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复杂系统中的异常状态,可能难以通过机理建模、统计过程控制或频域分析等方法直接识别。从多通道传感器采集的海量时间序列数据中挖掘关键特征信息,识别潜在异常模式,首选的方案一般是有监督的机器学习算法,根据含标签的数据集,构建分类学习模型区分系统中的正常和异常行为。但是,如果异常数据和正常数据的样本量不均衡,甚至没有先验的标签时,则需要考虑使用无监督或半监督的异常检测方法。
本演讲将结合具体示例,介绍在MATLAB®中如何实现面向时间序列的异常检测方法。
出版年份: 2023 年 7 月 9 日
使用 MATLAB 衔接无线通信设计与测试
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