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相关概念视频

Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

213
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...
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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...
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Transformers in Distribution System01:27

Transformers in Distribution System

167
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...
167
The Ideal Transformer01:26

The Ideal Transformer

926
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...
926
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
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

549
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
549

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用一个多功能变压器重新审视基于罗的3D单个对象跟踪.

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    此摘要是机器生成的。

    一种新的多功能点跟踪变压器 (VPTT) 方法通过使用变压器启发的建模来增强3D单个对象跟踪 (SOT). 这种方法可以提高复杂,稀疏的点云数据的跟踪精度和效率.

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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
    • 机器人技术 机器人技术 机器人技术

    背景情况:

    • 对于自动驾驶和规划等应用来说,3D单个对象跟踪 (SOT) 是至关重要的.
    • 3D SOT的挑战包括稀疏的点云和复杂的影响因素.
    • 现有的方法很难有效地处理3D空间数据的复杂性.

    研究的目的:

    • 为有效的3D SOT提出一种全新的多功能点跟踪变压器 (VPTT) 方法.
    • 为了利用变压器架构,在稀疏的3D点云中改进对象跟踪.
    • 为3D跟踪任务开发一个多功能和高效的端到端可训练模型.

    主要方法:

    • 一个基于Siamese的跟踪范式,利用对象引导从模板到搜索点云.
    • 在深度变压器网络 (VerFormer) 中实施自我和交叉注意力机制.
    • 整合了四个专门的匹配操作和中间输出预测 (面具概率,距离,方向角度).

    主要成果:

    • 在具有挑战性的基准 (KITTI,nuScenes,Waymo) 上,VPTT展示了最先进的跟踪性能.
    • 该方法实现了高效率,在基于米的跟踪上运行约62 FPS.
    • 专门的设计使得3D跟踪的有效端到端培训成为可能.

    结论:

    • 拟议的VPTT方法在3D单个对象跟踪方面取得了重大进展.
    • 基于变压器的方法在跟踪中处理稀疏点云数据方面非常有效.
    • VPTT为现实世界3D SOT应用提供了一种多功能和高效的解决方案.