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相关概念视频

Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

158
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
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Bewley Lattice Diagram01:12

Bewley Lattice Diagram

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The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
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相关实验视频

Updated: Oct 3, 2025

Quasi-light Storage for Optical Data Packets
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与多重光学晶格时钟的差分时钟比较

Xin Zheng1, Jonathan Dolde1, Varun Lochab1

  • 1University of Wisconsin-Madison, Madison, WI, USA.

Nature
|February 17, 2022
PubMed
概括
此摘要是机器生成的。

这项研究引入了多重光学晶格时钟,克服了局部振荡器的局限性,以提高计时效果. 这种新的原子钟设计实现了前所未有的稳定性和精度,

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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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相关实验视频

Last Updated: Oct 3, 2025

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科学领域:

  • 原子,分子和光学物理学
  • 量子计量学
  • 精确测量

背景情况:

  • 光学原子钟已经推进了计时,计量学和量子科学.
  • 时钟的不稳定性往往受到局部振荡器的限制, 而不是原子本身.

研究的目的:

  • 实现一个新的"多维"一维光学晶格时钟.
  • 为了克服光学时钟局部振荡器不稳定的局限性.
  • 在精密测量和基础科学中实现新的应用.

主要方法:

  • 使用一维光学晶格捕获空间分辨率的原子组合.
  • 同时通过共享时钟激光对多个组合进行审讯.
  • 使用并行读取和同步的Ramsey询问组合对.

主要成果:

  • 实现了26秒的原子-原子相干时间,比原子-激光相干提高了270倍.
  • 在3.3小时后显示出[公式:见文本]的相对不稳定性和8.9 × 10-20的统计不确定性.
  • 建立了一个小型的时钟网络,有6个组合和15个对对比,显示下面的相对不稳定性.
  • 准备的四种稳定的同位素的空间分辨,异质组合对.

结论:

  • 多重时钟设计有效地绕过了局部振荡器的不稳定性限制.
  • 这项技术可实现高精度的同位素转移测量和时钟系统的表征.
  • 这为基于时钟的探测器铺平了道路, 探测引力波,