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相关概念视频

Acid Attack on Concrete01:21

Acid Attack on Concrete

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When acids come into contact with concrete, they initiate a chemical reaction that dissolves the hydrated cement paste. This process leads to softening and structural weakening of the concrete. This issue is commonly observed in environments such as chimneys, sewers, and industrial settings. The severity of the damage increases as the pH of the water interacting with the concrete drops below 6.5. In particular, a pH under 4.5 can cause significant concrete damage.
The rate at which hydrogen...
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Sulfate Attack on Concrete01:29

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Sulfate attack on concrete is a deterioration process characterized by a whitish discoloration beginning at the edges and corners, accompanied by cracking and spalling. This phenomenon occurs when sulfates react with the components of hardened concrete, forming compounds like calcium sulfate and calcium sulfoaluminate which occupy more space than the substances they replace, causing the concrete to expand and disrupt.
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Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
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An alternator converts mechanical energy into electrical energy that varies sinusoidally, resulting in AC current. Meanwhile, a DC generator converts mechanical energy into electrical energy, which are DC pulses with the same polarity. The construction of a DC generator is similar to that of an alternator, except that the pair of slip rings is replaced by a single split ring, also called a commutator. The commutator functions like a periodic rotary switch; it changes the contacts with the...
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The evaluation stage signals the end of the nursing process. The nurse gathers evaluative data to assess whether or not the patient has attained the expected results. Whereas the nurse collects data in the nursing assessment to identify the patient's health concerns, the evaluation stage data determines if the indicated health issues are resolved. Evaluative data collection includes two sections: the data acquired to evaluate patient outcomes and the time criteria for data collection.
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相关实验视频

Updated: Jan 25, 2026

Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder
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Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder

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通过PPO和GAN生成的对抗性攻击来评估步行系统漏洞.

El Mehdi Saoudi1, Jaafar Jaafari2, Said Jai Andaloussi2

  • 1Laboratory of Data Engineering and Intelligent Systems, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, 20000, Morocco. elmehdi.saoudi@univh2c.ma.

Scientific reports
|January 23, 2026
PubMed
概括
此摘要是机器生成的。

深度学习步态识别易受敌对攻击. 使用生成对抗网络 (GAN) 和近距离政策优化 (PPO) 的新方法创建可欺骗系统的补丁,降低准确性并突出安全风险.

关键词:
敌对的机器学习生物识别系统分析深度学习的漏洞 深度学习的漏洞步态分析 技术 技术强化学习安全 强化学习安全

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相关实验视频

Last Updated: Jan 25, 2026

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科学领域:

  • 计算机科学 计算机科学
  • 人工智能的人工智能
  • 生物识别信息 生物识别信息

背景情况:

  • 深度学习模型越来越多地用于安全的步态识别.
  • 这些系统容易受到敌对攻击,损害了可靠性.
  • 步行识别对于要求准确性的高安全性应用程序至关重要.

研究的目的:

  • 调查深度学习步态识别系统中的漏洞.
  • 开发和部署使用生成对抗网络 (GAN) 和近接政策优化 (PPO) 的对抗性攻击.
  • 评估这些攻击对系统准确性和可靠性的影响.

主要方法:

  • 将近距离政策优化 (PPO) 与生成对抗网络 (GAN) 的整合.
  • 创建有针对性的对抗补丁,旨在欺骗步态识别算法.
  • 对CASIA行走数据库的攻击部署:数据集B和OU-ISIR跑步机数据集B.
  • 通过测量识别精度下降来评估攻击有效性.

主要成果:

  • 敌对补丁有效地欺骗了步态识别算法.
  • 袭击后观察到识别准确度的显著下降.
  • 攻击仍然没有被人类监督所发现.

结论:

  • 深度学习步态识别系统出现了关键的安全漏洞.
  • 开发的方法有效地证明了系统的漏洞.
  • 这些发现有助于开发更强大,更安全的生物识别系统来应对网络威胁.