High dimensional Model Based Clustering with non-Gaussian Distributions

基于非高斯分布的高维模型聚类

• 批准号: RGPIN-2018-04444
• 负责人: Browne, Ryan
• 金额: $ 1.46万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=677174
• 关键词: dimensional; Model; Based; Clustering; non

The proposal research has two primary objectives; construct an efficient and consistent estimation procedure for non-normal distributions***such as the Kotz distribution, and develop a framework for Intrinsic Dimension Modelling using model-based clustering. In model-based clustering assumes the heterogeneous data was generated by a finite mixture model. The Kotz distribution has been proposed for model both leptokurtic and platykurtic data. The Kotz distribution contains the power exponential distribution and the multivariate normal as special cases. We propose to investigate the performance of the Kotz distribution and the generalized Kotz distribution in model-based clustering. One challenge is that there is no current parameter estimation procedure for the Kotz distribution. ******In clustering, an intrinsic dimension captures the essence or effectively the variation within cluster and is typically a low-dimensional space. Many model-based clustering methods assume some form of an intrinsic dimension. The complement (extrinsic or noise) dimension contains the remaining variation and is essentially noise. We propose a framework where the densities of the intrinsic and noise dimensions vary. *****

该提案的研究有两个主要目标：为非正态分布 *（如Kotz分布）构建一个有效且一致的估计程序，并使用基于模型的聚类开发一个内在维度建模框架。在基于模型的聚类中，假设异构数据是由有限混合模型生成的。Kotz分布已被提出用于对尖峰和平峰数据进行建模。Kotz分布包含幂指数分布和多元正态分布作为特例。我们建议研究的Kotz分布和广义Kotz分布在基于模型的聚类的性能。一个挑战是，目前还没有Kotz分布的参数估计程序。 ** 在聚类中，内在维度捕获了聚类中的本质或有效的变化，通常是一个低维空间。许多基于模型的聚类方法假设某种形式的内在维度。互补（非本征或噪声）维度包含剩余的变化，本质上是噪声。我们提出了一个框架，其中的固有和噪声尺寸的密度不同。*****