使用完整周期一致的生成对抗网络进行异常检测
Zahra Dehghanian1, Saeed Saravani1, Maryam Amirmazlaghani1
1Department of Computer Engineering, Amirkabir University of Technology, Tehran, Iran.
International journal of neural systems
|November 30, 2024
概括
本研究引入了一种新的对抗方法,用于使用生成对抗神经网络 (GAN) 检测异常. 该方法通过优化培训和改进重建来提高检测准确性,优于现有的基准.
科学领域:
- 人工智能的人工智能
- 机器学习 机器学习
- 计算机视觉 计算机视觉
背景情况:
- 传统的异常检测方法在不同异常类型的准确性上存在很高的差异.
- 现有的技术在现实世界中通常是无效的,因为数据分布多样化.
研究的目的:
- 开发一种强大的对抗方法,用于使用生成对抗神经网络 (GAN) 检测异常.
- 提高检测精度,克服传统异常检测方法的局限性.
主要方法:
- 在重建错误中利用具有循环一致性的生成对抗神经网络 (GAN).
- 引入一个创新的信息流和一个新的区分器,以优化培训动态.
- 在输入空间中使用补充分布来引导重建向正常数据分布.
- 开发两种独特的异常评分机制,用于增强检测能力.
主要成果:
- 与一类异常检测基准相比,拟议的模型表现出优越的性能.
- 对六个不同数据集的全面评估证实了该模型的有效性.
- 该方法成功地隔离了异常实例,并提高了检测精度.
结论:
- 开发的对抗方法为现实世界的异常检测提供了强大的解决方案.
- 创新的培训程序和评分机制显著提高了检测能力.
- 开源实现促进了进一步的研究和应用在学术界.
相关概念视频
Correlation between ECG and Cardiac Cycle
3.4K
The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
3.4K
Normal and Tangetial Components: Problem Solving
175
Consider a man with a mass of 70 kg seated in a chair connected to a pin support through a member BC. If the man maintains an upright position, the task is to determine the horizontal and vertical reactions of the chair on the man when the member makes a 45° angle with the horizontal. At this moment, the man has a speed of 5 m/s, increasing at a rate of 1 m/s².
175
Propagation of Uncertainty from Systematic Error
482
The atomic mass of an element varies due to the relative ratio of its isotopes. A sample's relative proportion of oxygen isotopes influences its average atomic mass. For instance, if we were to measure the atomic mass of oxygen from a sample, the mass would be a weighted average of the isotopic masses of oxygen in that sample. Since a single sample is not likely to perfectly reflect the true atomic mass of oxygen for all the molecules of oxygen on Earth, the mass we obtain from this...
482
Difference from Background: Limit of Detection
5.9K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
5.9K
Propagation of Uncertainty from Random Error
652
An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
652
Detection of Gross Error: The Q Test
5.6K
When one or more data points appear far from the rest of the data, there is a need to determine whether they are outliers and whether they should be eliminated from the data set to ensure an accurate representation of the measured value. In many cases, outliers arise from gross errors (or human errors) and do not accurately reflect the underlying phenomenon. In some cases, however, these apparent outliers reflect true phenomenological differences. In these cases, we can use statistical methods...
5.6K


