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Wyświetlanie 1-15 z 32
Tytuł:
Molluscs as technical models
Autorzy:
Samek, A.
Powiązania:
https://bibliotekanauki.pl/articles/83907.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
mollusc
technical model
animal morphology
unusual structure
phenomenon
Źródło:
Folia Malacologica; 2012, 20, 1
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The concept of the main dewatering model in a coal mine considering technical, managerial, and economic criteria
Autorzy:
Gumiński, Adam
Kurek, Marek
Powiązania:
https://bibliotekanauki.pl/articles/27313567.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
main dewatering system
technological processes
energy intensity
technical system model
główny system odwadniający
procesy technologiczne
energochłonność
model systemu technicznego
Opis:
Purpose: The primary purpose of the article is to cross-sectionally present the concept of a model for optimizing the main drainage system in a coal mine. Design/methodology/approach: The stated goal was achieved by using several research methods, including a literature study of existing technical system models and technical system modeling. Finally, the methodology used was based on a layered approach, which was verified by testing in a mine environment. Findings: In the course of the work, it was found that the main drainage system at the Sobieski Coal Mine is very complex. The energy intensity of the main dewatering process was identified as the main problem. The proposed concept of a layered model of the main dewatering system makes it possible to identify the influence of technical, management and economic parameters of the system. Research limitations/implications: The research limitations are due to the complexity of the system, the difficulties arising from the specificity of the mine environment, the lack of the possibility of ongoing diagnostics of the entire infrastructure (e.g. pipeline specification, the ability to measure sediment in water galleries, smooth change of the speed of drive mechanisms, etc.). Practical implications: The results of the research work will be recommendations for engineering and technical staff aimed at reducing the energy intensity of the system. Social implications: the conducted research is part of the current trend of searching for methods to reduce the energy intensity of systems and equipment. Originality/value: The originality of the issue stems from the proposed concept of a layered model of the main drainage system, taking into account technical, organizational and economic parameters. Determining the relationship between the elements of each layer will enable the development of an optimization method to reduce the energy intensity of the system.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2022, 160; 227--243
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systemic approach and model of the Polish Tactical Air Force
Autorzy:
Augustyn, E.
Kadziński, A.
Powiązania:
https://bibliotekanauki.pl/articles/247033.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
tactical air force
Tactical Air Force System
Model of Tactical Air Force System
Model of Generalized Technical System
technical object systems engineering
Opis:
The main purpose of this article is to present the structure of a tactical air force, on the example of the Polish Tactical Air Force, in a form of a technical system. This kind of technical system presents the technical point of view and organizationally bonds currently existing systems, objects (facilities) and components that are included into the Polish Tactical Air Force. The authors consider the Polish Tactical Air Force as the main analyses domain of this article. The model of presented system is mainly focused on operators’ organization and operation system of military aircraft, which are considered as technical objects (facilities) in a tactical air force. At the beginning of this article, the Polish Tactical Air Force is placed in more complex systemic structures. Then, the authors use the systems methodology, systems engineering, technical object-oriented (facility-oriented) approach and the matrix of the Model of Generalized Technical System to describe the Tactical Air Force System and present it via the model of such a system. The following model is based on a tree-shaped scheme divided into five levels of decomposition. The Model of Tactical Air Force System (as the “final product” of authors’ considerations over the selected analyses domain) has a considerable contribution to systems’ development in the Polish Armed Forces. The above-mentioned systems’ development could lead to greater progress in the Polish military as well as in systemic ideas. The implementation of the systems methodology in the design process of a new system, performed in a tactical air force, is an example of technical object systems engineering.
Źródło:
Journal of KONES; 2017, 24, 2; 7-16
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semi-Markovian models of the process of technical state changes of technical objects
Autorzy:
Girtler, J.
