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相关概念视频

Transformers in Distribution System01:27

Transformers in Distribution System

159
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...
159
Types Of Transformers01:16

Types Of Transformers

1.1K
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...
1.1K
The Ideal Transformer01:26

The Ideal Transformer

905
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...
905
Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

205
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...
205
Transformers01:26

Transformers

1.2K
A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
1.2K

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相关实验视频

Updated: Sep 14, 2025

A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images
04:23

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互动感知变压器网络用于人与物体互动检测.

Weibo Jiang, Weihong Ren, Jiandong Tian

    IEEE transactions on cybernetics
    |July 24, 2025
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    概括
    此摘要是机器生成的。

    这项研究引入了一种交互意识的变压器网络 (IATN),用于人与物体交互 (HOI) 检测. 该模型有效地整合了隐性行动级和显式对象级信息,以改进HOI识别.

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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
    • 机器学习 机器学习

    背景情况:

    • 人与物体相互作用 (HOI) 检测旨在识别和分类人与物体之间的相互作用.
    • 目前的HOI方法通常依赖于变压器网络和明确的对象级先验.
    • 现有的方法忽视了HOI固有的关键隐性行动级信息.

    研究的目的:

    • 提出一个交互意识的变压器网络 (IATN) 进行增强的HOI检测.
    • 为了有效地整合隐含的行动层面和明确的对象层面的priors.
    • 提高HOI的联合定位和分类的准确性.

    主要方法:

    • 开发了一个互动意识的变压器网络 (IATN).
    • 引入了一个动作意识模块 (AAM) 来汇总场景级和实例级的动作先验.
    • 设计了一个以行动为导向的图 (AOG) 以共同聚合行动和对象级的priors.
    • 利用知识蒸来增强行动层面的优先事项.

    主要成果:

    • 拟议的IATN有效地利用隐含的行动级和明确的对象级priors.
    • 在HICO-DET和V-COCO数据集上的实验证明了该模型的有效性.
    • 交互意识的查询采集导致了更好的HOI预测.

    结论:

    • 拟议的IATN通过整合行动级信息,显著提升了HOI检测.
    • 共同利用隐式和显式先验的新方法提供了对HOI的更全面的理解.
    • IATN为准确的人物对象交互识别提供了一个强大的框架.