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• W2108125792 abstract "High-dimensional tensors or multi-way data are becoming prevalent in areas such as biomedical imaging, chemometrics, networking and bibliometrics. Traditional approaches to finding lower dimensional representations of tensor data include flattening the data and applying matrix factorizations such as principal components analysis (PCA) or employing tensor decompositions such as the CANDECOMP / PARAFAC (CP) and Tucker decompositions. The former can lose important structure in the data, while the latter Higher-Order PCA (HOPCA) methods can be problematic in high-dimensions with many irrelevant features. We introduce frameworks for sparse tensor factorizations or Sparse HOPCA based on heuristic algorithmic approaches and by solving penalized optimization problems related to the CP decomposition. Extensions of these approaches lead to methods for general regularized tensor factorizations, multi-way Functional HOPCA and generalizations of HOPCA for structured data. We illustrate the utility of our methods for dimension reduction, feature selection, and signal recovery on simulated data and multi-dimensional microarrays and functional MRIs." @default.
• W2108125792 created "2016-06-24" @default.
• W2108125792 creator A5048412925 @default.
• W2108125792 date "2012-02-11" @default.
• W2108125792 modified "2023-09-27" @default.
• W2108125792 title "Regularized Tensor Factorizations and Higher-Order Principal Components Analysis" @default.
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• W2108125792 hasPublicationYear "2012" @default.
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