Results 41 to 50 of about 5,750 (118)

CO-REGISTRATION OF 3D POINT CLOUDS BY USING AN ERRORS-IN-VARIABLES MODEL [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Co-registration of point clouds of partially scanned objects is the first step of the 3D modeling workflow. The aim of co-registration is to merge the overlapping point clouds by estimating the spatial transformation parameters. In the literature, one of
U. Aydar   +3 more
doaj   +1 more source

Self-Consistent Density Estimation in the Presence of Errors-in-Variables

open access: yesAbstract and Applied Analysis, 2014
This paper considers the estimation of the common probability density of independent and identically distributed variables observed with additive measurement errors.
Junhua Zhang, Yuping Hu, Sanying Feng
doaj   +1 more source

Estimation of the mean of the partially linear single-index errors-in-variables model with missing response variables

open access: yesJournal of Inequalities and Applications, 2020
In this paper, we estimate the mean of the partially linear single-index errors-in-variables model with missing response variables. The linear covariate is measured with additive error, therefore missing is not random.
Xin Qi, ZhuoXi Yu
doaj   +1 more source

Recursive parametrical identification of multidimensional linear dynamic systems with local autocorrelated noises in input and output signals

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011
The recursive algorithm allowing to receive strongly consistent estimates of parameters of multidimensional on an input linear dynamic systems with locally autocorrelated noise in input and output signals is suggested.
Dmitriy V Ivanov, Oleg A Katsyuba
doaj  

Value and limitations of intracranial recordings for validating electric field modeling for transcranial brain stimulation

open access: yesNeuroImage, 2020
Comparing electric field simulations from individualized head models against in-vivo intra-cranial recordings is considered the gold standard for direct validation of computational field modeling for transcranial brain stimulation and brain mapping ...
Oula Puonti   +3 more
doaj   +1 more source

On the Interpretation of Instrumental Variables in the Presence of Specification Errors

open access: yesEconometrics, 2015
The method of instrumental variables (IV) and the generalized method of moments (GMM), and their applications to the estimation of errors-in-variables and simultaneous equations models in econometrics, require data on a sufficient number of instrumental ...
P.A.V.B. Swamy   +2 more
doaj   +1 more source

Scaled weighted total least-squares adjustment for partial errors-in-variables model

open access: yesJournal of Geodetic Science, 2016
Scaled total least-squares (STLS) unify LS, Data LS, and TLS with a different choice of scaled parameter. The function of the scaled parameter is to balance the effect of random error of coefficient matrix and observation vector for the estimate of ...
Zhao J.
doaj   +1 more source

Non-negative variance component estimation for the partial EIV model by the expectation maximization algorithm

open access: yesGeomatics, Natural Hazards & Risk, 2020
A difficulty in variance component estimation (VCE) is that the estimates may become negative, which is not acceptable in practice. This article presents two new methods for non-negative VCE that utilize the expectation maximization algorithm for the ...
Leyang Wang, Qiwen Wu
doaj   +1 more source

Factors determining the forecast errors of market analysts for fiscal variables in Brazil

open access: yesRACE: Revista de Administração, Contabilidade e Economia, 2020
The objective of this study is to investigate determinant factors the forecast errors of market analysts for Brazilian fiscal variables. The data for conducting the research was obtained in the Prisma Fiscal, the Ministry of Economy's system of ...
Francisca Aparecida de Souza   +2 more
doaj   +1 more source

Algorithms and statistical analysis for linear structured weighted total least squares problem

open access: yesGeodesy and Geodynamics
Weighted total least squares (WTLS) have been regarded as the standard tool for the errors-in-variables (EIV) model in which all the elements in the observation vector and the coefficient matrix are contaminated with random errors.
Jian Xie   +4 more
doaj   +1 more source

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