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相关概念视频

Radial System Protection01:23

Radial System Protection

148
Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
148
Reclosers and Fuses01:26

Reclosers and Fuses

162
Automatic circuit reclosers enhance the protection of distribution circuits by interrupting and auto-reclosing an AC circuit according to a preset sequence. They effectively manage temporary faults on overhead distribution lines, often caused by tree limbs or wildlife, by briefly disrupting service to improve overall reliability. However, contact with reclosers or energized broken conductors on the ground can pose serious hazards.
A comprehensive protection scheme for radial distribution...
162
IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

1.1K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
1.1K
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

555
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
555
Line Protection with Impedance Relays01:27

Line Protection with Impedance Relays

134
Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
134
Rapidly Varying Flow01:24

Rapidly Varying Flow

138
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
138

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FFT-RDNet:一种基于时间频率域的入侵检测模型,用于物联网安全.

Bingjie Xiang1, Renguang Zheng2, Kunsan Zhang2

  • 1School of Ocean Informattion Engineering, Jimei University, Xiamen 361000, China.

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

FFT-RDNet为物联网 (IoT) 设备提供了一种高效的入侵检测系统 (IDS). 这种新的框架通过精确检测降低计算负载的威胁来增强安全性.

关键词:
金融金融公司 (FFT)深度可分离的卷积卷积.混合采样混合采样物联网的东西互联网.剩余网络的剩余网络

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科学领域:

  • 网络安全 网络安全
  • 网络安全 网络安全
  • 物联网 (IoT) 的物联网 (IoT) 的物联网.

背景情况:

  • 资源有限的物联网设备需要高效的入侵检测系统 (IDS) 来应对网络威胁.
  • 传统的IDS面临着高计算复杂性和有限的特征提取挑战,影响物联网环境中的准确性.

研究的目的:

  • 为资源有限的物联网设备开发一个轻量级的IDS框架,FFT-RDNet.
  • 提高物联网环境中入侵检测的准确性和效率.

主要方法:

  • 实施了一种混合ADASYN-Tomek Links战略,以应对阶级不平衡.
  • 引入了FFT-RDNet,这是一种使用深度可分离卷积和快速里埃转换 (FFT) 进行频域特征融合的新框架.
  • 使用双路径特征嵌入模块进行时间和频率域分析,融为2D特征空间.

主要成果:

  • 在NSL-KDD和CIC-IDS2018数据集上,FT-RDNet在最先进的IDS上表现优越.
  • 在准确性,精度,回忆和F1得分 (0.22-1%) 中取得了显著改善.
  • 展示了卓越的准确性,并大大降低了计算复杂性.

结论:

  • FFT-RDNet为物联网安全提供了一种高效准确的IDS解决方案.
  • 该框架的轻量级设计和有效的功能提取使其成为资源有限的物联网部署的理想选择.
  • 在动态物联网生态系统中,FT-RDNet有效地解决了传统IDS的局限性.