Competitive online algorithms for resource allocation over the positive semidefinite cone
Competitive online algorithms for resource allocation over the positive semidefinite cone
复制标题
正半定锥上资源分配的竞争性在线算法
DOI:
10.1007/s10107-018-1305-1
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发表时间:
2018
影响因子:
2.7
通讯作者:
Fazel, Maryam
中科院分区:
文献类型:
--
作者:
Eghbali, Reza;Saunderson, James;Fazel, Maryam
We consider a new and general online resource allocation problem, where the goal is to maximize a function of a positive semidefinite (PSD) matrix with a scalar budget constraint. The problem data arrives online, and the algorithm needs to make an irrevocable decision at each step. Of particular interest are classic experiment design problems in the online setting, with the algorithm deciding whether to allocate budget to each experiment as new experiments become available sequentially. We analyze two greedy primal-dual algorithms and provide bounds on their competitive ratios. Our analysis relies on a smooth surrogate of the objective function that needs to satisfy a new diminishing returns (PSD-DR) property (that its gradient is order-reversing with respect to the PSD cone). Using the representation for monotone maps on the PSD cone given by Löwner’s theorem, we obtain a convex parametrization of the family of functions satisfying PSD-DR. We then formulate a convex optimization problem to directly optimize our competitive ratio bound over this set. This design problem can be solvedofflinebefore the data start arriving. The online algorithm that uses the designed smoothing is tailored to the given cost function, and enjoys a competitive ratio at least as good as our optimized bound. We provide examples of computing the smooth surrogate for D-optimal and A-optimal experiment design, and demonstrate the performance of the custom-designed algorithm.
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影响因子:
6
作者:
Yining Wang;Adams Wei Yu;Aarti Singh
通讯作者:
Aarti Singh
DOI:
10.1007/978-3-642-31594-7_59
发表时间:
2012-04
期刊:
--
影响因子:
--
作者:
Marco Molinaro Carnegie;Mellon R. Ravi;C. Mellon
通讯作者:
Marco Molinaro Carnegie;Mellon R. Ravi;C. Mellon
DOI:
--
发表时间:
2016
期刊:
IEEE Annual Symposium on Foundations of Computer Science
影响因子:
--
作者:
Y. Azar;Niv Buchbinder;T;Shahar Chen;I. Cohen;Anupam Gupta;Zhiyi Huang;N. Kang;V. Nagarajan;J. Naor;Debmalya Panigrahi
通讯作者:
Debmalya Panigrahi
影响因子:
2.7
作者:
Agrawal, Shipra;Wang, Zizhuo;Ye, Yinyu
通讯作者:
Ye, Yinyu
DOI:
10.21067/mpej.v5i1.5184
发表时间:
2016
期刊:
arXiv: Machine Learning
影响因子:
--
作者:
Yining Wang;Adams Wei Yu;Aarti Singh
通讯作者:
Aarti Singh