György Bicsák, Dávid Sziroczák, Aaron Latty

Numerical methods


Curve Fitting Methods

In real life engineering problems, in most cases, some kind of input data has to be processed, analysed and evaluated, based on which the given system, tool, unit or model behaviour can be concluded. These input data are mostly generated during some kind of experiment: some kind of physical quantity has to be converted to a numerical value in some sort of way. For example: we can measure the flow velocity, the pressure, the temperature of a fluid, and in the possession of the material properties and the available flow-domain the mass flow rate can be calculated. Similarly, by measuring the voltage and current of an electrical circuit gives the circuit’s electrical resistance. Or the expansion/compression of a spring indicates the applied force on it, if the characteristics of the spring is known. From these examples we can conclude two states: it is really rare that the actually needed physical quantity can be measured; and because the experiments are designed and executed usually by humans, there is generally a measurement error/scattering in the data (you know: one measurement is not measurement).

Numerical methods

Tartalomjegyzék


Kiadó: Akadémiai Kiadó

Online megjelenés éve: 2019

ISBN: 978 963 454 283 4

This book on Numerical Methods is part of the Transportation and Vehicle Engineering Faculty’s curriculum at the Budapest University of Technology and Economics, created under the Stipendium Hungaricum Scholarship Programme. The book demonstrates the aim of developing and using numerical methods. Instead of relying on more complicated and expensive analytical solution methods, simpler arithmetical equations are used to approximate the accurate solution with the required level of accuracy. After discussing the various sources and propagation of solution errors, the book discusses the solution of single variable equations and system of equations. Following chapters describe the two main curve fitting methods; approximation and interpolation. These chapters are followed by the numerical differentiation and integration methods, then finally the numerical solutions for ordinary and partial differentiation equations are outlined. MATLAB is one of the most popular choice today for numerical computing, with its user friendly, yet powerful computing capability. It is practically an industry standard for prototyping and new developments, and there is great value for students to be introduced to solving problems with MATLAB. Many chapters in the notes show examples implemented in MATLAB, with actual working code available to use and practice.

Hivatkozás: https://mersz.hu/bicsak-numerical-methods//

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