Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "design optimisation" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-26 z 26
    Tytuł:
    Genetic algorithm as a tool for multi-objective optimization of permanent magnet disc motor
    Autorzy:
    Cvetkovski, G.
    Petkovska, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/141012.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    design optimisation
    electric vehicle
    genetic algorithm
    multi-objective optimisation
    permanent magnet disc motor
    Opis:
    The analysed permanent magnet disc motor (PMDM) is used for direct wheel drive in an electric vehicle. Therefore there are several objectives that could be tackled in the design procedure, such as an increased efficiency, reduced iron weight, reduced copper weight or reduced weight of the permanent magnets (reduced rotor weight). In this paper the optimal design of PMDM using a multi-objective genetic algorithm optimisation procedure is performed. A comparative analysis of the optimal motor solution and its parameters in relation to the prototype is presented.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 2; 285-294
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Safety and reliability of complex industrial systems and process Poland-Singapore Joint Project
    Autorzy:
    Kołowrocki, K.
    Soszyńska, J.
    Xie, M.
    Kien, M. N.
    Salahuddin, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069710.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    safety
    reliability
    infrastructure systems
    decision modelling
    system optimisation
    design optimisation
    data mining
    maritime transport
    Opis:
    The project aims mainly to propose new and to develop existing methods, tools and software capable of supporting intelligent modelling and decision support systems, in controlling and optimising the safety and reliability of complex real industrial systems and processes, with their primarily applications in the maritime transportation sectors. Its main focus is on the use of new safety and reliability analysis techniques to improve and optimise safety and reliability of complex real industrial systems related to their operation processes. It will look into the design of industrial systems and development of new methods and the employment of new theoretical results that are applicable to designing and safety and reliability evaluations as well as the improvements of real complex industrial systems and processes.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2008, 2; 227--233
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Small Area Estimation in the German Census 2011
    Autorzy:
    Münnich, Ralf
    Burgard, Jan Pablo
    Gabler, Siegfried
    Ganninger, Matthias
    Kolb, Jan-Philipp
    Powiązania:
    https://bibliotekanauki.pl/articles/465802.pdf
    Data publikacji:
    2016
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    register-assisted census
    small area estimation
    design optimisation
    relative root mean squared error
    Opis:
    In 2011, Germany conducted the first census after the reunification. In contrast to a classical census, a register-assisted census was implemented using population register data and an additional sample. This paper provides an overview of how the sampling design recommendations were set up in order to fulfil legal requirements and to guarantee an optimal but still flexible source of information. The aim was to develop a design that fosters an accurate estimation of the main objective of the census, the total population counts. Further, the design should also adequately support the application of small area estimation methods. Some empirical results are given to provide an assessment of selected methods. The research was conducted within the German Census Sampling and Estimation research project, financially supported by the German Federal Statistical Office.
    Źródło:
    Statistics in Transition new series; 2016, 17, 1; 25-40
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on MDO of ship propulsion shafting dynamics considering the coupling effect of a propeller-shafting-hull system
    Autorzy:
    Liu, Jinlin
    Gu, Zheng
    Liu, Shuyong
    Powiązania:
    https://bibliotekanauki.pl/articles/32916294.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion shafting
    dynamic modelling
    shafting alignment
    shafting vibration
    multi-disciplinary design optimisation
    Opis:
    Dynamic designs for ship propulsion shafting can be categorised as complex multi-disciplinary coupling systems. The traditional single disciplinary optimisation design method has become a bottleneck, restricting the further improvement of shafting design. In this paper, taking a complex propulsion shafting as the object, a dynamic analysis model of the propeller-shafting-hull system was established. In order to analyse the coupling effect of propeller hydrodynamics on shafting dynamics, the propeller’s hydrodynamic force in the wake flow field was calculated as the input for shafting alignment and vibration analysis. On this basis, the discipline decomposition and analysis of the subdisciplines in design of shafting dynamics were carried out. The coupling relationships between design variables in the subdisciplines were studied and the Multi-disciplinary Design Optimisation (MDO) framework of shafting dynamics was established. Finally, taking the hollowness of the shaft segments and the vertical displacement of bearings as design variables, combined with the optimal algorithm, the MDO of shafting dynamics, considering the coupling effect of the propellershafting-hull system, was realised. The results presented in this paper can provide a beneficial reference for improving the design quality of ship shafting.
