图形TS:用于后续异常检测的图形表示的时间序列
Roozbeh Zarei1, Guangyan Huang1, Junfeng Wu1
1School of Information Technology, Deakin University, Melbourne, Victoria, Australia.
PloS one
|August 16, 2023
概括
这项研究引入了GraphTS,这是一种用于检测时间序列数据中的后续异常的新方法. GraphTS有效地识别了任何长度的罕见和反复出现的异常,而不需要事先知道它们的数量或持续时间.
科学领域:
- 数据科学数据科学数据科学
- 机器学习 机器学习
- 时间序列分析时间序列分析
背景情况:
- 在时间序列中检测后续异常在许多领域都至关重要.
- 现有的方法通常需要知道异常的长度和数量,并与反复出现的异常作斗争.
- 由于依赖本地信息,目前的方法可能无法捕捉反复出现的后续异常.
研究的目的:
- 为后续异常发现提出一种新的图形表示时间序列 (GraphTS) 方法.
- 解决现有方法的局限性,包括需要先前了解异常特征.
- 为了有效地捕捉任意长度的反复和罕见后续异常.
主要方法:
- 引入了一个新的时间序列图表表示模型 (GraphTS).
- 开发了一种2D时间序列可视化 (2Dviz) 方法,将1D模式映射到2D时空空间中.
- 从二维表示构建了一个图形,以识别反复和罕见的后续异常.
主要成果:
- 该 GraphTS 方法成功地代表了反复和罕见的时间序列模式.
- 2Dviz技术增强了对后续异常的识别能力.
- 实验结果表明,GraphTS在准确性和效率方面超过了最先进的方法.
结论:
- 拟议的GraphTS方法提供了一种有效的方法,用于发现单一和反复的后续异常.
- GraphTS克服了现有方法的局限性,因为它不需要事先了解异常长度或数量.
- 与当前最先进的技术相比,该方法显示出更高的性能.
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