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

Susceptibility, Permittivity and Dielectric Constant01:26

Susceptibility, Permittivity and Dielectric Constant

2.7K
When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.
2.7K
Gauss's Law in Dielectrics01:17

Gauss's Law in Dielectrics

5.1K
Consider a polar dielectric placed in an external field. In such a dielectric, opposite charges on adjacent dipoles neutralize each other, such that the net charge within the dielectric is zero. When a polar dielectric is inserted in between the capacitor plates, an electric field is generated due to the presence of net charges near the edge of the dielectric and the metal plates interface. Since the external electrical field merely aligns the dipoles, the dielectric as a whole is neutral. An...
5.1K
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.8K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
1.8K
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

5.9K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
5.9K
Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

935
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
935
Capacitor With A Dielectric01:18

Capacitor With A Dielectric

4.8K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.8K

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

Multimodal EEG-EMG and FEM-Based Adaptive Control of Passive Upper-Limb Exoskeletons.

Sensors (Basel, Switzerland)·2026
Same author

An Improved SEM Preparation Workflow for Plasma Membrane Imaging in HepG2 and IM-9 Cells.

Bioengineering (Basel, Switzerland)·2026
Same author

Air-Coupled Ultrasound Systems for Biomedical Applications: Advances in Sensors, Electronic Interfaces and Signal Processing Strategies.

Sensors (Basel, Switzerland)·2026
Same author

Design of an Electronic Interface for Single-Photon Avalanche Diodes.

Sensors (Basel, Switzerland)·2024
Same author

Analytic Continuation, Phase Unwrapping, and Retrieval of the Refractive Index of Metamaterials from S-Parameters.

Sensors (Basel, Switzerland)·2024
Same author

Numerical Approaches for Recovering the Deformable Membrane Profile of Electrostatic Microdevices for Biomedical Applications.

Sensors (Basel, Switzerland)·2023

相关实验视频

Updated: Jan 13, 2026

Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids
07:51

Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids

Published on: April 10, 2017

10.8K

一个数据驱动的高斯过程回归模型用于混凝土复杂介电容量特性表征.

Giovanni Angiulli1, Mario Versaci2, Pietro Burrascano3

  • 1Department of Information Engineering, Infrastructures and Sustainable Energy, Mediterranea University, 89121 Reggio Calabria, Italy.

Sensors (Basel, Switzerland)
|October 29, 2025
PubMed
概括

高斯过程回归 (GPR) 有效地模拟了具体的具体模型.

关键词:
斯过程是高斯过程.混凝土混凝土混凝土是什么基于数据的建模.允许性的允许性.

更多相关视频

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
09:39

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

1.5K
Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
09:31

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

9.9K

相关实验视频

Last Updated: Jan 13, 2026

Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids
07:51

Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids

Published on: April 10, 2017

10.8K
Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
09:39

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

1.5K
Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
09:31

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

9.9K

科学领域:

  • 材料科学 材料科学 材料科学
  • 电气工程 电气工程
  • 土木工程 土木工程是指土木工程.

背景情况:

  • 准确的混凝土表征对于结构完整性至关重要.
  • 电磁波方法用于评估混凝土的性能.
  • 复杂介电电容率 (εr(f)) 对影响机械性能的物理参数敏感.

研究的目的:

  • 研究高斯过程回归 (GPR) 用于建模混凝土的复杂介电电容率 (εr(f)).
  • 将GPR的表现与已建立的Jonscher模型进行比较.
  • 评估GPR在跨频率的特征 εr f) 中的可靠性和准确性.

主要方法:

  • 利用高斯过程回归 (GPR),一种数据驱动的技术.
  • 使用通用Jonscher模型作为比较的基准.
  • 使用准确度指标和预测的置信区间评估模型性能.

主要成果:

  • 与Jonscher模型相比,GPR在描述混凝土复杂的介电电容度方面表现出更高的准确性.
  • GPR提供了可靠的预测与相关的置信区间,表明跨频率的估计可靠性.
  • εr(f) 的依赖频率的行为被GPR.有效地模拟.

结论:

  • 高斯过程回归是一种高效的数据驱动方法,用于建模混凝土的复杂介电电容.
  • 与Jonscher模型相比,GPR提供了更高的准确性和可靠性,用于 εr (f) 特性.
  • 准确的电容度建模有助于为建筑重建和维修做出明智的决定.