Results 71 to 80 of about 179,319 (288)

A Compressed Sensing Algorithm for Sparse-View Pinhole Single Photon Emission Computed Tomography [PDF]

open access: yes, 2011
Single Photon Emission Computed Tomography (SPECT) systems are being developed with multiple cameras and without gantry rotation to provide rapid dynamic acquisitions.
Schmidt, Taly Gilat   +2 more
core   +1 more source

Level set estimation from projection measurements: Performance guarantees and fast computation

open access: yes, 2013
Estimation of the level set of a function (i.e., regions where the function exceeds some value) is an important problem with applications in digital elevation mapping, medical imaging, astronomy, etc. In many applications, the function of interest is not
Bajwa, Waheed U.   +2 more
core   +1 more source

Shrinking projection method for proximal split feasibility and fixed point problems

open access: yesResults in Nonlinear Analysis, 2019
In this paper, we consider and study proximal split feasibility and fixed point problem. For solving the problems, we introduce an iterative algorithm with shrinking projection technique. It is proven that the sequence generated by the proposed iterative
Jinzuo Chen
doaj  

Improved approximate check polytope projection algorithm of ADMM penalized decoding for LDPC codes in IoTs

open access: yesScientific Reports
The alternating direction method of multipliers (ADMM) penalized decoding method is a popular technology for low-density parity-check (LDPC) codes in Internet of Things (IoT) communications.
Yue Zhao, Biao Wang
doaj   +1 more source

Deconvolution using Fourier Transform phase, ℓ1 and ℓ2 balls, and filtered variation

open access: yesSoftwareX, 2018
In this article, we present a deconvolution software based on convex sets constructed from the phase of the Fourier Transform, bounded ℓ2energy and ℓ1energy of a given image.
Onur Yorulmaz, A. Enis Cetin
doaj   +1 more source

Complex Cryptographic and User‐Centric Physically Unclonable Functions Enabled by Strain‐Sensitive Nanocrystals via Selective Ligand Exchange

open access: yesAdvanced Functional Materials, EarlyView.
This study investigates electromechanical PUFs that improve on traditional electric PUFs. The electron transport materials are coated randomly through selective ligand exchange. It produces multiple keys and a key with motion dependent on percolation and strain, and approaches almost ideal inter‐ and intra‐hamming distances.
Seungshin Lim   +7 more
wiley   +1 more source

A New System of Multivalued Mixed Variational Inequality Problem

open access: yesAbstract and Applied Analysis, 2014
We consider a new system of multivalued mixed variational inequality problem, which includes some known systems of variational inequalities as special cases.
Xi Li, Xue-song Li
doaj   +1 more source

Three‐dimensional Antimony Sulfide Based Flat Optics

open access: yesAdvanced Functional Materials, EarlyView.
This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang   +18 more
wiley   +1 more source

Deterministic Versus Randomized Kaczmarz Iterative Projection [PDF]

open access: yes, 2014
Kaczmarz's alternating projection method has been widely used for solving a consistent (mostly over-determined) linear system of equations Ax=b. Because of its simple iterative nature with light computation, this method was successfully applied in ...
Sekmen, Ali, Wallace, Tim
core   +2 more sources

Distributive Power Control Algorithm for Multicarrier Interference Network over Time-Varying Fading Channels - Tracking Performance Analysis and Optimization

open access: yes, 2010
Distributed power control over interference limited network has received an increasing intensity of interest over the past few years. Distributed solutions (like the iterative water-filling, gradient projection, etc.) have been intensively investigated ...
Cheng, Yong, Lau, Vincent K. N.
core   +2 more sources

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