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Related Concept Videos

Instrument Transformers01:23

Instrument Transformers

84
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...
84
Types Of Transformers01:16

Types Of Transformers

975
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...
975
Energy Losses in Transformers01:21

Energy Losses in Transformers

872
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...
872
The Ideal Transformer01:26

The Ideal Transformer

391
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...
391
Three-Winding Transformers01:19

Three-Winding Transformers

224
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...
224
Power Factor Correction01:20

Power Factor Correction

176
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
176

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Enabling High Grayscale Resolution Displays and Accurate Response Time Measurements on Conventional Computers
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VRT: A Video Restoration Transformer.

Jingyun Liang, Jiezhang Cao, Yuchen Fan

    IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
    |March 7, 2024
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    Summary
    This summary is machine-generated.

    The Video Restoration Transformer (VRT) enhances video quality by using temporal information from multiple frames. This novel approach achieves state-of-the-art results across various video restoration tasks.

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    Area of Science:

    • Computer Vision
    • Artificial Intelligence
    • Signal Processing

    Background:

    • Video restoration requires leveraging temporal information from adjacent, often misaligned, frames.
    • Existing deep learning methods are often limited by frame-by-frame processing using sliding windows or recurrent architectures.

    Purpose of the Study:

    • To introduce a novel Video Restoration Transformer (VRT) architecture capable of parallel frame prediction.
    • To improve the efficiency and effectiveness of video restoration techniques.

    Main Methods:

    • The proposed VRT utilizes a multi-scale architecture with Temporal Reciprocal Self Attention (TRSA) and parallel warping modules.
    • TRSA enables joint motion estimation, feature alignment, and fusion within video clips, while self-attention extracts features.
    • Cross-clip interactions are facilitated by shifting the video sequence, and parallel warping fuses information from neighboring frames.

    Main Results:

    • VRT demonstrated superior performance across five video restoration tasks: super-resolution, deblurring, denoising, frame interpolation, and space-time super-resolution.
    • The method achieved significant improvements, outperforming state-of-the-art approaches by up to 2.16dB on fourteen benchmark datasets.

    Conclusions:

    • The VRT architecture offers a powerful and efficient solution for various video restoration challenges.
    • Its parallel frame prediction capability and advanced attention mechanisms represent a significant advancement in the field.