    Źródło:
    Polish Maritime Research; 2023, 1; 86-97
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid approach to design optimisation: Preserve accuracy, reduce dimensionality
    Autorzy:
    Kamola, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/911244.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    optymalizacja konstrukcji
    optymalizacja oparta na symulacji
    model zastępczy
    analiza awarii
    design optimisation
    simulation optimisation
    surrogate model
    analysis failure
    Opis:
    The paper proposes a design procedure for the creation of a robust and effective hybrid algorithm, tailored to and capable of carrying out a given design optimisation task. In the course of algorithm creation, a small set of simple optimisation methods is chosen, out of which those performing best will constitute the hybrid algorithm. The simplicity of the method allows implementing ad-hoc modifications if unexpected adverse features of the optimisation problem are found. It is postulated to model a system that is smaller but conceptually equivalent, whose model is much simpler than the original one and can be used freely during algorithm construction. Successful operation of the proposed approach is presented in two case studies (power plant set-point optimisation and waveguide bend shape optimisation). The proposed methodology is intended to be used by those not having much knowledge of the system or modelling technology, but having the basic practice in optimisation. It is designed as a compromise between brute force optimisation and design optimisation preceded by a refined study of the underlying problem. Special attention is paid to cases where simulation failures (regardless of their nature) form big obstacles in the course of the optimisation process.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2007, 17, 1; 53-71
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the outlet system parameters of a horizontal bulb pump unit on its performance characteristics
    Autorzy:
    Artsiamchuk, S. V.
    Sidorenko, G. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/175181.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pumping station
    bulb pump
    pump outlet system
    conjunction channel
    hydraulic laboratory
    performance tests
    design optimisation
    Opis:
    Results of an extensive experimental study conducted in eighties at the former Leningrad Polytechnic Institute are revised and analysed in context of some further research. The optimum length of straight outlet tubes with diffuser of circular cross-section and the outlet/inlet crosssectional area ratio are established. The optimum geometrical features of cranked type outlet tubes and the outlet tubes with diffuser cross-section transition from circular to square and rectangular ones are determined. Finally, the influence of the outlet conjunction channel slope on the pumping station efficiency is studied in detail.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2018, 139; 45-61
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A network design optimization problem for ro-ro freight transport in the Tyrrhenian area
    Autorzy:
    Fancello, Gianfranco
    Serra, Patrizia
    Mancini, Simona
    Powiązania:
    https://bibliotekanauki.pl/articles/374128.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    short sea shipping
    networks design optimisation
    Ro-Ro maritime services
    żegluga morska bliskiego zasięgu
    optymalizacja projektu sieci
    usługi morskie Ro-Ro
    Opis:
    Roll-on Roll-of (Ro-Ro) transport is one of the primary options EU policy is focusing on for developing intermodal transport and MOS initiatives, aimed at reducing road transport (especially trucks). In line with EU guidelines, this study proposes an integrated and optimized network scheme for the maritime Ro-Ro freight services currently operating in the Italian Tyrrhenian area to improve the overall supply of shipping services. The methodological approach used is based on the integration of the timetables and frequencies of existing freight shipping services using an original mathematical model that assigns demand flows to the network while trying to minimize a multi-objective function composed of a weighted sum of travel times and tariffs. Quantitative results show the positive impact generated by rescheduling and coordinating liner shipping and demonstrate how a ‘Tyrrhenian network system' considered as a whole would be more attractive than the single services taken collectively.
    Źródło:
    Transport Problems; 2019, 14, 4; 63-75
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement and optimisation of gyroplane performance
    Poprawa i optymalizacja osiągów wiatrakowca
    Autorzy:
    Stalewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/213009.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    rotorcraft performance
    gyroplane
    jump takeoff
    main rotor
    design and optimisation
    osiągi wiropłatów
    wiatrakowiec
    bezrozbiegowy start
    wirnik główny
    projektowanie i optymalizacja
    Opis:
    The aim of this study was to investigate possibilities of improving performance characteristics of light gyroplane, as well to propose new or improved solutions enhancing performance of this type of rotorcraft. The study has been conducted based on computational methods of Computational Fluid Dynamics, Flight Dynamics, Computer Aided Design and Optimisation. Results of the research confirm that using advanced computational methods it is possible to improve significantly the performance characteristics of light gyroplane. It can be chieved both through optimisation of the main rotor design and flight control strategy. An unconventional approach to rotorcraft optimisation has been presented, distinguishing by the fact that the objective was calculated based on computer imulations of selected states of gyroplane flight. One of the optimised main rotors had already been examined during flight tests, which confirmed its good performance‑and‑exploitation properties and its advantage over classic gyroplane rotors. Developed by the author the family of gyroplane airfoils is a valuable alternative to classic airfoils utilised so far. The same applies to the blades built based on those airfoils. In particular, it concerns the unconventional design of the rotor blade of span-variable: chord and relative thickness. The developed methodology of numerical optimisation of flight‑control strategy during the jump takeoff of the gyroplane presents an original approach to those problems and may be valuable tool supporting gyroplane-pilot training.
