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    Tytuł:
    Mathematical modelling of the process of pipeline deformation through which gas-liquid mixtures with aggressive components are transported
    Autorzy:
    Oliynyk, A. P.
    Feshanych, L. I.
    Grygorchuk, G. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2172155.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    tense state
    pipeline
    viscous fluid flow
    dynamic viscosity
    Navier-Stokes equations
    gas mixture
    rurociąg
    lepkość dynamiczna
    równania Naviera-Stokesa
    mieszanka gazowa
    Opis:
    Purpose Mathematical modelling of the process of deformation of pipeline, transporting gas-liquid mixtures with aggressive components and a comparative analysis of the value of the specified velocity depending on the dynamic viscosity of the multicomponent gas mixture is conducted. Design/methodology/approach A mathematical model of the process of leakage of the transported product due to the loss of tightness of the pipe based on the system of Navier-Stokes equations with boundary conditions with considering the geometry of the leakage zones and the value of the leakage rate is implemented. Findings Models of the process of deformation of the pipeline due to displacements of a certain set of surface points by specifying different types of functions, describing the geometry of deformed sections are constructed. The method of calculating the tensely deformed state based on the data on the movement of surface points by comparing different ways of setting functions, taking into account the actual configuration of sections and axes is improved. The change of flow characteristics in the pipeline when changing the structure of the mix, transported by studying of influence of change of dynamic viscosity is investigated; The method of calculating the rate of leakage of the mixture in case of loss of tightness due to the occurrence of critical stresses in the pipe material is improved. Research limitations/implications Building a model of the deformation process, information about the nature, duration of forces and loads affecting the pipeline is not used. The law of the pipeline movement was constructed having taken into account the deformation of the sections in three directions. The necessity to take wind loads into account, estimating the real tensely deformed state was displayed. Practical implications Using the method of calculating the tensely deformed state based on the data on the movement of surface points by comparing different ways of setting functions, taking into account the actual configuration of sections and axes. Originality/value According to the computational algorithms created on the basis of the specified models, the calculations of the tense state of the pipelines and the flow rate of the mixture depending on its composition were performed. An analysis of the results of calculations - tense intensity and flow rate depending on the dynamic viscosity of the mixture is performed. The influence on the flow parameters - the flow rate of the mixture and the force of hydraulic resistance - changes in the dynamic viscosity of the mixture is analyzed.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2022, 111, 2; 57--63
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multilingualism and Dictionaries
    Autorzy:
    Sosnowski, Wojciech Paweł
    Koseska-Toszewa, Violetta
    Powiązania:
    https://bibliotekanauki.pl/articles/677069.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Slawistyki PAN
    Tematy:
    theoretical contrastive linguistics
    contrastive non-lexical and lexical semantics
    semantic categorisers
    syntactic categorisers
    state
    event
    net model of tense and aspect
    transitive/intransitive
    trilingual parallel corpus
    forms of address
    Opis:
    Multilingualism and DictionariesThe Russian-Bulgarian-Polish dictionary that we (Wojciech Sosnowski, Violetta Koseska-Toszewa and Anna Kisiel) are currently developing has no precedent as far as its theoretical foundations and its structure are concerned. The dictionary offers a unique combination of three Slavic languages that belong to three different groups: a West Slavic language (Polish), a South Slavic language (Bulgarian) and an East Slavic language (Russian). The dictionary describes semantic and syntactic equivalents of words between the languages. When completed, the dictionary will contain around 30,000 entries. The principle we build the dictionary on is that every language should be given equal status. Many of our data come from the Parallel Polish-Bulgarian-Russian corpus developed by us as part of the CLARIN-PL initiative. In the print version, the entries come in the order of the Cyrillic alphabet and they are not numbered (except for homonyms, which are disambiguated with Roman numbers). We selected the lemmas for the dictionary on the basis of their frequency in the corpus. Our dictionary is the first dictionary to include forms of address and most recent neologisms in the three languages. Faithful to the recent developments in contrastive linguistics, we begin with a form from the dictionary’s primary language and we define it in Polish. Subsequently, based on this definition, we try to find an equivalent in the second and the third language. Therefore, the meaning comes first and only then we look for the form (i.e. the equivalent) that corresponds to this meaning. This principle, outlined in Gramatyka konfrontatywna języków polskiego i bułgarskiego (GKBP), allows us to treat data from multiple languages as equal. In the dictionary, we draw attention to the correct choice of equivalents in translation; we also provide categorisers that indicate the meaning of verbal tenses and aspects. The definitions of states, events and their different configurations follow those outlined in the net model of verbal tense and aspect. The transitive vs. intransitive categorisers are vital for the languages in question, since they belong to two different types: synthetic (Bulgarian) and analytic (Polish and Russian). We predict that the equal status of every language in the dictionary will facilitate easier and faster development of an electronic version in the future.
    Źródło:
    Cognitive Studies; 2015, 15
    2392-2397
    Pojawia się w:
    Cognitive Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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