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

Equivalent Circuits for Practical Transformers01:28

Equivalent Circuits for Practical Transformers

421
The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
421
Properties of Fourier Transform I01:21

Properties of Fourier Transform I

174
The application of Fourier Transform properties in radio broadcasting is multifaceted, enabling significant advancements in the way signals are transmitted and received. Key areas where these properties are utilized include simultaneous multi-channel transmission, audio clip speed adjustments, live broadcast delays for different time zones, audio frequency adjustments, and signal demodulation.
In radio broadcasting, multiple audio signals often need to be transmitted simultaneously. The Fourier...
174
Properties of Fourier Transform II01:24

Properties of Fourier Transform II

213
The Fourier Transform (FT) is an essential mathematical tool in signal processing, transforming a time-domain signal into its frequency-domain representation. This transformation elucidates the relationship between time and frequency domains through several properties, each revealing unique aspects of signal behavior.
The Frequency Shifting property of Fourier Transforms highlights that a shift in the frequency domain corresponds to a phase shift in the time domain. Mathematically, if x(t) has...
213
IR Frequency Region: X–H Stretching01:24

IR Frequency Region: X–H Stretching

972
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...
972
Continuous -time Fourier Transform01:11

Continuous -time Fourier Transform

316
The Fourier series is instrumental in representing periodic functions, offering a powerful method to decompose such functions into a sum of sinusoids. This technique, however, necessitates modification when applied to nonperiodic functions. Consider a pulse-train waveform consisting of a series of rectangular pulses. When these pulses have a finite period, they can be accurately represented by a Fourier series. Yet, as the period approaches infinity, resulting in a single, isolated pulse, the...
316
Types Of Transformers01:16

Types Of Transformers

975
Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
975

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

Effect of structural and field parameters on optical refractive index changes in an asymmetric GaAs/AlGaAs three-step quantum well.

Optics letters·2025
Same author

Toxic Effect of Metal Doping on Diatoms as Probed by Broadband Terahertz Time-Domain Spectroscopy.

Molecules (Basel, Switzerland)·2022
Same author

A solid-state nanopore-based single-molecule approach for label-free characterization of plant polysaccharides.

Plant communications·2021
Same author

Recombinase polymerase amplification with lateral flow strip for detecting Babesia microti infections.

Parasitology international·2021
Same author

A novel protein encoded by circMAPK1 inhibits progression of gastric cancer by suppressing activation of MAPK signaling.

Molecular cancer·2021
Same author

A calcineurin-mediated scaling mechanism that controls a K<sup>+</sup>-leak channel to regulate morphogen and growth factor transcription.

eLife·2021

相关实验视频

Updated: Jul 1, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.6K

CSFwinformer:用于镜子检测的跨空间频率窗口变压器.

Zhifeng Xie, Sen Wang, Qiucheng Yu

    IEEE transactions on image processing : a publication of the IEEE Signal Processing Society
    |March 7, 2024
    PubMed
    概括

    本研究介绍了跨空间频率窗口变压器 (CSFwinformer),通过分析空间和频率特征来进行强大的镜像检测. 这种新的方法有效地识别了各种场景中的镜子,优于现有的技术.

    科学领域:

    • 计算机视觉 计算机视觉
    • 人工智能的人工智能
    • 图像处理 图像处理

    背景情况:

    • 镜子检测是具有挑战性的,因为不一致的视觉外观和目前依赖现场假设的方法的局限性.
    • 现有的方法在缺乏对象对应或清晰的语义关联的场景中失败,甚至像Segment Anything Model (SAM) 这样的高级模型也在精确的镜像定位方面扎.
    • 人类的镜子识别依赖于镜面纹理,这是当前计算方法未能充分利用的一个特征.

    研究的目的:

    • 开发一种可通用的镜像检测方法,克服现有方法的局限性.
    • 为了利用空间和频率域特征,在镜像识别中进行增强的纹理分析.
    • 提高镜像检测的性能,包括提高像SAM这样的模型的能力.

    主要方法:

    • 提出了一个跨空间频率窗口变压器 (CSFwinformer) 模型,用于提取空间和频率特征.
    • 引入了一个空间频率窗口对齐 (SFWA) 模块,以计算特征亲和度,并区分镜像纹理.
    • 开发了用于全球特征提取的扩展窗口注意力 (DWA) 和用于融合多模式和全球特征的跨模式上下文对比 (CMCC) 模块.

    主要成果:

    • 与最先进的方法相比,CSFwinformer方法在镜像检测的三个基准数据集上表现出更高的性能.

    更多相关视频

    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
    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
    10:28

    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

    Published on: July 5, 2016

    10.3K

    相关实验视频

    Last Updated: Jul 1, 2025

    Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
    07:01

    Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

    Published on: June 9, 2016

    9.6K
    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
    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
    10:28

    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

    Published on: July 5, 2016

    10.3K
  • 在使用拟议方法应用于镜像检测任务时,观察到细分任何模型 (SAM) 的性能有显著改善.
  • 该方法通过通过空间和频率领域分析纹理,有效地挖掘更一般场景中的镜像特征.
  • 结论:

    • 拟议的CSFwinformer通过利用空间,频率和跨模式特征的新组合,有效地解决了一般镜像检测方面的挑战.
    • 该方法在准确定位镜子方面提供了显著的进步,超过了当前的基准,并增强了像SAM这样的现有模型.
    • 这项研究为镜像检测提供了一个更强大,更通用的解决方案,适用于更广泛的现实场景.