    Celem pracy było zbadanie możliwości poprawy właściwości eksploatacyjnych lekkiego wiatrakowca, jak również zaproponowanie nowych lub ulepszonych rozwiązań zwiększających osiągi tego typu wiropłatów. Prace badawcze przeprowadzono w oparciu o metody Obliczeniowa Mechaniki Płynów, Mechaniki Lotu, Komputerowego Wspomagania Projektowania i Optymalizacji Inżynieryjnej. Wyniki zrealizowanych badań potwierdzają, że przy użyciu zaawansowanych metod obliczeniowych można znacznie poprawić właściwości osiągowe lekkiego wiatrakowca. Można to osiągnąć zarówno poprzez optymalizację konstrukcji wirnika nośnego jak i poprzez optymalizację strategii kontroli lotu wiatrakowca. Przedstawiono niekonwencjonalne podejście do optymalizacji wiropłatów, wyróżniające się tym, że funkcja celu była obliczana na podstawie komputerowej symulacji wybranych stanów lotu wiatrakowca. Jeden z nowo zaprojektowanych wirników został już przetestowany podczas prób w locie, które potwierdziły jego dobre osiągi i właściwości eksploatacyjne oraz przewagę tego wirnika nad konstrukcjami klasycznymi. Opracowana przez autora rodzina dedykowanych profili wiatrakowcowych stanowi konkurencyjną alternatywę w stosunku do klasycznych profili aerodynamicznych stosowanych zazwyczaj do konstrukcji łopat wiatrakowca. To samo odnosi się do łopat wirnika nośnego zbudowanych w oparciu o nowo zaprojektowane profile. W szczególności dotyczy to konstrukcji niekonwencjonalnych łopat wirnika charakteryzujących się zmiennymi wzdłuż rozpiętości: cięciwą i względną grubością przekrojów łopaty. Opracowana metodologia numerycznej optymalizacji strategii kontroli lotu podczas bezrozbiegowego startu wiatrakowca, prezentuje oryginalne podejście do tego typu problemów i może stanowić cenne narzędzie wspomagające proces szkolenia pilotów wiatrakowców.
    Źródło:
    Prace Instytutu Lotnictwa; 2017, 4 (249); 103-122
    0509-6669
    2300-5408
    Pojawia się w:
    Prace Instytutu Lotnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Greedy randomised adaptive search procedures for topological design of MPLS networks
    Autorzy:
    Mysłek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/309269.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    network design
    optimisation
    MPLS
    GRASP
    local search
    Opis:
    In this paper, the IP/MPLS network cost optimisation problem of selecting localisation of nodes and links, combined with link's dimensioning, is discussed. As the considered problem is hard, we discuss and propose greedy randomised adaptive search procedure (GRASP) based solution method. GRASP is an iterative randomised sampling technique which combines adaptive randomised greedy function in constructing initial solution with local search optimisation. The effectiveness of the method is illustrated by means of a numerical study. We compare the GRASP results with results for both exact and heuristic methods obtained in previous research concerning topological design problem.
    Źródło:
    Journal of Telecommunications and Information Technology; 2002, 2; 26-32
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A generative approach to hull design for a small watercraft
    Autorzy:
    Karczewski, Artur
    Kozak, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/32917891.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    method
    generative design
    yacht
    optimisation
    genetic algorithm
    Opis:
    In the field of ocean engineering, the task of spatial hull modelling is one of the most complicated problems in ship design. This study presents a procedure applied as a generative approach to the design problems for the hull geometry of small vessels using elements of concurrent design with multi-criteria optimisation processes. Based upon widely available commercial software, an algorithm for the mathematical formulation of the boundary conditions, the data flow during processing and formulae for the optimisation processes are developed. As an example of the application of this novel approach, the results for the hull design of a sailing yacht are presented.
    Źródło:
    Polish Maritime Research; 2023, 1; 4-12
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new method for a preliminary definition of a high–performance rudder for tuna purse seiners
    Autorzy:
    Martínez–López, A.
