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Related Concept Videos

Types Of Transformers01:16

Types Of Transformers

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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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Transformers01:26

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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.
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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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Transformers in Distribution System01:27

Transformers in Distribution System

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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.
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In signal processing, signals are classified based on various characteristics: continuous-time versus discrete-time, periodic versus aperiodic, analog versus digital, and causal versus noncausal. Each category highlights distinct properties crucial for understanding and manipulating signals.
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Energy Losses in Transformers01:21

Energy Losses in Transformers

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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.
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Multi-modal transformer for fake news detection.

Pingping Yang1, Jiachen Ma1, Yong Liu1

  • 1Heilongjiang University, Harbin 150000, China.

Mathematical Biosciences and Engineering : MBE
|September 7, 2023
PubMed
Summary

This study introduces TGA, a novel transformer-based model for multi-modal fake news detection. TGA effectively fuses image and text features using attention mechanisms, significantly improving detection accuracy.

Keywords:
attention mechanismfake news detectionmultimodal fusionsemantic matching

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Area of Science:

  • Computer Science
  • Artificial Intelligence
  • Information Security

Background:

  • Fake news on social media poses a significant societal threat, particularly when it incorporates multimedia elements.
  • Existing multi-modal fake news detection methods struggle with extracting high-quality visual features and effectively fusing inter-modal information.
  • Current models often fail to leverage the feature disparity between images and text in fake news.

Purpose of the Study:

  • To propose a novel transformer-based model, TGA, for enhanced multi-modal fake news detection.
  • To address limitations in feature extraction and fusion within existing detection approaches.
  • To improve the accuracy and robustness of fake news detection systems.

Main Methods:

  • Utilized transformer models for distinct extraction of text and image features.
  • Implemented attention mechanisms for effective fusion of inter-modal features.
  • Incorporated the degree of feature similarity between text and images within the classifier.

Main Results:

  • The proposed TGA model demonstrated significant effectiveness on public datasets.
  • Experimental results validated the superiority of TGA over existing multi-modal fake news detection methods.
  • The attention-based fusion and feature similarity utilization contributed to improved detection performance.

Conclusions:

  • The TGA model offers a promising advancement in multi-modal fake news detection.
  • Transformer-based feature extraction and attention fusion are key to improving detection accuracy.
  • Leveraging feature similarity is crucial for robust fake news identification.