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

Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

137
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
137
Gain01:15

Gain

239
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
239
IR Frequency Region: X–H Stretching01:24

IR Frequency Region: X–H Stretching

1.1K
In IR spectroscopy, signals produced by the X−H bonds (such as C−H, O−H, or N−H) can be observed in the frequency range of  2700–4000 cm–1. The C−H stretching vibration forms sharp bands in the region 2850–3000 cm–1. The presence of the O−H stretching vibration leads to the forming of an absorption band in the frequency range 3650–3200 cm−1. At the same time, N−H stretching can be confirmed by absorption bands in...
1.1K
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

506
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
506
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

1.2K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
1.2K
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

148
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...
148

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

CIMatcher: Cross-scale interaction matcher for accurate local feature matching.

Neural networks : the official journal of the International Neural Network Society·2026
Same author

Fiber-optic triggering of a two-stage high-current linear transformer driver with laser energy below 100 μJ.

The Review of scientific instruments·2026
Same author

Suppressing Interfacial-Accelerated Degradation in Perovskite Solar Cells via Supramolecular Co-Assembly.

Angewandte Chemie (International ed. in English)·2026
Same author

Retraction notice to "Study on the effect of SDBS and SDS on deep coal seam water injection" [Sci. Total Environ. 856 (2023) 158930].

The Science of the total environment·2026
Same author

Safety and efficacy of the MNK/VEGFR inhibitor JDB153 combined with the anti-PD-1 antibody serplulimab in patients with advanced pancreatic cancer refractory to standard treatment: a single-arm, phase Ib/II study protocol.

Frontiers in pharmacology·2026
Same author

Targeting Glycolytic Plasticity to Overcome Therapy Resistance in Cancer Stem Cells: Mechanisms and Clinical Perspectives.

Cells·2026

相关实验视频

Updated: Sep 11, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

8.1K

不同质的IRS辅助毫米波系统:元素位置和相位转移优化

Weibiao Zhao1, Qiucen Wu1, Hao Wei2

  • 1Key Laboratory for Information Science of Electromagnetic Waves (MoE), School of Information Science and Technology, Fudan University, Shanghai 200433, China.

Sensors (Basel, Switzerland)
|August 14, 2025
PubMed
概括

这项研究引入了一种绿色异质智能反射表面 (HE-IRS),具有可调节元件. 优化的元素放置和相位转移使得未来网络的电力消耗显著降低,从而实现竞争性性能.

关键词:
考西·施瓦茨 (Cauchy-Schwarz) 的边界是有限的.不同质的智能反射表面.多种多样的优化优化.毫米波系统的毫米波系统.粒子群集优化 粒子群集优化

更多相关视频

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

9.9K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.5K

相关实验视频

Last Updated: Sep 11, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

8.1K
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

9.9K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.5K

科学领域:

  • 无线通信无线通信
  • 超材料是指一种超材料.
  • 优化算法 优化算法

背景情况:

  • 智能反射表面 (IRS) 对未来的网络至关重要,但由于众多因素,它们在电力消耗和成本方面面临挑战.
  • 一种新的绿色异质IRS (HE-IRS) 集成动态调节元件 (DTE) 和静态调节元件 (STE) 来缓解这些问题.
  • 独特的HE-IRS结构需要对元素定位和相位移进行新的优化策略.

研究的目的:

  • 在HE-IRS辅助的毫米波系统中调查和解决元素位置和相位转移优化问题.
  • 开发高效的算法,以优化HE-IRS.内的DTE和STE配置.
  • 与传统的IRS相比,证明优化HE-IRS的性能优势.

主要方法:

  • 粒子集群优化 (PSO) 算法用于确定最佳的DTE和STE位置.
  • 多重优化用于STEs的相位转移优化,加上DTE相位转移的封闭形式解决方案.
  • 一个低复杂度的相位转移优化算法,用于DTE和STEs使用Cauchy-Schwarz边界.

主要成果:

  • 拟议的PSO算法有效地确定了DTE和STE的最佳位置.
  • 开发的相位转移优化方法实现了HE-IRS的高效配置.
  • 模拟结果证实,优化的HE-IRS实现了与传统IRS可比的性能,功耗大大降低.

结论:

  • 定制的元素位置和相位转移优化算法对HE-IRS有效.
  • HE-IRS为节能通信网络提供了一个有前途的解决方案.
  • 这项研究通过优化智能反射面来促进绿色通信技术的进步.