Search results for "Matlab code"

showing 4 items of 4 documents

THE GYROTRON STARTUP SCENARIO IN THE SINGLE MODE TIME DEPENDENT APPROACH

2019

The paper explains how to solve the Gyrotron equation system in the Single Mode Time Dependent Approach. In particular, we point out problems encountered when solving these well-known equations. The starting current estimation approach a using time model is suggested. The solution has been implemented in the Matlab code, which is attached to the article.

010302 applied physicsPhysicstime dependent approachgyrotronNuclear engineeringSingle-mode optical fiberMatlab code01 natural sciences010305 fluids & plasmaslaw.inventiondifferential equationlawModeling and SimulationGyrotron0103 physical sciencesQA1-939MathematicsAnalysisMathematical Modelling and Analysis
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Optimization of Gyrotron Resonator’s Dimensions

2021

This paper explains the procedure of determining the initial dimensions of a gyrotron resonator. In particular, the paper discusses which geometrical parameters impact the wave properties of the resonator. The solution is implemented using Matlab software and estimations are performed with the use of the SMath Studio spreadsheet. © 2021 National Institute of Telecommunications. All rights reserved.

PhysicsComputer Networks and Communicationsbusiness.industry020208 electrical & electronic engineeringMatlab code02 engineering and technologyCold cavity01 natural sciences010305 fluids & plasmaslaw.inventionResonatorOpticslawGyrotrongyrotron design0103 physical sciences:NATURAL SCIENCES [Research Subject Categories]0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringbusinessJournal of Telecommunications and Information Technology
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Fast MATLAB assembly of FEM matrices in 2D and 3D: Edge elements

2014

We propose an effective and flexible way to assemble finite element stiffness and mass matrices in MATLAB. We apply this for problems discretized by edge finite elements. Typical edge finite elements are Raviart-Thomas elements used in discretizations of H(div) spaces and Nedelec elements in discretizations of H(curl) spaces. We explain vectorization ideas and comment on a freely available MATLAB code which is fast and scalable with respect to time.

FOS: Computer and information sciencesDiscretizationfinite element method97N80 65M60Matlab codeComputational scienceMathematics::Numerical AnalysisMATLAB code vectorizationmedicineFOS: MathematicsMathematics - Numerical AnalysisMATLABMathematicscomputer.programming_languageCurl (mathematics)ta113Nédélec elementApplied Mathematicsta111StiffnessRaviart–Thomas elementMixed finite element methodNumerical Analysis (math.NA)Finite element methodComputational Mathematicsedge elementScalabilityComputer Science - Mathematical Softwaremedicine.symptomcomputerMathematical Software (cs.MS)
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Intraocular Telescopic System Design: Optical and Visual Simulation in a Human Eye Model

2016

Purpose. To design an intraocular telescopic system (ITS) for magnifying retinal image and to simulate its optical and visual performance after implantation in a human eye model. Methods. Design and simulation were carried out with a ray-tracing and optical design software. Two different ITS were designed, and their visual performance was simulated using the Liou-Brennan eye model. The difference between the ITS was their lenses’ placement in the eye model and their powers. Ray tracing in both centered and decentered situations was carried out for both ITS while visual Strehl ratio (VSOTF) was computed using custom-made MATLAB code. Results. The results show that between 0.4 and 0.8 mm of d…

Article Subjectbusiness.industryRetinal damageComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONStrehl ratioMatlab codeRetinal image03 medical and health sciencesOphthalmology0302 clinical medicinemedicine.anatomical_structurelcsh:Ophthalmologylcsh:RE1-994030221 ophthalmology & optometryMedicineSoftware designSystems designRay tracing (graphics)Computer visionHuman eyeArtificial intelligencebusiness030217 neurology & neurosurgeryResearch ArticleJournal of Ophthalmology
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