    Munín–Doce, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259135.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    rudder optimisation
    vessel manoeuvrability
    tuna vessel design
    Opis:
    The aim of this paper is to provide a simple method for the definition of a rudder for tuna purse seiners. The model achieved by the application of this method ensures the manoeuvrability of initial turning, course keeping and yaw checking. For this, the results obtained by other authors, through rudder tests and manoeuvrability tests of fishing vessels have been integrated with the recommendations of the International Normative. Finally, in the paper the method is applied to the case of a tuna vessel, providing a rudder model which could be optimised with CFD (Computer Fluid Dynamics) in further tests. The method proposed can be applied to other vessels whose main dimensions are met.
    Źródło:
    Polish Maritime Research; 2012, 3; 26-35
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Main Particulars Optimisation of a Sea-Going Ferry for a Given Shipping Route
    Autorzy:
    Artyszuk, Jarosław
    Gucma, Stanisław
    Powiązania:
    https://bibliotekanauki.pl/articles/504240.pdf
    Data publikacji:
    2015
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    ferry
    ro-pax
    design
    optimisation
    ship manoeuvring
    simulation
    Opis:
    The paper presents a two-stage optimisation approach of sea-going ferry main particulars intended for a particular route. The method is especially suited for determining owner's specific design requirements. The goal of the first stage is a maximisation of cargo capacity, mostly in terms of the total lane length. Empirical method based on the fleet statistics of existing ferries is used throughout the stage one. The objective function of the second stage are the capital and service costs of a ferry, which are to be minimised. The solution of the latter optimisation will essentially involve a ship manoeuvring motions simulation.
    Źródło:
    Logistics and Transport; 2015, 25, 1; 57-62
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heuristic algorithms in topological design of telecommunication networks
    Autorzy:
    Karaś, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/307692.pdf
    Data publikacji:
    2003
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    topological design
    network optimisation
    heuristic algorithms
    genetic algorithms
    Opis:
    The paper addresses the generic topological network design problem and considers the use of various heuristic algorithms for solving the problem. The target of the optimisation is to determine a network structure and demand allocation pattern that would minimise the cost of the network, which is given by fixed installation costs of nodes and links and variable link capacity costs described bv linear or concave functions. Input data for the optimisation consists of a list of potential node and link locations and their costs and a set of demands defined between the nodes. Since the problem is known to be NP-hard. The use of specialised heuristic algorithms is proposed. The presented approaches encompass original ideas as well as selected methods described in literature and their enhancements. The algorithms are based on the following ideas and methods: shifting of individual flows, local and global restoration of flows from chosen links or nodes, Yaged algorithm for finding local minima, Minoux greedy algorithm, simulated allocation and genetic algorithms. Efficiency of each of the proposed methods is tested on a set of numerical examples.
    Źródło:
    Journal of Telecommunications and Information Technology; 2003, 3; 73-82
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kriging based robust optimisation algorithm for minimax problems in electromagnetics
    Autorzy:
    Li, Y.
    Rotaru, M.
    Sykulski, J. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/141299.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    worst-case optimisation
    minimax problems
    kriging
    robust design
    Opis:
    The paper discusses some of the recent advances in kriging based worst-case design optimisation and proposes a new two-stage approach to solve practical problems. The efficiency of the infill points allocation is improved significantly by adding an extra layer of optimisation enhanced by a validation process.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 4; 843-854
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and optimisation of exhaust system of light turboprop airplane
    Autorzy:
    Stalewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/247804.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    turboprop aircraft
    exhaust system
    ejector
    computer-aided design
    optimisation
    Opis:
    Innovative exhaust system for light turboprop airplane has been developed and optimised. Apart from the basic function of removing exhaust from turboprop engine, the system supports cooling of the engine bay. To do this, the system removes hot air from the engine bay, utilising the ejector-pump effect, where the exhaust stream generates under-pressure, sucking the hot air through the ejector slot and removes the air together with the exhaust gases. The design and optimisation of the exhaust system has been conducted based on computational methods of Computer-Aided Design and Optimisation and Computational Fluid Dynamic. Three-dimensional analysis of flow around the airplane (including effect of propeller) and inside the exhaust system was conducted by application of URANS solver ANSYS FLUENT. Using these software the trajectories of exhaust particles, both inside the exhaust ducts and outside the airplane, have been determined. Parametric model of the designed exhaust system has been developed using the in-house software PARADES. As design parameters the diameter, length and direction of exhaust ducts as well as few parameters describing a shape of the ejector, have been established. The optimisation process aimed at designing of the exhaust system, which removes the exhaust gases possibly far away from the airframe, especially during a descent flight of the airplane. Additional objectives were maximisation of the mass flow rate of hot air sucked through the ejector and minimisation of the drag force generated by external part of the exhaust system. The optimised exhaust system should have also fulfilled requirements of permissible total-pressure losses inside the exhaust ducts. The optimised exhaust system has been implemented on the light turboprop airplane and validated during flight tests.
