2019-2区-Unsupervised Anomaly Detection Minimum Spanning Tree Hydropower

标题

Unsupervised Anomaly Detection Based on Minimum Spanning Tree Approximated Distance Measures and Its Application to Hydropower Turbines(官方源地址)(原文地址

期刊

IEEE Transactions on Automation Science and Engineering(2区)

文章的思路

方法

  1. 使用高维数据(222维,p11左栏第1段)构造图数据结构
  2. 使用LoMST方法进行分析(详见算法1 Algorithm 1)
  3. 用决策树(decision tree)对聚类结果进行分析,相当于把非监督问题转化成了监督问题,使得结果具有一定的可解释性(p12右栏第1、2段)

目标

提出的方法可以有效地识别异常,可以辅助工作人员寻找异常

理解论文的关键点

  1. p5右栏倒数第2段:解释了为什么归一化处理之前还要进行特殊处理,对应于Algorithm 1 stage 2的第8步
  2. p6左栏倒数第1段:解释了如何基于观察来选择k

关键细节

  1. 222 attribute variables(p11左栏第1段)使用了222个点,使用的点很多,但是没说具体是哪些点,也没分析为什么用这些点
  2. 10-min intervals(p11左栏第1段)10分钟的采样间隔

值得学习的参考文献

2018-Outlier detection for hydropower generation plant(是本文的雏形,暂时不用看)

值得学习的施引文献

  1. 2019-会议–O-LoMST: An Online Anomaly Detection Approach And Its Application In A Hydropower Generation Plant
  2. 2019-3区-Hydroelectric Generating Unit Fault Diagnosis Using 1-D Convolutional Neural Network and Gated Recurrent Unit in Small Hydro(常年3区,但是有提升到2区的趋势)
  3. 2020-3区-Anomaly detection for condition monitoring data using auxiliary feature vector and density-based clustering(稳稳的3区,有时间再看)

值得引用的地方

unsupervised detection methods tend to have a lower detection capability and higher false alarm rate, as compared to general supervised learning algorithms. As a result, unsupervised detection methods are typically used as a screening tool, flagging potential anomalies to be further analyzed by either a human operator or some more expensive procedure.(p6左栏第1段)

完美的托词。非监督检测的检测能力不强,所以一般起辅助作用。

值得学习的地方

为了便于审稿人/读者理解,算法最好列表明示,另外流程图也是很棒的表达方式。

存在的问题

。。。

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转载自blog.csdn.net/shiyuzuxiaqianli/article/details/113888318