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arXiv 1808.00616cs.LGstat.ML
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混合矩阵完成

Mixture Matrix Completion

Georgia State University(佐治亚州立大学)

Daniel L. Pimentel-Alarcón

摘要:

完成数据矩阵X已成为现代数据科学中普遍存在的问题,其应用于推荐系统、计算机视觉和网络推理等。一个典型的假设是X是低秩的。一个更一般的模型假设X的每一列对应于几个低秩矩阵之一。本文将这些模型推广到我们称之为混合矩阵完备(MMC)的情况下,X的每个条目对应于几个低秩矩阵之一。MMC是一个更准确的推荐系统模型,并带来了更多的灵活性,以其他完成和聚类问题。我们对这一新模式做出了四个基本贡献。首先,我们证明了MMC在理论上是可能的(适定性)。其次,我们给出了它的精确的信息论可识别性条件。第三,我们推导了MMC的样本复杂度。最后,我们给出了一个实用的算法MMC与性能相媲美的国家的最先进的简单的相关问题,合成和真实的数据。

英文摘要:

Completing a data matrix X has become an ubiquitous problem in modern data science, with applications in recommender systems, computer vision, and networks inference, to name a few. One typical assumption is that X is low-rank. A more general model assumes that each column of X corresponds to one of several low-rank matrices. This paper generalizes these models to what we call mixture matrix completion (MMC): the case where each entry of X corresponds to one of several low-rank matrices. MMC is a more accurate model for recommender systems, and brings more flexibility to other completion and clustering problems. We make four fundamental contributions about this new model. First, we show that MMC is theoretically possible (well-posed). Second, we give its precise information-theoretic identifiability conditions. Third, we derive the sample complexity of MMC. Finally, we give a practical algorithm for MMC with performance comparable to the state-of-the-art for simpler related problems, both on synthetic and real data.

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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