National Repository of Grey Literature 135 records found  beginprevious126 - 135  jump to record: Search took 0.02 seconds. 
Flood situations influence on water quality in reservoirs controlled by means of mathematical modelling
Kafková, Dagmar ; Balejová, Marcela
Příspěvek se zabývá možnostmi matematického modelování pro sledování vývoje kvality vody v nádržích za běžných provozních podmínek i během extrémních povodňových situací se zvláštním zreželem na nádrž Pastviny na Divoké Orlici. Pro tuto nádrž byl upraven dvourozměrný matematický model CE-QUAL-W2, který se již dříve osvědčil při modelování nádrže Římov na Malši. Validaci modelu pro nádrž Pastviny nelze v současné době považovat za dokončenou, protože z předchozích let není k dispozici dostatečné množství bilogických a chemických dat, avšak bathymetrická data již odpovídají současnému stavu po vypuštění a vyčištění nádrže a model je připraven pro použití, jakmile budou potřebná data shromážděna.
Fieldless Methods for the Simulation of Induction Heating of 3D Non-Ferromagnetic Metal Bodies
Doležel, Ivo ; Šolín, Pavel ; Ulrych, B.
In the present study we introduce a class of novel methods for the mathematical modelling and numerical solution of the induction heating of non-ferromagnetic metal bodies in harmonic electromagnetic fields. The main advantage of the presented approach is the elimination of the surrounding air from the electromagnetic model.
Mathematical modelling of processes in surroundings of underground radioactive waste repository
Blaheta, Radim ; Kohut, Roman ; Šňupárek, Richard
The solution of stability and safety of underground repositories of the spent nuclear fuel requires to use mathematical modelling of coupled thermal, hydrogeological and mechanical processes in rock mass. The contribution deals with methods of mathematical modelling and describes some examples of model problems, which are relevant for the assessment of geological repositories and can be used for testing of numerical methods and the corresponding software.
Numerical Analysis. Proceedings of the seminar dedicated to the jubilee of Ivo Marek
Blaheta, Radim ; Starý, Jiří
This proceedings contains the extended abstracts of the contributions delivered at the Seminar on Numerical Analysis, held at the Institute of Geonics AS CR Ostrava. The scope of the seminar includes study of algorithms for the solution of problems of continuous mathematics, algorithms of numerical linear algebra and application of the numerical methods in mathematical modelling.
Mathematical modelling of bituminous coal seams burning out
Kozubek, T. ; Klika, Z. ; Dostál, Z. ; Dvořák, D. ; Martinec, Petr
Burning out of three coal seams in Upper Silesian Coal Basin was modelled with simplifying assumptions. The heat equation with suitable initial and boundary conditions was used for the description of this process.
Náročné uplatnění iteračních řešičů v geotechnice
Blaheta, Radim ; Byczanski, Petr ; Jakl, Ondřej ; Kohut, Roman ; Kolcun, Alexej ; Krečmer, Karel ; Starý, Jiří
In many fields of science and engineering, we can see challenging tasks, which require application of mathematical modelling. The physical phenomena are simulated with the aid of the finite element method and this simulation leads to huge computational demands, which are concentrated mainly to the solution of large-scale systems of equations. For such systems, we need high performance iterative solvers.

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