Outlier-robust moment-estimation via sum-of-squares
Outlier-robust moment-estimation via sum-of-squares
复制标题
通过平方和进行异常值稳健矩估计
DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
David Steurer
中科院分区:
文献类型:
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作者:
Pravesh Kothari;David Steurer
We develop efficient algorithms for estimating low-degree moments of unknown distributions in the presence of adversarial outliers. The guarantees of our algorithms improve in many cases significantly over the best previous ones, obtained in recent works of Diakonikolas et al, Lai et al, and Charikar et al. We also show that the guarantees of our algorithms match information-theoretic lower-bounds for the class of distributions we consider. These improved guarantees allow us to give improved algorithms for independent component analysis and learning mixtures of Gaussians in the presence of outliers.
Our algorithms are based on a standard sum-of-squares relaxation of the following conceptually-simple optimization problem: Among all distributions whose moments are bounded in the same way as for the unknown distribution, find the one that is closest in statistical distance to the empirical distribution of the adversarially-corrupted sample.
DOI:
10.1137/1.9781611975031.171
发表时间:
2017-04
期刊:
ArXiv
影响因子:
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作者:
Ilias Diakonikolas;Gautam Kamath;D. Kane;Jerry Li;Ankur Moitra;Alistair Stewart
通讯作者:
Ilias Diakonikolas;Gautam Kamath;D. Kane;Jerry Li;Ankur Moitra;Alistair Stewart
DOI:
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发表时间:
2017-03
期刊:
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影响因子:
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作者:
Ilias Diakonikolas;Gautam Kamath;D. Kane;Jerry Li;Ankur Moitra;Alistair Stewart
通讯作者:
Ilias Diakonikolas;Gautam Kamath;D. Kane;Jerry Li;Ankur Moitra;Alistair Stewart