Asymptotic minimaxity of false discovery rate thresholding for sparse exponential data
Asymptotic minimaxity of false discovery rate thresholding for sparse exponential data
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DOI:
10.1214/009053606000000920
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发表时间:
2006-12-01
影响因子:
4.5
通讯作者:
Jin, Jiashun
中科院分区:
文献类型:
--
作者:
Donoho, David;Jin, Jiashun
We apply FDR thresholding to a non-Gaussian vector whose coordinates X-i, i = 1,..., n, are independent exponential with individual means mu(i). The vector mu = (mu(i)) is thought to be sparse, with most coordinates 1 but a small fraction significantly larger than 1; roughly, most coordinates are simply 'noise,' but a small fraction contain 'signal.' We measure risk by percoordinate mean-squared error in recovering log(mu(i)), and study minimax estimation over parameter spaces defined by constraints on the per-coordinate p-norm of log(mu(i)), 1/n Sigma(n)(i=1) log(p) (mu(i))