嵌套删失数据期望最大化的高斯混合聚类算法

余海燕; 陈京京; 邱航; 王永; 王若凡

doi:10.16383/j.aas.c190081

嵌套删失数据期望最大化的高斯混合聚类算法

doi: 10.16383/j.aas.c190081

余海燕^{1, 2,},
陈京京^1,,
邱航^{2, 3,},
王永^1,,
王若凡^4,

1.
重庆邮电大学电子商务与现代物流重庆市重点实验室重庆 404615
2.
电子科技大学计算机科学与工程学院成都 611731
3.
电子科技大学大数据研究中心成都 611731
4.
天津职业技术师范大学信息技术工程学院天津 300222

基金项目: 国家自然科学基金(71601026, 61601331, 71571105), 重庆市产业类重大主题专项(cstc2017zdcy-zdzxX0013), 四川省重点研发项目(2018SZ0114, 2019YFS0271), 天津市自然科学基金青年项目(18JCQNJC04700)资助

详细信息

作者简介:
余海燕：重庆邮电大学副教授. 美国宾西法尼亚州立大学博士后访问学者. 2015年获得天津大学博士学位. 主要研究方向为统计机器学习, 因果推断. 本文通信作者.E-mail: yuhy@cqupt.edu.cn

陈京京：重庆邮电大学经济管理学院硕士研究生. 主要研究方向为聚类算法和数据缺失机制.E-mail: chenjingjing_361@163.com

邱航：电子科技大学计算机科学与工程学院副教授. 2011年获得电子科技大学计算机应用技术博士学位. 2013 ~ 2014年英国诺丁汉大学访问学者. 主要研究方向为机器学习和计算机图形学.E-mail: qiuhang@uestc.edu.cn

王永：重庆邮电大学管理工程系教授. 2007年于重庆大学获得计算机科学与技术专业博士学位. 主要研究方向为数据分析和信息安全.E-mail: wangyong_cqupt@163.com

王若凡：天津职业技术师范大学讲师. 2015年获得天津大学博士学位. 2018 ~ 2019年美国宾夕法尼亚州立大学访问学者. 主要研究方向为神经影像数据分析, 机器学习.E-mail: wangrf@tju.edu.cn

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出版历程
- 收稿日期: 2019-02-11
- 录用日期: 2019-07-30
- 网络出版日期: 2021-06-10
- 刊出日期: 2021-06-10

Adapted Expectation Maximization Algorithm for Gaussian Mixture Clustering With Censored Data

YU Hai-Yan^{1, 2
,},
CHEN Jing-Jing^1
,,
QIU Hang^{2, 3
,},
WANG Yong^1
,,
WANG Ruo-Fan^4
,

1.
Chongqing Key Laboratory of Electronic Commerce and Modern Logistics, Chongqing University of Posts and Telecomms., Chongqing 404615
2.
School of Computer Science and Engineering, University of Electronic Science and Technology, Chengdu 611731
3.
Big Data Research Center, University of Electronic Science and Technology, Chengdu 611731
4.
School of Information Technology Engineering, Tianjin University of Technology and Education, Tianjin 300222

Funds: Supported by National Natural Science Foundation of China (71601026, 61601331, 71571105), Chongqing Science and Technology Commission (cstc2017zdcy-zdzxX0013), Key Research and Development Program of Sichuan Province (2018SZ0114, 2019YFS0271), and Tianjin Natural Science Foundation Youth Project(18JCQNJC04700)

More Information

Author Bio:
YU Hai-Yan　Associate professor at Chongqing University of Posts and Telecommunications (CQUPT). Postdoctoral visiting scholar at The Pennsylvania State University. He received his Ph.D. degree from Tianjin University in 2015. His research interest covers statistical machine learning, causal inference. Corresponding author of this paper

CHEN Jing-Jing　Master student at the School of Economics and Management, Chongqing University of Posts and Telecommunications. Her main research interest covers clustering algorithm and data missing mechanism

QIU Hang　Associate professor at the School of Computer Science and Engineering, University of Electronic Science and Technology of China (UESTC). He received his Ph. D. degree in computer application technology from UESTC in 2011. From 2013 to 2014, he was a visiting researcher at University of Nottingham, UK. His research interest covers machine learning and computer graphics

WANG Yong　Professor in the Department of Management Engineering, Chongqing University of Posts and Telecommunications. He received his Ph. D. degree in computer science and technology, from Chongqing University, in 2007. His research interest covers data analysis and information security

WANG Ruo-Fan　Lecturer at the School of Information Technology Engineering, Tianjin University of Technology and Education. She received her Ph. D. degree from Tianjin University in 2015. From 2018 to 2019, she was a visiting scholar in the Department of Biomedical Engineering, The Pennsylvania State University. Her research interest covers analysis of neuroimaging data and machine learning

