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Masking and Demasking Agents01:19

Masking and Demasking Agents

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EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
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Stereotype Content Model02:16

Stereotype Content Model

14.0K
The Stereotype Content Model (SCM) was first proposed by Susan Fiske and her colleagues (Fiske, Cuddy, Glick & Xu, 2002; see also Fiske, 2012 and Fiske, 2017). The SCM specifies that when someone encounters a new group, they will stereotype them based on two metrics: warmth—or that group’s perceived intent, and how likely they are to provide help or inflict harm—and competence—or their ability to carry out that objective. Depending on the warmth-competence...
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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
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在DoS攻击下的多代理系统的安全共识控制:基于切换方案的主动防御方法.

Dong-Yu Zhang, Xiao-Jian Li

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    此摘要是机器生成的。

    这项研究提出了在多代理系统 (MAS) 中对拒绝服务 (DoS) 攻击的积极防御. 拟议的方法通过自适应地切换通信拓来确保安全的共识控制,即使在DoS攻击下.

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    相关实验视频

    Last Updated: Jun 11, 2025

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    科学领域:

    • 控制理论 控制理论
    • 网络化系统 网络化系统
    • 网络安全 网络安全

    背景情况:

    • 多代理系统 (MAS) 在拒绝服务 (DoS) 攻击下保持共识方面面临挑战.
    • 现有的防御机制往往在攻击的持续时间和频率方面存在局限性.

    研究的目的:

    • 在DoS攻击下,为MAS开发一个安全的共识控制策略,具有非零输入的领导者.
    • 提出一种积极的防御方法,确保领导者与追随者之间达成一致,尽管通信中断.

    主要方法:

    • 引入备份拓,用于对DoS攻击进行主动防御.
    • 一种新的主动防御方法,包括状态观察员,自适应拓切换和切换控制器.
    • 使用预定义的性能指数和监控功能来选择健康的沟通图表.
    • 使用线性矩阵不等式来导出普遍的观察者和控制器参数.

    主要成果:

    • 拟议的防御方案有效地确保了在DoS攻击下领导者-追随者结合的共识.
    • 该方法消除了对DoS攻击的持续时间和频率的限制.
    • 在DoS攻击之前和之后,共识错误限制保持一致.

    结论:

    • 开发的防御方案为MAS的安全共识控制提供了一个强大的解决方案.
    • 与现有方法相比,这种方法显示出更高的性能和效率.
    • 模拟示例验证了拟议的理论结果的有效性.