Results 51 to 60 of about 1,012,781 (161)

IDENTIFICATION AND DELINEATION OF HYDROLOGICAL HOMOGENEOUS REGIONS BY USING L-MOMENT FOR SELECTED BASINS

open access: yesJournal of Engineering and Sustainable Development, 2016
The paper presents results of an application of the L-moments based regional flood frequency analysis to annual maximum peak (AMP) flows observed at five stations (Balikian,Jundian.Manguba,Bekhme and Eski-Kelek) located on the main stream of the Greater
عبدالوهاب محمد يونس
doaj  

OPTIMIZATION OF A UV-VIS SPECTROMETRIC METHOD FOR CAFFEINE ANALYSIS IN TEA, COFFEE AND OTHER BEVERAGES

open access: yesScientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2014
A method has been developed and validated for the determination of caffeine in tea, coffee and other beverages by UV-VIS spectrometry. A linear calibration curve was generated with caffeine concentration ranging from 3 mg∙L-1 to 18 mg∙L-1.
S. DOBRINAS   +4 more
doaj  

The L-Curve Criterion as a Model Selection Tool in PLS Regression

open access: yesJournal of Probability and Statistics, 2019
Partial least squares (PLS) regression is an alternative to the ordinary least squares (OLS) regression, used in the presence of multicollinearity. As with any other modelling method, PLS regression requires a reliable model selection tool.
Abdelmounaim Kerkri   +2 more
doaj   +1 more source

A simplified L-curve method as error estimator. ETNA - Electronic Transactions on Numerical Analysis

open access: yes, 2020
The L-curve method is a well known heuristic method for choosing the regularization parameter for ill-posed problems by selecting it according to the maximal curvature of the L-curve. In this article, we propose a simplified version that replaces the curvature essentially by the derivative of the parameterization on the y-axis.
Raik, Kemal, Kindermann, Stefan
openaire  

Numerical Analysis of a Fractional Cauchy Problem for the Laplace Equation in an Annular Circular Region

open access: yesFractal and Fractional
The Cauchy problem for the Laplace equation in an annular bounded region consists of finding a harmonic function from the Dirichlet and Neumann data known on the exterior boundary.
José Julio Conde Mones   +5 more
doaj   +1 more source

DETERMINATION OF LEAD AND CADMIUM LEVELS IN CANNED SARDINES USING ATOMIC ABSORPTION SPECTROPHOTOMETRY

open access: yesJIIS: Jurnal Ilmiah Ibnu Sina
Canned sardines are hermetically sealed and processed to ensure sterility and provide practical convenience in processing fish. Contact between food and canned causes the migration of metal elements into them.
Citra Hayu Adi Makayasa   +5 more
doaj   +1 more source

A green chemical analysis of iron (III) in water sample using a smart phone

open access: yesMethodsX
In this study, a smartphone was used as the photometer for determination of iron (III) by forming a complex with thiocyanate. After color formation at concentrations of, image capture with mobile phone, signal analysis of each sample was performed by the
Jalal Hassan   +3 more
doaj   +1 more source

Construction of the risk factor model of gastric cancer and its value in screening opportunity and options

open access: yesZhongguo aizheng zazhi, 2019
Background and purpose: The opportunistic screening, also known as individual screening, is a clinic-based screening method, which is a feasible way to improve the detection rate of early gastric cancer in China.
苗长丰   +4 more
doaj  

Voltammetric Determination of Indole-3-acetic Acid in Extract of Pistia stratiotes

open access: yesOrbital: The Electronic Journal of Chemistry, 2019
A simple, fast and direct method to determine indole-3-acetic acid (IAA) was developed using a carbon paste electrode (CPE) as working electrode and square wave voltammetry (SWV) as an electrochemical method. The experimental and instrumental parameters
Jaqueline da Silva Santos   +2 more
doaj  

Adaptive Regularization Using L-curve Method for Magnetic Inverse Source Problem

open access: yesTransactions of the Society of Instrument and Control Engineers, 2006
KOJIMA, Fumio   +2 more
openaire   +2 more sources

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