arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.09489cs.LGstat.ML
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非对称随机投影

Asymmetric Random Projections

University of California Berkeley(加州大学伯克利分校);Amazon(亚马逊)

Nick Ryder, Zohar Karnin, Edo Liberty

摘要:

随机投影(RP)是一种流行的工具,用于降低维数,同时保持局部几何。在许多应用中,要投影的数据集是事先给我们的,但目前的RP技术不利用有关数据的信息。在本文中,我们提供了一个计算轻的方式来提取统计数据,允许设计一个数据相关的RP与数据无关RP相比,具有优越的性能。我们解决的情况下,如矩阵乘法和线性回归/分类,我们希望估计两个可能不同的来源的向量对之间的内积。我们的技术利用了源之间的差异,并且可以证明优于不经意的RP。此外,我们提供了大量的实验比较RP与我们的方法显示显着的性能提升快速矩阵乘法,回归和分类问题。

英文摘要:

Random projections (RP) are a popular tool for reducing dimensionality while preserving local geometry. In many applications the data set to be projected is given to us in advance, yet the current RP techniques do not make use of information about the data. In this paper, we provide a computationally light way to extract statistics from the data that allows designing a data dependent RP with superior performance compared to data-oblivious RP. We tackle scenarios such as matrix multiplication and linear regression/classification in which we wish to estimate inner products between pairs of vectors from two possibly different sources. Our technique takes advantage of the difference between the sources and is provably superior to oblivious RPs. Additionally, we provide extensive experiments comparing RPs with our approach showing significant performance lifts in fast matrix multiplication, regression and classification problems.

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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