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We model chaotic diffusion, in a symplectic 4D map by using the result of a theorem that was developed for stochastically perturbed integrable Hamiltonian systems. We explicitly consider a map defined by a free rotator (FR) coupled to a…

混沌动力学 · 物理学 2015-06-17 Martín F. Mestre , Armando Bazzani , Pablo M. Cincotta , Claudia M. Giordano

Gaussian random fields have been one of the most popular tools for analyzing spatial data. However, many geophysical and environmental processes often display non-Gaussian characteristics. In this paper, we propose a new class of spatial…

应用统计 · 统计学 2017-10-03 Minjie Fan , Debashis Paul , Thomas C. M. Lee , Tomoko Matsuo

Conventional meta-atom designs rely heavily on researchers' prior knowledge and trial-and-error searches using full-wave simulations, resulting in time-consuming and inefficient processes. Inverse design methods based on optimization…

机器学习 · 计算机科学 2023-12-11 Zezhou Zhang , Chuanchuan Yang , Yifeng Qin , Hao Feng , Jiqiang Feng , Hongbin Li

In this paper we investigate, with a detailed Monte-Carlo simulation based on Geant4, the novel approach [Nucl. Instrum. Methods A588 (2008) 457] to 3D imaging with photon scattering. A monochromatic and well collimated gamma beam is used…

医学物理 · 物理学 2011-09-23 M. Lenti , M. Veltri

We develop a fast method for optimally designing experiments in the context of statistical seismic source inversion. In particular, we efficiently compute the optimal number and locations of the receivers or seismographs. The seismic source…

统计计算 · 统计学 2023-07-19 Quan Long , Mohammad Motamed , Raul Tempone

The mixture of Gaussian distributions, a soft version of k-means , is considered a state-of-the-art clustering algorithm. It is widely used in computer vision for selecting classes, e.g., color, texture, and shapes. In this algorithm, each…

机器学习 · 统计学 2016-12-30 Mahajabin Rahman , Davi Geiger

Simulated maps of the microwave background (CMB) radiation are generally created using one of two methods: all-sky simulations use the spherical harmonic transform, while maps covering small areas approximate the sky as flat, allowing the…

宇宙学与河外天体物理 · 物理学 2025-07-22 Mariona Giner Mascarell , Emory F. Bunn

Extensive air showers produce high-energy muons that can be utilized to probe hadronic interaction models in cosmic ray interactions. Most muons originate from pion and kaon decays, called $\textit{conventional}$ muons, while a smaller…

We propose a hybrid quantum-classical approach to model continuous classical probability distributions using a variational quantum circuit. The architecture of the variational circuit consists of two parts: a quantum circuit employed to…

量子物理 · 物理学 2019-01-04 Jonathan Romero , Alan Aspuru-Guzik

We present a new version of the fast Gauss transform (FGT) for discrete and continuous sources. Classical Hermite expansions are avoided entirely, making use only of the plane-wave representation of the Gaussian kernel and a new…

数值分析 · 数学 2023-05-15 Leslie Greengard , Shidong Jiang , Manas Rachh , Jun Wang

A coasting hadron beam with an elliptical transverse profile, uniform charge density, and small transverse four-dimensional (4D) emittance could improve accelerator performance in several contexts. A phase space painting method to generate…

加速器物理 · 物理学 2022-09-14 A. Hoover , N. E. Evans

When measuring diameters of partially resolved sources like planetary nebulae, H II regions or galaxies, often a technique called gaussian deconvolution is used. This technique yields a gaussian diameter which subsequently has to be…

天体物理学 · 物理学 2007-05-23 P. A. M. van Hoof

Generating synthetic images is a useful method for cheaply obtaining labeled data for training computer vision models. However, obtaining accurate 3D models of relevant objects is necessary, and the resulting images often have a gap in…

计算机视觉与模式识别 · 计算机科学 2025-04-14 Bram Vanherle , Brent Zoomers , Jeroen Put , Frank Van Reeth , Nick Michiels

An increased data sample of identified secondary muons is collected at detection level. Project GRAND identifies secondary cosmic ray muons from electrons utilizing a thin steel absorber and tracking (PWC) chambers. The resulting angular…

天体物理学 · 物理学 2007-05-23 A. Roesch , J. Carpenter , S. Desch , J. Gress , T. F. Lin , J. Poirier

Including massive neutrinos in $N$-body simulations is a challenging task due to the large thermal velocities of the neutrinos. In particle based codes this leads to problems of shot-noise due to insufficient sampling of the neutrino…

宇宙学与河外天体物理 · 物理学 2019-04-10 Jacob Brandbyge , Steen Hannestad , Thomas Tram

Recent progress has shown that the geomagnetic field exerts a more significant impact than expected on the behavior of charged secondary particles in inclined air showers. In this study, we for the first time combine it with atmospheric…

高能天体物理现象 · 物理学 2025-08-27 Si-Zhe Wu , Chao Zhang , Ruo-Yu Liu , Xi-Shui Tian , Zhuo Li

Considering the increasing number of experimental results in the manufacturing process of quantum dots with different geometries, and the fact that most numerical methods that can be used to investigate quantum dots with non-trivial…

材料科学 · 物理学 2022-12-06 G. A. Mantashian , P. A. Mantashyan , D. B. Hayrapetyan

This paper presents a design framework for synthesizing angularly selective spatial filters using non-uniform metagratings. While traditional metagratings focus on channeling energy into higher-order Floquet modes for a fixed incidence…

应用物理 · 物理学 2026-01-29 Jinyong Kim , Minseok Kim

Directional emission of photons with designed polarizations and orbital angular momenta is crucial for exploiting full potential of quantum emitters (QEs) within quantum information technologies. Capitalizing on the concept of hybrid…

光学 · 物理学 2021-12-21 Yinhui Kan , Sergey I. Bozhevolnyi

Score-based generative modelling (SGM) has proven to be a very effective method for modelling densities on finite-dimensional spaces. In this work we propose to extend this methodology to learn generative models over functional spaces. To…