A three-way array must be represented in two-way form if its structure is to be described and manipulated by means of matrix notation. Historically, two methods, here calledàrray stretching' andàrray slicing', have been used. More recently, however, array slicing has often been overlooked, resulting in a loss of mathematical flexibility. `Stretching' involves matricizing (unfolding) the three-w...

Alcaftadine (ALC) and Ketorolac tromethamine (KET) binary combination is a new co-formulated pharmaceutical product that used to treat allergic conjunctivitis. The present work utilizes three simple, precise, accurate, rapid spectrophotometric chemometric methods determine the recently released formulation. include first derivative of absorbance spectrum (Method A), dual-wavelength B), subtract...

This paper presents the results of continuous monitoring of 11 pollution indicators of municipal wastewater that were discharged into the natural recipient (the sea) at three locations in the Split area during four years (2006-2009). Experimental data were analyzed by basic statistical methods for determination of mean and median values, standard deviations, minimal and maximal value of the mea...

Visible/near-infrared spectroscopy combined with chemometric methods has been widely used in fruit quality detection. In order to ensure the performance of prediction model, calibration samples train model should cover range variability anticipated samples. However, this requirement is difficult meet practice, especially, for detection from cross-years variational cultivation conditions, climat...

We linked coffee quality to its different varieties. This is of interest because the identification of coffee varieties should help coffee trading and consumption. Laser-induced breakdown spectroscopy (LIBS) combined with chemometric methods was used to identify coffee varieties. Wavelet transform (WT) was used to reduce LIBS spectra noise. Partial least squares-discriminant analysis (PLS-DA), ...