Results 41 to 50 of about 617,695 (198)

The polynomial and the Poisson measurement error models: some further results on quasi score and corrected score estimation [PDF]

open access: yes, 2005
The asymptotic covariance matrices of the corrected score, the quasi score, and the simple score estimators of a polynomial measurement error model have been derived in the literature.
Schneeweiß, Hans
core   +2 more sources

On the Approximation of Precision Matrices for Wide-Swath Altimetry

open access: yesRemote Sensing
New observations of ocean surface topography obtained by wide-swath satellite interferometry require new capabilities to process spatially correlated errors in order to assimilate these data into numerical models.
Max Yaremchuk   +2 more
doaj   +1 more source

Sampled-data filtering with error covariance assignment [PDF]

open access: yes, 2001
Copyright [2001] IEEE. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services.
Huang, B, Huo, P, Wang, Z
core   +2 more sources

Directional variance adjustment: bias reduction in covariance matrices based on factor analysis with an application to portfolio optimization. [PDF]

open access: yesPLoS ONE, 2013
Robust and reliable covariance estimates play a decisive role in financial and many other applications. An important class of estimators is based on factor models.
Daniel Bartz   +4 more
doaj   +1 more source

Covariate Balancing With Measurement Error

open access: yesStatistics in Medicine
ABSTRACT In recent years, there is a growing body of causal inference literature focusing on covariate balancing methods. These methods eliminate observed confounding by equalizing covariate moments between the treated and control groups.
Xialing Wen, Ying Yan
openaire   +2 more sources

Low-dimensional representation of error covariance [PDF]

open access: yesTellus A: Dynamic Meteorology and Oceanography, 2000
Ensemble and reduced-rank approaches to prediction and assimilation rely on low-dimensionalapproximations of the estimation error covariances. Here stability properties of the forecast/analysis cycle for linear, time-independent systems are used to identify factors that cause thesteady-state analysis error covariance to admit a low-dimensional ...
Tippett, Michael K.   +3 more
openaire   +2 more sources

Measurement Sensitivity and Estimation Error in Distribution System State Estimation using Augmented Complex Kalman Filter

open access: yesJournal of Modern Power Systems and Clean Energy, 2020
Distribution state estimation (DSE) is an essential part of an active distribution network with high level of distributed energy resources. The challenges of accurate DSE with limited measurement data is a well-known problem.
Alan Louis   +3 more
doaj   +1 more source

SURVIVAL TIME REGRESSION INVOLVING COVARIATE MEASUREMENT ERROR [PDF]

open access: yesBulletin of informatics and cybernetics, 1995
Summary: A class of deconvolution estimators is proposed to estimate the conditional survival, conditional cumulative hazard and the regression functions when the covariate is subject to measurement error. Under appropriate conditions, it is shown that the proposed estimators are consistent, and that they converge weakly to Gaussian processes.
openaire   +2 more sources

Construction of non-diagonal background error covariance matrices for global chemical data assimilation [PDF]

open access: yesGeoscientific Model Development, 2011
Chemical data assimilation attempts to optimally use noisy observations along with imperfect model predictions to produce a better estimate of the chemical state of the atmosphere.
K. Singh   +5 more
doaj   +1 more source

Variational assimilation for xenon dynamical forecasts in neutronic using advanced background error covariance matrix modelling [PDF]

open access: yes, 2013
Data assimilation method consists in combining all available pieces of information about a system to obtain optimal estimates of initial states.
Argaud, Jean-Philippe   +5 more
core   +4 more sources

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