Results 41 to 50 of about 440,251 (233)
LOGARITHMIC IMAGE’S CONVEXITY IN THE INTEGRAL TRANSFORMS THEORY
Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2020 Background. The method of integral transforms is one of the most important analytical methods of mathematical modeling. Numerical methods and computational algorithms are developed on its basis.
O. E. Yaremko +2 more
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Tomograms and other transforms. A unified view
, 2001 A general framework is presented which unifies the treatment of wavelet-like, quasidistribution, and tomographic transforms. Explicit formulas relating the three types of transforms are obtained.
Ali T +20 more
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Journal of Materials Research and Technology, 2023 In the present work, Ti2AlC/TiAl composites with network architecture were fabricated by the method of spark plasma sintering (SPS) at different temperature using Ti–48Al–2Cr–2Nb pre-alloyed powders and graphene nanosheets (GNSs) as raw materials.
Zhenbo Wang +4 more
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Analysis of Quasi-Cyclic LDPC codes under ML decoding over the erasure channel [PDF]
, 2010 In this paper, we show that Quasi-Cyclic LDPC codes can efficiently accommodate the hybrid iterative/ML decoding over the binary erasure channel. We demonstrate that the quasi-cyclic structure of the parity-check matrix can be advantageously used in ...
Cunche, Mathieu +2 more
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Dispersion Estimates for One-Dimensional Schr\"odinger and Klein-Gordon Equations Revisited [PDF]
, 2016 We show that for a one-dimensional Schr\"odinger operator with a potential whose first moment is integrable the scattering matrix is in the unital Wiener algebra of functions with integrable Fourier transforms.
Egorova, Iryna +3 more
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Matrix Factorization and Some Fast Discrete Transforms
AxiomsIn this paper, three discrete transforms related to vector spaces over finite fields are studied. For our purposes, and according to the properties of the finite fields, the most suitable transforms are as follows: for binary fields, this is the Walsh ...
Iliya Bouyukliev +2 more
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Solving ill-conditioned linear equations using simulated annealing method [PDF]
Journal of Hyperstructures, 2018 The purpose of this paper is to using the Simulated Annealing method to solving a linear equations system which have an ill-conditioned coefficients matrix. A linear equation system is called ill-conditioned if its condition number be large.
Mojtaba Moradi
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Nonlocal PT-symmetric integrable equations and related Riemann–Hilbert problems
Partial Differential Equations in Applied Mathematics, 2021 We aim to discuss about how to construct and classify nonlocal PT-symmetric integrable equations via nonlocal group reductions of matrix spectral problems.
Wen-Xiu Ma
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IEEE Access, 2021 Image transforms are necessary for image and video compression. Analytic transforms are powerful in compacting natural signals for wider exploitation. Various methods have been introduced to represent such data as a small number of bases, and several of ...
Gihwan Lee, Yoonsik Choe
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fastmat: Efficient linear transforms in Python
SoftwareX, 2022 Scientific computing requires handling large linear models, which are often composed of structured matrices. With increasing model size, dense representations quickly become infeasible to compute or store.
Christoph W. Wagner +2 more
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