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相关概念视频

Simplified Synchronous Machine Model01:30

Simplified Synchronous Machine Model

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The Synchronous Machine Model is a fundamental tool in analyzing and ensuring the transient stability of power systems. This model simplifies the representation of a synchronous machine under balanced three-phase positive-sequence conditions, assuming constant excitation and ignoring losses and saturation. The model is pivotal for understanding the behavior of synchronous generators connected to a power grid, particularly during transient events.
In this model, each generator is connected to a...
798
Second Order systems II01:18

Second Order systems II

414
In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
414
First Order Systems01:21

First Order Systems

435
First-order systems, such as RC circuits, are foundational in understanding dynamic systems due to their straightforward input-output relationship. Analyzing their responses to different input functions under zero initial conditions reveals significant insights into system behavior.
When a first-order system is subjected to a unit-step input, its response is characterized by its transfer function. By applying the Laplace transform of the unit-step input to the transfer function, expanding the...
435
Second Order systems I01:20

Second Order systems I

619
A servo system exemplifies a second-order system, featuring a proportional controller and load elements that ensure the output position aligns with the input position. The relationship between these components is described by a second-order differential equation. Applying the Laplace transform under zero initial conditions yields the transfer function, showing how inputs are converted to outputs in the system.
By reinterpreting the system, one can derive the closed-loop transfer function, which...
619
Three-Phase Short Circuit—Unloaded Synchronous Machine01:21

Three-Phase Short Circuit—Unloaded Synchronous Machine

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Conducting a three-phase short circuit test on an unloaded synchronous machine helps understand its impact on the system. The AC fault current's oscillogram, with the DC offset removed, reveals that the waveform amplitude decreases from an initially high value to a steady-state level for one phase of the machine.
This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...
719
¹H NMR of Labile Protons: Temporal Resolution01:10

¹H NMR of Labile Protons: Temporal Resolution

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Protons bonded to heteroatoms such as nitrogen and oxygen exhibit a range of chemical shift values. This is due to the varying degree of hydrogen bonding between the proton and the heteroatom in other molecules. The extent of hydrogen bonding affects the electron density around the proton, thereby giving different chemical shift values for the protons in the proton NMR spectrum.
The –OH proton in alcohols typically appears in the range of δ 2 to 5 ppm but can vary depending on the specific...
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相关实验视频

Updated: Feb 14, 2026

Temporal Tracking of Cell Cycle Progression Using Flow Cytometry without the Need for Synchronization
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RocSync:对异质相机系统进行毫秒精确的时间同步.

Jaro Meyer1, Frédéric Giraud2, Joschua Wüthrich1

  • 1Department of Computer Science, ETH Zurich, 8092 Zurich, Switzerland.

Sensors (Basel, Switzerland)
|February 13, 2026
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种低成本的LED时钟,用于同步各种相机系统,实现毫秒级的时间对齐,用于3D重建等应用. 该方法在无限制环境中通过可见 (RGB) 和红外 (IR) 传感器工作.

关键词:
计算机视觉 计算机视觉不同质的摄像机系统.红外和RGB成像的成像.多视图3D重建的3D重建多视图姿势估计估计时间对齐子框架时间对齐视频同步 视频同步

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相关实验视频

Last Updated: Feb 14, 2026

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Temporal Tracking of Cell Cycle Progression Using Flow Cytometry without the Need for Synchronization

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科学领域:

  • 计算机视觉 计算机视觉
  • 传感器融合式传感器
  • 信号处理 信号处理

背景情况:

  • 多视图视频的精确时空对齐对于动态场景分析至关重要,包括3D重建和姿势估计.
  • 同步异质相机系统 (例如,专业/消费者,RGB/IR) 是具有挑战性的,因为无法提供硬件同步,特别是在现实世界的场景.

研究的目的:

  • 开发一种低成本的通用方法,在各种相机系统中实现毫秒级的时间对齐.
  • 在不受限制的环境中支持可见 (RGB) 和红外 (IR) 模式的同步.

主要方法:

  • 一个定制的LED时钟被设计用于使用红色和红外线LED编码时间.
  • LED 时钟的时间编码允许从记录的中视觉解码曝光窗口的开始和结束时间.
  • 该方法与硬件同步和其他同步技术 (光,音频,时代码) 相比进行了基准测试.

主要成果:

  • 与硬件同步相比,在多个记录中实现了毫秒级的时间对齐,其余误差为1.34 ms RMSE.
  • 在实验评估中表现优于基于光,音频和时间码的同步方法.
  • 在下游计算机视觉任务中直接改善,例如多视图姿势估计和3D重建.

结论:

  • 拟议的LED时钟系统为在不受约束的环境中进行相机同步提供了简化和精简的解决方案.
  • 这种方法提高了用于工业和临床应用的基于视觉的先进传感的可访问性,包括大规模的外科记录.
  • 该系统有效地同步了超过25个异质相机,跨越IR和RGB模式.