在工业控制系统中,合成时间序列生成采用了带有注意力机制的变频循环自编码器
1Department of Computer Engineering (Smart Security), Gachon University, Seongnam-si 1342, Republic of Korea.
Sensors (Basel, Switzerland)
|January 11, 2024
概括
合成数据生成解决了工业控制系统 (ICS) 中的数据稀缺问题. 一个基于注意力的可变循环自编码器 (AVRAE) 有效地生成时间序列ICS数据,捕获时间依赖性,用于改进的AI模型.
科学领域:
- 数据科学数据科学数据科学
- 人工智能的人工智能
- 网络物理系统 网络物理系统
背景情况:
- 数据稀缺是开发强大的人工智能和数据科学模型的主要挑战.
- 由于安全和隐私问题,工业控制系统 (ICS) 的数据通常无法获得,这限制了模型开发.
- ICS数据集具有复杂的时间序列特征,具有短期和长期的时间依赖.
研究的目的:
- 为工业控制系统 (ICS) 提出一种用于生成合成时间序列数据的新方法.
- 通过利用合成数据生成,应对ICS环境中数据稀缺的挑战.
- 为了有效地捕捉和建模ICS数据中固有的时间依赖关系.
主要方法:
- 开发了一种基于注意力的变异性循环自编码器 (AVRAE) 模型.
- 将变化推理的证据下限扩展到时间序列数据.
- 在基于循环神经网络的自编码器中集成了一个注意力机制,以学习时间依赖.
主要成果:
- 拟议的AVRAE模型成功生成了视觉和统计学上可信的合成ICS时间序列数据.
- 对HAI ICS数据集的全面评估表明了AVRAE的有效性.
- 注意力机制使短期和长期时间依赖的有效学习成为可能.
结论:
- AVRAE提供了一种可行的解决方案,用于生成高质量的合成ICS数据,减轻稀缺问题.
- 该方法增强了为ICS开发更准确的AI和数据科学模型的潜力.
- 这项工作为关键基础设施领域的时间序列数据生成提供了一种新的方法.
相关概念视频
01:23Linear time-invariant Systems
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A system is linear if it displays the characteristics of homogeneity and additivity, together termed the superposition property. This principle is fundamental in all linear systems. Linear time-invariant (LTI) systems include systems with linear elements and constant parameters.
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01:22Multi-input and Multi-variable systems
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01:11Sampling Continuous Time Signal
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In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
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01:31Classification of Systems-II
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Continuous-time systems have continuous input and output signals, with time measured continuously. These systems are generally defined by differential or algebraic equations. For instance, in an RC circuit, the relationship between input and output voltage is expressed through a differential equation derived from Ohm's law and the capacitor relation,
146
01:22Basic Continuous Time Signals
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Basic continuous-time signals include the unit step function, unit impulse function, and unit ramp function, collectively referred to as singularity functions. Singularity functions are characterized by discontinuities or discontinuous derivatives.
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01:27State Space Representation
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