arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1507.04155cs.LGstat.ML
收藏

ALEVS:利用统计杠杆抽样的主动学习

ALEVS: Active Learning by Statistical Leverage Sampling

Bilkent University(比尔肯大学)

Cem Orhan, Öznur Taştan

摘要:

与通过选择有效查询的被动学习相比,主动学习旨在通过使用更少的标签请求来获得高精度的分类器。在过去的二十年中,已经开发了许多主动学习方法,这些方法基于未标记数据点的信息性或代表性对查询进行采样。在这项工作中,我们探索了一种基于统计杠杆分数的新型查询标准。矩阵中的行的统计杠杆分数是包含其(顶部)左奇异向量的矩阵的平方行范数,并且是行对矩阵的影响的度量。杠杆分数已被用于检测回归诊断中的高影响力点,最近已被证明是有用的数据分析和随机低秩矩阵近似算法。我们探讨如何采样数据实例与高统计杠杆分数执行主动学习。我们在几个二元分类数据集上的实证比较表明,查询高杠杆点是一种有效的策略。

英文摘要:

Active learning aims to obtain a classifier of high accuracy by using fewer label requests in comparison to passive learning by selecting effective queries. Many active learning methods have been developed in the past two decades, which sample queries based on informativeness or representativeness of unlabeled data points. In this work, we explore a novel querying criterion based on statistical leverage scores. The statistical leverage scores of a row in a matrix are the squared row-norms of the matrix containing its (top) left singular vectors and is a measure of influence of the row on the matrix. Leverage scores have been used for detecting high influential points in regression diagnostics and have been recently shown to be useful for data analysis and randomized low-rank matrix approximation algorithms. We explore how sampling data instances with high statistical leverage scores perform in active learning. Our empirical comparison on several binary classification datasets indicate that querying high leverage points is an effective strategy.

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。

↑