Results 21 to 30 of about 676,778 (198)

Preconditioned Iterative Methods for Weighted Toeplitz Least Squares Problems [PDF]

open access: yesSIAM Journal on Matrix Analysis and Applications, 2006
We consider the iterative solution of weighted Toeplitz least squares problems. Our approach is based on an augmented system formulation. We focus our attention on two types of preconditioners: a variant of constraint preconditioning, and the Hermitian/skew-Hermitian splitting (HSS) preconditioner.
Benzi, Michele, Ng, Michael K.
openaire   +2 more sources

Improved weighted least-squares phase unwrapping method for interferometric SAR processing

open access: yesThe Journal of Engineering, 2019
Based on the study of existed least-squares and weighted least-squares phase unwrapping methods, an improved weighted least-squares algorithm based on unwrapping phase error compensation is proposed.
Yu Hui   +5 more
doaj   +1 more source

Robust GPS/INS/DVL Navigation and Positioning Method Using Adaptive Federated Strong Tracking Filter Based on Weighted Least Square Principle

open access: yesIEEE Access, 2019
Multi-sensor integrated positioning technique that combines complementary features of the global positioning system (GPS) and inertial navigation system (INS) for navigation in challenging urban environments has been a hot research area.
Hailiang Xiong   +3 more
doaj   +1 more source

Exponential Transformed Inverse Rayleigh Distribution: Statistical Properties and Different Methods of Estimation

open access: yesAustrian Journal of Statistics, 2022
In this article a generalization of the inverse Rayleigh distribution has been addressed by using DUS transformation, named as Exponential Transformed Inverse Rayleigh (ETIR) distribution.
Proloy Banerjee, Shreya Bhunia
doaj   +1 more source

Adaptive Approximation by Optimal Weighted Least-Squares Methods [PDF]

open access: yesSIAM Journal on Numerical Analysis, 2019
the version of the manuscript accepted for ...
openaire   +4 more sources

Problems in Modelling Charge Output Accelerometers

open access: yesMetrology and Measurement Systems, 2016
The paper presents major issues associated with the problem of modelling change output accelerometers. The presented solutions are based on the weighted least squares (WLS) method using transformation of the complex frequency response of the sensors. The
Tomczyk Krzysztof
doaj   +1 more source

Nonparametric Regression Model for Longitudinal Data with Mixed Truncated Spline and Fourier Series

open access: yesAbstract and Applied Analysis, 2020
Existing literature in nonparametric regression has established a model that only applies one estimator to all predictors. This study is aimed at developing a mixed truncated spline and Fourier series model in nonparametric regression for longitudinal ...
Made Ayu Dwi Octavanny   +3 more
doaj   +1 more source

Evaluation of estimation methods for parameters of the probability functions in tree diameter distribution modeling [PDF]

open access: yesEnvironmental Resources Research, 2020
One of the most commonly used statistical models for characterizing the variations of tree diameter at breast height is Weibull distribution. The usual approach for estimating parameters of a statistical model is the maximum likelihood estimation ...
M. Teimouri   +2 more
doaj   +1 more source

Forecasting technology costs via the Learning Curve - Myth or Magic? [PDF]

open access: yes, 2006
To further our understanding of the effectiveness of learning or experience curves to forecast technology costs, a statistical analysis using historical data has been carried out.
Alberth, Stephan
core   +2 more sources

Comparative analysis between themaxent and the weighted least square shape functions in acollocation meshless method [PDF]

open access: yes, 2017
En el presente artículo se analiza el comportamiento de la función de forma basada en el principio de máxima entropía (maxent), en el contexto de un método sin malla con un esquema de colocación, comparando su resultado con la función de forma ...
Marchant, F.   +1 more
core   +2 more sources

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