Proportional Volume Sampling and Approximation Algorithms for A-Optimal Design
Proportional Volume Sampling and Approximation Algorithms for A-Optimal Design
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A 最优设计的比例体积采样和近似算法
DOI:
10.1137/1.9781611975482.84
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发表时间:
2019
期刊:
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通讯作者:
Tantipongpipat, U.
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文献类型:
--
作者:
Nikolov, A;Singh, M.;Tantipongpipat, U.
We study optimal design problems in which the goal is to choose a set of linear measurements to obtain the most accurate estimate of an unknown vector. We study the-optimal design variant where the objective is to minimize the average variance of the error in the maximum likelihood estimate of the vector being measured. We introduce theproportional volume samplingalgorithm to obtain nearly optimal bounds in the asymptotic regime when the numberof measurements made is significantly larger than the dimensionand obtain the first approximation algorithms whose approximation factor does not degrade with the number of possible measurements whenis small. The algorithm also gives approximation guarantees for other optimal design objectives such as-optimality and the generalized ratio objective, matching or improving the previously best-known results. We further show that bounds similar to ours cannot be obtained for-optimal design and that-optimal design is NP-hard to approximate within a fixed constant when.
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ACM-SIAM Symposium on Discrete Algorithms
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期刊:
ArXiv
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