Dimension reduction techniques for multivariate time series decompose the observed into a few useful independent/orthogonal univariate components. A spectral domain method is developed second-order stationary that linearly transforms several groups of lower-dimensional subseries. These subseries have non-zero coherence among components within group but zero across groups. The expressed as sum f...

in the present study, quantitative relationships between molecular structure and anti-tubercular activity of some 5-methyl/trifluoromethoxy-1 h -indole-2,3-dione-3-thiosemicarbazone derivatives were discovered. the detailed application of an efficient linear method and principal component regression (pcr) for the evaluation of quantitative structure activity relationships of the studied compound...