    Źródło:
    Journal of KONES; 2016, 23, 2; 341-348
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability criteria as constraints in a fleet of ships optimisation problem
    Autorzy:
    Oleksiewicz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/962812.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    maritime transportation
    computer-aided ship design
    optimisation
    intact stability criteria
    Opis:
    The paper has been written within the European EUREKA Project E!2772, initiated and completed at the Faculty of Ocean Engineering & Ship Technology, Gdansk University of Technology in the years 2001-2003. A problem has been solved concerning mathematical optimisation of a fleet of multipurpose sea-river vessels for European short-shipping reguIlar lines, in the area of The North and Baltic Seas, on the level of marine transportation , task, by the non-linear programming methods with constraints. A method is proposed which enables existing criteria of stability to be included as constraints in the optimisation model of a jleet. In the numerical examples, three typical criteria of intact stabiliry: by IMO, PRS, and HSMB have been selected to demonstrate a post-optimisation feasibility analysis of principal parameters of ships.
    Źródło:
    Polish Maritime Research; 2004, S 1; 39-53
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and optimisation of main rotor for ultralight helicopter
    Autorzy:
    Stalewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/243641.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    rotorcraft
    ultralight helicopter
    main rotor
    airfoil
    computer-aided design
    optimisation
    Opis:
    A modern main rotor, dedicated to the ultralight helicopter, has been designed and optimised. Due to assumed simplicity of the rotor design and taking into account some technological constraints, the principal purpose of the presented research was to design a dedicated airfoil which, when applied on the main-rotor blades, would influence satisfactory improvement in a performance of the ultralight helicopter, especially in fast flight. The design and optimisation process has been supported by a computational methodology. The in-house software has been used for direct and inverse design of shapes of the rotor-blade airfoils. Aerodynamic properties of the airfoils as well as the helicopter main rotor were evaluated based on both the two-dimensional and three-dimensional flow simulations conducted using the ANSYS FLUENT software that was used to solve U/RANS equations. Based on the results of conducted computational simulations of fast flight of the ultralight helicopter, it can be concluded that the newly designed main rotor, compared to the baseline, may give certain improvement in helicopter performance in fast flight. In addition, the application of this newly designed rotor may lead to increase of a maximum speed of the helicopter flight, due to the greater lift force achievable by this rotor on the retreating blade, which is favourable from point of view of keeping of a lateral balance of the helicopter in fast flight.
    Źródło:
    Journal of KONES; 2017, 24, 4; 287-295
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computational design and optimisation of innovative, high-efficiency wind turbine
    Autorzy:
    Stalewski, W.
    Zalewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/246604.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    green power
    wind turbine
    computational fluid dynamics (CFD)
    computer-aided design
    optimisation
    Opis:
    New concept of innovative, high-efficiency wind turbine has been developed and optimised. The turbine consists of a rotor with a vertical axis of rotation and a ring-palisade casing, which task is to deflect wind stream so that it flows perpendicularly to the rotor plane. The main advantage of such configuration of a wind turbine is that due to the vertical axis of symmetry, it works independently on the wind direction and it does not need any mechanism directing it towards the wind. The greatest challenge when designing the turbine was to minimise losses of energy of the wind stream deflected by 90 degrees by the ring vanes of the casing. This involved optimisation of number, shapes and mutual positions of the ring vanes. The whole optimisation works were done based on computational methods of Computer-Aided Design and Optimisation and Computational Fluid Dynamic. Subsequent variants of the ring-palisade casing were designed using an appropriately adapted in-house-software package supporting design and optimisation of multi-element airfoils. Three-dimensional analysis of flow around and inside the casing was conducted by application of commercial URANS solver ANSYS FLUENT. Eventually designed turbine is characterised by high efficiency in respect of acceleration of the wind stream. On the basis of computer simulations, it is estimated that the average velocity of air stream flowing through the rotor plane may be higher than the wind speed by about 45%. Extent of the acceleration of the wind stream partially depends on the number of ring vanes comprising a casing. Depending on specificity of application, this number of ring vanes may be chosen by a compromise between performance and dimensions of the turbine. The proposed wind turbine seems to be very promising solution, especially within the area of small and moderate renewable-energy sources, which in particular may be placed directly in residential-building areas, e.g. on the roofs of houses. This type of renewable-energy sources may also be successfully used in the field of environmentally friendly transport, in the process of producing hydrogen as fuel for fuel cell vehicles.
