arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1801.09657math.NAcs.LGcs.NAstat.ME
收藏

结构观测的矩阵补全

Matrix Completion for Structured Observations

University of California, Los Angeles(加州大学洛杉矶分校)

Denali Molitor, Deanna Needell

AI总结:

本文提出改进的核范数最小化方法,以考虑观测与未观测条目间的结构性差异,提升矩阵补全效果。

摘要:

预测或填补缺失数据(即矩阵补全)是当今数据驱动世界中的常见挑战。以往策略通常假设观测与缺失条目之间无结构性差异。不幸的是,这一假设在许多应用中显得不现实。例如,在经典的Netflix挑战中,预测用户对未观看电影的评分时,观众未观看某部电影可能表明对该电影缺乏兴趣,从而建议评分低于预期。本文提出调整标准核范数最小化策略,通过正则化未观测条目的值来考虑此类结构性差异。我们证明在某些情况下,所提方法优于核范数最小化。

英文摘要:

The need to predict or fill-in missing data, often referred to as matrix completion, is a common challenge in today's data-driven world. Previous strategies typically assume that no structural difference between observed and missing entries exists. Unfortunately, this assumption is woefully unrealistic in many applications. For example, in the classic Netflix challenge, in which one hopes to predict user-movie ratings for unseen films, the fact that the viewer has not watched a given movie may indicate a lack of interest in that movie, thus suggesting a lower rating than otherwise expected. We propose adjusting the standard nuclear norm minimization strategy for matrix completion to account for such structural differences between observed and unobserved entries by regularizing the values of the unobserved entries. We show that the proposed method outperforms nuclear norm minimization in certain settings.

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。

↑