
doaj   +1 more source

Asymptotic Theory of Quantum Channel Estimation

open access: yesPRX Quantum, 2021
The quantum Fisher information (QFI), as a function of quantum states, measures the amount of information that a quantum state carries about an unknown parameter.
Sisi Zhou, Liang Jiang
doaj   +1 more source

Robustness and Efficiency Considerations When Testing Process Reliability with a Limit of Detection

open access: yesMathematics
Processes in biotechnology are considered reliable if they produce samples satisfying regulatory benchmarks. For example, laboratories may be required to show that levels of an undesirable analyte rarely (e.g., in less than 5% of samples) exceed a ...
Laura S. Bumbulis, Richard J. Cook
doaj   +1 more source

Roy Glauber and asymptotic diffraction theory

open access: yesSciPost Physics Proceedings, 2020
This is a review of Glauber's asymptotic diffraction theory, in which diffractive scattering is described in terms of interference between semiclassical amplitudes, resulting from a stationary-phase approximation.
Per Osland
doaj   +1 more source

A New Family of Consistent and Asymptotically-Normal Estimators for the Extremal Index

open access: yesEconometrics, 2015
The extremal index (θ) is the key parameter for extending extreme value theory results from i.i.d. to stationary sequences. One important property of this parameter is that its inverse determines the degree of clustering in the extremes.
Jose Olmo
doaj   +1 more source

New criteria on global asymptotic synchronization of Duffing-type oscillator system

open access: yesNonlinear Analysis, 2020
In this paper, we are concerned with global asymptotic synchronization of Duffing-type oscillator system. Without using matrix measure theory, graph theory and LMI method, which are recently widely applied to investigating global exponential/asymptotic ...
Xuejun Yi, Ling Ren, Zhengqiu Zhang
doaj   +1 more source

Nonlinear wave effects at the non-reflecting beach [PDF]

open access: yesNonlinear Processes in Geophysics, 2012
Nonlinear effects at the bottom profile of convex shape (non-reflecting beach) are studied using asymptotic approach (nonlinear WKB approximation) and direct perturbation theory. In the asymptotic approach the nonlinearity leads to the generation of high-
I. Didenkulova, E. Pelinovsky
doaj   +1 more source

Consistency and asymptotic normality of the maximum likelihood estimator in a zero-inflated generalized Poisson regression [PDF]

open access: yes, 2005
Poisson regression models for count variables have been utilized in many applications. However, in many problems overdispersion and zero-inflation occur.
Min, Aleksey, Czado, Claudia
core   +1 more source

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