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相关概念视频

Types Of Transformers01:16

Types Of Transformers

943
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...
943
The Ideal Transformer01:26

The Ideal Transformer

342
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...
342
Transformers in Distribution System01:27

Transformers in Distribution System

98
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...
98
Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

129
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...
129
Energy Losses in Transformers01:21

Energy Losses in Transformers

819
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...
819
Equivalent Circuits for Practical Transformers01:28

Equivalent Circuits for Practical Transformers

377
The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
377

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Updated: May 24, 2025

A Novel Experimental and Analytical Approach to the Multimodal Neural Decoding of Intent During Social Interaction in Freely-behaving Human Infants
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一个视觉转换器架构用于从ECoG数据中解码公开的语音.

Mohamed Baha Ben Ticha, Xingchen Ran, Philemon Roussel

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
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    概括
    此摘要是机器生成的。

    本研究介绍了一种新的语音脑计算机接口,使用视觉变压器 (ViT) 编码器和双向LSTM. 这种方法增强了来自神经活动的实时语音合成,并通过动态时间扭曲数据增强提高了解码性能.

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    Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
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    Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception
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    A Novel Experimental and Analytical Approach to the Multimodal Neural Decoding of Intent During Social Interaction in Freely-behaving Human Infants
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    Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception
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    科学领域:

    • 神经科学是一个神经科学.
    • 计算机科学 计算机科学
    • 人工智能的人工智能

    背景情况:

    • 语音脑计算机接口 (BCI) 将神经活动解码为合成语音.
    • 一个关键的挑战是实时,可理解的语音合成从连续的大脑活动没有限制性语言模型.
    • 当前的BCI经常在自然,言论自由的生产中面临限制.

    研究的目的:

    • 开发和评估一种新的语音编码解码器架构BCI.
    • 将基于视觉变压器 (ViT) 的编码器与卷积神经网络 (CNN) 编码器进行比较.
    • 引入和评估基于动态时间扭曲 (DTW) 的数据增强策略.

    主要方法:

    • 一种使用多层视觉变压器 (ViT) 来将神经数据编码到潜在空间的编码器-解码器架构.
    • 一个双向的LSTM循环网络,将隐性变量转换为声学系数.
    • 与使用卷积神经网络 (CNN) 进行编码的传统架构进行比较.
    • 使用动态时间扭曲 (DTW) 实现数据驱动的数据增强策略.

    主要成果:

    • 与基于卷积神经网络 (CNN) 的编码器相比,基于视觉转换器 (ViT) 的编码器在预测线下产生的语音方面表现优越.
    • 基于动态时间扭曲 (DTW) 的数据增强策略显著改善了语音解码性能.
    • 拟议的架构显示了BCI中更自然和更易理解的语音合成的前景.

    结论:

    • 视觉转换器 (ViT) 架构对于编码语音BCI中的神经活动是有效的.
    • 动态时间扭曲 (DTW) 数据增强增强了语音解码模型的稳定性和准确性.
    • 这些进步代表了迈向实时,从大脑活动中自然语音合成的重要一步.