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Types Of Transformers01:16

Types Of Transformers

1.7K
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...
1.7K
The Ideal Transformer01:26

The Ideal Transformer

1.5K
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 tangential...
1.5K
Brain Imaging01:14

Brain Imaging

838
Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
838
Transformers in Distribution System01:27

Transformers in Distribution System

549
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...
549
Neural Circuits01:25

Neural Circuits

3.1K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
3.1K

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相关实验视频

Updated: Mar 12, 2026

Modeling the Functional Network for Spatial Navigation in the Human Brain
05:55

Modeling the Functional Network for Spatial Navigation in the Human Brain

Published on: October 13, 2023

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没有阿特拉斯的大脑网络变压器

Shuai Huang, Xuan Kan, James J Lah

    ArXiv
    |March 11, 2026
    PubMed
    概括

    这项研究引入了一个无图谱的大脑网络变压器 (BNT) 以实现更可靠的大脑网络分析. 这种新的方法提高了针对个性化医学的神经成像生物标志物的精度和稳定性.

    科学领域:

    • 神经科学是一个神经科学.
    • 计算神经科学是一种神经科学.
    • 医疗成像医学成像

    背景情况:

    • 目前的大脑网络分析依赖于固定的地图,导致空间错位和功能异质.
    • 这些局限性阻碍了大脑网络研究的可靠性和可解释性.

    研究的目的:

    • 开发一种新的无图谱大脑网络变压器 (BNT),用于个性化大脑分片.
    • 克服大脑网络分析中传统的以图书馆为基础的方法的局限性.

    主要方法:

    • 利用特定对象的静止状态fMRI数据进行个性化大脑分片.
    • 在基于voxel的标准化功能空间中计算的ROI-to-voxel连接功能.
    • 采用BNT架构来生成可比的主题级嵌入式.

    主要成果:

    • 无图谱的BNT在性别分类和大脑连接组年龄预测方面超过了基于图谱的最新方法.
    • 在脑网络分析的精度,稳定性和通用性方面取得了显著的改进.
    • 与弹性网,BrainGNN,Graphormer和原始BNT相比,这种方法显示出更高的性能.

    结论:

    • 无图谱的BNT为大脑网络分析提供了更可靠,更易于解释的方法.

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  • 这一进步有可能增强神经成像生物标志物,用于个性化精密医学.
  • 该方法为改进的临床诊断工具提供了坚实的基础.