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    Wyświetlanie 1-8 z 8
    Tytuł:
    Development and application of a decision making tool for fault diagnosis of turbocompressor based on Bayesian network and fault tree
    Autorzy:
    Lakehal, Abdelaziz
    Nahal, Mourad
    Harouz, Riad
    Powiązania:
    https://bibliotekanauki.pl/articles/406808.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    plant maintenance
    prioritization
    Bayesian networks
    fault tree
    diagnosis
    turbocompressor
    Opis:
    Fault Tree is one of the traditional and conventional approaches used in fault diagnosis. By identifying combinations of faults in a logical framework it’s possible to define the structure of the fault tree. The same go with Bayesian networks, but the difference of these probabilistic tools is in their ability to reasoning under uncertainty. Some typical constraints to the fault diagnosis have been eliminated by the conversion to a Bayesian network. This paper shows that information processing has become simple and easy through the use of Bayesian networks. The study presented showed that updating knowledge and exploiting new knowledge does not complicate calculations. The contribution is the structural approach of faults diagnosis of turbo compressor qualitatively and quantitatively, the most likely faults are defined in descending order. The approach presented in this paper has been successfully applied to turbo compressor, which represent vital equipment in petrochemical plant.
    Źródło:
    Management and Production Engineering Review; 2019, 10, 2; 16--24
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ageing PSA as a support for effective ageing management
    Autorzy:
    Berg, H. P.
    Volkanovski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069520.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    ageing
    ageing management
    probabilistic safety assessment
    prioritization
    management of activities
    Opis:
    Because of the growing operational age of nuclear power plants, the ageing management of structures, systems and components used in these plants is gaining an important role. Technical systems are subject to timedependent and operationally caused ageing phenomena with modifications of originally given characteristics and, thus, of relevance in terms of safety. Especially physical ageing is of importance. Therefore, a comprehensive ageing management is required. In the context of an integrated safety management it has to be shown how to integrate the safety related issues of ageing into probabilistic safety assessment (PSA). In particular the question is to be answered whether the effort for the execution of an ageing PSA is justified, in particular if the safety significant effects of ageing can be identified and quantitatively estimated. Method for prioritization of the components in the nuclear power plant considering implication of their ageing on safety of the nuclear power plant is presented. On the basis of an actual report on ageing management in German nuclear power plants and a literature survey, this paper tries to estimate the necessity and value for the introduction of an ageing PSA in Germany.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2014, 5, 2; 1--10
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bayesian graphical model based optimal decision-making for fault diagnosis of critical induction motors in industrial applications
    Autorzy:
    Lakehal, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200978.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    maintenance plan
    predictive actions
    prioritization
    critical asynchronous motor
    Bayesian approach
    Opis:
    In an effort to achieve an optimal availability time of induction motors via fault probabilities reduction and improved prediction or diagnostic tools responsiveness, a conditional probabilistic approach was used. So, a Bayesian network (BN) has been developed in this paper. The objective will be to prioritize predictive and corrective maintenance actions based on the definition of the most probable fault elements and to see how they serve as a foundation for the decision framework. We have explored the causes of faults for an induction motor. The influence of different power ranges and the criticality of the electric induction motor are also discussed. With regard to the problem of induction motor faults monitoring and diagnostics, each technique developed in the literature concerns one or two faults. The model developed, through its unique structure, is valid for all faults and all situations. Application of the proposed approach to some machines shows promising results on the practical side. The model developed uses factual information (causes and effects) that is easy to identify, since it is best known to the operator. After that comes an investigation into the causal links and the definition of the a priori probabilities. The presented application of Bayesian networks is the first of its kind to predict faults of induction motors. Following the results of the inference obtained, prioritizations of the actions can be carried out.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 467-476
