Temat: geometric representation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Model podobieństwa dla teorii przestrzeni pojęciowych – studium empiryczne
Model of Similarity for the Conceptual Spaces Theory – Empirical Study
Autorzy:: Gemel, Aleksander
Powiązania:: https://bibliotekanauki.pl/articles/2118942.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:: Conceptual Spaces
Geometric Representation of Similarity
przestrzenie pojęciowe
geometryczna reprezentacja podobieństwa
Opis:: This paper is devoted to the empirical evaluation of the extension of the Gärdenfors’ similarity model. His proposition insufficiently emphasizes the asymmetry of the modeled relationship of similarity. The proposed modification allows one to include the asymmetry of similarity and significantly sensitize the model to any contextual nuances. The model was compared with other theoretical proposals of geometrical modeling of similarity, including two asymmetric models and one symmetrical. The empirical evaluation of the model took place in two series of experiments. The obtained statistical data were compared with results inferred by tested models. The evaluation was based on iterative procedure designed to minimize the error generated by all compared models.
Źródło:: Internetowy Magazyn Filozoficzny Hybris; 2019, 45, 2; 1-16
1689-4286
Pojawia się w:: Internetowy Magazyn Filozoficzny Hybris
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Computer system for diagnostic, intervention planning and surgery of brain
Autorzy:: Cegielski, M.
Wołowiec, Ł.
Grzelak, P.
Powiązania:: https://bibliotekanauki.pl/articles/333336.pdf
Data publikacji:: 2004
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: obrazowanie medyczne
wizualizacja w 3D
obrazowanie metodą rezonansu magnetycznego
tomografia komputerowa
pozytonowa emisyjna tomografia komputerowa
reprezentacja geometryczna
medical imaging
3D visualization
MRI
CT
PET
geometric representation
Opis:: The paper presents the computer system for 3D visualization of medical images. The framework of the system and algorithms used for segmentation and visualisation are described. Models of geometric and volumetric visualisation are compared. Additionally, plans for the future system development are stated.
Źródło:: Journal of Medical Informatics & Technologies; 2004, 8; MM69-76
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: On the geometric structure of characteristic vector fields related with nonlinear equations of the Hamilton-Jacobi type
Autorzy:: Prykarpatska, N. K.
Wachnicki, E.
Powiązania:: https://bibliotekanauki.pl/articles/255568.pdf
Data publikacji:: 2007
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: Hamilton-Jacobi equations
Cartan-Monge geometric approach
Hopf-Lax type representation
Opis:: The Cartan-Monge geometric approach to the characteristics method for Hamilton-Jacobi type equations and nonlinear partial differential equations of higher orders is analyzed. The Hamiltonian structure of characteristic vector fields related with nonlinear partial differential equations of first order is analyzed, the tensor fields of special structure are constructed for defining characteristic vector fields naturally related with nonlinear partial differential equations of higher orders. The generalized characteristics method is developed in the framework of the symplectic theory within geometric Monge and Cartan pictures. The related characteristic vector fields are constructed making use of specially introduced tensor fields, carrying the symplectic structure. Based on their inherited geometric properties, the related functional-analytic Hopf-Lax type solutions to a wide class of boundary and Cauchy problems for nonlinear partial differential equations of Hamilton-Jacobi type are studied. For the non-canonical Hamilton-Jacobi equations there is stated a relationship between their solutions and a good specified functional-analytic fixed point problem, related with Hopf-Lax type solutions to specially constructed dual canonical Hamilton-Jacobi equations.
Źródło:: Opuscula Mathematica; 2007, 27, 1; 89-111
1232-9274
2300-6919
Pojawia się w:: Opuscula Mathematica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Approaches dedicated to the modelling of complex shapes application to medical data
Autorzy:: Mari, J. L.
Powiązania:: https://bibliotekanauki.pl/articles/333715.pdf
Data publikacji:: 2004
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: modelowanie geometryczne
odbudowa
obrazowanie medyczne w 3D
modelowanie serca
geometric modelling
multilayer shape representation
multiresolution
reconstruction
3D medical imaging
heart modelling
Opis:: The way to model complex shapes has a significant influence depending on the context. Handling an object can be considerably increased if a good underlying model is used. On the contrary, preponderant problems can appear if an unsuited model is associated to the object. The main criterion to discriminate existing models is to determine the balance between: their ability to control global characteristics and the possibility to handle local features of the shape. The fact is very few models are adapted both to structure and to geometrical modelling. In this paper, we first describe an overview of existing approaches. They can be classified principally in two groups: skeleton based models, used to control the global aspect of the shape, and free form models, used to control local specificities of the object. Then, trying to keep the advantages of both techniques in mind, we present an original approach based on a multi-layer model to represent a 3D object. We focus on the ability to take into account both global and local characteristics of a complex shape, on topological and morphological levels, as well as on the geometric level. To do that, the proposed model is composed of three layers. We call the boundary mesh the external layer, including a multi-resolution feature. We enhance this representation by adding an internal structure: the inner skeleton, which is topologically equivalent to the input object. In addition to that, a third layer links the structural entity and the geometrical crust, to induce an intermediary level of representation. This approach is applied to classical and medical data through a specific algorithm.
Źródło:: Journal of Medical Informatics & Technologies; 2004, 7; IP3-16
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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