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相关概念视频

Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

2.5K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
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Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

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Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
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Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

1.5K
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
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Energy Stored In A Coaxial Cable01:31

Energy Stored In A Coaxial Cable

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A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
1.5K

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A Real-Time Wearable Electromyography Measurement System for Small Animals
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一个动态稳定的基于机电合的自愈电线.

Shuo Wang1, Zhaofeng Ouyang1, Shitao Geng1

  • 1Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, and Key Laboratory of Green and High-End Utilization of Salt Lake Resources (Chinese Academy of Sciences), Shanghai Jiao Tong University, Shanghai 200240, China.

National science review
|February 12, 2024
PubMed
概括
此摘要是机器生成的。

新的自我修复电线在动态条件下保持稳定的电导率,克服了可穿戴电子设备的局限性. 这一突破提高了设备的精度,用于健康监测等应用,即使有震动.

关键词:
纤维纤维设备的设备.界面化学 界面化学机械电气合器聚合物材料是一种聚合物材料.自愈的电线可以自愈.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 可穿戴电子产品的电子产品
  • 生物医学工程 生物医学工程

背景情况:

  • 可穿戴电子产品需要自愈电线,可以在损坏后恢复机械和电气性能.
  • 现有的自愈电线在动态条件下 (曲,拉伸,震动) 呈现波动的电阻,损害了设备的精度并阻碍了应用.
  • 在自然界中,肌性轴突表现出机械电合,为改善稳定性提供了一个潜在的模型.

研究的目的:

  • 在动态条件下开发一种具有高强度和稳定的电导率的新型自愈电线家族.
  • 为了解决目前可穿戴技术的自愈电线中波动电阻的局限性.
  • 为了使可穿戴设备具有精确的监控能力,即使存在物理干扰.

主要方法:

  • 灵感来自于在自然髓化轴突中观察到的机械-电气合.
  • 在结构部件和导电部件之间采用机电合策略的自愈电线.
  • 在各种动态条件下测试电稳定性,包括模拟四肢震动.

主要成果:

  • 开发了具有高强度和在动态场景下显著改善的电稳定性的自愈电线.
  • 证明了电线对人类健康状况和日常活动的精确监测的能力.
  • 成功实现了可靠的监测,即使与模拟四肢震,模仿条件,如帕金森病.

结论:

  • 这种新的机械-电气合策略在动态条件下有效地提高了自愈电线的电稳定性.
  • 这种方法克服了自我修复电线在可穿戴电子设备中的现实应用的关键障碍.
  • 开发的线路为更强大,更可靠的动态稳定电极和用于先进可穿戴应用的设备铺平了道路.