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相关概念视频

Equilibrium Conditions for a Particle01:23

Equilibrium Conditions for a Particle

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When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
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Motion Of A Charged Particle In A Magnetic Field01:22

Motion Of A Charged Particle In A Magnetic Field

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A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
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Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving01:23

Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving

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Consider a wooden box and a cylinder of known masses m1 and m2, respectively,  hanging from a ceiling with the help of a massless pulley system.
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Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

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The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force...
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Maxwell-Boltzmann Distribution: Problem Solving01:20

Maxwell-Boltzmann Distribution: Problem Solving

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Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
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Conservation of Linear Momentum for a System of Particles01:28

Conservation of Linear Momentum for a System of Particles

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In the dynamic realm of billiards, a fascinating interplay of forces governs the motion of cue balls and stationary balls. When the cue ball collides with a stationary ball, linear momentum is exchanged. The cue ball imparts a fraction of its linear momentum to the stationary ball, causing the cue ball to decelerate while initiating the motion of the stationary ball.
The impulsive force at play during this interaction is of extremely short duration, rendering its impulse negligible. When...
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相关实验视频

Updated: Jun 8, 2025

A Protocol for Real-time 3D Single Particle Tracking
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A Protocol for Real-time 3D Single Particle Tracking

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探索HEP的代码可移植性解决方案,使用粒子跟踪测试代码.

Hammad Ather1, Sophie Berkman2, Giuseppe Cerati3

  • 1Department of Computer and Information Science, University of Oregon, Eugene, OR, United States.

Frontiers in big data
|November 7, 2024
PubMed
概括
此摘要是机器生成的。

高能物理 (HEP) 实验必须利用各种计算资源,如GPU. 使用代码可移植性工具实现最佳性能需要仔细实施,因为结果因内存布局和编译器选择等因素而有很大差异.

关键词:
代码可移植性 代码可移植性不同质的架构 不同质的架构不同质的计算方式.微粒追踪器 微粒追踪器可移植性解决方案的可移植性解决方案

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Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
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Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

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Image-based Lagrangian Particle Tracking in Bed-load Experiments
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Image-based Lagrangian Particle Tracking in Bed-load Experiments

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相关实验视频

Last Updated: Jun 8, 2025

A Protocol for Real-time 3D Single Particle Tracking
10:16

A Protocol for Real-time 3D Single Particle Tracking

Published on: January 3, 2018

14.8K
Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

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Image-based Lagrangian Particle Tracking in Bed-load Experiments
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科学领域:

  • 高能物理 高能物理
  • 计算科学 计算科学
  • 软件工程 软件工程 软件工程

背景情况:

  • 传统的高能物理 (HEP) 实验严重依赖于x86 CPU.
  • 即将到来的实验如DUNE和高发光率LHC将大幅增加计算需求.
  • 利用各种各样的计算资源,包括来自不同供应商的图形处理单元 (GPU),对于满足这些需求至关重要.

研究的目的:

  • 评估HP的不同代码可移植性解决方案的性能和实施经验.
  • 使用HEP跟踪算法测试案例,将便携式代码实现与参考x86 CPU版本进行比较.
  • 识别影响多个架构可移植代码执行性能的因素.

主要方法:

  • 来自HEP跟踪算法的测试代码被用于对各种可移植性解决方案进行基准测试.
  • 在不同的可移植性工具中进行了性能比较,包括基于编译器实用方法和抽象库.
  • 分析了诸如内存布局,内存固定策略和编译器选择等因素对性能的影响.

主要成果:

  • 便携式实现在几个实例中表现出接近参考代码的性能.
  • 观察到显著的性能差异,高度依赖于具体的实施细节.
  • 即使对于相对简单的测试应用程序,也很难实现最佳性能.

结论:

  • 代码可移植性工具为HEP计算提供了可行的解决方案,但实现峰值性能需要仔细考虑实施的具体情况.
  • 存储器布局,固定策略和编译器选择是影响便携式代码效率的关键因素.
  • 编译器和可移植性工具的持续开发对于它们在未来的HEP实验中成功部署至关重要.