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We propose a Fourier-based learning algorithm for highly nonlinear multiclass classification. The algorithm is based on a smoothing technique to calculate the probability distribution of all classes. To obtain the probability distribution,…

机器学习 · 计算机科学 2022-11-17 Soheil Mehrabkhani

We characterize theoretically and experimentally the degradation of polarization entanglement in a fiber-optic entanglement distribution system where one of the optical fibers is exposed to the effects of polarization mode dispersion (PMD).…

量子物理 · 物理学 2011-01-17 Misha Brodsky , Elizabeth C. George , Cristian Antonelli , Mark Shtaif

We introduce a new family of Generalised Parton Distribution models able to fulfil by construction all the theoretical properties imposed by QCD. These models are built on standard Parton Distribution Functions and extended to off-forward…

We present here a new method based on the Radon transform to model Generalised Parton Distributions (GPDs). It allows to fulfil all theoretical constraints applying on GPDs, especially polynomiality and positivity at the same time. More…

高能物理 - 唯象学 · 物理学 2019-12-20 Cédric Mezrag , Nabil Chouika , Hervé Moutarde , Jose Rodriguez-Quintero

Fourier series multiscale method, a concise and efficient analytical approach for multiscale computation, will be developed out of this series of papers. In the third paper, the analytical analysis of multiscale phenomena inherent in the…

数值分析 · 数学 2022-08-11 Weiming Sun , Zimao Zhang

We propose an empirical method for identifying low damped modes and corresponding mode shapes using frequency measurements from a Wide Area Monitoring System. The method consists of two main steps: Firstly, Complex Principal Component…

信号处理 · 电气工程与系统科学 2021-02-02 Hallvar Haugdal , Kjetil Uhlen

We introduce a versatile numerical method for modeling light diffraction in periodically patterned photonic structures containing quadratically nonlinear non-centrosymmetric optical materials. Our approach extends the generalized source…

光学 · 物理学 2015-06-23 Martin Weismann , Dominic F. G. Gallagher , Nicolae C. Panoiu

Paraxial diffraction modeling based on the Fourier transform has seen widespread implementation for simulating the response of a diffraction-limited optical system. For systems where the paraxial assumption is not sufficient, a class of…

Fourier ptychographic microscopy (FPM) can achieve quantitative phase imaging with a large space-bandwidth product by synthesizing a set of low-resolution intensity images captured under angularly varying illuminations. Determining accurate…

光学 · 物理学 2022-06-14 Chuanjian Zheng , Shaohui Zhang , Delong Yang , Guocheng Zhou , Yao Hu , Qun Hao

In the study of open quantum systems, the polaron transformation has recently attracted a renewed interest as it offers the possibility to explore the strong system-bath coupling regime. Despite this interest, a clear and unambiguous…

量子物理 · 物理学 2016-05-04 Chee Kong Lee , Jeremy Moix , Jianshu Cao

We consider the Fast Fourier Transform (FFT) based numerical method for thin film magnetization problems [Vestg{\aa}rden and Johansen, SuST, 25 (2012) 104001], compare it with the finite element methods, and evaluate its accuracy. Proposed…

计算物理 · 物理学 2018-05-09 Leonid Prigozhin , Vladimir Sokolovsky

The relations between solutions of the three types of totally linear partial differential equations of first order are presented. The approach is based on factorization of a non-homogeneous first order differential operator to products…

泛函分析 · 数学 2007-05-23 C. Viazminsky

A novel 3-D higher-order finite-difference time-domain framework with complex frequency-shifted perfectly matched layer for the modeling of wave propagation in cold plasma is presented. Second- and fourth-order spatial approximations are…

等离子体物理 · 物理学 2013-10-25 Konstantinos P. Prokopidis

A 3D tomographic reconstruction technique is described for inversion of a set of limited-angle high-resolution 2D visible light emission projections (extended in the vertical and toroidal directions) of global MHD eigenmodes in the H-1NF…

等离子体物理 · 物理学 2014-08-29 S. R. Haskey , B. D. Blackwell , B. Seiwald , J. Howard

In this work, we investigate a model order reduction scheme for polynomial parametric systems. We begin with defining the generalized multivariate transfer functions for the system. Based on this, we aim at constructing a reduced-order…

数值分析 · 数学 2019-04-29 Peter Benner , Pawan Goyal

A new domain decomposition method is introduced for the heterogeneous 2-D and 3-D Helmholtz equations. Transmission conditions based on the perfectly matched layer (PML) are derived that avoid artificial reflections and match incoming and…

数值分析 · 数学 2013-06-24 Christiaan C. Stolk

This paper presents a novel non-linear model reduction method: Probabilistic Manifold Decomposition (PMD), which provides a powerful framework for constructing non-intrusive reduced-order models (ROMs) by embedding a high-dimensional system…

数值分析 · 数学 2026-01-09 Jiaming Guo , Dunhui Xiao

In this study, we introduce and explore a delay differential equation that lends itself to explicit solutions in the Fourier-transformed space. Through the careful alignment of the initial function, we can construct a highly accurate…

适应与自组织系统 · 物理学 2024-12-13 Kenta Ohira , Toru Ohira

The Fourier analysis of the final particle distribution followed by cumulant study of the Fourier coefficient event-by-event fluctuation is one of the main approaches for testing the collective evolution in the heavy-ion collision. Using a…

核理论 · 物理学 2021-07-15 Seyed Farid Taghavi

A hybrid model is presented for hyperon polarization that is based on perturbative QCD subprocesses and the recombination of polarized quarks with scalar diquarks. The updated hybrid model is applied to $p+p\to \Lambda +X$ and successfully…

高能物理 - 唯象学 · 物理学 2007-05-23 Gary R. Goldstein