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

Bending of Curved Members - Neutral Surface01:16

Bending of Curved Members - Neutral Surface

488
In curved beams, unlike straight beams, the stress distribution across the cross-section is not uniform due to the beam's curvature. This non-uniformity arises because the neutral axis, where stress is zero, does not align with the centroid of the section. In a curved beam, the strain varies along the section as a function of the distance from the neutral axis.
Consider the curved member described in the previous lesson. According to Hooke's law, which relates stress to strain within the...
488
Curvilinear Motion: Normal and Tangential Components01:27

Curvilinear Motion: Normal and Tangential Components

832
When a car traverses a curved road, its motion can be elucidated by breaking it down into tangential and normal components. The car-centric coordinates attached to the vehicle move with it.
The positive direction of the t-axis aligns with the increasing position of the car along the curved path, denoted by the unit vector ut. Simultaneously, the n-axis, perpendicular to the t-axis, dissects the curved path into differential arc segments, each forming the arc of a circle with a radius of...
832
Hydrostatic Pressure Force on a Curved Surface01:04

Hydrostatic Pressure Force on a Curved Surface

2.5K
Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
2.5K
Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

9.3K
A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...
9.3K
Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

9.3K
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
9.3K
Gauss's Law: Spherical Symmetry01:26

Gauss's Law: Spherical Symmetry

9.0K
A charge distribution has spherical symmetry if the density of charge depends only on the distance from a point in space and not on the direction. In other words, if the system is rotated, it doesn't look different. For instance, if a sphere of radius R is uniformly charged with charge density ρ0, then the distribution has spherical symmetry. On the other hand, if a sphere of radius R is charged so that the top half of the sphere has a uniform charge density ρ1 and the bottom half has a...
9.0K

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

IRG1/Itaconate Inhibits Microglial Senescence-Like Transition by Modulating Mitochondrial Dynamics through Rhoa Alkylation in Subarachnoid Hemorrhage.

Aging and disease·2026
Same author

Examining public acceptance intentions for government digital human through expectation confirmation and technology acceptance models.

Scientific reports·2026
Same author

Physical activity, sedentary behavior, and adolescent health: a narrative review.

Frontiers in public health·2026
Same author

Comprehensive evaluation of air pollution at Zhenjiang port based on the un-weighted TOPSIS method.

Environmental monitoring and assessment·2026
Same author

Chirality-Modulated Glycopeptide Antibacterial Immunotherapy Against Osteomyelitis.

Advanced healthcare materials·2026
Same author

Fine structural features of polysaccharides and gut microbiota Co-regulate mucin O-glycosylation: Mechanisms and advances.

Carbohydrate polymers·2026

相关实验视频

Updated: Jan 18, 2026

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.8K

准确的表面正常表示,以促进在曲表面上的梯度线圈优化.

Hao Ren1,2, Hui Pan2, Feng Jia3

  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China.

Magnetic resonance letters
|September 8, 2025
PubMed
概括

这项研究引入了Delaunay三角法,用于在任意表面上设计梯度线圈. 这种方法确保了复杂的,扫描的几何形状的几何精度,推进了线圈设计超出了简单的分析形状.

关键词:
德劳内三角形测定方法渐变线圈的渐变线圈是一种渐变线圈.简单的SIMP方法流功能 流功能 流功能

更多相关视频

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
07:32

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Published on: April 10, 2017

9.4K
How to Measure Cortical Folding from MR Images: a Step-by-Step Tutorial to Compute Local Gyrification Index
09:57

How to Measure Cortical Folding from MR Images: a Step-by-Step Tutorial to Compute Local Gyrification Index

Published on: January 2, 2012

28.5K

相关实验视频

Last Updated: Jan 18, 2026

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.8K
Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
07:32

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Published on: April 10, 2017

9.4K
How to Measure Cortical Folding from MR Images: a Step-by-Step Tutorial to Compute Local Gyrification Index
09:57

How to Measure Cortical Folding from MR Images: a Step-by-Step Tutorial to Compute Local Gyrification Index

Published on: January 2, 2012

28.5K

科学领域:

  • 磁共振成像 (MRI) 是一种磁共振成像技术.
  • 计算几何学的计算几何学
  • 电磁学 电磁学 电磁学 电磁学

背景情况:

  • 梯度线圈设计传统上依赖于像Biot-Savart集成这样的离散方法,这些方法对表面正常向量精度敏感.
  • 现有的方法仅限于正规或分析表面,限制了复杂几何形状的应用.
  • 来自扫描点云的任意表面需要先进的设计技术来准确地构建梯度线圈.

研究的目的:

  • 将梯度线圈设计方法扩展到任意的,非分析表面.
  • 为了确保复杂,扫描的3D几何形状的线圈设计的几何精度.
  • 适应现有的设计方法,以零碎连续的表面.

主要方法:

  • 应用Delaunay三角法来近似任意的表面,并准确计算离散的正常向量.
  • 使用流函数方法来设计梯度线圈.
  • 在梯度线圈设计中采用有处罚的固体同位素材料 (SIMP) 方法.

主要成果:

  • 德劳内三角形有效地近似光滑的表面,为任意几何形状产生准确的离散正常向量.
  • 在一般的非分析性表面上成功设计圆形和非圆形梯度线圈.
  • 证明了将已建立的线圈设计方法扩展到复杂的扫描数据的可行性.

结论:

  • 德劳内三角法为任意表面准确的梯度线圈设计提供了强大的框架.
  • 开发的方法使得为以前无法实现的复杂几何形状创建精确的梯度线圈.
  • 这一进步扩大了MRI技术对复杂的解剖结构和定制设计的适用性.