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    Wyświetlanie 1-7 z 7
    Tytuł:
    Suppression of vibration with optimal actuators and sensors placement
    Autorzy:
    Starek, L.
    Starek, D.
    Solek, P.
    Starekova, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/229841.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optimal location
    vibration suppression
    actuator
    sensor
    Opis:
    It is proposed to place the actuators to maximize the mean value of energy transmitted from or dissipated by the actuators, while the sensor location should maximize the mean square value of system output, which also maximizes the signal-to-noise ratio. By using explicit expressions for controllability and observability grammians as well as modal energies, it is shown that the approaches based on the system responses to transient and persistent disturbances are closely related, and are equivalent for structures which damping is small and the natural frequencies of which are well spaced. The method of actuator and sensor optimal location via grammians was proposed and compared it with results given by the method of matrix norms.
    Źródło:
    Archives of Control Sciences; 2010, 20, 1; 99-120
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An approach to the location of a warehouse distribution centre in the international environment: a Slovenian perspective
    Autorzy:
    Muha, R.
    Sever, D.
    Sokolovskij, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/135484.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    warehouse
    optimal location
    models
    approach
    trends
    case study
    Slovenia
    Opis:
    The article identifies the optimal location of the warehouse distribution centre for Slovenian companies in the international environment. The process of location selection takes into account a series of interconnected factors, including flows of goods between countries; the level of development of the transport system and transport infrastructure; the number of transport companies; labour costs and labour productivity; and the tax benefits existing in each country. Scientific literature mentions various methods for choosing a warehouse location, which differ in complexity and in the use of different qualitative and quantitative factors. However, the methods discussed have a disadvantage in that they use the current input variables when defining the optimal location. Choosing the optimal warehouse location is an important long-term logistics process, which should consider the fact that the environment in which companies operate is constantly changing. Using the proposed approach, future trends in the international environment are presented, which enables a better choice of warehouse location in the long run. Through this approach, companies can save on logistic costs, while also providing better quality logistics services. The analysis represents a starting point for deciding the location of a warehouse, but does not constitute a complete set of guidelines for companies to follow, as the choice of a particular location is dependent upon the complexity of the international environment in which a company operates.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 55 (127); 79-85
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Future of the European Logistics Centres as Nodal Objects of Intermodal Transport Infrastructure
    Autorzy:
    Lipińska-Słota, Alina
    Mindur, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/504337.pdf
    Data publikacji:
    2018
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    Europlatforms
    European logistics centres
    storage areas
    supply chains
    optimal logistic location
    Opis:
    The article describes the general characteristics of logistics centres. In particular, functions, types and characteristics of the model logistics centre were presented. The logistics centres associated in Europlatforms have been described, focusing on those countries where the number of centres is the largest, i.e. Germany, Spain, France and Italy. The factors determining the decision making regarding the selection of the optimal location of a logistics centre in Europe have been discussed, and also the places currently enjoying the greatest interest in the logistics industry have been shown. The development perspectives of Polish logistic facilities are presented and factors influencing the investment attractiveness of Poland are described.
    Źródło:
    Logistics and Transport; 2018, 38, 2; 41-52
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the location of the technological equipment on the chassis of the oil field aggregates
    Wyznaczenie najlepszego miejsca montażu urządzeń technologicznych na podwoziu pojazdów naprawczych na polach naftowych
    Autorzy:
    Hasanov, Ramiz
    Kazimov, Musa
    Powiązania:
    https://bibliotekanauki.pl/articles/2143284.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    oil and gas wells
    transport base
    vibration frequency
    oscillatory movements
    design
    optimal location
    technological
    equipment
    odwierty ropne
    odwierty gazowe
    baza transportowa
    częstotliwość wibracji
    ruch oscylacyjny
    projekt
    optymalne usytuowanie
    sprzęt technologiczny
    Opis:
    Currently, it is impossible to imagine the repair and drilling of any well without the use of modern mobile equipment. With technological progress, not only new development technologies in the branch of field exploitation appear, but also new equipment with which oil and gas wells are repaired and reconstructed. Today, oil production is mainly carried out by the operation of wells without a pumping derrick, which makes it possible to sharply reduce the cost of metal and funds. Operations of downhole equipment lifting and tripping in a well are carried out using self-propelled mobile units representing tracked or wheeled transport vehicles on which a derrick (mast) with a winch, transmission and hoisting system is mounted. Lifting units are equipped with a mechanism for raising the mast to the working position and lowering it to the transport position. Installations with a lifting capacity of up to 32 tons inclusive are designed for lifting operations during routine underground repair of wells, whereas over 32 tons minimal lift capacity are required during major repairs and well development. The mobile unit is subjected to oscillatory movements both during transportation along unpaved, semi - destroyed, muddy and snow-covered roads to the well (for development, repair), and during well drilling. The frequency of the oscillating movement depends on the state of the uneven road. The unevenness of the road is expressed by spectral functions. In this case, both the chassis and the body of the mobile unit, as well as the technological equipment located on it, are subjected to oscillatory movements. As a result, technological equipment, as well as devices and equipment located on it, lose their accuracy, which leads to accidents both during drilling and during operation. Therefore, in order to minimize the influence of oscillatory movements on the operability of technological equipment, a technique was developed for technological equipment positioning on the chassis of a mobile unit at an optimal scheme according to the proposed method.
