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Wyszukujesz frazę "topological analysis" wg kryterium: Temat

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    Wyświetlanie 1-10 z 10
    Tytuł:
    An application of persistent homology and the graph theory to linguistics: The case of Tifinagh and Phoenician scripts
    Autorzy:
    Bouazzaoui, Hajar
    Elomary, Mohamed Abdou
    Mamouni, My Ismail
    Powiązania:
    https://bibliotekanauki.pl/articles/1827549.pdf
    Data publikacji:
    2021-09-06
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    topological data analysis
    persistent homology
    graph theory
    writing systems
    Abjad scripts
    Alphabet scripts
    Tifinagh script
    Phoenician script
    Opis:
    As the origin of the Tifinagh script remains uncertain, this work aims at exploring its probable relatedness with the Phoenician script. Using tools from within topological data analysis and graph theory, the similarity between the two scripts is studied. The clustering of their letter shapes is performed based on the pairwise distances between their topological signatures. The ideas presented in this work can be extended to study the similarity between any two writing systems and as such can serve as the first step for linguists to determine the possibly related scripts before conducting further analysis.
    Źródło:
    Statistics in Transition new series; 2021, 22, 3; 141-156
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie topologicznej analizy gęstości elektronowej do opisu oddziaływań niekowalencyjnych
    The use of topological analysis of electron density in characterization of noncovalent interactions
    Autorzy:
    Bankiewicz, B.
    Rybarczyk-Pirek, A.
    Małecka, M.
    Domagała, M.
    Palusiak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/172723.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    Kwantowa teoria Atomów w Cząsteczkach
    QTAIM
    gęstość elektronowa
    analiza topologiczna
    wiązanie chemiczne
    oddziaływanie niekowalencyjne
    Quantum Theory of Atoms in Molecules
    electron density
    topological analysis
    chemical bonding
    noncovalent bonding
    Opis:
    All atomic and molecular properties are governed by an electron density distribution. Thus, the methods that deal with an analysis of the electron density distribution should have a particular appeal for chemists and help to understand the electron structure of molecules. The Quantum Theory of Atoms in Molecules gives the unique opportunity to have an insight into a region (e.g., an atom) of a given system (e.g. a molecule), delivering partitioning scheme which is defined explicitly within the rigorous quantum theory, from one side, and is applicable for experimentally available set of observables, from the other side. In that way QTAIM delivers a chemist a theoretical tool to study a small part of a molecule only, instead of dealing with the total energy of a whole system. In consequence, QTAIM has become one of the most powerful utilities of modern chemistry, forming a bridge between advanced theoretical and experimental techniques. In particular the properties of the electron density function in the so-called bond critical point (BCP, the (3, -1) saddle point on electron density curvature) seem to be valuable information for chemists, since it was proven in many papers that the chemical bonding can be characterized and classified on the basis of electron density characteristics measured in BCPs . In this review we firstly give a brief introduction to the theory, explaining most basic terms and dependences. In the main part of the review we discuss application of QTAIM in the qualitative and quantitative analysis of several various noncovalent interactions, focusing readers attention on such aspects as classification of interactions and interaction energy assessment. Both theoretical and experimental approaches are taken into account. We also discuss extensions of QTAIM to the analysis of the so called source function – the method which additionally enlarge interpretative possibilities of its parent theory. Finally, we give some examples which perhaps escape a rigorous QTAIM definition of chemical bonding. We acquaint the potential reader with arguments being pro- and against the QTAIM-based deterministic model of a chemical bond.
    Źródło:
    Wiadomości Chemiczne; 2014, 68, 5-6; 457-486
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On upper and lower strong quasi-uniform convergence of multivalued maps
    Autorzy:
    Dominik, I.
    Sochaczewska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/121841.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
    Tematy:
    konwergencja
    przestrzenie topologiczne
    funkcje matematyczne
    convergence
    convergence analysis
    topological spaces
    functions
    Opis:
    The concept of strong convergence of functions and multifunctions was introduced by I. Kupka, V. Toma and A. Sochaczewska. In this paper we consider new definitions of convergence for the nets of multifunctions – upper and lower strong quasi-uniform convergence.
    Źródło:
    Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2012, 17; 25-35
    2450-9302
    Pojawia się w:
    Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Shape and topology optimization of distributed parameter systems
    Autorzy:
    Sokołowski, J.
    Żochowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/206802.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    shape optimization
    topological derivative
    asymptotic analysis
    singularly perturbed geometrical domains
    asymptotic expansion of energ functional
    Opis:
    The energy functional for an elliptic boundary value problem in two spatial dimensions is considered. The variations of shape functional resulting from the small shape-topological domain perturbations with the holes and inclusions in elastic body are determined. The exact representation of solutions to the boundary value problem is exploited for the purposes of asymptotic analysis. To this end the perturbed solutions of the boundary value problem are Expressem as the minimizers of perturbed energy functionals. The proposed method of asymptotic analysis results in the double asymptotic expansions, with respect to the size of a hole and to the contrast parameter of an inclusion with respect to the matrix, of solutions to the boundary value problems as well as of the associated energy functional. The shape sensitivity analysis of the energy functional with respekt of the boundary variations of an inclusion is performed. The further asymptotic analysis allows for the limit passage with the size of inclusion to zero. In this way the topological derivative of the energy functional is obtained. The proposed analysis can be used in the shape and topology optimum design for elastic bodies governed by the stationary as well as by the time dependent elasticity boundary value problems in the framework of selfadjoint extensions of elliptic operators.
