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相关概念视频

Streamlines, Streaklines, and Pathlines01:18

Streamlines, Streaklines, and Pathlines

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A streamline represents the trajectory that is always tangent to the fluid's velocity vector at any given point. The velocity of a fluid particle is always directed along the streamline, ensuring the particle continuously follows the streamline's path. Streamlines are particularly useful for visualizing the overall direction of flow in a fluid system, and they provide an instantaneous representation of the flow's velocity field. In steady flow, where conditions do not change over...
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Visual System01:26

Visual System

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Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
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Three-Dimensional Force System

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In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
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Support reactions in three dimensions help maintain the stability and equilibrium of various structures and systems. These reactions prevent the system from translating and rotating, ensuring the design can withstand external forces and perform its intended function efficiently and safely. Some of the supports providing support reactions in three dimensions are discussed below:
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Velocity and Position by Graphical Method

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Velocity and position can be calculated from the known function of acceleration as a function of time. The total area under the acceleration-time graph and the velocity-time graph gives the change in velocity and position, respectively. In the case of an airplane, its acceleration is tracked using the inertial navigation system. The pilot provides the input of the airplane's initial position and velocity before takeoff. The inertial navigation system then uses the acceleration data to...
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The pV diagram, which is a graph of pressure versus volume of the gas under study, is helpful in describing certain aspects of the substance. When the substance behaves like an ideal gas, the ideal gas equation describes the relationship between its pressure and volume. On a pV diagram, it is common to plot an isotherm, which is a curve showing p as a function of V with the number of molecules and the temperature fixed. Then, for an ideal gas, the product of the pressure of the gas and its...
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相关实验视频

Updated: Jun 15, 2025

Author Spotlight: Streamlining Visual Dynamics to Simplify Molecular Dynamics Simulations Using Gromacs
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视觉动力3.0中的新功能

Ivo Henrique Provensi Vieira1, Esdras Abimael Maia Mendonça1, Fernando Loza Guariero1

  • 1Bioinformatics and Medicinal Chemistry Laboratory (LABIOQUIM), Oswaldo Cruz Rondônia Foundation; National Institute of Epidemiology in the Western Amazon - EPIAMO.

Journal of visualized experiments : JoVE
|August 26, 2024
PubMed
概括

视觉动力学 (VD) 是一个简化分子动力学 (MD) 模拟的网络工具,用于没有计算专业知识的用户. 它使得使用蛋白质-连接体复合体的验证,演示和教学成为可能,使复杂的模拟更容易获得.

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科学领域:

  • 计算化学的计算化学
  • 生物物理学的生物物理.
  • 结构生物学 结构生物学

背景情况:

  • 分子动力学 (MD) 模拟提供了宝贵的见解,但需要大量的计算专业知识.
  • 量子方法虽然准确,但对于许多生物实验来说计算上是不可行的.
  • 对MD模拟的可访问性对于验证,演示和教育目的至关重要.

研究的目的:

  • 介绍Visual Dynamics (VD),这是一个旨在简化基于Gromacs的MD模拟的Web工具.
  • 提供一个协议,用于运行使用VD的蛋白质连接体复合物的模拟.
  • 为了使具有有限计算背景的用户能够执行和理解MD模拟.

主要方法:

  • 在视觉动力学 (VD) 网络工具中使用Gromacs进行分子动力学 (MD) 执行.
  • 开发了一种模拟蛋白质-连接体复合物的协议,使用与D5复合的Plasmodium vivax的FK506结合蛋白 (PDB ID: 4mgv) 作为案例研究.
  • 提供了详细的模拟参数和可重复结果的说明,包括使用ACPYPE的准备.

主要成果:

  • 证明了VD的可用性,用于运行蛋白质连接体复合体的短期MD模拟.
  • 成功模拟了FK506结合蛋白-配体复合体,提供了一个可复制的协议.
  • 突出了VD的灵活性,并为其他模拟模型提供了一般指导.

结论:

  • 视觉动力学 (VD) 有效地降低了执行分子动力学 (MD) 模拟的进入障碍.
  • 该工具促进了计算生物物理学概念的验证,演示和教学.
  • 通过使复杂的MD模拟更容易获得,VD赋予研究人员和教育工作者权力.