arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.11417math.OC
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三阶张量完备化的黎曼共轭梯度下降法

Riemannian Conjugate Gradient Descent Method for Third-Order Tensor Completion

Guang-Jing Song, Xue-Zhong Wang, Michael K. Ng

摘要:

张量补全的目标是在低秩约束下填充部分已知张量的缺失条目。本文主要研究了光滑流形上的低秩三阶张量完备化问题,并利用Riemannian最优化方法进行了研究。这里张量秩被定义为一组矩阵秩,其中矩阵是通过将傅立叶相关变换应用到原始张量的管上而获得的变换张量的切片。我们表明,适当的不相干条件下的底层低秩张量,建议的黎曼最优化方法是保证收敛,并找到这样的低秩张量具有很高的概率。此外,研究并推导了不同初始化方法下求解低秩张量完备化问题所需的样本项数目。合成和图像数据集的数值例子表明,所提出的方法是能够恢复低秩张量。

英文摘要:

The goal of tensor completion is to fill in missing entries of a partially known tensor under a low-rank constraint. In this paper, we mainly study low rank third-order tensor completion problems by using Riemannian optimization methods on the smooth manifold. Here the tensor rank is defined to be a set of matrix ranks where the matrices are the slices of the transformed tensor obtained by applying the Fourier-related transformation onto the tubes of the original tensor. We show that with suitable incoherence conditions on the underlying low rank tensor, the proposed Riemannian optimization method is guaranteed to converge and find such low rank tensor with a high probability. In addition, numbers of sample entries required for solving low rank tensor completion problem under different initialized methods are studied and derived. Numerical examples for both synthetic and image data sets are reported to demonstrate the proposed method is able to recover low rank tensors.

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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