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相关概念视频

Cable Subjected to a Distributed Load01:24

Cable Subjected to a Distributed Load

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The analysis of suspension bridges is a complex and critical process that involves multiple factors, including the shape and tension of the main cables. The main cables of suspension bridges are subjected to distributed loads, which result in changes in tensile forces and deformation of the cable. These loads must be carefully considered to ensure that the bridge is safe and capable of supporting the weight of different loads.
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Load-frequency control01:28

Load-frequency control

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Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
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Energy Stored In A Coaxial Cable01:31

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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.
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Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
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Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
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相关实验视频

Updated: Mar 4, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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通过光纤环网的多次访问稳定频率传播.

Chenxia Liu1, Hanyue Wang1, Hanqing Li1

  • 1North China Electric Power University, Baoding 071003, Hebei, China.

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概括
此摘要是机器生成的。

一个新的分层方案确保了光纤网络中稳定的频率传播. 该系统使用初级和二级节点进行可靠,高稳定的信号生成和分发.

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科学领域:

  • 光学通信是指光学通信.
  • 网络工程 网络工程
  • 计量学 计量学 计量学

背景情况:

  • 稳定的频率传播对于现代通信网络至关重要.
  • 光纤环网面临着噪声和单点故障的挑战.
  • 现有的方法可能无法有效地满足用户的各种需求,而且资源有限.

研究的目的:

  • 为光纤环网提供稳定的频率传播提出一个分层的多访问方案.
  • 为了提高网络的稳定性,防止单节点故障.
  • 为了实现高效的资源利用,以满足不同的用户需求.

主要方法:

  • 实现一个具有初级和二级节点的等级结构.
  • 在主节点使用相锁循环来抑制纤维引起的噪音.
  • 在二级节点采用第三级混合,以产生稳定的频率输出.

主要成果:

  • 在主要地点显示的频率不稳定性为2.65 × 10−14 @ 1s和4.58 × 10−17 @ 10,000s.
  • 在中间节点实现了1.48 × 10−14 @ 1s和4.02 × 10−16 @ 10,000s的频率不稳定性.
  • 在另一个中间节点记录了1.56 × 10−14 @ 1s和9.70 × 10−16 @ 10,000s的频率不稳定性.
  • 在220公里的光纤环网上验证了该计划.

结论:

  • 拟议的分层多访问方案提供了稳定的频率传播.
  • 该系统确保光纤环网的连续运行和故障耐受性.
  • 这种方法为大都市网络中稳定的频率分配提供了坚实的基础.