arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1701.01037stat.MEstat.ML
收藏

张量-张量回归

Tensor-on-tensor regression

Eric F. Lock

摘要:

我们提出了一个多路阵列的线性预测框架(即,张量)从任意维度的另一个多路阵列中提取。该框架概括了几种现有的方法,包括从张量预测标量结果的方法,从矩阵预测矩阵的方法,或从标量预测张量的方法。我们描述了一种方法,利用多路结构的预测和结果限制系数有降低CP秩。本文提出了一种通用而有效的惩罚最小二乘估计算法,该算法允许对系数进行岭(L_2)惩罚。其目的是给出贝叶斯后验模型,从而激发吉布斯抽样算法进行推理。我们说明了面部图像数据的应用程序的方法。R包可在https://github.com/lockEF/MultiwayRegression上获得。

英文摘要:

We propose a framework for the linear prediction of a multi-way array (i.e., a tensor) from another multi-way array of arbitrary dimension, using the contracted tensor product. This framework generalizes several existing approaches, including methods to predict a scalar outcome from a tensor, a matrix from a matrix, or a tensor from a scalar. We describe an approach that exploits the multiway structure of both the predictors and the outcomes by restricting the coefficients to have reduced CP-rank. We propose a general and efficient algorithm for penalized least-squares estimation, which allows for a ridge (L_2) penalty on the coefficients. The objective is shown to give the mode of a Bayesian posterior, which motivates a Gibbs sampling algorithm for inference. We illustrate the approach with an application to facial image data. An R package is available at https://github.com/lockEF/MultiwayRegression .

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。

↑