    Źródło:
    Control and Cybernetics; 2013, 42, 1; 217-226
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Topological derivative for linear elastic plate bending problems
    Autorzy:
    Novotny, A. A.
    Feijoo, R. A.
    Padra, C.
    Taroco, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/970132.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    pochodna topologiczna
    analiza wrażliwości kształtu
    sformułowanie wariacyjne
    zginanie płyty
    topological derivative
    shape sensitivity analysis
    variational formulation
    plate bending
    Opis:
    This study concerns the application of the Topological-Shape Sensitivity Method as a systematic procedure to determine the Topological Derivative for linear elastic plate bending problems within the framework of Kirchhoff's kinematic approach. This method, based on classical Shape Sensitivity Analysis, leads to a constructive procedure to obtain the Topological Derivative. Utilising the well known terminology of structural optimization, we adopt, the total potential strain energy as the cost function and the equilibrium equation as the constraint. Variational formulation as well as the direct differentiation method are used to perform the shape derivative of the cost function. Finally, in order to obtain a uniform distribution of bending moments in several plate problems, the Topological Derivative was approximated, by the Finite Element Method, and used to find the best place to insert holes. A simple hard-kill like topology algorithm, which furnishes satisfactory qualitative results in agreement with those reported in the literature, is also shown.
    Źródło:
    Control and Cybernetics; 2005, 34, 1; 339-361
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Topological derivatives for semilinear elliptic equations
    Autorzy:
    Iguernane, M.
    Nazarov, S. A.
    Roche, J. R.
    Sokolowski, J.
    Szulc, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/907655.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    optymalizacja kształtu
    pochodna topologiczna
    nierówność wariacyjna
    analiza asymptotyczna
    shape optimization
    topological derivative
    level set method
    variational inequality
    asymptotic analysis
    Opis:
    The form of topological derivatives for an integral shape functional is derived for a class of semilinear elliptic equations. The convergence of finite element approximation for the topological derivatives is shown and the error estimates in the L [...] norm are obtained. The results of numerical experiments which confirm the theoretical convergence rate are presented.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2009, 19, 2; 191-205
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A level set method in shape and topology optimization for variational inequalities
    Autorzy:
    Fulmański, P.
    Laurain, A.
    Scheid, J. F.
    Sokołowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/929713.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    optymalizacja kształtu
    pochodna topologiczna
    nierówność wariacyjna
    analiza asymptotyczna
    shape optimization
    topological derivative
    level set method
    variational inequality
    asymptotic analysis
    Opis:
    The level set method is used for shape optimization of the energy functional for the Signorini problem. The boundary variations technique is used in order to derive the shape gradients of the energy functional. The conical differentiability of solutions with respect to the boundary variations is exploited. The topology modifications during the optimization process are identified by means of an asymptotic analysis. The topological derivatives of the energy shape functional are employed for the topology variations in the form of small holes. The derivation of topological derivatives is performed within the framework proposed in (Sokołowski and Żochowski, 2003). Numerical results confirm that the method is efficient and gives better results compared with the classical shape optimization techniques.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2007, 17, 3; 413-430
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Logika miejsca i jej zastosowania w analizie niektórych rozumowań prawniczych
    Place logic and its possible applications in a logical analysis of legal reasoning
    Autorzy:
    Kozanecka-Dymek, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/1622189.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    topological logic
    place logic
    applications
    analysis
    legal language
    legal reasoning
    język prawniczy
    analiza
    zastosowania
    logika miejsca
    logika topologiczna
    rozumowania prawnicze
    Opis:
    The subject of the consideration contained in the article is topological logic interpreted as place logic and its possible applications in a logical analysis of legal reasoning. The first part of the article is about significance of widely understood spatial element in a law and about a role of formal logic in legal sciences (especially in dogmatic of law) and in legal discourse. There are also given conditions imposed on logical systems which can be applied to analyse legal reasoning. In the second part there is characterization of topological logic interpreted as place logic. In the third part there are examples of formalization of sentences of legal language and of legal inferences using symbols occurring in place logic. In the article there is shown that such kind of logic can be applied to logical analysis some reasoning conducted in legal language, specifically such reasoning in which there appear sentences including, in an explicit or a hidden way, phrase “in place”, that is, information about that, where certain events are realized.