Powiązania:
https://bibliotekanauki.pl/articles/259191.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
model
technical object
semi-Marcovian process
technical state
Opis:
The most important problem of operation of all technical objects (devices) is the problem of rational (optimum) decision control of the process of technical state changes of the objects. Such control can be realized when a model of the process of technical stale chanŹges is applied. In view of this, a formal description of the operational process of technical objects was presented in this paper, as well as it was justified that the model of the process may be a semi-Markovian process of finite set of states. Examples of 4-and 3-state semiŹ-Markovian process were given as a model of the above mentioned process of state chanŹges of any device. Difficulties associated with forming such model, which arise from application of the theory of semi-Markovian processes, were indicated. Therefore the proposed model is the semi-Markovian process whose values are technical states occurring in the phase of operation of many technical objects of practical importance (e.g. combustion piston engines, turbines, displacement and rotary compressors, impeller pumps etc).
Źródło:
Polish Maritime Research; 2004, 4; 3-7
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application example of a multiaspect diagnostic model
Przykład zastosowania wieloaspektowego modelu diagnostycznego
Autorzy:
Skupnik, D.
Powiązania:
https://bibliotekanauki.pl/articles/327778.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diagnostyka techniczna
model diagnostyczny
model wieloaspektowy
technical diagnostics
diagnostic model
multiaspect model
Opis:
The paper shows an application example of a multiaspect diagnostic model, i.e. a special kind of a model that consists of at least two submodels which are applied together but they can be identified separately most often by means of the different methods and criteria. In the presented example each submodel concerns the one in five predefined aspects (viewpoints). The example concerns a technical object which makes possible diagnostics of the continuous processes and exemplifies a physical miniaturization of an industrial installation used e.g. in chemical industry. The chosen results of diagnosis obtained from the multiaspect diagnostic model were shown and discussed.
Artykuł przedstawia przykład zastosowania wieloaspektowego modelu diagnostycznego, który składa się z co najmniej dwóch stosowanych łącznie modeli składowych, przy czym modele te identyfikowane są oddzielnie najczęściej za pomocą różnych metod i kryteriów. W prezentowanym przykładzie każdy model składowy dotyczy jednego z pięciu zdefiniowanych wcześniej aspektów (punktów widzenia). Przykład dotyczy obiektu technicznego, dla którego możliwe jest diagnozowanie procesów ciągłych i stanowi fizyczną miniaturyzację instalacji przemysłowej stosowanej, np. w przemyśle chemicznym. Przedstawiono i przedyskutowano wybrane wyniki uzyskane z wieloaspektowego modelu diagnostycznego.
Źródło:
Diagnostyka; 2010, 4(56); 9-15
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theory of Creating Projects for Teaching Technical Subjects and Computer Visualization
Autorzy:
BERNÁT, Milan
Powiązania:
https://bibliotekanauki.pl/articles/455887.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Rzeszowski
Tematy:
creating projects
computer model
teaching technical subjects
Opis:
The paper reports the aspects related to Java applets creation and their application in teaching natural and technical subjects. The author of the paper also presents the Java applets he himself created and applied in the natural and technical teaching process. At the same time he emphasizes the irreplaceability of didactic and professional mastership of a teacher in the teaching process using Java applet programmes.
Źródło:
Edukacja-Technika-Informatyka; 2015, 6, 2; 53-56
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Creating Projects (Highlighting the Practical Application of the Subject Matter) for Teaching Technical Subjects
Autorzy:
BERNÁT, Milan
Powiązania:
https://bibliotekanauki.pl/articles/456416.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Rzeszowski
Tematy:
creating projects
computer model
teaching technical subjects
Opis:
The contribution is a selected example of instruction sheets for implementation of visualization of electro-magnetic processes
Źródło:
Edukacja-Technika-Informatyka; 2015, 6, 1; 102-107
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peculiarities of technical object’s safety level evaluation
Autorzy:
Korostil, J.
