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Fission neutron multiplicity distributions are known to be well reproduced by simple Gaussian distributions. Many previous evaluations of multiplicity distributions have adjusted the widths of Gaussian distributions to best fit the measured…

核理论 · 物理学 2014-09-19 J. P. Lestone

This paper presents an approch for modeling with one single kinetic mechanism the chemistry of the autoignition and combustion processes inside an internal combustion engine, as well as the chemical kinetics governing the post-oxidation of…

化学物理 · 物理学 2009-03-24 Jörg Anderlohr , Roda Bounaceur , A. Pires Da Cruz , Frédérique Battin-Leclerc

A high-pressure hydrogen micromix combustor has been investigated using direct numerical simulation with detailed chemistry to examine the flame structure and stabilisation mechanism. The configuration of the combustor was based on the…

We introduce an information-theoretic quantity with similar properties to mutual information that can be estimated from data without making explicit assumptions on the underlying distribution. This quantity is based on a recently proposed…

We have previously found a temperature-dependent upflow in the dimming region following a coronal mass ejection (CME) observed by the {\it Hinode} EUV Imaging Spectrometer (EIS). In this paper, we reanalyzed the observations along with…

太阳与恒星天体物理 · 物理学 2015-05-30 S. Imada , H. Hara , T. Watanabe , I. Murakami , L. K. Harra , T. Shimizu , E. G. Zweibel

In this work, a many-body potential of Nb for radiation damage simulation was developed based on EAM, and most of the point defects of Nb can be predicted properly by this potential. By using the constructed potential, the…

材料科学 · 物理学 2017-02-24 De-Ye Lin , Haifeng Song , Xi Dong Hui

In this chapter we provide a thorough overview of the use of energy-based models (EBMs) in the context of inverse imaging problems. EBMs are probability distributions modeled via Gibbs densities $p(x) \propto \exp{-E(x)}$ with an…

图像与视频处理 · 电气工程与系统科学 2025-09-17 Andreas Habring , Martin Holler , Thomas Pock , Martin Zach

Mutual information (MI) is a fundamental quantity in information theory and machine learning. However, direct estimation of MI is intractable, even if the true joint probability density for the variables of interest is known, as it involves…

机器学习 · 计算机科学 2024-04-29 Rob Brekelmans , Sicong Huang , Marzyeh Ghassemi , Greg Ver Steeg , Roger Grosse , Alireza Makhzani

We investigate the behavior of energy fluctuations in several models of granular gases maintained in a non-equilibrium steady state. In the case of a gas heated from a boundary, the inhomogeneities of the system play a predominant role.…

统计力学 · 物理学 2007-05-23 P. Visco , A. Puglisi , A. Barrat , F. van Wijland , E. Trizac

Smearing techniques are widely used in first-principles calculations of metallic and magnetic materials, where they improve the accuracy of Brillouin zone sampling and lessen the impact of level-crossing instabilities. Smearing introduces a…

材料科学 · 物理学 2023-08-15 Flaviano José dos Santos , Nicola Marzari

Single-spin quantum sensors, for example based on nitrogen-vacancy centres in diamond, provide nanoscale mapping of magnetic fields. In applications where the magnetic field may be changing rapidly, total sensing time is crucial and must be…

量子物理 · 物理学 2021-05-26 K. Craigie , E. M. Gauger , Y. Altmann , C. Bonato

The relationship between nuclear temperature and excitation energy of hot nuclei formed by 8 GeV/c negative pion and antiproton beams incident on 197Au has been investigated with the ISiS 4-pidetector array at the BNL AGS accelerator. The…

Recent progress in quantum computing is paving the way for the realization of early fault-tolerant quantum computers. To maximize the utility of these devices, it is important to develop quantum algorithms that match their capabilities and…

量子物理 · 物理学 2023-10-02 Gumaro Rendon , Peter D. Johnson

Current Lagrangian (particle-tracking) algorithms used to simulate diffusion-reaction equations must employ a certain number of particles to properly emulate the system dynamics---particularly for imperfectly-mixed systems. The number of…

数值分析 · 数学 2017-03-08 Michael Schmidt , Stephen Pankavich , David Benson

In this paper, we present a systematic framework to derive a Lagrangian scheme for porous medium type generalized diffusion equations by employing a discrete energetic variational approach. Such discrete energetic variational approaches are…

数值分析 · 数学 2020-07-15 Chun Liu , Yiwei Wang

Finding the mode of a high dimensional probability distribution $D$ is a fundamental algorithmic problem in statistics and data analysis. There has been particular interest in efficient methods for solving the problem when $D$ is…

机器学习 · 计算机科学 2023-06-05 Xinyu Luo , Christopher Musco , Cas Widdershoven

The neutron yields observed in inertial confinement fusion experiments for higher convergence ratios are about two orders of magnitude smaller than the neutron yields predicted by one-dimensional models, the discrepancy being attributed to…

核实验 · 物理学 2007-05-23 Silviu Olariu

Self-heating condition and following ignition in an Inertial Confinement Fusion (ICF) fuel pellet is evaluated by calculating the power equations, dynamically. In fact, the self-heating condition is a criterion that determines the minimum…

等离子体物理 · 物理学 2018-10-16 T. Koohrokhi , R. Azadifar

We explore Davidson methods for obtaining excitation energies and other linear response properties within quantum self-consistent linear response (q-sc-LR) theory. Davidson-type methods allow for obtaining only a few selected excitation…

A simple analytical model is used to calculate the X-ray heating of the IGM for a range of black hole masses. This process is efficient enough to decouple the spin temperature of the intergalactic medium from the cosmic microwave background…

天体物理学 · 物理学 2008-11-26 Saleem Zaroubi , Rajat M. Thomas , Naoshi Sugiyama , Joe Silk
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