Articles with "first derivative" as a keyword



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Nontrivial Solutions of Systems of Hammerstein Integral Equations with First Derivative Dependence

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Published in 2017 at "Mediterranean Journal of Mathematics"

DOI: 10.1007/s00009-017-1044-1

Abstract: By means of classical fixed point index, we prove new results on the existence, non-existence, localization and multiplicity of nontrivial solutions for systems of Hammerstein integral equations where the nonlinearities are allowed to depend on… read more here.

Keywords: nontrivial solutions; solutions systems; first derivative; hammerstein integral ... See more keywords
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Determination of rhodamine B in capsicol using the first derivative absorption spectrum

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Published in 2019 at "Optik"

DOI: 10.1016/j.ijleo.2018.12.141

Abstract: Abstract In this work an analytical method for the determination of rhodamine B in capsicol was developed based on absorption spectrum. The absorption spectra were obtained about the rhodamine B-capsicol mixed solution using spectrophotometer. The… read more here.

Keywords: capsicol; first derivative; rhodamine capsicol; spectrum ... See more keywords
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Symmetrization of Peaks in Chiral Chromatography with an Area-Invariant Resolution Enhancement Method.

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Published in 2022 at "Analytical chemistry"

DOI: 10.1021/acs.analchem.2c02683

Abstract: A majority of enantiomeric separations show some degree of peak asymmetry, which is detrimental to quantitative and semiquantitative chiral analysis. This paper presents a simple and rapid peak symmetrization algorithm for the correction or reduction… read more here.

Keywords: peaks chiral; first derivative; area; symmetrization ... See more keywords
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Mathematical models for phase transitions in biogels

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Published in 2019 at "Modern Physics Letters B"

DOI: 10.1142/s0217984919501112

Abstract: It has been shown that reversible and irreversible phase transitions of biogels can be represented by epidemic models. The irreversible chemical sol–gel transitions are modeled by the Susceptible-Exposed-Infected-Removed (SEIR) or Susceptible-Infected-Removed (SIR) epidemic systems whereas… read more here.

Keywords: maximum first; first derivative; gel; phase transitions ... See more keywords
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Non-vanishing of the first derivative of GL(3) ×GL(2) L-functions

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Published in 2017 at "International Journal of Number Theory"

DOI: 10.1142/s1793042118500513

Abstract: Let f be a fixed self-dual Hecke–Maass cusp form for SL(3, ℤ) and {μj} be an orthogonal basis of odd Hecke–Maass cusp forms for SL(2, ℤ). We prove an asymptotic formula for the average of… read more here.

Keywords: derivative functions; first derivative; vanishing first; non vanishing ... See more keywords
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Analyzing the performance of the first-derivative fluorescence spectrum for estimating leaf nitrogen concentration.

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Published in 2019 at "Optics express"

DOI: 10.1364/oe.27.003978

Abstract: Nitrogen (N) is an essential nutrient for crop growth. The rapid and non-destructive monitoring of N nutrition in crops through remote sensing is important for the accurate diagnosis and quality evaluation of crop growth status.… read more here.

Keywords: first derivative; fluorescence; derivative fluorescence; fluorescence spectrum ... See more keywords
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Assessing different regression algorithms for paddy rice leaf nitrogen concentration estimations from the first-derivative fluorescence spectrum.

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Published in 2020 at "Optics express"

DOI: 10.1364/oe.395478

Abstract: The non-destructive and rapid estimation of the crop's leaf nitrogen concentration (LNC) is significant for the quality evaluation and precise management of nitrogen (N) fertilizer. First derivative can be applied to reduce the noise in… read more here.

Keywords: estimation; regression; lnc estimation; pca ... See more keywords
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Meromorphic function sharing entire functions IM with its first derivative

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Published in 2019 at "Quaestiones Mathematicae"

DOI: 10.2989/16073606.2019.1649312

Abstract: Abstract In this paper, we use the idea of normal family to investigate the problem of meromorphic function having finitely many poles that share entire functions IM with its first derivative. read more here.

Keywords: functions first; first derivative; entire functions; meromorphic function ... See more keywords
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New first derivative spectrophotometric methods for the estimation of Bumetanide in tablet dosage forms

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Published in 2019 at "Research Journal of Pharmacy and Technology"

DOI: 10.5958/0974-360x.2019.00827.8

Abstract: First derivative spectrophotometric methods have been developed for the assay of Bumetanide using Shimadzu UV-1800 Model double beam UV-VIS spectrophotometer in reagents such as hydrochloric acid, phosphate buffer pH 3.6, phosphate buffer pH 2.0 and… read more here.

Keywords: spectrophotometric methods; derivative spectrophotometric; first derivative; phosphate buffer ... See more keywords