    Obecnie nie można sobie wyobrazić naprawy i wiercenia otworów bez nowoczesnego sprzętu. Wraz z postępem technologicznym następuje nie tylko rozwój nowych technologii w zakresie eksploatacji złóż, ale także nowych urządzeń, za pomocą których dokonuje się napraw i rekonstrukcji odwiertów ropnych i gazowych. Obecnie wydobycie ropy naftowej odbywa się głównie poprzez eksploatację otworów bez wieży wydobywczo-obróbczej, co pozwala na znaczne obniżenie kosztów zakupu stali i innych nakładów finansowych. Operacje podnoszenia i zapuszczania wyposażenia wgłębnego w otworze wykonywane są za pomocą samobieżnych jednostek mobilnych, obejmujących gąsienicowe lub kołowe pojazdy transportowe, na których zamontowana jest wieża wiertnicza (maszt) z wciągarką, przekładnią i urządzeniem dźwigowym. Jednostki podnoszące wyposażone są w mechanizm podnoszenia masztu do pozycji roboczej i opuszczania go do pozycji transportowej. Instalacje o udźwigu do 32 ton włącznie przeznaczone są do operacji podnoszenia podczas bieżących napraw odwiertów, a powyżej 32 ton – do poważnych napraw i prac w odwiertach. Jednostka mobilna jest poddawana ruchom oscylacyjnym zarówno podczas transportu po nieutwardzonych, częściowo zniszczonych, błotnistych i zaśnieżonych drogach prowadzących do odwiertu (w celu wykonania prac, napraw), jak i podczas wiercenia otworu. Częstotliwość ruchu oscylacyjnego zależy od wysokości profilu nierówności drogi. Nierówności drogi wyrażają funkcje spektralne. W takim przypadku zarówno podwozie, jak i korpus jednostki mobilnej, a także usytuowane na niej wyposażenie technologiczne poddawane są ruchom oscylacyjnym. Powoduje to, że sprzęt technologiczny, jak również znajdujące się na nim urządzenia i wyposażenie tracą swoją precyzyjność, co prowadzi do wypadków zarówno podczas wiercenia, jak i podczas prac operacyjnych w odwiertach. Dlatego w celu zminimalizowania wpływu ruchów oscylacyjnych na sprawność urządzeń technologicznych opracowano technikę usytuowania urządzeń technologicznych na podwoziu jednostki mobilnej w optymalnym schemacie, zgodnie z proponowaną metodą.
