提出一种新模型,更好检测数据异常。
One Class Restricted Kernel Machines
- 用类RBM能量函数融合可见与隐藏变量,非概率建模。
- 在UCI数据集上,对异常值的检测准确率显著优于基线模型。
- 适合需要高鲁棒性的一类分类任务,如工业故障检测。
受限核机器(RKMs)在提升机器学习泛化能力方面表现突出。近期研究将核函数与最小二乘支持向量机(LSSVM)结合,借鉴受限玻尔兹曼机(RBM)的能量函数形式,取得更优性能。然而,数据中的异常值和其他污染会削弱RKM效果,导致学习偏差和结果不可靠。为解决此问题并增强模型鲁棒性,本文提出一类新型受限核机器(OCRKM)。OCRKM采用类似RBM的能量函数,将可见变量与隐藏变量整合于非概率框架中,使一分类方法与RKM无缝衔接,显著提升异常检测能力。在多个UCI基准数据集上的实验表明,无论何种场景,所提模型均展现出优于基线模型的泛化性能,统计分析也一致支持其优越性。
原文摘要 · Abstract (English)
Restricted kernel machines (RKMs) have demonstrated a significant impact in enhancing generalization ability in the field of machine learning. Recent studies have introduced various methods within the RKM framework, combining kernel functions with the least squares support vector machine (LSSVM) in a manner similar to the energy function of restricted boltzmann machines (RBM), such that a better performance can be achieved. However, RKM's efficacy can be compromised by the presence of outliers and other forms of contamination within the dataset. These anomalies can skew the learning process, leading to less accurate and reliable outcomes. To address this critical issue and to ensure the robustness of the model, we propose the novel one-class RKM (OCRKM). In the framework of OCRKM, we employ an energy function akin to that of the RBM, which integrates both visible and hidden variables in a nonprobabilistic setting. The formulation of the proposed OCRKM facilitates the seamless integration of one-class classification method with the RKM, enhancing its capability to detect outliers and anomalies effectively. The proposed OCRKM model is evaluated over UCI benchmark datasets. Experimental findings and statistical analyses consistently emphasize the superior generalization capabilities of the proposed OCRKM model over baseline models across all scenarios.
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