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Tytuł:
The role of knowledge in cyber-physical systems of systems
Autorzy:
Sanz, Ricardo
Bermejo, Julita
Rodrigez, Manuel
Aguado, Esther
Powiązania:
https://bibliotekanauki.pl/articles/1954570.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska
Tematy:
cyber-physical systems
systems-of-systems
knowledge
integration
engineering
autonomy
cyber-fizyczne systemy
systemy-systemy
wiedza
integracja
inżynieria
autonomia
Opis:
Characterinsing the nature of cybephysical systems is not easy task. What are core aspects and what are not? This is especially tricky in systems-of-systems aggregates. Some EU-funded cyberphysical systems projects have performed a roadmapping exercise over the domain of Cyber-Physical Systems-of-Systems. In particlular, the EU-CPSoS project roadmap has identified three major challenges and eleven research and innovation policies that shall be addressed to solve the three challenges. The third core challenge addresses Cognitive Cyber-physical Systems of Systems. In this article we address the role that knowledge and cognition are to play in future cyber-physical systems of systems from a life-cycle perspective of high autonomy systems.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2021, 25, 3; 355-373
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CURRENT CHALLENGES IN THE ECONOMICS OF TRANSPORT SYSTEMS – a stakeholder and club good approach
Autorzy:
Platje, Joost
Powiązania:
https://bibliotekanauki.pl/articles/504315.pdf
Data publikacji:
2012
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
economics of transport systems sustainable urban transport systems stakeholder theory
club goods
sustainable development
Opis:
In this article, after discussing the concept of transport systems and the importance of its sustainability, stakeholder theory and club good theory are presented as useful instruments for analyzing different challenges for the sustainabil-ity of transport systems. This approach goes beyond the traditional discussion on private vs. public ownership or pro-vision, and may better grasp the increasing complexity of transport systems. Stakeholders have different strengths and different priorities which may trade-off. This creates serious challenges for the sustainability of transport systems as well as its influence on the quality of life of different stakeholders. It will be argued that there exists the threat of transport systems to become a kind of club good by excluding parts of society from access and other benefits.
Źródło:
Logistics and Transport; 2012, 15, 2; 37-49
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From immunology to modeling, processing and analysis of data
Od immunologii do modelowania, przetwarzania i analiz danych
Autorzy:
Lasek, Mirosława
Lasek, Witold
Pęczkowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/432071.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
immunology
immunocomputing
artificial immune system
algorithms of artificial immune systems
representation of the elements of biological systems in artificial immune systems
the use of artificial immune algorithms in practice
Opis:
Observation of nature is often the inspiration for unconventional and innovative ideas, proposals, suggestions, overall concepts for carrying out modeling phenomena and technical processes, economic, processing and analysis of statistical data. Artificial neural networks, genetic algorithms and evolutionary algorithms were created as an imitation of biological solutions. In recent years, the rapid development of immunological algorithms which are based on the action of the human immune system, has occurred. These algorithms are used in mathematics, engineering, problem solving in decision making, management, economics, finance. At the beginning of this article we describe the action of the human immune system, which is the basis for the construction of immune algorithms. Then we present the most important mechanisms influencing the operation and construction of the algorithms based on biological mechanisms of the immune system, in particular the negative selection, immune network, clonal selection. Then we describe how the elements and mechanisms of artificial immune system algorithms are represented to enable modeling, processing and analysis of data. In the last part of the article to illustrate the wide range of possibilities of using immune algorithms to solve various sorts of problems from a completely different fields, we present examples of applications that involve the assessment of bank borrowers, the task of coloring a graph belonging to combinatorial optimization problems, a multi-dimensional classification, fault detection.
Źródło:
Informatyka Ekonomiczna; 2013, 4(30); 196-225
1507-3858
Pojawia się w:
Informatyka Ekonomiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of systems reliability
Autorzy:
Wesołowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/93046.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
identification
systems
modelling
reliability of systems
Opis:
A purpose of the article is discussing the method of technical systems reliability modelling. The most important methods used for constructing realist models of the physical world, i.e. the method of the experimental modelling and the method of the probabilistic modelling, were presented. The particular attention was focussed on the method of the probabilistic modelling allowing for taking into account uncertainty in functioning of systems. An example of using the proposed method to the modelling of the reliability of the air-traffic-control-system was quoted.