Powiązania:
https://bibliotekanauki.pl/articles/360587.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
risk
safety
model
environment
malfunction
technical object
Opis:
In this work is developed method of evaluation safety level, which decreases with floating intensity functioning during technical object. Factors, condition such changes were reviewed. Basing on proposed methodic of detection of various types of risks exists possibility to form constructive algorithms of evaluation of safety level, which allows forming adequate danger counteraction means. One of basic factors, representing dangers, is malfunctions, appearing on technical object.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 40 (112); 100-104
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Initial model of transport means availability of real city transport system
Autorzy:
Woropay, M.
Migawa, K.
Bojar, P.
Powiązania:
https://bibliotekanauki.pl/articles/242151.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
city transport system
Markov's model
technical object
Opis:
The article presents a determination method of transport means service ability in a real city transport system. The considerations have been demonstrated on the basis of a real city bus transport system in a chosen agglomeration. The executive subsystem consisting of elementary subsystems of the type human - technical object (operator - transport means) whose service ability and reliability have a direct influence on capability to perform the transport task is directly responsible for accomplishment of the city transport system tasks. In order to develop a model of means of transport serviceability there were determined significant states of the operational use process and there was made a division and reduction of the number of states in terms of the availability criterion. On this basis, an event model of the process of transport means operational use, and then a mathematical model of this process, were built with the assumption that its model is a homogenous Markov 's process X(t). Next, boundary values of availability coefficient for the distinguished availability levels of transport means used in the city transport system were determined for operational data obtained from a real city bus transport system. The discussed model for determination of transport means availability is an initial one, developed on the basis of a nine-state model of operational use. In further part of the paper, there will be developed a resultant model of transport means availability determination (semi-Markov 's sixteen-state model), being a component of a wider, decision model for creation and assessment of transport means availability.
Źródło:
Journal of KONES; 2009, 16, 2; 495-502
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probabilistic concept of defining the situations possible to occur during operation of floating docks
Autorzy:
Girtler, J.
Powiązania:
https://bibliotekanauki.pl/articles/260295.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
floating dock
safety
model
reliability
technical object
semi-Markov process
technical state
Opis:
In this paper possibility to assess safety of floating docks as a result of application of the theory of semi-Markov processes both in the phase of their designing and operating, is outlined. Formal description of the situations which may occur during service of floating docks both those intended for building and repairing the ships, was presented. The following situations were distinguished : normal, complicated, hazardous, emergency and disastrous. A model of changing the distinguished situations was proposed in the form of a semi - Markov process with discrete set of states, and continuous with time. The mentioned situations are values of the process. An operational safety measure for dock was formulated in the form of the probability of the event consisting in occurrence of normal or complicated situation. It was proved that assessment of probability of occurrence of particular situations is possible.
Źródło:
Polish Maritime Research; 2005, S 1; 34-38
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A MULTI-PRODUCT VERSION OF THE DEA+ METHOD
Autorzy:
Prędki, Artur
Powiązania:
https://bibliotekanauki.pl/articles/453852.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
DEA+
semiparametric frontier model
production function
technical efficiency
Opis:
The paper presents the DEA+ method as a tool for estimating the production function and the measure of technical efficiency in data points. A multi-product case is considered. Presentation of the underlying semiparametric frontier model is followed by demonstration of the very algorithm of DEA+ and a discussion of its validity. Finally, the method is illustrated with an empirical example with selected model distributions for each random variable constituting the composed error.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2014, 15, 2; 317-329
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Features of protection of technical objects against negative exposure
Autorzy:
Korostil, J.
Powiązania:
https://bibliotekanauki.pl/articles/114248.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
attack
prognosis
security system
model
technical object
tools
Opis:
This paper presents research of different classes of attacks against complex technical objects. Attacks are differentiated into different classes on the basis of analysis of attack features which reflect the possible methods of attack interaction with the security system. The developed methods of formal description of attacks and defense methods on the level of their logical approximation allow describing tasks of withstanding attacks for defense tools with enough certainty. Thanks to the proposed interpretation of attack interaction with a defense object and defense tools, it has become possible to determine approaches to the extension of the defense system by adding new tools oriented towards withstanding new attacks.