    Źródło:
    Journal of KONES; 2015, 22, 2; 221-232
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graph Theory Approach to Transportation Systems Design and Optimization
    Autorzy:
    Guze, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/117201.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    graph theory
    Transportation System
    Transportation System Design
    Transportation Systems Optimization
    SPEA Algorithm
    Pareto optimal
    Multicriteria Optimisation
    optimization
    Opis:
    The main aim of the paper is to present graph theory parameters and algorithms as tool to analyze and to optimise transportation systems. To realize these goals the 0-1 knapsack problem solution by SPEA algorithm, methods and procedures for finding the minimal spanning tree in graphs and digraphs, domination parameters problems accurate to analyse the transportation systems are introduced and described. Possibility of application of graph theory algorithms and parameters to analyze exemplary transportation system are shown.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8 no. 4; 572-578
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of interior design on wellness – eye tracking analysis in determining emotional experience of architectural space. A survey on a group of volunteers from the Lublin region, Eastern Poland
    Autorzy:
    Tuszyńska-Bogucka, W.
    Kwiatkowski, B.
    Chmielewska, M.
    Dzieńkowski, M.
    Kocki, W.
    Pełka, J.
    Przesmycka, N.
    Bogucki, J.
    Galkowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085475.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    supportive design
    healing environment
    emotional significance of space
    optimisation of treatment conditions
    eye tracking in medical research
    Opis:
    Introduction and objective. Using the concepts of Ulrich’s theory of supportive design and Malkin’s healing environment, an eye tracking experiment was designed in order to measure respondents’ reactions while looking at visualisations of various interiors, with the aim of verifying whether certain parameters of an interior are related to emotional reactions in terms of positive stimulation, and the sense of security and comfort. Materials and method. 12 boards were designed, incorporating standard features of an interior, i.e. (1) proportions, (2) lighting, (3) colour scheme of a room, as well as (4) the colours and spatial arrangement of furnishings. Respondents’ reactions were recorded with an eye tracker Tobii TX300 and supplemented by self-descriptions of emotional reactions. Results. The results showed that the varying spatial and colour arrangements presented in the interior visualisations provoked different emotional responses, confirmed by pupil reaction parameters, as measured by the eye tracking device. Conclusions. Architectural space can have a diverse emotional significance and impact on an individual’s emotional state. This is an important conclusion from the point of view of optimising and creating the so-called supportive and healing environment. The results have implications for the interpretation of the pupil diameter as an index of emotional reactions to different architectural space visualisations. Testing the eye tracker as a method helpful in diagnosing the emotional reactions to features of the interior is justified, and can provide an effective tool for early diagnosis of the impact of architectural space on the well-being of individuals. It can also be a good form of testing the emotional significance of architectural designs before they are implemented.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 113-122
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inverse Problem of Textile Material Design at Low Temperature Solved by a Hybrid Stochastic Algorithm
    Rozwiązanie problemu inwersyjnego projektowania materiałów włókienniczych stosowanych w niskich temperaturach za pomocą hybrydowego algorytmu stochastycznego
    Autorzy:
    Weng, M
    Xu, D
    Zhou, X
    Powiązania:
    https://bibliotekanauki.pl/articles/232769.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    inverse problem
    textile design
    hybrid stochastic algorithm
    optimisation method
    problem inwersyjny
    projektowanie tkanin
    hybrydowy algorytm stochastyczny
    metody optymalizacji
    Opis:
    The inverse problem of textile material design (IPTMD) aims to determine textile materials with optimum thermal conductivities for the thickness designed in terms of the thermal comfort requirements of the wearer. In this paper, an IPTMD is presented on the basis of the physical nature of steady heat and moisture transfer in a human body-clothing-environment system. A globally convergent algorithm, the modified particle collision algorithm (MPCA), is proposed and its validity is verified. The MPCA is applied to solve the IPTMD for single-layer textile materials at low temperature. Numerical simulation results of the IPTMD proved the suitability of the IPTMD and effectiveness of the MPCA in solving complex global optimisation problems. The encouraging results indicate that the modelling method above and optimisation algorithm can be used for further applications.
