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相关概念视频

Traveling Waves: Lossless Lines01:27

Traveling Waves: Lossless Lines

134
The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx  and a shunt capacitance CΔx.
134

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相关实验视频

Updated: Jun 22, 2025

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
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通过单向波场取值进行图形腐蚀映射的高效引导波模型设计.

Emiel Hassefras1, Arno Volker1, Martin Verweij2

  • 1Acoustic Sensor and Sonar Systems, Department of Acoustic & Underwater Warfare, Netherlands Organisation for Applied Scientific Research (TNO), 2597 AK Den Haag, The Netherlands.

Sensors (Basel, Switzerland)
|June 27, 2024
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概括

一个新的递归取值方案显著加快了管道检查的引导波断层扫描. 这种方法准确地模拟波传播,使得更快,更精确的腐蚀深度绘制.

关键词:
声学配方的形成方式腐蚀监测 腐蚀监测 腐蚀监测外加推断的运营商进行外加推断.断层扫描 (tomography) 是一个非常重要的技术.

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Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy
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科学领域:

  • 材料科学 材料科学 材料科学
  • 非破坏性测试是指非破坏性测试.
  • 波浪物理 波浪物理

背景情况:

  • 管道检查中的准确缺陷大小依赖于引导波断层扫描中的精确前向模型.
  • 当前的方法在模拟复杂的波现象时面临着速度和准确性的挑战.

研究的目的:

  • 评估用于引导波断层扫描和全波形反转的递归取值方案.
  • 为了提高模拟波传播在广泛的管道段的速度和准确性.

主要方法:

  • 一种基于表的方法,使用跨波数的预计算外推算子.
  • 解决多个波形 (A0,S0,SH1) 和螺旋路径的3D弹力动力波方程.
  • 数字验证和与实验单模波场数据进行比较.

主要成果:

  • 递归抽取方案实现了与光线跟踪可比的建模速度.
  • 精确处理复杂的速度模型和整个频段的衍射现象.
  • 数字研究和实验比较显示,波场预测的良好一致性.

结论:

  • 递归抽取方案是有效的引导波断层扫描和完整的波形反转.
  • 这种方法在快速准确的管道缺陷表征方面取得了重大进展.
  • 该方法显示了结构性健康监测中的实际应用潜力.