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The effect of the autocorrelation on the performance of the T<sup>2</sup> chart
(2015-01-01)
In this article, we consider the T<sup>2</sup> control chart for bivariate samples of size n with observations that are not only cross-correlated but also autocorrelated. The cross covariance matrix of the sample mean ...
White light generation controlled by changing the concentration of silver nanoparticles hosted by Ho<sup>3+</sup>/Tm<sup>3+</sup>/Yb<sup>3+</sup> doped GeO<inf>2</inf>-PbO glasses
(2015-05-02)
Frequency upconversion (UC) experiments were performed with GeO<inf>2</inf>-PbO glasses, containing silver nanoparticles (NPs), doped with holmium (Ho<sup>3+</sup>), thulium (Tm<sup>3+</sup>) and ytterbium (Yb<sup>3+</sup>) ...