Źródło:
Measurement Automation Monitoring; 2016, 62, 7; 234-237
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodology of acquisition of knowledge concerning diagnostics of machinery and processes
Metodyka pozyskiwania wiedzy dotyczącej diagnostyki maszyn i procesów
Autorzy:
Moczulski, W.
Powiązania:
https://bibliotekanauki.pl/articles/329174.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diagnostyka techniczna
pozyskiwanie wiedzy
model heurystyczny
technical diagnostics
knowledge acquisition
heuristic model
Opis:
The paper deals with an outline of a methodology of acquisition of diagnostic knowledge concerning machinery and processes. The problem formulated in the paper concerns the possibility to develop a general methodology of acquiring knowledge of technical diagnostics. Two issues are discussed: methods of knowledge acquisition about machinery mainly considered as static objects, and methods of acquiring knowledge in the form of heuristic models of dynamic objects and processes. Methods developed in the author's research group are mainly dealt with. The paper concludes with future work envisaged.
W artykule przedstawiono zarys metodyki pozyskiwania wiedzy diagnostycznej dotyczącej maszyn i procesów. Sformułowany problem badawczy dotyczy możliwości utworzenia i rozwoju ogólnej metodologii pozyskiwania wiedzy w zakresie diagnostyki technicznej. Omawiane są dwie grupy metod: pozyskiwania wiedzy o maszynach interpretowanych jako obiekty statyczne, a także pozyskiwania wiedzy w postaci heurystycznych modeli obiektów (dynamicznych) oraz procesów. Przedmiotem opisu SA w głównej mierze metody rozwijane w grupie badawczej, w której pracach uczestniczy autor. Artykuł zakończony jest próba określenia przyszłych prac dotyczących pozyskiwania wiedzy diagnostycznej.
Źródło:
Diagnostyka; 2008, 4(48); 123-127
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the stochastic technical stability of engineering structures on an example of a moving car
Autorzy:
Kisilowski, J.
Zalewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/280974.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
stochastic technical stability
mathematical model of motor vehicle
nonlinearity
Opis:
The article presents analysis of the stochastic technical stability of mathematical models (described by the second-order ordinary differential equations) of technical objects, on the example of a moving motor vehicle with the disturbed location of the center of mass, as a result of a non-uniform load. After conducting simulation of motion of a sport vehicle mathematical model, using the MSC Adams/Car software, executing a maneuver of double lane change without completely returning to the original road lane, interpretation of the results in accordance with the given definition has been attempted. Specifically, the aspect of determining the probability of the solution remaining in a certain area of feasible solutions has been highlighted, as well as determination of the magnitude of this probability for stable motion. In addition, attention has been paid to the selection of the upper limit of probability, for which, under certain conditions, stable motion can be determined.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1157-1167
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single Market Enlargement and Technical Barriers to Trade: Revisiting the Evidence
Autorzy:
Hagemejer, Jan
Matuszczak, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/29431172.pdf
Data publikacji:
2024-03-28
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
Tematy:
European integration
EU enlargement
gravity model
technical barriers to trade
Opis:
EU enlargements have given new EU member states access to the European Single Market. While tariff liberalisation was already completed at the time of enlargement, technical regulations were subject to different sectoral approaches, including harmonisation and mutual recognition. We employ a structural gravity model estimated using sectoral trade data from 1987 to 2020 to assess the trade effects of these measures. We find that trade expansion, particularly exports of the NMS to the incumbent EU members, has been stronger in the sectors covered either by the Old Approach (full harmonisation) or the New Approach (essential requirements) than in sectors covered by mutual recognition. The New Approach has been more effective when coupled with mutual recognition at the sector level than with either approach alone. Our results imply that the TBT harmonisation has had a heterogenous impact on different sectors (the most important for low-tech industries was the Old Approach, while for high-tech, it was the New Approach).
Źródło:
Central European Economic Journal; 2024, 11, 58; 79-96
2543-6821
Pojawia się w:
Central European Economic Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 32

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