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相关概念视频

Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

629
In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the...
629
Transformers in Distribution System01:27

Transformers in Distribution System

546
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
546
Types Of Transformers01:16

Types Of Transformers

1.6K
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...
1.6K
The Ideal Transformer01:26

The Ideal Transformer

1.5K
In single-phase two-winding transformers, two windings are coiled around a magnetic core characterized by cross-sectional area A and magnetic permeability μ. A phasor current i1 enters the left winding while i2 exits the right winding, establishing the fundamental working of the transformer through electromagnetic principles.
Ampere's Law forms the basis of understanding the magnetic field within the transformer. It states that the integral of the magnetic field intensity's tangential...
1.5K

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相关实验视频

Updated: Mar 2, 2026

A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images
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A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images

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雾道路场景的图像预测算法基于改进的变压器.

Bo-Tao Zhang1, Ai-Ying Zhao2, Pei Xiong3

  • 1College of Science, Shihezi University, Shihezi, 832003, China. 20221006184@stu.shzu.edu.cn.

Scientific reports
|March 1, 2026
PubMed
概括

本研究介绍了一种基于变压器的雾状图像预测算法,以提高在严重雾中自动驾驶的安全性. 该方法通过在雾条件下有效预测道路场景来提高可见性.

关键词:
自动驾驶自动驾驶的自动驾驶.雾的道路场景 雾的道路场景图像预测 图像预测多头自我注意力系统变压器变压器变压器

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04:23

A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images

Published on: April 21, 2023

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科学领域:

  • 计算机视觉 计算机视觉
  • 人工智能的人工智能
  • 自主驾驶系统 自主驾驶系统

背景情况:

  • 严重的雾天气显著降低驾驶可见度,对道路安全构成重大风险.
  • 当前的自动驾驶系统在恶劣的天气条件下 (如重雾) 难以进行感知和预测.

研究的目的:

  • 建议使用变压器架构对道路场景进行雾状图像预测算法.
  • 提高在严重雾天气中自动驾驶系统的视觉感知和预测能力.

主要方法:

  • 利用一个变压器模型与泰勒扩展的多头自我注意力来降低计算成本.
  • 实现了多分支架构,具有多尺度补丁嵌入,具有可变形卷积用于特征提取.
  • 在道路场景中开发了一种用于雾图像预测的算法.

主要成果:

  • 在定制的雾数据集上,达到12.9836的峰值信号噪声比 (PSNR) 和0.6278的结构相似度指数 (SSIM).
  • 在模糊的天气条件下有效预测真实图像.
  • 展示了良好的图像预测结果,计算性能要求相对较低.

结论:

  • 拟议的基于变压器的方法有效地改善了雾条件下的可见性,解决了关键的驾驶安全问题.
  • 该算法通过在恶劣天气中提高性能,为自动驾驶技术的发展做出了贡献.
  • 该方法为在雾环境中实时图像预测和感知提供了可行的解决方案.