Results 11 to 20 of about 15,789 (130)
Cartesian MaxGIRF: Model-based EPI reconstruction incorporating gradient nonlinearity and concomitant field effects. [PDF]
Magn Reson MedAbstract Purpose Lower field strength scanners with large bore size or complex geometries, and scanners with stronger gradient systems experience increased gradient nonlinearity and concomitant fields, each of which causes distortions in EPI. Current correction approaches based on image‐domain interpolation introduce undesirable spatial blurring.
Lee NG, Cui SX, Nayak KS.
europepmc +2 more sources
International Journal of Robust and Nonlinear Control, EarlyView., 2023 Abstract We propose a hierarchical energy management scheme for aggregating Distributed Energy Resources (DERs) for grid flexibility services. To prevent a direct participation of numerous prosumers in the wholesale electricity market, aggregators, as self‐interest agents in our scheme, incentivize prosumers to provide flexibility. We firstly model the
Xiupeng Chen +3 more
wiley +1 more source
The spectral norms of geometric circulant matrices with the generalized k-Horadam numbers
Journal of Inequalities and Applications, 2018 In this paper, we use the algebra methods, the properties of the r-circulant matrix and the geometric circulant matrix to study the upper and lower bound estimate problems for the spectral norms of a geometric circulant matrix involving the generalized k-
Baijuan Shi
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Lower Bounds on the Bounded Coefficient Complexity of Bilinear Maps [PDF]
, 2002 We prove lower bounds of order $n\log n$ for both the problem to multiply polynomials of degree $n$, and to divide polynomials with remainder, in the model of bounded coefficient arithmetic circuits over the complex numbers.
Buergisser, Peter, Lotz, Martin
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On Circulant Embedding for Gaussian Random Fields in R
Journal of Statistical Software, 2013 The high-dimensionality typically associated with discretized approximations to Gaussian random fields is a considerable hinderance to computationally efficient methods for their simulation.
Tilman M. Davies, David Bryant
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Fast Algorithms for Solving FLS R-Factor Block Circulant Linear Systems and Inverse Problem of AX=b
Abstract and Applied Analysis, 2014 Block circulant and circulant matrices have already become an ideal research area for solving various differential equations. In this paper, we give the definition and the basic properties of FLS R-factor block circulant (retrocirculant) matrix over ...
Zhaolin Jiang
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On the spectral norm of r-circulant matrices with the Pell and Pell-Lucas numbers
Journal of Inequalities and Applications, 2016 Let us define A = C r ( a 0 , a 1 , … , a n − 1 ) $A=C_{r}(a_{0},a_{1},\ldots,a_{n-1})$ to be a n × n $n \times n$ r-circulant matrix. The entries in the first row of A = C r ( a 0 , a 1 , … , a n − 1 ) $A=C_{r}(a_{0},a_{1},\ldots,a_{n-1})$ are a i = P i
Ramazan Türkmen, Hasan Gökbaş
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GPU-Accelerated Algorithms for Compressed Signals Recovery with Application to Astronomical Imagery Deblurring [PDF]
, 2017 Compressive sensing promises to enable bandwidth-efficient on-board compression of astronomical data by lifting the encoding complexity from the source to the receiver.
Fiandrotti, Attilio +3 more
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Zhejiang Daxue xuebao. Lixue ban, 2011 Let n be a positive integer, and Cn(r) be the set of all n× nr-circulant matrices over the Boolean algebra B ={0, 1}, . For any fixed r-circulant matrix C(C≠0) in Gn.
CHENJin-song(陈锦松) +1 more
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IEEE Access, 2020 The Cramér-Rao Bound (CRB) is a powerful tool to assess the performance limits of a parameter estimation problem for a given statistical model. In particular, the Gaussian CRB (i.e., the CRB obtained assuming the data are Gaussian) corresponds to
Mohamed Nait-Meziane +3 more
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