Change-Point Detection using Krylov Subspace Learning
Change-Point Detection using Krylov Subspace Learning
复制标题
使用 Krylov 子空间学习进行变化点检测
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
K. Tsuda
中科院分区:
文献类型:
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作者:
T. Idé;K. Tsuda
We propose an efficient algorithm for principal component analysis (PCA) that is applicable when only the inner product with a given vector is needed. We show that Krylov subspace learning works well both in matrix compression and implicit calculation of the inner product by taking full advantage of the arbitrariness of the seed vector. We apply our algorithm to a PCA-based change-point detection algorithm, and show that it results in about 50 times improvement in computational time.