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Related Concept Videos

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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Three-Winding Transformers01:19

Three-Winding Transformers

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Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
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Energy Losses in Transformers01:21

Energy Losses in Transformers

1.0K
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be  the high resistance of the...
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The Ideal Transformer01:26

The Ideal Transformer

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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...
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Instrument Transformers01:23

Instrument Transformers

182
Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
182
Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

242
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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Related Experiment Video

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VisioTracker, an Innovative Automated Approach to Oculomotor Analysis
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ViTT: Vision Transformer Tracker.

Xiaoning Zhu1, Yannan Jia2, Sun Jian1

  • 1School of Electronic Information Engineering, Beihang University, Beijing 100191, China.

Sensors (Basel, Switzerland)
|August 28, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces the Vision Transformer Tracker (ViTT), a novel transformer-based model for multi-object tracking (MOT). ViTT effectively handles complex scenarios and occlusions, outperforming existing trackers on the MOT16 dataset.

Keywords:
MOTattentionbackbonetransformer

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Area of Science:

  • Computer Vision
  • Artificial Intelligence
  • Robotics

Background:

  • Multi-object tracking (MOT) is vital for multi-unmanned aerial vehicle (Multi-UAV) systems.
  • Traditional methods struggle with occlusion and complex environments.
  • Transformers, successful in NLP, show promise in computer vision tasks.

Purpose of the Study:

  • To propose a novel transformer-based model for multi-object tracking.
  • To leverage the global context modeling of transformers for improved tracking accuracy.
  • To address challenges in occlusion and complex scenarios within MOT.

Main Methods:

  • Developed the Vision Transformer Tracker (ViTT), utilizing a transformer encoder as the backbone.
  • Input images directly into the transformer architecture.
  • Employed multi-task learning for simultaneous object localization and appearance embedding extraction.

Main Results:

  • Achieved 65.7% MOTA on the MOT16 dataset.
  • Demonstrated superior performance compared to other typical multi-object trackers.
  • Showcased the effectiveness of transformer networks in complex computer vision tasks.

Conclusions:

  • Transformer-based networks are highly effective for complex computer vision tasks like MOT.
  • ViTT offers a promising direction for applying pure transformers in multi-object tracking.
  • The model paves the way for advanced tracking capabilities in Multi-UAV applications.