We look at a connection between the $\ell_q,0\leq q\leq 1$,
Optimization and under-determined linear systems of equations with sparse
Solutions. The case $q=1$, or in other words $\ell_1$ optimization and its a
Connection with linear systems has been thoroughly studied in last several
Decades; in fa...
We announce the discovery of the most massive pulsating hydrogen-atmosphere
(DA) white dwarf (WD) ever discovered, GD 518. Model atmosphere fits to the
Optical spectrum of this star show it is a 12,030 +/- 210 K WD with a log(g) =
9.08 +/- 0.06, which corresponds to a mass of 1.20 +/- 0.03 Msun. Ste...
We propose a Block-DCT and PCA based image perceptual hash in
This article and explore the algorithm in the application of tamper detection.
The main idea of the algorithm is to integrate color histogram and DCT
Coefficients of image blocks as perceptual feature, then to compress perceptual
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