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

Magnetic Damping01:17

Magnetic Damping

Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
Cascaded Op Amps01:16

Cascaded Op Amps

Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence of...

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

Acoustic strategy for avoiding same-sex amplexus in male concave-eared torrent frogs.

Current biology : CB·2026
Same author

Synchronous wearable ultrasound for early detection of coronary and carotid artery comorbidity.

Science advances·2026
Same author

A CRISPR/Cas13a-Based One-Step System for Rapid Detection of Emerging Viruses: Deployment during the Chikungunya Outbreak in Guangdong Province, China.

ACS sensors·2026
Same author

Polar-coordinated contour processing algorithm in optimizing SCART treatment volume.

Frontiers in oncology·2026
Same author

PRKN Ser131 phosphorylation promotes cigarette smoke-induced mitophagy impairment and epithelial cell senescence via MKK3/p38 MAPK activation: An in vitro and in vivo study.

Tobacco induced diseases·2026
Same author

Site-Specific Olfactory Cleft Opacification Predicts Olfactory Function and Olfactory Training Outcome in Persistent Postinfection Olfactory Dysfunction.

International forum of allergy & rhinology·2026

相关实验视频

Updated: Jul 17, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy
08:31

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

18.8K

双模式多麦克风增强光声气体传感系统使用波导环阵列.

Yang Chen1, Linzhao Jiang2, Guankui Sun1

  • 1State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, No. 29 Yudao Street, Nanjing 210016, China.

Analytical chemistry
|November 14, 2025
PubMed
概括

这项研究引入了一种新的光声细胞模块,用于微量气体检测. 它使用多个麦克风显著提高了对氨和二氧化等气体的检测极限和灵敏度.

更多相关视频

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
08:32

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

Published on: January 29, 2013

14.3K
Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization
07:14

Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization

Published on: July 15, 2020

4.5K

相关实验视频

Last Updated: Jul 17, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy
08:31

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

18.8K
Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
08:32

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

Published on: January 29, 2013

14.3K
Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization
07:14

Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization

Published on: July 15, 2020

4.5K

科学领域:

  • 光学和光子学 在光学和光子学.
  • 频谱学是一种光谱学.
  • 传感器技术 传感器技术

背景情况:

  • 光声谱学 (PAS) 是一种敏感的气体检测技术.
  • 现有的PAS系统可能受到灵敏度和检测极限的限制.
  • 麦克风阵列在声学传感中提供了信号增强的潜力.

研究的目的:

  • 开发和评估一种新的波导环阵列光声细胞 (PAC) 模块.
  • 通过使用多元麦克风信号增强来增强微量气体检测能力.
  • 为了评估PAC模块在不同光源和目标气体的性能.

主要方法:

  • 在叠加和自我差异模式下模拟PAC的振动特性.
  • 使用分布式反 (DFB) 激光和激光二极管 (LD) 的实验评估.
  • 检测氨 (NH3) 和二氧化 (NO2) 作为目标分析物.

主要成果:

  • 来自八个MEMS麦克风的叠加信号使最小检测极限 (MDL) 提高了60-70%,灵敏度提高了近8倍.
  • 达到的MDL为NH3的1.43ppm和NO2的33ppb.
  • 自差模式证明了有效的常用模式噪声排斥.

结论:

  • 开发的PAC模块在微量气体检测性能方面提供了显著的改进.
  • 紧,低成本的模块显示了增强商业PAS系统的潜力.
  • 多元麦克风信号增强是改善PAS灵敏度和检测极限的可行策略.