Źródło:
Studia Informatica : systems and information technology; 2011, 1-2(15); 43-54
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of pneumatic systems in the control of the transport line of rolling elements
Autorzy:
Szcześniak, Adam
Szcześniak, Zbigniew
Cedro, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/2204617.pdf
Data publikacji:
2023
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
pneumatic systems
delay execution systems
synthesis
verification of sequential systems
Opis:
This paper presents the synthesis of a pneumatic control system for a selected configuration of the transport path for the delivery of rolling elements to spiral storage in inter-operational transport. The sequential control system sets the state of the manifolds to ensure a flow of workpieces to serve the subsequent storage. The essential module of the control system is the memory block. It is developed based on a storage filling sequence graph. The filling level of the storages can be monitored in one or two points using sensors. The rolling element displacement control sensors work together with appropriately designed systems to execute the delay of the rising and falling edge input signal. By using a two-level control of the filling level of the storages, it is possible to control the emptying status of the storages as a function of the technological time of removal of the items from the storage between the two control points. Control systems were synthesised and verified using Festo’s FluidSim computer programme.
Źródło:
Acta Mechanica et Automatica; 2023, 17, 2; 254--262
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
General specification of multi-robot control system structures
Autorzy:
Zieliński, C.
Winiarski, T.
Powiązania:
https://bibliotekanauki.pl/articles/199952.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
robot control systems
specification of controllers
multi-robot systems
Opis:
The paper deals with structuring robot control systems. The control system is decomposed into distinct agents. An agent, in general, is responsible for control of its effector, perception of the environment for the purpose of its effector control, and inter-agent communication. The behaviour of the agent is governed by its set of transition functions. The control system consists of two tiers – the upper tier is defined by the flow of information between the agents and the lower tier is defined by formal specification of each agent’s behaviour (influence on the environment, gathering sensor readings, production and consumption of the information for/from the other agents). The paper presents one of the examples of utilization of this approach. The example concerns the multi-robot drawing copying system.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 1; 15-28
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating criteria for DP vessels
Autorzy:
Herdzik, J.
Powiązania:
https://bibliotekanauki.pl/articles/246077.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
DP systems
station keeping
evaluating criteria
estimation of DP systems
Opis:
The paper presents the evaluating criteria for DP vessels. A few persons tried to give a simple tool for comparing the station keeping capability between different ships. It was started in the seventies when most vessels claiming to have a DP system would be carried away by the current only (the limit was 1.5 up to 2 knots). Mainly DNV and ABS, next IMO prepared the calculating methods for DP system evaluation during the design process to receive the DP class 1, 2 or 3. The regulations may help but it’s still only rough estimate. One of them is the most popular. It is the capability plot presenting at preliminary the polar diagram with number envelops, showing the vessel’s capability to keep position or heading with a certain combination of thrusters in operation. The number, type, total power (or thrust) and location of thrusters are vital for estimating the DP capability from the propulsion system. The other equipment is only accessories assisting the DP system. At the end the sea trial may check and confirm the DP class of the vessel. The real capability for station keeping will be verified during normal operation, essentially during emergency situations like electric network faults, propulsion system failure up to damages and fire. It is needed some indexes or parameters during the design process to avoid serious faults. The paper is a probe of becoming familiar with chosen criteria.
Źródło:
Journal of KONES; 2013, 20, 4; 117-122
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of processing accounting information with a focus on satisfaction with present accounting software products
Autorzy:
Horák, Josef
Powiązania:
https://bibliotekanauki.pl/articles/951075.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
Enterprise Resource Planning
information systems
SAP
history of ERP systems
Opis:
Nowadays it is very important for a business entity to succeed in the competitive environment. Business enterprises look for ways to significantly and radically improve the efficiency of their corporate processes in order to facilitate the reduction of costs below the maximum level while at the same time maintaining the required quality of products and services. One of the ways to potentially reduce company costs is to implement the enterprise information system into the company environment. To become successful companies cannot simply rely upon their information system only, believing that the system implementation will improve their production efficiency. If core processes and their management are not working, no information system will lead a company to success.
Źródło:
Financial Sciences. Nauki o Finansach; 2013, 2 (15); 83-96
2080-5993
2449-9811
Pojawia się w:
Financial Sciences. Nauki o Finansach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Developing the computerization concept of the commercial agency by combining analytical perspectives
Autorzy:
Jeż, Szymon
Susłow, Walery
Powiązania:
https://bibliotekanauki.pl/articles/41204165.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Kazimierza Wielkiego w Bydgoszczy
Tematy:
computerization
business modeling
systems modeling
conceptual modeling of information systems
Opis:
The article presents the case of study of the computerization concept of a typical commercial agency, worked out through the view model and viewpoints framework. Simultaneous use of standard (business, object, structural) and unconventional (reach picture, organizational chart) analytical perspectives in the process of developing the concept of an information system has increased, according to the authors, the chance to build the transparent, clear, useable system.
