In this work, we quantified goat milk powder adulteration by adding urea, melamine, and starch individually simultaneously, with the utilization of near infrared (NIR) spectroscopy coupled chemometrics. For single-adulterant samples, successive projections algorithm (SPA) selected three, four optimal wavelengths for starch, respectively. Models were built based on partial least squares regressi...

This article describes several linear pretreatments based on orthogonal projections. The main differences of these pretreatments lie in the way the information to be removed is identified, using calibration dataset, pure spectra, experimental designs or mathematical models. Removing all the undesired spectral information yields spectra proportional to the net analyte signal, so it is important ...

A method is proposed for obtaining three simultaneous projections of a target from a single radiation pulse, which also allows the relative orientation of successive targets to be determined. The method has application to femtosecond x-ray diffraction, and does not require solution of the phase problem. We show that the principal axes of a compact charge-density distribution can be obtained fro...

We introduce a hybrid projection-localization method for solving large convex cone programs. The method interleaves a series of projections onto localization sets with the classical alternating projections method for convex feasibility problems; the problem is made amenable to the method by reducing it to a convex feasibility problem composed of a subspace and a cone via its homogeneous self-du...

The aim of the work was a multivariate calibration concentration unrefined sunflower oil, considered as adulteration, in mixture with flaxseed oil. relevance study is due to need develop simple and effective method for detecting falsification oil which superior content essential polyunsaturated fatty acids olive A few works only are devoted identifying adulteration unlike oil.Multivariate carri...

X-ray fluorescence nanotomography provides unprecedented sensitivity for studies of trace metal distributions in whole biological cells. Dose fractionation, in which one acquires very low dose individual projections and then obtains high statistics reconstructions as signal from a voxel is brought together (Hegerl & Hoppe, 1976), requires accurate alignment of these individual projections so as...

This paper introduces a method based on the near-infrared spectroscopy for rapid measurement of the biodiesel conversion rate during the transesterification of triolein with methanol. To build the regression model between the conversion rate and the spectral date, the real conversion rate of glycerides to methyl esters was analyzed by Proton Nuclear Magnetic Resonance (HNMR) spectroscopy, and s...

In this paper we present a novel approach for microcalcification detection in Digital Breast Tomosynthesis (DBT) datasets. A reconstructionindependent approach, working directly on the projected views, is proposed. Wavelet filter responses on the projections are thresholded and combined to obtain candidate microcalcifications. For each candidate, we create a fuzzy contour through a multi-level ...