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相关概念视频

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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自行物体可以逃脱压缩刺激吗?

Masaki Yoshikai1, Muneyuki Matsuo1,2, Nobuhiko J Suematsu3,4

  • 1Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan. nakatas@hiroshima-u.ac.jp.

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概括

与磁性CP不同,含有坎佛 (CPs) 的循环纸证明了从封闭水域逃脱的可能性增加. 来自CP的排斥力改善了自动推进,这表明了紧急疏散系统的潜力.

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科学领域:

  • 物理化学 物理化学
  • 软物质物理学 软物质物理学
  • 自动推进系统 自动推进系统

背景情况:

  • 研究用于紧急疏散系统的自行物体.
  • 了解基于坎佛的物体在水面上的行为.

研究的目的:

  • 为了研究水上浸的圆形纸张 (CPs) 和磁性CPs (MCPs) 的自行运动.
  • 评估它们作为紧急疏散无生命系统的潜力.

主要方法:

  • 两个水室 (Cin和Cout) 通过一个门连接在一起.
  • 监控CP和MCP从Cin到Cout的移动,因为Cin面积 (Ain) 减少了.
  • 分析逃脱概率 (P) 与门宽度 (Wg) 和表面张力差异 (Δγ) 相比.

主要成果:

  • 随着Ain的减少,CP表现出随机运动,并且逃脱概率 (P) 增加.
  • 与CP相比,MCP表现出集群行为,导致P较低.
  • 表面张力 (Δγ) 的差异随着Ain的减少而增加,从而影响P.

结论:

  • CP之间的排斥力增强了对门的自推力,导致更高的逃跑概率.
  • 该研究表明,CP由于其排斥性相互作用,在疏散方面比MCP更有效.
  • 结果为设计应急场景的自行车系统提供了洞察力.