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arXiv 1202.2476stat.ML
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正则化张量因子分解和高阶主成分分析

Regularized Tensor Factorizations and Higher-Order Principal Components Analysis

Genevera I. Allen

摘要:

高维张量或多维数据在生物医学成像、化学计量学、网络和文献计量学等领域变得越来越普遍。寻找张量数据的低维表示的传统方法包括将数据平坦化并应用矩阵分解,例如主成分分析(PCA)或采用张量分解,例如CANDECOMP / PARAFAC(CP)和Tucker分解。前者可能会丢失数据中的重要结构,而后者的高阶PCA(HOPCA)方法在具有许多不相关特征的高维中可能存在问题。我们引入框架稀疏张量因子分解或稀疏HOPCA的启发式算法的方法的基础上,并通过解决相关的CP分解的惩罚优化问题。这些方法的扩展导致一般正则化张量因子分解,多路功能HOPCA和结构化数据的HOPCA的推广方法。我们说明了我们的方法的效用降维,特征选择,和信号恢复模拟数据和多维微阵列和功能MRI。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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