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相关概念视频

Determining Electric Field From Electric Potential01:12

Determining Electric Field From Electric Potential

4.5K
The electric field and electric potential are related to each other. If the electric field at various points in the region of interest is known, it can be used to calculate the electric potential difference between any two points. Similarly, if the electric potential is known for various points, then it is possible to calculate the electric field.
In general, regardless of whether the electric field is uniform, it points in the direction of decreasing potential because the force on a positive...
4.5K
Finding Electric Potential From Electric Field01:13

Finding Electric Potential From Electric Field

4.2K
For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
4.2K
Node Analysis for AC Circuits01:14

Node Analysis for AC Circuits

350
Consider an angioplasty system featuring a catheter equipped with a turbine, a critical tool for removing plaque deposits from coronary arteries. This intricate medical device operates using a circuit model reminiscent of a dual-node RLC circuit powered by a current-controlled voltage source.
To unravel the complexities of this system, nodal analysis is employed, a powerful technique founded on Kirchhoff's current law (KCL), which remains valid for phasors. AC circuits can effectively be...
350
Electric Potential and Potential Difference01:16

Electric Potential and Potential Difference

4.6K
Suppose a positive test charge moves away from a positive static charge, then the Coulomb force does positive work, and its electric potential energy decreases. The potential energy per unit charge is defined as the electric potential. The electric potential is independent of the test charge.
When a test charge moves from the initial to the final position, the electric potential difference between those positions is defined as the ratio of the change in the potential energy to the charge on the...
4.6K
Mesh Analysis01:20

Mesh Analysis

721
Mesh analysis is a valuable method for simplifying circuit analysis using mesh currents as key circuit variables. Unlike nodal analysis, which focuses on determining unknown voltages, mesh analysis applies Kirchhoff's voltage law (KVL) to find unknown currents within a circuit. This method is particularly convenient in reducing the number of simultaneous equations that need to be solved.
A fundamental concept in mesh analysis is the definition of meshes and mesh currents. A mesh is a closed...
721
Electric Field of a Charged Disk01:23

Electric Field of a Charged Disk

2.2K
The simplest case of a surface charge distribution is the uniformly charged disk. Calculating its electric field also helps us calculate the electric field of a large plane of charge.
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
2.2K

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相关实验视频

Updated: Jul 19, 2025

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
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电动汽车充电站的网络安全风险分析

Safa Hamdare1, Omprakash Kaiwartya1, Mohammad Aljaidi2

  • 1Department of Computer Science, Nottingham Trent University, Nottingham NG11 8NS, UK.

Sensors (Basel, Switzerland)
|August 12, 2023
PubMed
概括

电动汽车充电系统 (EVCS) 面临着越来越多的网络安全风险,因为其采用率越来越高. 本研究分析了EVCS网络漏洞和威胁,为增强安全提供了见解.

关键词:
电动汽车充电 电动汽车充电网络安全 网络安全能源网络的能源网络.

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Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
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科学领域:

  • 电气工程 电气工程
  • 计算机科学 计算机科学
  • 网络安全 网络安全

背景情况:

  • 电动汽车 (EV) 的日益普及推动了对电动汽车充电系统 (EVCS) 的需求.
  • 公共和私人EVCS网络的不断扩张带来了重大的网络安全挑战.
  • 了解EVCS网络进步和收费用例对于风险评估至关重要.

研究的目的:

  • 对电动汽车充电系统 (EVCS) 网络进行全面的网络安全风险分析.
  • 识别和评估EVCS内部的基础设施和以协议为中心的漏洞.
  • 探索潜在的网络攻击场景,并使用实时数据验证威胁.

主要方法:

  • 审查EVCS网络技术的最新进展和EV适应趋势.
  • 分析网络安全方面,包括基础设施和协议漏洞.
  • 实时,以数据为中心,对电动汽车充电会话进行分析,以验证已识别的威胁.

主要成果:

  • 确定与不断增长的EVCS网络固有的关键网络安全风险.
  • 通过对充电会话的实证数据分析验证潜在的网络攻击载体.
  • 基础设施和以协议为中心的漏洞的特征.

结论:

  • 不断扩大的EVCS网络带来了重要的网络安全风险,需要进行彻底的分析.
  • 实时数据分析证实了在电动汽车充电过程中发现的威胁的有效性.
  • 电动汽车网络安全的开放研究问题被强调为未来的调查.