期刊
JOURNAL OF MACHINE LEARNING RESEARCH
卷 22, 期 -, 页码 -出版社
MICROTOME PUBL
关键词
minimum spanning tree; non-negative matrix factorization; unsupervised anomaly detection
资金
- NSF [IIS-1750074, IIS-1718840, CMMI-1545038, IIS-1849085]
- ABB [M1801386]
Dimensionality reduction is crucial for competitive performance in unsupervised learning, and Non-negative matrix factorization (NMF) is widely used for this purpose. However, in the presence of nonlinear manifold structure, NMF may not perform well. To address this, a neighborhood structure-assisted NMF method is proposed, showing superior performance through empirical comparisons and property analysis.
Dimensionality reduction is considered as an important step for ensuring competitive performance in unsupervised learning such as anomaly detection. Non-negative matrix factorization (NMF) is a widely used method to accomplish this goal. But NMF do not have the provision to include the neighborhood structure information and, as a result, may fail to provide satisfactory performance in presence of nonlinear manifold structure. To address this shortcoming, we propose to consider the neighborhood structural similarity information within the NMF framework and do so by modeling the data through a minimum spanning tree. We label the resulting method as the neighborhood structure-assisted NMF. We further develop both offline and online algorithms for implementing the proposed method. Empirical comparisons using twenty benchmark data sets as well as an industrial data set extracted from a hydropower plant demonstrate the superiority of the neighborhood structure-assisted NMF. Looking closer into the formulation and properties of the proposed NMF method and comparing it with several NMF variants reveal that inclusion of the MST-based neighborhood structure plays a key role in attaining the enhanced performance in anomaly detection.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据