Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Galvanometer01:25

Galvanometer

2.2K
Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
The galvanometer consists of  two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform...
2.2K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

4.7K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
4.7K
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

3.6K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
3.6K
Magnetic Force On A Current-Carrying Conductor01:25

Magnetic Force On A Current-Carrying Conductor

4.1K
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor carrying a current creates a magnetic field around it.
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...
4.1K
Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

4.1K
A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
4.1K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

318
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
318

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Circular inference in visual cortical hierarchies in schizophrenia.

Psychiatry and clinical neurosciences·2026
Same author

Behavioral and psychological factors associated with sleep-related symptoms and daytime sleepiness in Japanese Sports and Health Sciences undergraduates: a cross-sectional study.

Sleep and biological rhythms·2026
Same author

IL-6 and TNFα are associated with depressive symptoms among men in a community-based cohort, with a tentative trend for IL-17A: Findings from the Shika Study in Japan.

Neuro endocrinology letters·2026
Same author

Predictors and Procedural Outcomes of Additional Balloon Dilatation Success Following Vessel Preparation Failure in Femoropopliteal Lesions.

Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists·2026
Same author

Transient epigenetic changes promote cardiomyocyte differentiation of the subcutaneous adipose stromal vascular fraction.

Regenerative therapy·2026
Same author

Dietary omega-3 polyunsaturated fatty acids relate to lower liver lipids and adipose-tissue insulin resistance, modulated by fatty acid desaturase 1 rs174546 in type 2 diabetes.

Clinical nutrition (Edinburgh, Scotland)·2026

相关实验视频

Updated: Jul 24, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.2K

光学磁计的传感器阵列设计,用于准确估计源电流.

Yusuke Takeda1, Tomohiro Gomi2, Ryu Umebayashi2

  • 1Computational Brain Dynamics Team, RIKEN Center for Advanced Intelligence Project, 2-2-2 Hikaridai, Seika-cho, Soraku-gun, Kyoto, 619-0288, Japan; Department of Computational Brain Imaging, ATR Neural Information Analysis Laboratories, 2-2-2 Hikaridai, Seika-cho, Soraku-gun, Kyoto, 619-0288, Japan.

NeuroImage
|July 1, 2023
PubMed
概括

我们开发了基于分辨率矩阵 (SORM) 的传感器阵列优化,以设计最佳的光磁计 (OPM) 传感器阵列. 索尔姆可以提高磁脑电图 (MEG) 在特定大脑区域的精度,特别是在有限的传感器的情况下.

关键词:
磁脑电图 (MEG) 是一种磁脑电图.光学式磁力计 (OPM) 是一种光学式磁力计.解析度矩阵是一个分辨率矩阵.传感器阵列是一组传感器阵列.源图像成像的使用方法

更多相关视频

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.7K
High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

2.2K

相关实验视频

Last Updated: Jul 24, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.2K
Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.7K
High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

2.2K

科学领域:

  • 神经科学是一个神经科学.
  • 生物物理学的生物物理.
  • 生物医学工程 生物医学工程

背景情况:

  • 光学磁计 (OPM) 提供了新一代紧的,室温磁脑图 (MEG) 系统,使可穿戴应用成为可能.
  • 设计最佳的传感器阵列对于最大限度地提高OPM-MEG系统的性能至关重要,特别是当使用有限数量的传感器用于特定的兴趣大脑区域 (ROI) 时.

研究的目的:

  • 提出和评估一种新的方法,基于分辨率矩阵 (SORM) 的传感器阵列优化,用于设计针对ROI准确的皮质电流估计的OPM传感器阵列.
  • 优化传感器的位置,以提高对ROI的灵敏度,并减少来自其他大脑区域的信号泄漏.

主要方法:

  • 在SORM方法中,使用最小规范估计 (MNE) 的分辨率矩阵来顺序确定传感器位置.
  • 优化侧重于提高反向波器的指向ROI的准确度,并尽量减少信号污染.
  • 使用模拟和真实OPM-MEG数据来验证SORM方法的有效性.

主要成果:

  • 由SORM设计的传感器阵列表现出高的有效等级和对目标ROI的增强灵敏度.
  • 设计的阵列提高了使用MNE和其他反向方法进行皮质电流估计的准确性.
  • 与真实OPM-MEG数据的验证证实了SORM的实际实用性.

结论:

  • SORM为设计OPM传感器阵列提供了一种有效的策略,特别有利于需要精确的ROI活动估计的应用,而传感器数量有限.
  • 这种方法具有很大的潜力,可以促进大脑机器接口的发展,并通过OPM-MEG改善大脑疾病的诊断.