Search results for "Correction method"

showing 3 items of 13 documents

Example of a technique for evaluation of interferences caused by complicated sample matrix elements in ICP-AES determination

2001

An example of a useful and rapid procedure for the evaluation of interferences caused by complicated sample matrices in inductively coupled plasma atomic emission spectrometry (ICP-AES) is described. Using simple acid-base standards, all the elements investigated were determined separately in complicated matrices with satisfactory results. Multiple linear regression was used to calculate the linear correction coefficients for each matrix element analyzed. Good analytical results improved still further when this correction method was used.

Correction methodChemistryInductively coupled plasma atomic emission spectroscopyLinear regressionAnalytical chemistryMatrix elementInductively coupled plasmaError detection and correctionInterference (wave propagation)Biological systemBiochemistrySample (graphics)Fresenius' Journal of Analytical Chemistry
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A stabilized finite element method for particulate two-phase flow equations laminar isothermal flow

1997

A finite element method for the solution of particulate two-phase flows is presented. The governing system has the form of compressible Navier-Stokes equations with unknown pressure. Therefore, the proposed method must capture the main features of stabilized methods used for incompressible as well as for compressible Navier-Stokes equations. Solution of the resulting nonlinear algebraic system of equations is based on the linearization using Newton method in conjunction with Generalized Minimal Residual iterative solver and Incomplete LU preconditioning. The method has been tested for three test cases including venturi tube flow, flow over backward step and mixing of flows in t-junction.

Mechanical EngineeringIsothermal flowComputational MechanicsGeneral Physics and AstronomyLaminar flowMechanicsCompressible flowFinite element methodComputer Science ApplicationsEuler equationsPhysics::Fluid Dynamicssymbols.namesakeClassical mechanicsMechanics of MaterialsPressure-correction methodsymbolsNavier–Stokes equationsMathematicsExtended finite element methodComputer Methods in Applied Mechanics and Engineering
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Mode superposition methods in dynamic analysis of classically and non-classically damped linear systems

1986

Mode-superposition analysis is an efficient tool for the evaluation of the response of linear systems subjected to dynamic agencies. Two well-known mode-superposition methods are available in the literature, the mode-displacement method and the mode-acceleration method. Within this frame a method is proposed called a dynamic correction method which evaluates the structural response as the sum of a pseudostatic response, which is the particular solution of the differential equations, and a dynamic correction evaluated using a reduced number of natural modes. The greater accuracy of the proposed method with respect to the other methods is evidenced through extensive numerical tests, for class…

Method of undetermined coefficientsSuperposition principleCorrection methodDifferential equationFrame (networking)Linear systemEarth and Planetary Sciences (miscellaneous)Mode (statistics)Applied mathematicsNumerical testsGeotechnical Engineering and Engineering GeologyAlgorithmMathematics
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