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    How to Select a Location and a Design of Measures on Land Drainage – A Case Study from the Czech Republic
    Autorzy:
    Zajíček, Antonín
    Hejduk, Tomáš
    Sychra, Libor
    Vybíral, Tomáš
    Fučík, Petr
    Powiązania:
    https://bibliotekanauki.pl/articles/2086385.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    agricultural drainage
    main drainage facility
    water pollution
    prioritization
    design of measures
    revitalization
    Opis:
    A new approach for sites prioritization and designing measures on land drainage was developed and tested on the 96.5 km2 Žejbro catchment (Czech Republic). The aim was to design an effective, mutually interconnected system of measures, on tiles, manholes, outlets as well as on ditches (s.c. main drainage facilities, MDF) that will increase water retention and storage in intensively farmed and tile-drained catchments and will reduce water pollution from subsurface non-point sources (drainage runoff). This approach consists of (I) selecting suitable sites using the Catchment Measures Need Index (CAMNI) method; (II) obtaining information on land drainage in the area of interest; (III) conducting a field survey and water quality monitoring; (IV) designing appropriate systems of measures; and (V) analysing the estimated costs of the proposed measures. Measures were proposed for fourteen sub-catchments that were selected based on the results of a CAMNI analysis and whether an MDF or a heavily modified stream is present. A total of 44 point measures, 62 areal measures, and 99 line measures were proposed. Implementation of these measures would reduce the load of N-NO3, a major pollutant from drainage runoff, by 44 tons per year (48%). From the financial point of view, these measures are not self-financing and the benefits do not cover the expected costs of their implementation and maintenance. However, these measures have a profound ecological and societal benefits which, when taken into account, make these measures suitable for implementation when (co-)financed from public budgets. Putting the presented approach into practice, for example, in the framework of complex land consolidations or by watershed management authorities, could significantly improve the condition and water regime of intensively drained agricultural landscapes.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 4; 43--57
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Priorytetyzacja STEM w edukacji. Perspektywa aksjologiczno-teleologiczna
    Prioritization STEM education. An axiological and teleological perspective
    Autorzy:
    Grzesiak, Emilia
    Powiązania:
    https://bibliotekanauki.pl/articles/428403.pdf
    Data publikacji:
    2019
    Wydawca:
    Wydawnictwo Naukowe Chrześcijańskiej Akademii Teologicznej w Warszawie
    Tematy:
    STEM
    education
    prioritization
    significance
    social change
    economy
    development
    edukacja
    priorytetyzacja
    znaczenie
    zmiana społeczna
    ekonomia
    rozwój
    Opis:
    Contemporaneity is a time of constant changes, heterogeneous needs and growing commitments and aspirations. Transformations do not miss the educational system, which adapts to current needs, objectives and adopted social strategies. This article undertakes the subject of education in the fields of STEM. Areas from this group constitute attractive development directions – important from the point of view of the changing conditions of modern reality and potential chances for achieving stable and valuable work in the future. It presents the goals and the importance of STEM education in the context of the constantly changing socio-cultural reality based on current statistical data on the significance of investing in these areas of education and selected forms of popularizing STEM.
    Współczesność to czas ciągłych zmian, niejednorodnych potrzeb oraz rosnących zobowiązań i aspiracji. Transformacje dotyczą również systemu edukacyjnego, który dostosowuje się do aktualnych celów i przyjętych strategii społecznych. Niniejszy artykuł podejmuje temat edukacji STEM. Obszary z tej grupy stanowią atrakcyjne kierunki rozwoju – ważne z punktu widzenia zmieniających się warunków współczesnej rzeczywistości i potencjalnych szans na osiągnięcie stabilnej i wartościowej pracy w przyszłości. Przedstawione są w nim cele i znaczenie edukacji STEM w kontekście stale zmieniającej się rzeczywistości społeczno-kulturowej w oparciu o aktualne dane statystyczne uzasadniające ważność inwestowania w te obszary wiedzy, jak również prezentacja wybranych form popularyzacji edukacji STEM.
    Źródło:
    Studia z Teorii Wychowania; 2019, 4 (29); 167-184
    2083-0998
    2719-4078
    Pojawia się w:
    Studia z Teorii Wychowania
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prioritization of barriers to lean implementation in Indian automotive small & medium sized enterprises
    Autorzy:
    Tiwari, R. K.
