Randomized sketches for kernel CCA

Randomized sketches for kernel CCA
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内核 CCA 的随机草图

DOI:
10.1016/j.neunet.2020.04.006
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发表时间:
2020-04
期刊:
影响因子:
7.8
通讯作者:
Wenqi Lu
Wenqi Lu
中科院分区:
计算机科学1区
文献类型:
--
作者:
Heng Lian;Fode Zhang;Wenqi Lu

文献摘要

参考文献

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核典型相关分析(KCCA)是典型相关分析的一种非线性扩展,是一种流行的分析工具。在文献中已经建立了一致性和最优收敛速度。然而,KCCA的时间复杂度为O(n 3),因此当n很大时是禁止的。基于核岭回归(KRR)随机草图的最新研究成果,提出了一种m维随机草图方法(m<< n).从技术上讲,我们建立我们的理论结果依赖于一个有趣的KCCA和KRR之间的连接,利用一种新的“对偶跟踪”设备,交替之间的无限维算子理论为基础的KCCA和有限维内核矩阵为基础的视图。
Kernel canonical correlation analysis (KCCA) is a popular tool as a nonlinear extension of canonical correlation analysis. Consistency and optimal convergence rate have been established in the literature. However, the time complexity of KCCA scales as O (n 3) and is thus prohibitive when n is large. We propose an m-dimensional randomized sketches approach for KCCA with m<< n, based on the recent work on randomized sketches for kernel ridge regression (KRR). Technically we establish our theoretical results relying on an interesting connection between KCCA and KRR by utilizing a novel “duality tracking” device that alternates between the infinite-dimensional operator-theory-based view of KCCA and the finite-dimensional kernel-matrix-based view.
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