Factor Modeling for Clustering High-Dimensional Time Series
用于高维时间序列聚类的因子建模AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接以潜在共同因子和簇特定因子建模并聚类高维时间序列。
用于高维时间序列聚类的因子建模AI 解读 ↓
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We propose a new unsupervised learning method for clustering a large number of time series based on a latent factor structure.Each cluster is characterized by its own cluster-specific factors in addition to some common factors which impact on all the time series concerned.Our setting also offers the flexibility that some time series may not belong to any clusters.The consistency with explicit convergence rates is established for the estimation of the common factors, the cluster-specific factors, and the latent clusters.Numerical illustration with both simulated data as well as a real data example is also reported.As a spin-off, the proposed new approach also advances significantly the statistical inference for the factor model of Lam and Yao.Supplementary materials for this article are available online.