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We present a new methodology for simulating self-gravitating general-relativistic fluids. In our approach the fluid is modelled by means of Lagrangian particles in the framework of a general-relativistic (GR) Smooth Particle Hydrodynamics…

广义相对论与量子宇宙学 · 物理学 2025-06-12 S. Rosswog , P. Diener

Since its inception in 1995, LAMMPS has grown to be a world-class molecular dynamics code, with thousands of users, over one million lines of code, and multi-scale simulation capabilities. We discuss how LAMMPS has adapted to the modern…

分布式、并行与集群计算 · 计算机科学 2025-09-25 Anders Johansson , Evan Weinberg , Christian R. Trott , Megan J. McCarthy , Stan G. Moore

Characterizing the temporal variability of astrophysical sources is key to understanding the underlying physical processes driving their emissions. This work introduces a gammapy_SyLC, a Python package that offers tools to simulate and fit…

高能天体物理现象 · 物理学 2025-03-19 Claudio Galelli

We present a numerical code to simulate maps of Galactic emission in intensity and polarization at microwave frequencies, aiding in the design of Cosmic Microwave Background experiments. This Python code builds on existing efforts to…

宇宙学与河外天体物理 · 物理学 2017-06-21 Ben Thorne , Jo Dunkley , David Alonso , Sigurd Naess

Particle-Mesh (PM) codes are still very useful tools for testing predictions of cosmological models in cases when extra high resolution is not very important. We release for public use a cosmological PM N-body code. We provide a complete…

天体物理学 · 物理学 2007-05-23 Anatoly Klypin , Jon Holtzman

We introduce an open source python framework named PHS - Parallel Hyperparameter Search to enable hyperparameter optimization on numerous compute instances of any arbitrary python function. This is achieved with minimal modifications inside…

机器学习 · 计算机科学 2020-02-28 Peter Michael Habelitz , Janis Keuper

Probabilistic programming (PP) allows flexible specification of Bayesian statistical models in code. PyMC3 is a new, open-source PP framework with an intutive and readable, yet powerful, syntax that is close to the natural syntax…

统计计算 · 统计学 2015-07-30 John Salvatier , Thomas Wiecki , Christopher Fonnesbeck

XMDS2 is a cross-platform, GPL-licensed, open source package for numerically integrating initial value problems that range from a single ordinary differential equation up to systems of coupled stochastic partial differential equations. The…

计算物理 · 物理学 2012-11-22 Graham R. Dennis , Joseph J. Hope , Mattias T. Johnsson

Molecular dynamics (MD) simulation is a powerful computational tool to study the behavior of macromolecular systems. But many simulations of this field are limited in spatial or temporal scale by the available computational resource. In…

计算物理 · 物理学 2010-01-22 Ji Xu , Ying Ren , Wei Ge , Xiang Yu , Xiaozhen Yang , Jinghai Li

We introduce the Balsam service to manage high-throughput task scheduling and execution on supercomputing systems. Balsam allows users to populate a task database with a variety of tasks ranging from simple independent tasks to dynamic…

分布式、并行与集群计算 · 计算机科学 2019-09-20 Michael A. Salim , Thomas D. Uram , J. Taylor Childers , Prasanna Balaprakash , Venkatram Vishwanath , Michael E. Papka

We propose a Fully Polynomial-Time Approximation Scheme (FPTAS) for stochastic dynamic programs with multidimensional action, scalar state, convex costs and linear state transition function. The action spaces are polyhedral and described by…

离散数学 · 计算机科学 2020-06-11 Nir Halman , Giacomo Nannicini

This monograph presents the design, implementation, and evaluation of Pyroclast, a modular high-performance Python framework for large-scale geodynamic simulations. Pyroclast addresses limitations of legacy geodynamics solvers, often…

数学软件 · 计算机科学 2026-03-17 Marcel Ferrari

Existing Python libraries and tools lack the ability to efficiently compute statistical test results for large datasets in the presence of missing values. This presents an issue as soon as constraints on runtime and memory availability…

数学软件 · 计算机科学 2025-05-02 Fabian Woller , Lis Arend , Christian Fuchsberger , Markus List , David B. Blumenthal

Warm dense matter systems created in the laboratory are highly dynamical. In such cases electron dynamics is often needed to accurately simulate the evolution and properties of the system. Large systems force one to make simple…

量子气体 · 物理学 2014-08-13 Paul E. Grabowski

We develop an algorithm suitable for parallel molecular dynamics simulations in $d$ spatial dimensions and describe its implementation in C++. All routines work in arbitrary $d$; the maximum simulated $d$ is limited only by available…

软凝聚态物质 · 物理学 2022-05-18 Robert S. Hoy , Kevin A. Interiano-Alberto

PLUMED is an open-source software package that is widely used for analyzing and enhancing molecular dynamics simulations that works in conjunction with most available molecular dynamics softwares. While the computational cost of PLUMED…

Relativistic plasmas around compact objects can sometimes be approximated as being force-free. In this limit, the plasma inertia is negligible and the overall dynamics is governed by global electric currents. We present a novel numerical…

天体物理仪器与方法 · 物理学 2024-06-14 Yoonsoo Kim , Elias R. Most , William Throwe , Saul A. Teukolsky , Nils Deppe

Field-Programmable Gate Arrays (FPGAs) are widely used in the central signal processing design of the Square Kilometre Array (SKA) as acceleration hardware. The frequency domain acceleration search (FDAS) module is an important part of the…

分布式、并行与集群计算 · 计算机科学 2018-07-02 Haomiao Wang , Prabu Thiagaraj , Oliver Sinnen

In robot control, planning, and learning, there is a need for rigid-body dynamics libraries that are highly performant, easy to use, and compatible with CPUs and accelerators. While existing libraries often excel at either low-latency CPU…

机器人学 · 计算机科学 2026-05-18 Daniel Morton , Marco Pavone

Spectropolarimetry, the observation of polarization and intensity as a function of wavelength, is a powerful tool in stellar astrophysics. It is particularly useful for characterizing stars and circumstellar material, and for tracing the…