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相关概念视频

SBAR I: Understanding the Concept01:29

SBAR I: Understanding the Concept

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Effective communication among healthcare professionals during hand-off reporting is essential to delivering safe and continuous patient care. Common professional interactions include reports to healthcare team members, hand-off, and transfer reports. Nurses routinely report information to other healthcare team members and also urgently contact healthcare providers to report changes in patient status.
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Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
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Comparison between RL and RC circuits01:24

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An RC circuit consists of resistance and capacitance, while in an RL circuit, capacitance is replaced by an inductor. RL and RC circuits are first-order differential circuits that store energy. An RC circuit stores energy in the electric field, while an RL circuit stores energy in the magnetic field. When connected to a battery, an RC circuit charges the capacitor, causing the current to decrease from maximum to zero upon being fully charged. This increases the voltage across the capacitor from...
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A relaxation oscillator is one of the applications of RC circuits. A neon lamp relaxation oscillator comprises a capacitor, a resistor, a voltage source, and a lamp. The lamp acts like an open circuit, with infinite resistance until the potential difference across the lamp reaches a specific voltage. At that voltage, the lamp acts like a short circuit with zero resistance, and the capacitor discharges through the lamp, thus producing light. Once the capacitor is fully discharged through the...
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Line Protection with Impedance Relays01:27

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Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
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Issues And Trends In Healthcare Delivery System01:29

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The issues and trends in healthcare delivery are constantly changing. The COVID-19 pandemic is one recent issue that wreaked havoc on healthcare systems, causing a shortage of healthcare workers, high demand for medicines and supplies, and increased medical expenditure due to a lack of insurance. Other issues include rising healthcare costs and care fragmentation.
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相关实验视频

Updated: Jun 11, 2025

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
06:04

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用RBAC物联网协议增强通信安全的架构基于物联网协议的微电网.

SooHyun Shin1, MyungJoo Park1, TaeWan Kim2

  • 1Department of Computer Science and Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea.

Sensors (Basel, Switzerland)
|September 28, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了微电网中的数据分发服务 (DDS) 协议的基于角色的访问控制 (RBAC) 安全方法. 这提高了电力系统中物联网 (IoT) 设备的网络安全和网络弹性.

关键词:
基于属性的访问控制.数据分发服务数据分发服务.物联网的东西互联网.微电网是一个微电网.基于角色的访问控制.安全的安全的安全的安全的安全.

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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:

  • 传统的电网由于单向的能量流而遭受效率低下.
  • 微电网通过双向流量和独立的电源提供更高的效率.
  • 微电网中的物联网 (IoT) 协议引入了重要的网络安全漏洞.

研究的目的:

  • 解决微电网通信系统中的安全漏洞.
  • 提高微电网运营的网络弹性.
  • 为支持物联网的微电网提出一种新的安全方法.

主要方法:

  • 实现基于角色的访问控制 (RBAC) 安全模型.
  • 将RBAC与数据分发服务 (DDS) 协议集成.
  • 使用可扩展访问控制标记语言 (XACML) 来执行政策.
  • 角色分配和许可授予微电网内的用户和设备.

主要成果:

  • 减少物联网设备之间的通信中的安全漏洞.
  • 加强对入侵威胁的网络弹性.
  • 展示了政策决策和执行的功能性实施模型.

结论:

  • 提出的基于RBAC的安全方法有效地减轻了微电网通信中的风险.
  • 这种方法加强了微电网系统的整体网络安全态度.
  • 该方法有助于未来电网的稳定和高效运行.