Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Upsampling01:22

Upsampling

216
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
216
Ultrasonography01:17

Ultrasonography

4.4K
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
4.4K
Aliasing01:18

Aliasing

124
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
124

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Customizing Ionic Micelles by Dynamic Coassembly of Sequence-Defined Peptoid Block Copolymers.

Macromolecules·2026
Same author

Spatio-temporal evolution analysis of land-use carbon effects driven by new quality productive forces: a case study of Hubei province.

Scientific reports·2026
Same author

Programmable Electrostatics in Charge-Patterned Polypeptoid Micelles Probed by Small-Angle Neutron Scattering.

Macromolecules·2026
Same author

CCDC120 phase separation contributes to desmosomal integrity and cardiac function.

Nature communications·2026
Same author

Corona Chain-Controlled Transition from Ostwald Ripening-Grown Hexagonal Platelets to Screw-Dislocation Spirals in Liquid-Crystalline Polypeptoids.

Nano letters·2026
Same author

Ferroptosis-STING co-activation drives GzmB<sup>+</sup>CD38<sup>+</sup>CD8<sup>+</sup> T-cell expansion to overcome lymphoma immunosuppression.

Biomaterials·2026

相关实验视频

Updated: Jun 15, 2025

Blood Flow Imaging with Ultrafast Doppler
05:57

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

7.6K

在超声波成像检查中,用于分布式压力传感的空间频率并行子采样.

Jiachen Xiao1, Li Lin1, Donghui Zhang2

  • 1NDT & E Laboratory, Dalian University of Technology, Dalian 116024, China.

Ultrasonics
|August 25, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的超声波成像方法,该方法结合了空间频率亚采样和分布式压缩传感. 该技术显著减少了数据需求,同时保持了用于缺陷检测的高图像质量.

关键词:
压缩传感器 压缩传感器非破坏性测试是一种非破坏性测试.信号的重建信号的重建空间频率平行部分采样超声波成像 超声波成像

更多相关视频

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
09:02

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

423
Three-dimensional Optical-resolution Photoacoustic Microscopy
08:31

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

18.1K

相关实验视频

Last Updated: Jun 15, 2025

Blood Flow Imaging with Ultrafast Doppler
05:57

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

7.6K
Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
09:02

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

423
Three-dimensional Optical-resolution Photoacoustic Microscopy
08:31

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

18.1K

科学领域:

  • 非破坏性测试是指非破坏性测试.
  • 超声波成像 超声波成像
  • 信号处理 信号处理

背景情况:

  • 当前超声波测试面临着高硬件需求和有限数据存储的挑战.
  • 现有的方法往往需要大量的数据采集和处理能力.
  • 需要有效的超声波成像技术,减少数据足迹.

研究的目的:

  • 开发一种新的超声波成像方法,解决硬件和数据存储的局限性.
  • 为了实现快速和高质量的超声波成像检查,使用最小的亚样本数据.
  • 提高超声波检测的效率,以检测缺陷.

主要方法:

  • 实现了一个可编程设备,集成空间频率并行子采样.
  • 使用空间稀疏测量来进行信号亚抽样和频率亚抽样,以减少数据量.
  • 使用分布式压缩传感 (DCS) 和DCS-SOMP算法进行多通道数据重建.
  • 在带有人工缺陷的碳钢样本上进行实验.

主要成果:

  • 仅使用1/8的数据,实现了可比的图像质量来完成数据.
  • 成功地准确地定位和量化了缺陷.
  • 证明了空间频率并行子样本和DCS-SOMP对超声波成像的有效性.

结论:

  • 拟议的空间频率亚采样与DCS-SOMP相结合,为超声波成像提供了有效的解决方案.
  • 这种方法显著减少了硬件要求和数据存储需求.
  • 该技术为快速,高质量和数据效率的超声波缺陷检查提供了可行的途径.