    Problem inwersyjny projektowania materiałów włókienniczych ma na celu określenie materiałów włókienniczych z optymalną przewodnością cieplną dla grubości zaprojektowanej z uwzględnieniem komfortu termicznego i wygody użytkownika. W pracy przedstawiono problem na podstawie stałego przepływu ciepła i wilgotności pomiędzy ciałem człowieka, odzieżą a środowiskiem zewnętrznym. Zaprezentowano i zweryfikowano prawidłowość algorytmu zbieżnego, algorytmu zderzenia cząstek modyfikowanych, który jest stosowany w celu rozwiązania problemu dla jednowarstwowych materiałów włókienniczych w niskich temperaturach. Wyniki symulacji numerycznych problemu dowodzą jego przydatności i skuteczności algorytmu w rozwiązywaniu złożonych problemów optymalizacji. Zachęcające rezultaty wskazują, że powyższy sposób modelowania i algorytm optymalizacji mogą być używane do różnych zastosowań.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2015, 2 (110); 40-43
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new simulation-optimization approach for the circulation facilities design at urban rail transit station
    Autorzy:
    Khattak, A.
    Jiang, Y.
    Zhu, J.
    Hu, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/223467.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    urban rail transit station
    facilities design
    genetic algorithm
    simulation optimisation
    stacja transportu miejskiego
    projektowanie obiektów
    algorytm genetyczny
    symulacja optymalizacji
    Opis:
    Width design of the urban rail transit stations circulation facilities is a vital issue. The existing width design approach failed in fully considering the essential factors such as fluctuation in passengers’ arrival process, fluctuation and state-dependence in passengers walking speed and the blocking when passengers’ demand exceeds the capacity of facilities. For this purpose, a PH-based simulation-optimization approach is proposed that fully considers the fluctuation, the state-dependence, Level of Service (LOS) and blocking effect. This novel approach provides automatic reconfiguration of the widths of circulation facilities by a concurrent implementation of a PH-based Discrete-Event Simulation (DES) model and the Genetic Algorithm (GA). The proposed PH-based simulation-optimization approach and the existing design approaches based on the exponential and deterministic models are applied to design the widths of circulation facilities. The results reveal that the circulation facilities designed by the proposed approach have larger widths. Similarly, increase in the SCV of arrival interval results in increasing the widths designed by the proposed approach increase while the widths of the other two approaches stay the same. The width designed of the proposed approach increase at faster rate than that of the other two approach when the passengers’ arrival rate increases.
    Źródło:
    Archives of Transport; 2017, 43, 3; 69-90
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facility layout design – review of current research directions
    Autorzy:
    Kikolski, M.
    Ko, Ch.-H.
    Powiązania:
    https://bibliotekanauki.pl/articles/125595.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    facility layout
    production line design
    production optimisation
    workplace planning
    układ obiektu
    projekt linii produkcyjnej
    optymalizacja produkcji
    planowanie miejsca pracy
    Opis:
    The article discusses the topic of designing the optimal distribution of workstations within a production plant. A review focused on publications on this subject in the Scopus database, covering the years 1975–2017. The article presents a facility layout problem and basic principles of optimisation methods for the distribution of workstations within the factory. The author proposes a methodology for designing the optimal distribution of workstations using available optimisation methods and computer simulation. Also, directions for further research are indicated.
    Źródło:
    Engineering Management in Production and Services; 2018, 10, 3; 70-79
    2543-6597
    2543-912X
    Pojawia się w:
    Engineering Management in Production and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda rozmieszczania urządzeń pomiarowych i wykonawczych do celu diagnozowania wycieków w sieciach wodociągowych
    Sensor and actuator placement for leakage diagnosis in water distribution systems
    Autorzy:
    Przystałka, P.
    Wyczółkowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/257486.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    sieć wodociągowa
    optymalizacja wielokryterialna
    optymalne planowanie eksperymentów
    przeszukiwanie systematyczne
    algorytmy genetyczne
    urban water networks
    multiobjective optimisation
    optimal design of experiments
    systematic search
    genetic algorithms
    Opis:
    W artykule opisano metodę określania konfiguracji czujników przepływu oraz reduktorów ciśnienia, optymalnej ze względu na działanie systemu detekcji i lokalizacji wycieków pojawiających się w sieciach wodociągowych. Metoda optymalizacji w głównej mierze opiera się na algorytmie przeszukiwania systematycznego oraz algorytmie genetycznym. W obu przypadkach funkcję celu/przystosowania utworzono na bazie miar wrażliwościowych oraz z zastosowaniem ogólnej teorii optymalnego planowania eksperymentów. Przeprowadzone badania weryfikacyjne potwierdziły poprawność zaproponowanego rozwiązania oraz jego przydatność praktyczną.
    The paper deals with a method for configuring flow meter locations and reducing valve set-up points. These positions are optimal for acquiring information that is needed for fault detection and locating small leakage points in water distribution systems. The method is based on systematic search and genetic algorithms. For both approaches, the objective/fitness function was created with the use of sensitivity measures and optimal experimental design criterions. The verification of the delineated approach was conducted for a real-world water supply network. The achieved results confirmed the correctness of the proposed method.
