DSP-TMM: A Robust Cluster Analysis Method Based on Diversity Self-Paced T-Mixture Model

• 作者: Limin Pan Senlin Luo Xiaonan Qin
• 来源期刊: 北京理工大学学报（英文版）
• 学科: 工学
• 年，卷（期）: 2020,（4）
• 页码范围: 531-543
• 页数: 13页
• 分类号: TP391
• 语种: 英文
• DOI: 10.15918/j.jbit1004-0579.20070

摘要

In order to implement the robust cluster analysis, solve the problem that the outliers in the data will have a serious disturbance to the probability density parameter estimation, and there-fore affect the accuracy of clustering, a robust cluster analysis method is proposed which is based on the diversity self-paced t-mixture model. This model firstly adopts the t-distribution as the sub-model which tail is easily controllable. On this basis, it utilizes the entropy penalty expectation con-ditional maximal algorithm as a pre-clustering step to estimate the initial parameters. After that, this model introduces l2,1-norm as a self-paced regularization term and developes a new ECM optim-ization algorithm, in order to select high confidence samples from each component in training. Fi-nally, experimental results on several real-world datasets in different noise environments show that the diversity self-paced t-mixture model outperforms the state-of-the-art clustering methods. It provides significant guidance for the construction of the robust mixture distribution model.