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 "operation speed" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-8 z 8
    Tytuł:
    Implementation of modified additive lagged Fibonacci generator
    Autorzy:
    Mandrona, M. M.
    Maksymovych, V. M.
    Harasymchuk, O. I.
    Kostiv, Y. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/115530.pdf
    Data publikacji:
    2016
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    generator of pseudorandom bit sequence
    additive lagged Fibonacci generator
    cryptographic security
    operation speed
    statistical characteristics
    generator liczb pseudolosowych
    generator Fibonacciego
    bezpieczeństwo kryptograficzne
    szybkość operacji
    parametry statystyczne
    Opis:
    Generator of pseudorandom bit sequence with increased cryptographic security, which is based on additive lagged Fibonacci generator, is developed. The generator structure circuit and it work principle are described in the paper. There are also given two variants of it construction that are formed on programmable logic device developed by Xilinx company. The main generator characteristics are researched, in particular: recurrence period, fastacting, statistical characteristics. In relation to the last the statistical portrait is presented, that was built with the help of NIST tests.
    Źródło:
    Challenges of Modern Technology; 2016, 7, 1; 3-6
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Operability guidelines for product tanker in heavy weather in the Adriatic Sea
    Autorzy:
    Mudronja, L.
    Katalinić, M.
    Bošnjak, R.
    Vidan, P.
    Parunov, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/320831.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    operation criteria
    sustainable speed
    Tabain wave spectrum
    integrated navigation system
    Opis:
    This paper presents operability guidelines for seafarers on a product tanker which navigates in the Adriatic Sea during heavy weather. Tanker route starts from the Otranto strait in the south to the island Krk in the north of Adriatic Sea. Heavy weather is caused by south wind called jugo (blowing from E-SE to SS-E, sirocco family). Operability guidelines are given based on an operability criteria platform for presenting ship seakeeping characteristics. Operability criteria considered in this paper are propeller emergence, deck wetness and bow acceleration of a product tanker. Limiting values of mentioned criteria determine sustainable speed. Heavy weather is described by extreme sea state of 7.5 m wave height. Wave spectrum used in this paper is Tabain spectrum which is developed specifically for Adriatic Sea. Seafarer’s approach of decisions making in extreme weather is also shown and servers as a guideline for further research of the authors.
    W artykule przedstawiono propozycję wytycznych operacyjnych dla żeglugi tankowca na Morzu Adriatyckim podczas pogody sztormowej. Rozpatrywany szlak zaczyna się w cieśninie Otranto na południu i prowadzi do wyspy Krk na północy. Założono, że pogoda sztormowa jest spowodowana przez wiejący z kierunku SS-E wiatr południowy Jugo z grupy wiatrów lokalnych Sirocco. Zalecenia operacyjne zostały opracowane na podstawie kryteriów użytecznych dla osób odpowiadających za wachtę morską. Za takie uznano przede wszystkim: aspekt wynurzania się śruby napędowej, czynnik zalewania pokładu i przyspieszenia rejestrowane na dziobie statku. Wartości graniczne wspomnianych kryteriów określają dopuszczalną prędkość statku. Pogoda sztormowa została opisana przez dopuszczalny stan morza wyrażony wysokością fal (7.5 m). Dla opisu spektrum fal zastosowano kryterium Tabaina, najlepiej opisujące specyfikę Morza Adriatyckiego. Zaproponowane podejście zostanie również wykorzystane przez autora w dalszych badaniach.