    Źródło:
    Problemy Eksploatacji; 2011, 2; 141-151
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oilfield development and operations planning under geophysical uncertainty
    Autorzy:
    Redutskiy, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/125572.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    development and production planning
    electrical submersible pump
    multi-stage stochastic programming
    oilfield infrastructure design
    oilfield operations optimisation
    strategic planning
    planowanie produkcji
    zatapialna pompa elektryczna
    wielostopniowe programowanie stochastyczne
    projektowanie infrastruktury naftowej
    optymalizacja operacji naftowych
    planowanie strategiczne
    Opis:
    The oil and gas industry nowadays is challenged by dealing with nonconventional reserves and offshore environments. Decision-making associated with projects in the petroleum sector has to handle various technological issues, risks, and uncertainty. The Smart Fields approach was introduced to cope with complicated production conditions and make the production of hydrocarbons economically efficient. A significant part of this approach is proactive planning which implies taking into account the uncertainty, or lack of knowledge of the recoverable reserves, future hydrocarbon prices and various operational issues inherent in the projects. In this study, a multi-stage stochastic programming approach is employed to cover the relevant engineering issues of oilfield development and petroleum production while addressing the geophysical uncertainty related to the developed deposit. The proposed model covers such aspects as well drilling, gathering pipeline infrastructure planning, capacity selection for the infrastructure and the processing units, as well as planning the production operations with consideration of artificial lift efficiency. The model aims to optimise the entire field lifecycle, given the chosen planning criterion, that is an economic criterion of the project’s net present value. The contribution of the developed model to the area of planning in the petroleum industry is the detailed consideration of the technology: the flows and pressures in the planned infrastructure, reservoir behaviour, and the artificial lift performance. The goal of including these technological details is to apprehend the economic tradeoff between investments, operating costs and the prospective revenues, given the lack of knowledge of the geophysical properties of the developed deposit. The stochastic modelling implemented in this study is relevant to the development projects in nonconventional environments, where several deposits of various sizes are present; however, not each deposit's properties get to be studied in detail.
    Źródło:
    Engineering Management in Production and Services; 2017, 9, 3; 10-27
    2543-6597
    2543-912X
    Pojawia się w:
    Engineering Management in Production and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design parameters optimisation of ROPAX ferry using seakeeping characteristics and additional wave resistance
    Optymalizacja parametrów projektowych promu pasażersko-samochodowego pod kątem wybranych właściwości morskich i dodatkowego oporu na fali
    Autorzy:
    Cepowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/257284.pdf
    Data publikacji:
    2008
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    właściwości morskie
    prom ro-ro
    kołysanie boczne
    przyspieszenie poprzeczne
    dodatkowy opór na fali
    parametry projektowe
    sztuczna sieć neuronowa
    optymalizacja wielokryterialna
    metoda Pareto
    logika rozmyta
    sea-keeping
    ro-pax ferry
    rolling
    motion sickness index
    additional wave resistance
    design parameters
    artificial neuron network
    optimisation
    Pareto method
    fuzzy logic
    Opis:
    This paper presents the multi-criteria design parameters of the optimisation of the ROPAX ferry using sea-keeping characteristics and additional wave resistance. The design criteria were formed using the method based on deterministic scenario and the partial objective functions were determined as artificial neuron networks. The design parameters' optimisation was carried out with the Pareto method. The best design variants were chosen using the elements of fuzzy logic that allowed, among other things, to present design quality with linguistic variables. This approach allowed choosing the best variant concerning all criteria at the same time.
    W artykule przeprowadzono wielokryterialną optymalizację parametrów projektowych promu pasażersko-samochodowego pod kątem wybranych właściwości morskich i dodatkowego oporu statku na fali. Kryteria projektowe sformułowano posługując się metodą opartą na scenariuszach deterministycznych, natomiast funkcje celów cząstkowych wyznaczono w postaci sztucznych sieci neuronowych. Optymalizację parametrów projektowych przeprowadzono metodą Pareto. Do wyboru najlepszych wariantów projektowych wykorzystano elementy logiki rozmytej, co pozwoliło m.in. na przedstawienie walorów projektu za pomocą zmiennych lingwistycznych. Takie podejście umożliwiło wybór wariantu najlepszego pod kątem wszystkich kryteriów jednocześnie.
    Źródło:
    Problemy Eksploatacji; 2008, 2; 149-158
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-26 z 26

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies