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相关概念视频

Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

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Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
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Muscle Stimulation Frequency01:22

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
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Actin filaments undergo polymerization and depolymerization from either end. The polymerization and depolymerization rates depend on the cytosolic concentration of free G-actins. The polymerization rate is generally higher at the plus or barbed end, while the depolymerization rate is higher at the minus or pointed end. At a steady state, critical concentration describes the concentration of free G-actin monomers at which the polymerization rate at the plus end is equal to that of the...
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相关实验视频

Updated: Jul 18, 2025

An Orbital Shaking Culture of Mammalian Cells in O-shaped Vessels to Produce Uniform Aggregates
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大规模的齐格扎克图案从循环活动摇器中出现.

Gaspard Junot1, Marco De Corato2, Pietro Tierno1,3,4

  • 1Departament de Física de la Matèria Condensada, Universitat de Barcelona, 08028 Barcelona, Spain.

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|August 25, 2023
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概括
此摘要是机器生成的。

活跃的磁转子,作为流体动的,自发地形成大曲带. 这种自我组织成具有拓缺陷的动态结构表明了来自简单流场的新兴模式.

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科学领域:

  • 软物质物理学 软物质物理学
  • 活性物质系统的活性物质系统
  • 流体动力学 流体动力学

背景情况:

  • 活性物质系统表现出复杂的新兴行为.
  • 战斗机是生成流体流动的模型活性粒子.
  • 了解驱动系统中的自我组织至关重要.

研究的目的:

  • 为了研究磁转子作为活动摇器的集体行为.
  • 分析动态结构的形成和拓缺陷.
  • 为了确定生成的流场在模式形成中的作用.

主要方法:

  • 对可逆操作的磁转子进行实验分析.
  • 在粘弹性介质中基于粒子的活性动器模拟.
  • 空间时空模式和流域的表征.

主要成果:

  • 从旋转机群体中出现大型齐格扎格带.
  • 集体组织成具有自相似增长的动态结构.
  • 拓缺陷 (cusps) 的生成,连接着交替性的.
  • 证明震动器产生的流场足以重现观察到的模式.

结论:

  • 活跃震动器产生的流场驱动粒子系统中的自我组织.
  • 降低粒子自由度,如结的定向运动,促进出现的模式.
  • 这项工作揭示了粘弹性介质内驱动粒子系统的自我组织场景.