    Źródło:
    Nafta-Gaz; 2022, 78, 4; 269-273
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rationale of the Optimal Location of Production: a System Approach
    Autorzy:
    Stadnicki, Jerzy
    Terebukh, Andrii
    Powiązania:
    https://bibliotekanauki.pl/articles/2172182.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    location of production
    system approach
    locally optimal place
    systemically optimal place
    space of possible location
    Opis:
    The optimal decision regarding the place of production is an essential, sometimes determining factor of its effectiveness. The main drawback in substantiating the optimal location of production is the lack of a system approach to accounting in the analysis of potential sales markets. Orientation, when justifying the optimal location of production, only to some particular sales market (and orientation to specific sales markets is necessary both in terms of taking into account the costs of moving the benefit from the place of production to the places of consumption, and in terms of production capacity, since it depends unit cost of production) is erroneous because it does not take into account many other competitive options. The article develops a system approach to rationale optimal locations and production capacity, based on a comparison of combinations of locally optimal places, the total production capacity of which is equal to the total (system) demand. The variant of combinations of locally optimal places with minimal total costs is systemically optimal. The result of solving the problem will be information about 4 parameters of the production of benefit: “where?” (in what places), “how much?” (in each of these places), “how?” (with what technology in each of these places), “for whom?” (sales markets for each of these places). The system approach proposed in the article to rationale the optimal location of the production of a single benefit can be adapted to a more complex situation, when the optimal location of the production of several benefits is justified at the same time. Further research is promising in the direction of a clearer determination of the boundaries of the space of possible location of production, as well as in the direction of studying the possibility of aggregating potential sales markets.
    Źródło:
    Management and Production Engineering Review; 2022, 13, 3; 110--117
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of multi-criteria decision making methods for the assessment of optimal SVC location
    Autorzy:
    Aydin, Faruk
    Gümüş, Bilal
    Powiązania:
    https://bibliotekanauki.pl/articles/2173650.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Borda count method
    FACTS
    MCDM
    optimal location
    PSAT
    voltage stability
    flexible alternating current transmission system
    power system analysis toolbox
    multi criteria decision making
    metoda liczenia Bordy
    podejmowanie decyzji wielokryterialnej
    lokalizacja optymalna
    stabilność napięcia
    elastyczne systemy przesyłowe prądu przemiennego
    narzędzia do analizy systemu zasilania
    Opis:
    The goal of multi-criteria decision making (MCDM) is to select the most appropriate of the alternatives by evaluating many conflicting criteria together. MCDM methods are widely available in the literature and have been used in various energy problems. The key problems studied in electrical power systems in recent years have included voltage instability and voltage collapse. Different flexible alternating current transmission systems (FACTS) equipment has been used for this purpose for decades, increasing voltage stability while enhancing system efficiency, reliability and quality of supply, and offering environmental benefits. Finding the best locations for these devices in terms of voltage stability in actual electrical networks poses a serious problem. Many criteria should be considered when determining the most suitable location for the controller. The aim of this paper is to provide a comparative analysis of MCDM techniques to be used for optimal location of a static VAR compensator (SVC) device in terms of voltage stability. The ideal location can be determined by means of sorting according to priority criteria. The proposed approach was carried out using the Power System Analysis Toolbox (PSAT) in MATLAB in the IEEE 14-bus test system. Using ten different MCDM methods, the most appropriate locations were compared among themselves and a single ranking list was obtained, integrated with the Borda count method, which is a data fusion technique. The application results showed that the methods used are consistent among themselves. It was revealed that the integrated model was an appropriate method that could be used for optimal location selection, providing reliable and satisfactory results to power system planners.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 2; art. no. e140555
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of the choice of technology within the spatial organization of production
    Autorzy:
    Stadnicki, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/322494.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    goods
    possible production sites
    location factor
    spatial competition of technology
    selection of optimal technologies
    towary
    możliwe miejsca produkcji
    czynnik lokalizacji
    konkurencja przestrzenna technologii
    wybór optymalnych technologii
    Opis:
    The main objective of the article was to improve the choice of the optimal variant of production technology by taking into account the factor of space. When selecting the optimal system of production technology for a specific good within the limits of a space, a two-stage procedure will be appropriate. The first stage consisting in the selection of technologies optimal for each site from a created list of possible production sites, which technologies, already assigned to a specific site, should be compared with each other by means of economic indicators - spatial competition of technology. The second stage will consist in the assessment, according to the criterion of market size, of those possible production sites already associated with the optimal production technology that were considered prospective in the first stage. Since different technologies can be optimal in different sites, the selection of the optimal production sites will also be the choice of the optimal technologies. In our opinion, this is the only way to guarantee the appropriate justification for the choice of optimal production technology systems for a specific good.
    Źródło:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2019, 136; 581-590
    1641-3466
    Pojawia się w:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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