    Źródło:
    Analiza i Egzystencja; 2016, 33; 51-68
    1734-9923
    2300-7621
    Pojawia się w:
    Analiza i Egzystencja
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of habitat conditions using Self-Organizing Feature Maps for reintroduction/introduction of Aldrovanda vesiculosa L. in Poland
    Autorzy:
    Kosiba, P.
    Mroz, L.
    Kaminski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/59210.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    assessment
    habitat condition
    Self-Organising Feature Map
    reintroduction
    introduction
    Aldrovanda vesiculosa
    Polska
    ecological modelling
    ecological restoration
    plant species
    water site
    rare plant
    statistical parameter
    cluster analysis
    topological map
    Opis:
    The study objects were Aldrovanda vesiculosa L., an endangered species and fifty five water sites in Poland. The aim of the present work was to test the Self-Organizing Feature Map in order to examine and predict water properties and type of trophicity for restoration of the rare plant. Descriptive statistical parameters have been calculated, analysis of variance and cluster analysis were carried out and SOFM model has been constructed for analysed sites. The results of SOFM model and cluster analysis were compared. The study revealed that the ordination of individuals and groups of neurons in topological map of sites are similar in relation to dendrogram of cluster analysis, but not identical. The constructed SOFM model is related with significantly different contents of chemical water properties and type of trophicity. It appeared that sites with A. vesiculosa are predominantly distrophic and eutrophic waters shifted to distrophicity. The elevated model showed the sites with chemical properties favourable for restoration the species. Determined was the range of ecological tolerance of the species in relation to habitat conditions as stenotopic or relatively stenotopic in respect of the earlier accepted eutrophic status. The SOFM appeared to be a useful technique for ordination of ecological data and provides a novel framework for the discovery and forecasting of ecosystem properties constituting a validation of the SOFM method in this type of studies.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2011, 80, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern methods for modelling and analysis of technological processes of car parts and their topological optimization
    Nowoczesne metody modelowania i analizy procesów technologicznych części samochodowych i ich optymalizacja topologiczna
    Autorzy:
    Kukiełka, L.
    Patyk, R.
    Kukiełka, K.
    Chodór, J.
    Lipiński, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/313431.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    car parts
    topological optimization
    technological processes
    metal forming
    surface layer
    modelling
    finite element method
    numerical analysis
    części samochodowe
    optymalizacja topologiczna
    procesy technologiczne
    obróbka plastyczna
    warstwa wierzchnia
    modelowanie
    metoda elementów skończonych
    Opis:
    Paper presents the problem of modelling and analysis of metalworking processes. Technological processes were considered as a geometrical, physical and thermal boundary and initial value problem, with unknown boundary conditions in the contact zone. An incremental model of the contact problem between movable rigid or thermo-elastic body (tool) and thermo-elastic/thermo-visco-plastic-phases body (object) in updated Lagrange formulation, for spatial states (3D) was considered. The incremental functional of the total energy and variational, non-linear equation of motion of object and heat transfer on the typical step time were derived. This equation has been discretized by finite element method, and the system of discrete equations of motion and heat transfer of objects were received. For solution of these equations the explicit or implicit methods was used. The applications were developed in the ANSYS/LS-Dyna system, which makes possible a complex time analysis of the states of displacements, strains and stresses, in the workpieces in fabrication processes. Application of this method was showed for examples the modelling and the analysis of burnishing rolling, thread rolling and turning processes. The numerical result were verified experimentally. The topic of topological optimization of car parts is also presented.
    W artykule przedstawiono problematykę modelowania i analizy numerycznej procesów technologicznych obróbki części samochodowych. Proces te rozpatrzono jako geometrycznie, fizycznie i cieplnie nieliniowe zagadnienie brzegowo-początkowe, z nieznanymi warunkami brzegowymi w obszarze kontaktu. Do opisu zjawisk nieliniowych, na typowym kroku przyrostowym, wykorzystano uaktualniony opis Lagrange'a, traktując narzędzie jako ciało sztywne lub termo-sprężyste natomiast przedmiot jako ciało termo-sprężyste/termo-lepko-plastyczne-fazowe. Równania ruchu obiektu i ciepła wyprowadzono wykorzystując rachunek wariacyjny. Otrzymane równania wariacyjne dyskretyzowano stosując aproksymację właściwą metodzie elementu skończonego. Dyskretne równania rozwiązano stosując jawne metody całkowania. Opracowano aplikacje w systemie ANSYS/LS-Dyna, które pozwalają na kompleksową analizę stanów przemieszczeń, odkształceń, naprężeń w dowolnym miejscu ciała i w dowolnej chwili realizacji procesu obróbki. Przedstawiono przykładowe wyniki obliczeń numerycznych stanów naprężeń i odkształceń wybranych procesów technologicznych: nagniatania, walcowania gwintów i toczenia. Wyniki obliczeń numerycznych weryfikowano eksperymentalnie. Przedstawiono również problematykę optymalizacji topologicznej części samochodowych.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 7-8; 343-351
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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