نتایج جستجو برای: simultaneous iterative algorithm

تعداد نتایج: 898977  

Journal: :Journal of Computational and Applied Mathematics 1988

Journal: :bulletin of the iranian mathematical society 0
husain piri department of mathematics, bonab higher education complex hamid vaezi faculty of mathematical sciences university of tabriz, tabriz, iran

begin{abstract} in this paper, we introduce an iterative method for amenable semigroup of non expansive mappings and infinite family of non expansive mappings in the frame work of hilbert spaces. we prove the strong convergence of the proposed iterative algorithm to the unique solution of a variational inequality, which is the optimality condition for a minimization problem. the results present...

2017
Koen Salvo Michel Defrise Johan Nuyts Ahmadreza Rezaei

The ‘Simultaneous Maximum-Likelihood Attenuation Correction Factors’ (sMLACF) algorithm presented here, is an iterative algorithm to calculate the maximum-likelihood (ML) estimate of the activity λ and the attenuation correction factors a in time-of-flight (TOF) positron emission tomography (PET), and this from emission data only. sMLACF is derived using the expectation-maximization (EM) princi...

Journal: :J. Computational Applied Mathematics 2011
Marko D. Petkovic Predrag S. Stanimirovic

An iterative algorithm for estimating the Moore-Penrose generalized inverse is developed. The main motive for the construction of algorithm is simultaneous usage of Penrose equations (2) and (4). Convergence properties of the introduced method are considered as well as their first-order and the second-order error terms. Numerical experience is also presented. AMS Subj. Class.: 15A09.

2014
Rahmat Heidari Maria M. Seron Julio H. Braslavsky Hernan Haimovich

We present a novel state feedback design method for perturbed discrete-time switched linear systems. The method aims at achieving (a) closed-loop stability under arbitrary switching and (b) minimisation of ultimate bounds for specific state components. Objective (a) is achieved by computing state feedback matrices so that the closed-loop A matrices generate a solvable Lie algebra (i.e. admit si...

Journal: :bulletin of the iranian mathematical society 2012
husain piri hamid vaezi

begin{abstract} in this paper, we introduce an iterative method for amenable semigroup of non expansive mappings and infinite family of non expansive mappings in the frame work of hilbert spaces. we prove the strong convergence of the proposed iterative algorithm to the unique solution of a variational inequality, which is the optimality condition for a minimization problem. the results present...

2013
Zhou Yu Lin Fu Debashish Pal Jean-Baptiste Thibault Charles A. Bouman Ken D. Sauer

Model based iterative reconstruction (MBIR) algorithms have been used in clinical studies to allow significant dose reduction in CT scans while maintaining the diagnostic image quality. Simultaneous-update algorithms, which can take advantage of massively parallel computer architectures, are promising to significantly improve the speed of MBIR. To achieve this goal, we also need to improve the ...

M. Abbasi T. Nikazad

In this paper we introduce a sequential block iterative method and its simultaneous version with op-timal combination of weights (instead of convex combination) for solving convex feasibility problems.When the intersection of the given family of convex sets is nonempty, it is shown that any sequencegenerated by the given algorithms converges to a feasible point. Additionally for linear feasibil...

2012
Jörg Stückler Sven Behnke

Fast and robust registration of 3D scans is required in many approaches to perception in robotics such as pose tracking or simultaneous localization and mapping. We propose a novel efficient method to register RGB-D images. We convert the image content into a multi-resolution surfel representation and exploit the dense image neighborhood to construct such views at high frame-rates on a single C...

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