    Tiwari, J. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/406822.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lean barriers
    prioritization
    Indian automotive SMEs
    confirmatory factor analysis
    multiple regression
    analytic network process
    super decision software
    Opis:
    Lean manufacturing has been the most deliberated concept ever since its introduction. Many organization across the world implemented lean concept and witnessed dramatic improvements in all contemporary performance parameters. Lean manufacturing has been a sort of mirage for the Indian automotive industry. The present research investigated the key lean barriers to lean implementation through literature survey, confirmatory factor analysis, multiple regression, and analytic network process. The general factors to lean implementation were inadequate lean planning, resource constraints, half-hearted commitment from management, and behavioral issues. The most important factor in the context of lean implementation in Indian automotive industry was inadequate lean planning found with the help of confirmatory factor analysis and multiple regression analysis. Further analysis of these extracted factors through analytic network process suggested the key lean barriers in Indian automotive industry, starting from the most important were absence of proper lean implementation methodology, lack of customer focus, absence of proper lean measurement system, inadequate capital, improper selection of lean tools & practices, leadership issues, resistance to change, and poorly defined roles & responsibilities. Though literature identifying various lean barriers are available. The novelty of current research emerges from the identification and subsequent prioritization of key lean barriers within Indian automotive SMEs environment. The research assists in smooth transition from traditional to lean system by identifying key barriers and developing customized framework of lean implementation for Indian automotive SMEs.
    Źródło:
    Management and Production Engineering Review; 2018, 9, 2; 69-79
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Proper, transparent and just prioritization policy as a challenge for national competition authorities and prioritization of the Slovak NCA
    Autorzy:
    Blažo, Ondrej
    Powiązania:
    https://bibliotekanauki.pl/articles/2159035.pdf
    Data publikacji:
    2020-12-18
    Wydawca:
    Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
    Tematy:
    Competition law
    EU law
    Slovakia
    prioritization
    parliamentary
    surveillance
    rejection of complaints
    credibility of NCA
    accountability of NCA
    Opis:
    The paper tries to establish some limits of the framework for prioritization policy in order to show that the NCAs are still bound by certain principles for setting their prioritization policies and are not completely independent or autonomous. In this context, priority setting by the Slovak NCA, surveillance of this process and evaluation of its credibility is analysed. The power to prioritize cases became a part of the ‘independence toolkit’ of the ECN+ Directive and is linked to effective use of limited resources. Despite including prioritization into the elements of independence of NCAs, the ECN+ Directive gives no further requirements for the prioritisation of the performance of enforcement powers of NCAs. Decisions regarding prioritization of enforcement can allow a NCA to focus on the most serious infringements of competition law. On the other hand, they can be challenged due to lack of transparency, arbitrariness, disproportionality and because of unequal treatment. Hence the prioritization policy, as well as individual decisions, shall be embedded into the framework safeguarding proper enforcement and due process of law. The legal framework of the European Commission for the system of rejection of cases as well as limited judicial review can serve as an inspiration for NCAs. Although NCAs are not restricted in the selection of their priorities, some competition infringements shall be inevitably included in their priorities, such as cartels and bid rigging. The case of Slovakia and its NCA shows a relatively low level of accountability of the Antimonopoly Office of the Slovak Republic (AMO) to the parliament, and judicial as well as parliamentary control of the prioritization and case selection of the AMO is limited.The paper concludes that within the reform of the Slovak NCA, it will be insufficient to only grant the AMO guarantees of independence, including independence of priority setting, and that mechanisms of accountability and review shall be evolved.
