Results 31 to 40 of about 273,195 (168)
Two-dimensional local Fourier image reconstruction via domain decomposition Fourier continuation method. [PDF]
PLoS ONE, 2019 The MRI image is obtained in the spatial domain from the given Fourier coefficients in the frequency domain. It is costly to obtain the high resolution image because it requires higher frequency Fourier data while the lower frequency Fourier data is less
Ruonan Shi +2 more
doaj +1 more source
Adaptive Fourier-Galerkin methods
Mathematics of Computation, 2013 We study the performance of adaptive Fourier-Galerkin methods in a periodic box in R d \mathbb {R}^d with dimension d ≥ 1 d\ge 1 . These methods offer unlimited approximation power only restricted by solution and data regularity.
C. Canuto, R. H. Nochetto, VERANI, MARCO
openaire +4 more sources
Non-stationary heat exchange in cylindrical channel at laminar flow of fluids
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013 Using double integral Laplace–Carson transformation and orthogonal method of Bubnov–Galyorkin, the analytical solution of the non-stationary problem of heat transfer in a cylindrical channel in the laminar flow of fluids was obtained. It has two components:
Anton V Eremin +3 more
doaj +1 more source
New method for renormalon subtraction using Fourier transform
Physics Letters B, 2021 To improve accuracy in calculating QCD effects, we propose a method for renormalon subtraction in the context of the operator-product expansion. The method enables subtracting renormalons of various powers in ΛQCD efficiently and simultaneously from ...
Y. Hayashi, Y. Sumino, H. Takaura
doaj +1 more source
Mathematics, 2022 Inhomogeneous elliptical inclusions with partial differential equations have aroused appreciable concern in many disciplines. In this paper, a pseudo-spectral collocation method, based on Fourier basis functions, is proposed for the numerical solutions ...
Xiao Wang +3 more
doaj +1 more source
Solution of Lane-Emden Equation with Fourier Decomposition Method
Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2022 In this article, we tried to get the solution of a class of Lane Emden type equations by using the Fourier Decomposition Method. This method is obtained by using the Fourier transform and the Adomian Decomposition method (FADM) together.
Murat Düz
doaj +1 more source
Topographic solitary waves by the shooting method and Fourier spectral method
Results in Physics, 2020 The influences of topography on barotropic Rossby solitary waves are discussed in this paper. A Boussinesq model equation of nonlinear Rossby wave amplitude is derived by using the perturbation expansion method and the space–time transformation.
Jiaqi Zhang, Ruigang Zhang, Liangui Yang
doaj +1 more source
Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2023 Background. A huge number of mathematical models are called Boussinesq equations; therefore, a wide range of sixth-order Boussinesq equations attracts a lot of attention from outside researchers around the world. Materials and methods.
Araz Salamulla Farajov
doaj +1 more source
Fourier Ptychographic Microscopy via Alternating Direction Method of Multipliers
Cells, 2022 Fourier ptychographic microscopy (FPM) has risen as a promising computational imaging technique that breaks the trade-off between high resolution and large field of view (FOV). Its reconstruction is normally formulated as a blind phase retrieval problem,
Aiye Wang +5 more
doaj +1 more source
Fourier-Spectral Method for the Phase-Field Equations
Mathematics, 2020 In this paper, we review the Fourier-spectral method for some phase-field models: Allen–Cahn (AC), Cahn–Hilliard (CH), Swift–Hohenberg (SH), phase-field crystal (PFC), and molecular beam epitaxy (MBE) growth.
Sungha Yoon +6 more
doaj +1 more source