    Źródło:
    Annual of Navigation; 2014, 21; 95-106
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of the Methodology of Conducting Military Operations on the Example of the Clash of Two-Speed Civilisations During the Conflict in Ukraine 2014–2022
    Autorzy:
    Mitkow, Szymon
    Górnikiewicz, Marcin
    Sługocka, Ewa
    Powiązania:
    https://bibliotekanauki.pl/articles/2195798.pdf
    Data publikacji:
    2022-12-31
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    military operation
    war in Ukraine
    two-speed civilisations
    Russia
    Ukraine
    Opis:
    The difference in the methodology of conducting military operations by Russian and Ukrainian troops during the war ongoing since February 2022 is striking. It does not result only from the adopted convention of conducting these activities but is conditioned on a much deeper mental level resulting from cultural conditions. They determine the perception and understanding of the phenomenon of war. In other words, the operational and tactical methodology can be adapted to changing realities, provided that the essence of such a change is understood in terms of achieving the assumed military and non-military goals. Furthermore, these goals could be achieved by conducting military operations according to a completely different methodology, probably with much greater effectiveness. Why, in such a perspective, did the Russian side choose such a barbaric way of conducting war, characterising the methodology of military actions of the past decades or even centuries? This paper aims to answer the research question: What premises condition the Russian methodology of military action in the Russian-Ukrainian war of 2022? Empirical methods were employed to obtain an answer to this question.
    Źródło:
    Polish Political Science Yearbook; 2022, 4(51); 35-46
    0208-7375
    Pojawia się w:
    Polish Political Science Yearbook
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integrated operation and maintenance optimization for high-speed train fleets considering passenger flow
    Autorzy:
    Liu, Jiankun
    Jiang, Zuhua
    Zhou, Hongming
    Powiązania:
    https://bibliotekanauki.pl/articles/2087012.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    preventive maintenance
    high-speed train
    fleet operation and maintenance
    passenger flow
    Opis:
    A joint optimization model of maintenance and operation of high-speed train fleets is established with the optimization objective of minimizing the total costs, considering dynamic passenger flow and maintenance resources. A new maintenance strategy CCPM (Coordinating Conflicts Preventive Maintenance) is proposed to optimize the problem. The effectiveness of the model and the strategy are verified by numerical examples. The comparison between the strategy in the paper and the existing approach proves that the new strategy is more effective and shows the importance of considering dynamic passenger flow. The model and the strategy provide decision support for the actual high-speed trains operation and maintenance program. This study also offers new ideas to the subsequent research on preventive maintenance of high-speed trains.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 2; 297--305
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Load analysis of propulsion engine during ships speed acceleratio
    Autorzy:
    Rosłanowski, J.
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246664.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    load propulsion engine
    ship's speed acceleration
    control engine operation
    running non-overload engine
    Opis:
    The following paper presents load analysis of propulsion engine during ship's speed acceleration. This process is carried out after manoeuvring in order to receive, as fast as possible, exploitation speeds of the ship, achieved during the voyage. The analysis concerns direct propulsion power system of low-speed engine of constant pitch propeller. Wrong steering process of engine load changes in temporary states, can cause engine overloading, as the result of its operation on the external limiting characteristic and can end up in engine seizure. Control of engine operation is carried on through selecting of adequate setting of rotational speed governor, which for specified external conditions can result in adequate position of fuel link and the choice of adequate fuel index arm dose. Equalization of the power delivered by the engine in given conditions of work with power required by the ship’s propeller cooperating with the hull, will establish adequate rotational speed of the engine and finally the speed of the vessel. In order to speed up the sip's motion, there must occur an overflow of propeller thrust over the required thrust (resistance) and this, in turn, is connected with the necessity to ensure the engine power surplus over the power required for a given range of operation or in other words sailing speed. This article presents the working model of ship propelling system during speed acceleration and concerns mainly nonoverload running of the engine. The model described above has been verified during tests in real conditions at sea.
    Źródło:
    Journal of KONES; 2012, 19, 2; 443-448
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of Nitrogen Oxides Emission Reduction Methods on Specific Fuel Consumption of Marine Diesel Engines
    Autorzy:
    Herdzik, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/2069919.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    ship operation
    medium speed diesel engine
    slow speed diesel engine
    emission to atmosphere
    nitrogen oxides emission reduction
    specific fuel consumption
    Opis:
    The paper has been presented the methods of nitrogen oxides emission reduction to fulfill the Tier 2 and Tier 3 requirements of the Annex VI of MARPOL Convention. It has been shown the development of marine two-stroke diesel engines and the change of nitrogen oxides emission from 1960 to 2000 and later up to 2020 after the implementation of NOx emission reduction methods. Specific fuel consumption before 2000, and as a prediction and given data in the manufacturers manuals for Tier 3 engines up to 2020, and as only a prediction up to 2030 has been analyzed and elaborated. Impact of nitrogen oxides reduction methods on the specific fuel consumption of the marine diesel engine has been evaluated. Additional emission of some gases to the atmosphere due to the implementation of reduction methods has been determined. EGR and SCR systems have got a lot of imperfections: required to install additional reduction systems (investment cost, required volume in the engine room), need maintenance and operation costs, produced wastes during treatment process. The estimated additional cost is about 0.8 USD/MWh of produced energy, taking into account only the cost of excessive used fuel. The whole increased cost may reach the level two-three times more due to cleaning systems investment costs, their operational cost and waste disposal. It has been the one of the reasons of worsening the transport effectiveness and competitiveness.
