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23. Konveksne množice in konveksne funkcije : zaključna nalogaBećo Merulić, 2015, diplomsko delo Ključne besede: afine množice, konveksne množice, epigraf, zaprtje, relativno odprtje, efektivna domena, Jensenova neenakost, konveksne funkcije, zveznost konveksnih funkcij, subgradient, gradient, diferenciabilnost konveksnih funkcij
Objavljeno v RUP: 13.11.2017; Ogledov: 2421; Prenosov: 46
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26. Pythagorean-hodograph cycloidal curvesJernej Kozak, Marjetka Knez, Mladen Rogina, Vito Vitrih, 2015, izvirni znanstveni članek Opis: In the paper, Pythagorean-hodograph cycloidal curves as an extension of PH cubics are introduced. Their properties are examined and a constructive geometric characterization is established. Further, PHC curves are applied in the Hermite interpolation, with closed form solutions been determined. The asymptotic approximation order analysis carried out indicates clearly which interpolatory curve solution should be selected in practice. This makes the curves introduced here a useful practical tool, in particular in algorithms that guide CNC machines.
Ključne besede: pitagorejski hodograf, C-krivulje, trigonometrične funkcije, karakterizacija, Hermiteova interpolacija, asimptotični red aproksimacije, Pythagorean-hodograph, C-curves, trigonometric functions, characterization, Hermite interpolation, asymptotic approximation order
Objavljeno v RUP: 08.08.2016; Ogledov: 2704; Prenosov: 198
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27. Isogeometric analysis with geometrically continuous functions on two-patch geometriesMario Kapl, Vito Vitrih, Bert Jüttler, Katharina Birner, 2015, izvirni znanstveni članek Opis: We study the linear space of Cs-smooth isogeometric functions defined on a multi-patch domain % % R2. We show that the construction of these functions is closely related to the concept of geometric continuity of surfaces, which has originated in geometric design. More precisely, the Cs-smoothness of isogeometric functions is found to be equivalent to geometric smoothness of the same order (Gs-smoothness) of their graph surfaces. This motivates us to call them Cs-smooth geometrically continuous isogeometric functions. We present a general framework to construct a basis and explore potential applications in isogeometric analysis. The space of C1-smooth geometrically continuous isogeometric functions on bilinearly parameterized two-patch domains is analyzed in more detail. Numerical experiments with bicubic and biquartic functions for performing L2 approximation and for solving Poisson%s equation and the biharmonic equation on two-patch geometries are presented and indicate optimal rates of convergence.
Ključne besede: izogeometrična analiza, geometrijska zveznost, geometrijsko vzezne izogeometrične funkcije, biharmonična enačba, isogeometric analysis, geometric continuity, geometrically continuous isogeometric functions, biharmonic equation, multi-patch domain
Objavljeno v RUP: 15.10.2015; Ogledov: 3753; Prenosov: 192
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