Results 251 to 260 of about 3,008,496 (291)
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Iterative Projection Algorithms for Ab Initio Phasing in Virus Crystallography
Journal of Structural Biology, 2016Iterative projection algorithms are proposed as a tool for ab initio phasing in virus crystallography. The good global convergence properties of these algorithms, coupled with the spherical shape and high structural redundancy of icosahedral viruses, allows high resolution phases to be determined with no initial phase information.
Richard Kingston, Rick P Millane
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Iterative Projection Algorithms in Protein Crystallography. I. Theory
Acta Crystallographica Section A: Foundations and Advances, 2013A general class of iterative projection algorithms is described and proposed as a tool for phasing in protein crystallography in order to improve the radius of convergence over that of conventional density-modification algorithms. Their relationship to conventional density modification is described.
Rick P Millane, R P Millane
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An Improved Iterative Back Projection Algorithm Based on Ringing Artifacts Suppression
Neurocomputing, 2015In order to suppress and reduce the ringing artifacts of the IBP super resolution algorithm, an improved iterative back projection (IBP) reconstruction algorithm is presented in this paper. Firstly, two novel concepts, variation and local variance variation based on an adaptive analysis are introduced.
Ruigang Yang, Xin Yang
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A Projection Iterative Algorithm Boundary Element Method for the Signorini Problem
Engineering Analysis With Boundary Elements, 2013 International audienceWe propose a projection iterative algorithm based on a fixed point equation for solving a certain class of Signorini problem. The satisfaction of the Signorini boundary conditions is verified in a projection iterative manner, and at
Shougui Zhang, Jialin Zhu
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Iterative Projection Approximation Algorithms for PCA
2006 IEEE International Conference on Acoustics Speed and Signal Processing Proceedings, 2006In this paper we introduce a new error measure, integrated reconstruction error (IRE), the minimization of which leads to principal eigenvectors (without rotational ambiguity) of the data covariance matrix. Then we present iterative algorithms for the IRE minimization, through the projection approximation.
Seungjin Choi +2 more
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Characteristics of iterative projection algorithms
SPIE Proceedings, 2012A brief description of various iterative projection algorithms and the relationships between them is given, along with some possible reasons for their ability to solve non-convex problems. An empirical model of their behaviour when applied to non-convex problems is also described.
Victor Lo, Rick P. Millane
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Iterative Project Quasi-Newton Algorithm for Training RBM
Proceedings of the AAAI Conference on Artificial Intelligence, 2016The restricted Boltzmann machine (RBM) has been used as building blocks for many successful deep learning models, e.g., deep belief networks (DBN) and deep Boltzmann machine (DBM) etc. The training of RBM can be extremely slow in pathological regions.
Shuai Mi +5 more
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An iterative algorithm for the projective registration of free form surfaces
Proceedings 2000 International Conference on Image Processing (Cat. No.00CH37101), 2002In this paper we present a novel image registration algorithm combining the iterative closest point algorithm with focus of expansion theory for 3D-2D projective registration of free-form surfaces. A pure translational camera configuration is used, which is a widely adopted constraint to structural estimation.
Yonghuai Liu, Marcos A. Rodrigues 0001
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Belief Propagation, Dykstra's Algorithm, and Iterated Information Projections
IEEE Transactions on Information Theory, 2010Belief propagation is shown to be an instance of a hybrid between two projection algorithms in the convex programming literature: Dykstra's algorithm with cyclic Bregman projections and an alternating Bregman projections algorithm. Via this connection, new results concerning the convergence and performance of belief propagation can be proven by ...
John MacLaren Walsh, Phillip A. Regalia
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An iteratively approximated gradient projection algorithm for sparse signal reconstruction
Applied Mathematics and Computation, 2014zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhongyi Liu, Zhihui Wei, Wenyu Sun
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