    Źródło:
    Rocznik Ochrona Środowiska; 2021, 23; 279--289
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modernization of the direct operation fuel feeding system of diesel engine
    Autorzy:
    Salykin, E. A.
    Slavutskij, V. M.
    Lipilin, V. I.
    Berezjukov, D. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/244255.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    direct operation fuel feeding system
    speed forcing of high pressure fuel pump
    fuel feeding
    Opis:
    This paper describes the way of modernization of the direct operation fuel feeding system of diesel engine. Effective, ecological and economical characteristics of a modern diesel engine are greatly de-termined by parameters of using fuel-feeding system. Thus, in modern conditions, fuel-feeding systems have to fulfil specified requirements, which are mainly connected with fuel supply process intensification, possibility of adaptable regulation of fuel injection lead angle, cycle fuel delivering and injection characteristic at full range of engine operation regimes. At present time accumulator fuel feeding systems Common Rail type, fulfil these requirements best of all. However, despite its advantages, those kinds of systems have number of disadvantages. The main ones are high price and structural complexity of the system elements. Because of this Common Rail does not have wide using in the diesel engines with number of cylinders less than three. Although that type of diesels exactly is universal mechanical energy, source and can be used in many types of machinery, including ones with strict ecological norms. However, up to now these engines are equipped with the direct operation fuel feeding system that despite its high reliability and low price is worse than accumulator systems in the injection pressure level and possibilities of fuel feeding process control. Thus, main objective of a modernization of the direct operation fuel feeding system is topical. Speed forcing of high-pressure fuel pump was used. Maximal injection pressure is successfully increased 1.42 times. It provides intensification of fuel injection process. Implementation of the electronic control allows counting this method of fuel feeding system modernization promising for small diesel engines.
    Źródło:
    Journal of KONES; 2015, 22, 1; 273-276
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of dynamic performances of the safe operation of high-speed electric train
    Autorzy:
    Domin, R.
    Domin, I.
    Cherniak, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/223834.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high-speed electric train
    electric train
    safe operation
    computer simulation
    dynamic performances
    anti-yaw dampers
    szybki pociąg elektryczny
    pociąg elektryczny
    bezpieczeństwo
    symulacja komputerowa
    osiągi dynamiczne
    Opis:
    The process of implementation of new developments, in particular, new generation rolling stock holds a prominent place among the range of measures for organization of high-speed passenger rail transportation in Ukraine. The example of permission for use and the initial phase of work with interregional NRCS2 dual-mode electric trains produced by Hyundai-Rotem Corporation is the illustrative one in this context. Due to the detection of macro-cracks in bolster beams of the car body frames of these electric trains, namely in the areas of mounting of anti-yaw dampers, these trains were taken out of service until the completion of the modernization of problematic nodes. The comprehensive study on the determination of the safety parameters of electric trains was conducted to determine the causes of destruction of bolster beams. At the same time, bolster beams loading was estimated depending on the characteristics of anti-yaw dampers by means of computer simulation of the dynamics of motion of trailing and motor cars. The feasibility of selection of parameters for anti-yaw dampers mounted on electric train cars was assessed. The results of work will improve the safe operation of high-speed trains and increase the efficiency of estimates regarding the loading of bearing structures of underframes of the of rolling stock.
    Źródło:
    Archives of Transport; 2017, 41, 1; 7-16
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

      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