    L’article cherche à définir certaines limites du cadre de la politique de priorisation afin de montrer que les ANC sont liées par certains principes pour établir leurs politiques de priorisation et ne sont pas complètement indépendantes ou autonomes. Dans ce contexte, la définition des priorités par l’ANC slovaque, la surveillance de ce processus et l’évaluation de sa crédibilité sont analysées. Le pouvoir de hiérarchiser les affaires fait partie de la stratégie d’indépendance fixée par la directive ECN+ et est lié à l’utilisation efficace de ressources. Bien que la hiérarchisation fasse partie des éléments de l’indépendance des ANC, la directive ECN+ ne prévoit pas d’autres conditions pour la politique de prioritarisation des ANC. Les décisions concernant la hiérarchisation des mesures d’application peuvent permettre à une ANC de se concentrer sur les infractions les plus graves au droit de la concurrence. D’autre part, elles peuvent être critiquées en raison de leur manque de transparence, de leur caractère arbitraire, de leur disproportionnalité et de l’inégalité de traitement. Par conséquent, la politique de hiérarchisation des priorités doit être intégrée dans le cadre garantissant une application correcte et une procédure régulière de la loi. Le cadre juridique de la Commission européenne concernant le rejet des affaires ainsi que le contrôle judiciaire limité peut inspirer les ANC. Bien que les ANC ne soient pas limitées dans le choix de leurs priorités, certaines infractions à la concurrence doivent inévitablement être incluses dans leurs priorités, comme les ententes et les truquages d’offres. Le cas de la Slovaquie montre un niveau relativement faible de responsabilité de l’Office antimonopole de la République slovaque devant le Parlement, et le contrôle judiciaire et parlementaire de la définition des priorités et de la selection des affaires de l’Office est limité. L’article conclut que dans le cadre de la réforme de l’ANC slovaque, il ne suffira pas de garantir l’indépendance de l’AMO, y comprise la fixation des priorités, mais qu’il faudra faire progresser les mécanismes de responsabilité et de contrôle.
    Źródło:
    Yearbook of Antitrust and Regulatory Studies; 2020, 13, 22; 117-144
    1689-9024
    2545-0115
    Pojawia się w:
    Yearbook of Antitrust and Regulatory Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Doradztwo strategiczne – od koncepcji do wdrożenia. Aplikacja nowatorskiej metody MOST opartejna zastosowaniu teorii zbiorów rozmytych w zarządzaniu
    Strategy consulting – from concept to implementation. Application of the MOST, innovative method based on the fuzzy sets theory in management
    Autorzy:
    Chrostowski, Aleksander
    Czachorowski, Waldemar
    Powiązania:
    https://bibliotekanauki.pl/articles/956876.pdf
    Data publikacji:
    2015-09-15
    Wydawca:
    Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
    Tematy:
    strategia
    programy działania
    projekty
    priorytetyzacja
    metoda MOST
    logika rozmyta
    strategy
    action programs
    projects
    prioritization
    the MOST method
    fuzzy logic.
    Opis:
    W trakcie realizacji projektów doradczych dla organizacji, po fazie stworzenia koncepcji nadchodzi etap wyboru najważniejszych celów i programów działania. Wbrew pozorom nie jest to łatwe ani oczywiste, dlatego w trakcie realizacji tego typu prac na rzecz praktyki powstała i została przetestowana metoda zoperacjonalizowania strategii przy zastosowaniu logiki rozmytej, nazwana MOST. Artykuł ten, po pokazaniu implikacji teoretycznych metody, koncentruje się na konkretnych przykładach aplikacji. Pokazuje, w jaki sposób tworzyć portfel programów działania i/lub projektów, jak nadawać im priorytety i badać występujące zależności oraz spójność pomiędzy nimi.
    During the implementation of consulting projects for the organization after the stage of creating the concept, the next stage is to select the most important goals and programs of action. Contrary to appearances, this is not easy and obvious. Therefore in progress of this type of work for practitioners, the method of operationalized strategy was established and has been tested, using the fuzzy logic called MOST. This article, after showing the theoretical implications of this method, is focusing on selected examples of the application. It shows how to create a portfolio of work programs and/or projects to give them priorities and to examine existing dependencies and coherence of them.
    Źródło:
    Problemy Zarządzania; 2013, 3/2013 (43); 25 - 42
    1644-9584
    Pojawia się w:
    Problemy Zarządzania
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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