摘要

摘要: 针对聚类问题中的非随机性缺失数据, 本文基于高斯混合聚类模型, 分析了删失型数据期望最大化算法的有效性, 并揭示了删失数据似然函数对模型算法的作用机制. 从赤池弘次信息准则、信息散度等指标, 比较了所提出方法与标准的期望最大化算法的优劣性. 通过删失数据划分及指示变量, 推导了聚类模型参数后验概率及似然函数, 调整了参数截尾正态函数的一阶和二阶估计量. 并根据估计算法的有效性理论, 通过关于得分向量期望的方程得出算法估计的最优参数. 对于同一删失数据集, 所提出的聚类算法对数据聚类中心估计更精准. 实验结果证实了所提出算法在高斯混合聚类的性能上优于标准的随机性缺失数据期望最大化算法.
- 高斯混合聚类 /
- 删失数据 /
- 期望最大化算法 /
- 截尾正态函数 /
- 二阶估计量
Abstract: To provide a solution for clustering with data of missing not at random, this paper provided the efficiency analysis on the adapted expectation-maximization (EM) algorithm for Gaussian mixture clustering model with censored data. We also revealed the impact mechanism of the likelihood function of censored data on the clustering model and its estimation algorithm. With Akaike´s information criterion and Kullback-Leibler divergence, the performance of the proposed algorithm was compared with the standard EM algorithm. Based on data partition and the indicating variables of the censored data set, the paper proposed derived the posterior and likelihood function of the parameters, and adjusted its first and second moments of the truncated normal functions. According to the principles of efficient influence function, the optimal parameters of the algorithm are obtained by the equation of the expectation of the score vector. For the censored data, the proposed clustering algorithm is more accurate in estimating its centroids. The experimental results demonstrated that the proposed algorithm in Gaussian mixture clustering outperformed the standard EM algorithm, which was designed for the data of missing at random.
- Gaussian mixture clustering /
- censored data /
- expectation-maximization /
- truncated normal function /
- second order moment

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图 1 在数据集DS-a右删失上的两种算法比较

Fig. 1 Comparison of the two algorithms on the dataset DS-a with right censoring

下载: 全尺寸图片幻灯片

图 2 在数据集DS-a双边删失上的两种算法比较

Fig. 2 Comparison of the two algorithms on the dataset DS-a with double-side censoring

下载: 全尺寸图片幻灯片

图 3 在数据集DS-b左删失上的两种算法比较

Fig. 3 Comparison of the two algorithms on the dataset DS-b with left censoring

下载: 全尺寸图片幻灯片

图 4 在数据集DS-b双边删失上的两种算法比较

Fig. 4 Comparison of the two algorithms on the dataset DS-b with double-side censoring

下载: 全尺寸图片幻灯片

图 5 在血糖测试数据右删失上两种算法比较

Fig. 5 Comparison of the two algorithms on the dataset of blood sugar tests with right-side censoring

下载: 全尺寸图片幻灯片

表 1 实验合成数据集真实分布和估计分布之间的KLD值

Table 1 Kullback-Leibler divergence (KLD) between the true densities and the estimated densities of the synthetic data set

数据集	观测值 (删失)	EMGM	cenEMGM
DS-a 右删失	0.072 ± 0.011	0.261 ± 0.016	0.051 ± 0.003
DS-a 双边删失	0.226 ± 0.017	10.602 ± 1.966	0.028 ± 0.009
DS-b 左删失	4.362 ± 0.393	32.263 ± 4.193	22.583 ± 3.392
DS-b 双边删失	4.219 ± 0.381	30.321 ± 4.128	29.655 ± 3.938

下载: 导出CSV

表 2 实验合成数据集参数估计的两种算法AIC比较

Table 2 AIC comparison of the two estimation algorithms on the synthetic data set

数据集	EMGM	cenEMGM
DS-a 右删失	12852 ± 594	12349 ± 481
DS-a 双边删失	12782 ± 436	12323 ± 417
DS-b 左删失	9435 ± 317	8815 ± 305
DS-b 双边删失	8759 ± 293	7152 ± 264

下载: 导出CSV

表 3 真实数据及其拓展数据的两种算法比较

Table 3 Comparison of the two algorithms with the real data and its extended data

		EMGM 算法	cenEMGM 算法
右边删失率 8.51 %	聚类中心	(4.50, 7.22)	(4.53, 7.54)
	聚类中心	(4.94, 9.55)	(6.01, 10.51)
	KLD	12.7	9.1
	AIC	4366	4263
右边删失率 11.67 %	聚类中心	(4.50, 7.20)	(4.53, 7.54)
	聚类中心	(4.81, 9.70)	(6.08, 9.85)
	KLD	11.35	9.08
	AIC	4 290	4 209
双边删失率 15.05 %: 右边删失 8.51 %, 左边删失 6.54 %	聚类中心	(5.10, 7.43)	(5.10, 7.48)
	聚类中心	(5.48, 8.56)	(5.48, 8.94)
	KLD	173.7	158.6
	AIC	2226	−24327

下载: 导出CSV

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