Buscar
Mostrando ítems 61-70 de 12635
Evaluation of complex spectral-pH three-way arrays by modified bilinear least-squares: Determination of four different dyes in interfering systems
(Royal Society of Chemistry, 2005-09)
This article reports on the first application of a modified version of the bilinear least-squares model to absorbance-pH second-order data recorded for complex samples. The latter are composed of fruit drink powders, where ...
The influence of oscillations on global existence for a class of semi-linear wave equations
(WILEY-BLACKWELL, 2011)
The goal of this paper is to study the global existence of small data solutions to the Cauchy problem for the nonlinear wave equation u(tt) - a(t)(2) Delta u = u(t)(2) - a(t)(2)vertical bar del u vertical bar(2). In ...
Modeling nonbilinear total synchronous fluorescence data matrices with a novel adapted partial least squares method
(Elsevier, 2015-01)
A new residual modeling algorithm for nonbilinear data is presented, namely unfolded partial least squares with interference modeling of non bilinear data by multivariate curve resolution by alternating least squares ...
Fourth order phase-field model for local max-ent approximants applied to crack propagation
(Elsevier Science Sa, 2016-12)
We apply a fourth order phase-field model for fracture based on local maximum entropy (LME) approximants. The higher order continuity of the meshfree LME approximants allows to directly solve the fourth order phase-field ...
Chemometric modeling of kinetic-fluorescent third-order data for thiamine determination in multivitamin complexes
(Elsevier Science, 2016-03)
Thiamine (vitamin B1) was converted into a fluorescent thiochrome by oxidation catalyzed by Hg2+ in alkaline medium. The kinetic evolution for this conversion was followed by emission-excitation spectroscopy generating a ...
Fusing data of different orders for environmental monitoring
(Elsevier Science, 2019-11)
In the present work a novel application of data fusion to an environmental monitoring study is proposed. This paper involves the joint analysis of zeroth-, first- and second-order data measured on a particular environmental ...
Modelling of bioprocess non-linear fluorescence data for at-line prediction of etanercept based on artificial neural networks optimized by response surface methodology
(Elsevier Science, 2020-04)
In the last years, regulatory agencies in biopharmaceutical industry have promoted the design and implementation of Process Analytical Technology (PAT), which aims to develop rapid and high-throughput strategies for real-time ...
A green-analytical chemistry method for agrochemical-residue analysis in vegetables
(Elsevier Science, 2016-09)
Ten agrochemicals, including fungicides, insecticides, herbicides and a plant growth regulator, were quantified at part per billion levels in complex matrices using a green-analytical chemistry (GAC) method. Liquid ...
Second and Third Order Ionospheric Effects on GNSS Positioning: A Case Study in Brazil
(Springer-verlag Berlin, 2014)