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In plasma edge simulations, the behavior of neutral particles is often described by a Boltzmann--BGK equation. Solving this kinetic equation and estimating the moments of its solution are essential tasks, typically carried out using Monte…

数值分析 · 数学 2025-12-30 Zhirui Tang , Julian Koellermeier , Emil Løvbak , Giovanni Samaey

Dissipative collective effects are ubiquitous in quantum physics, and their relevance ranges from the study of entanglement in biological systems to noise mitigation in quantum computers. Here, we put forward the first fully quantum…

The edge plasma turbulence and transport dynamics, as well as the divertor power loads during the thermal quench phase of tokamak disruptions are numerically investigated with BOUT++'s flux-driven, six-field electromagnetic turbulence…

等离子体物理 · 物理学 2023-07-26 Ben Zhu , Xue-qiao Xu , Xian-Zhu Tang

Charged particle transport is an important energy transport mode in the combustion process of inertial confinement fusion plasma. On the one hand, charged particles inside the hot spot have a strong non-equilibrium effect, so it is…

等离子体物理 · 物理学 2023-09-26 Chang Liu , Bao Du , Peng Song

Among the algorithms that are likely to play a major role in future exascale computing, the fast multipole method (FMM) appears as a rising star. Our previous recent work showed scaling of an FMM on GPU clusters, with problem sizes in the…

数值分析 · 计算机科学 2012-10-30 Rio Yokota , Lorena Barba

Many important tasks in chemistry revolve around molecules during reactions. This requires predictions far from the equilibrium, while most recent work in machine learning for molecules has been focused on equilibrium or near-equilibrium…

机器学习 · 计算机科学 2022-04-06 Johannes Gasteiger , Shankari Giri , Johannes T. Margraf , Stephan Günnemann

This paper presents a scheme for efficient channel usage between simulator and accelerator where the accelerator models some RTL sub-blocks in the accelerator-based hardware/software co-simulation while the simulator runs transaction-level…

性能 · 计算机科学 2011-11-09 Jae-Gon Lee , Moo-Kyoung Chung , Ki-Yong Ahn , Sang-Heon Lee , Chong-Min Kyung

Modelling the sudden depressurisation of superheated liquids through nozzles is a challenge because the pressure drop causes rapid flash boiling of the liquid. The resulting jet usually demonstrates a wide range of structures, including…

流体动力学 · 物理学 2021-12-15 David Schmidt , Romit Maulik , Konstantinos G. Lyras

Real-world applications are now processing big-data sets, often bottlenecked by the data movement between the compute units and the main memory. Near-memory computing (NMC), a modern data-centric computational paradigm, can alleviate these…

硬件体系结构 · 计算机科学 2021-06-30 Stefano Corda , Madhurya Kumaraswamy , Ahsan Javed Awan , Roel Jordans , Akash Kumar , Henk Corporaal

Fast multipole methods have O(N) complexity, are compute bound, and require very little synchronization, which makes them a favorable algorithm on next-generation supercomputers. Their most common application is to accelerate N-body…

数值分析 · 计算机科学 2012-03-06 Hatem Ltaief , Rio Yokota

The present paper deals with the problem of improving the efficiency of large scale turbulent flow simulations. The high-fidelity methods for modelling turbulent flows become available for a wider range of applications thanks to the…

计算物理 · 物理学 2018-04-10 Boris Krasnopolsky

We present a number of novel algorithms, based on mathematical optimization formulations, in order to solve a homogeneous multiprocessor scheduling problem, while minimizing the total energy consumption. In particular, for a system with a…

操作系统 · 计算机科学 2015-11-13 Mason Thammawichai , Eric C. Kerrigan

Scientific applications are often complex, irregular, and computationally-intensive. To accommodate the ever-increasing computational demands of scientific applications, high-performance computing (HPC) systems have become larger and more…

分布式、并行与集群计算 · 计算机科学 2019-11-20 Ali Mohammed , Aurelien Cavelan , Florina M. Ciorba , Ruben M. Cabezon , Ioana Banicesu

A fundamental challenge in large-scale networked systems viz., data centers and cloud networks is to distribute tasks to a pool of servers, using minimal instantaneous state information, while providing excellent delay performance. In this…

概率论 · 数学 2018-09-07 Debankur Mukherjee

Mobile edge computing (MEC) has been regarded as a promising approach to deal with explosive computation requirements by enabling cloud computing capabilities at the edge of networks. Existing models of MEC impose some strong assumptions on…

网络与互联网体系结构 · 计算机科学 2023-10-10 Tao Deng , Zhanwei Yu , Di Yuan

Modern supercomputers are increasingly requiring the presence of accelerators and co-processors. However, it has not been easy to achieve good performance on such heterogeneous clusters. The key challenge has been to ensure good load…

分布式、并行与集群计算 · 计算机科学 2013-07-18 Jesse Kelly , Omar Ghattas , Hari Sundar

Present-day quantum systems face critical bottlenecks, including limited qubit counts, brief coherence intervals, and high susceptibility to errors-all of which obstruct the execution of large and complex circuits. The advancement of…

分布式、并行与集群计算 · 计算机科学 2025-06-13 Waylon Luo , Jiapeng Zhao , Tong Zhan , Qiang Guan

Carefully balancing load in distributed stream processing systems has a fundamental impact on execution latency and throughput. Load balancing is challenging because real-world workloads are skewed: some tuples in the stream are associated…

分布式、并行与集群计算 · 计算机科学 2016-01-28 Muhammad Anis Uddin Nasir , Gianmarco De Francisci Morales , Nicolas Kourtellis , Marco Serafini

Multi-access Edge Computing (MEC) is a type of network architecture that provides cloud computing capabilities at the edge of the network. We consider the use case of video surveillance for an university campus running on a 5G-MEC…

分布式、并行与集群计算 · 计算机科学 2024-10-28 Ricardo N. Boing , Hugo Vaz Sampaio , Fernando Koch , Rene N. S. Cruz , Carlos B. Westphall

Modern Mixed-Criticality Systems (MCSs) rely on hardware heterogeneity to satisfy ever-increasing computational demands. However, most of the heterogeneous co-processors are designed to achieve high throughput, with their…

硬件体系结构 · 计算机科学 2024-09-24 Jiapeng Guan , Ran Wei , Dean You , Yingquan Wang , Ruizhe Yang , Hui Wang , Zhe Jiang