Źródło:
Studia i Materiały Informatyki Stosowanej; 2011, 4; 41-48
1689-6300
Pojawia się w:
Studia i Materiały Informatyki Stosowanej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approximate constrained controllability of mechanical system
Sterowanie minimalno-czasowe manipulatorów hydraulicznych po zadanej ścieżce
Autorzy:
Klamka, J.
Powiązania:
https://bibliotekanauki.pl/articles/279817.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
linear infinite-dimensional control systems
mechanical flexible structure vibratory systems
controllability of abstract dynamical systems
Opis:
In the present paper approximate constrained controllability of linear abstract second-order infinite-dimensional dynamical control systems is considered. First, fundamental definitions and notions are recalled. Next it is proved, using the so-called frequency-domain method, that approximate constrained controllability of second-order dynamical control system can be verified by the approximate constrained controllability conditions for the simplified, suitably defined first-order linear dynamical control system. General results are then applied for approximate constrained controllability investigation of mechanical flexible structure vibratory dynamical system. Some special cases are also considered. Moreover, many remarks, comments and corollaries on the relationships between different concepts of approximate controllability are given. Finally, the obtained results are applied for investigation of approximate constrained controllability for flexible mechanical structure. In this case linear second-order partial differential state equation describes the transverse motion of an elastic beam which occupies the given finite interval.
Praca przedstawia metodę optymalizacji minimalno-czasowej ruchów manipulatorów hydraulicznych, po zadanej ścieżce członu roboczego. Zakładane jest, że ścieżka członu roboczego jednoznacznie określa odpowiadającą jej ścieżkę manipulatora w zmiennych uogólnionych. Optymalizacja sprowadza się wówczas do znalezienia optymalnego rozkładu parametru ścieżki w czasie. Proponowana metoda optymalizacji polega na przybliżeniu ciągłego rozkładu parametru zbiorem punktów, a następnie znalezieniu ich optymalnych położeń metodami programowania nieliniowego z ograniczeniami. Zakładana jest przy tym nieściśliwość cieczy hydraulicznej, w celu przyspieszenia obliczeń. Załączone są wyniki przykładowych optymalizacji, wykonanych na modelu trójczłonowej koparki hydraulicznej.
Źródło:
Journal of Theoretical and Applied Mechanics; 2005, 43, 3; 539-554
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The concept of identification of layers of safety system models through classification of risk reduction measures
Autorzy:
Gill, A.
Kadziński, A.
Powiązania:
https://bibliotekanauki.pl/articles/248109.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
risk
risk reduction measures
safety systems
models of safety systems
layers of protection
Opis:
The article is an introduction to the analysis of the functioning of the safety systems with the use of layered models. The idea behind these models is the classification of elements of safety systems into independent groups referred to as the layers of protection. It seems that the functioning of the safety systems is usually based on the concept of multi-layer securities. Modern technological installations of high-risk industrial facilities are fitted with multi layer security systems. The definition of the safety systems and a review of the definitions of hazard risk reduction measures as part of those systems are presented. A layer of the model of a safety system comprises the measure of risk reduction in terms of the stage of classification. It has been assumed that the safety system model will depend on the adopted classification of these measures. The classification of risk reduction measures used in safety systems of technical objects depending on the form of these measures is presented. Assuming that the form of the safety system model depends on the adopted classification of the risk reduction measures we can perform an identification of the layers of this model. The concept of identification of protection layers in multi-layers safety systems based on classifications is developed. The notation used in the classification of types of risk reduction measures is also presented. Schematic of safety system identification of transport systems objects according to the adopted classification of types of risk reduction measures is developed. According to these schematics, we can describe the safety system models of object other than those related to transport. An example of such an adaptation has been developed for a multi-layer safety system model of objects in the processing industry.
Źródło:
Journal of KONES; 2012, 19, 1; 105-115
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety of some homogeneous series-„k out of n” systems
Autorzy:
Milczek, B.
Powiązania:
https://bibliotekanauki.pl/articles/2068738.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
large systems
safety of large systems
asymptotic approach
limit reliability function
Opis:
In the reliability investigation of large-scale systems, the problem of the complexity of their safety functions arises. This problem may be approximately solved by assuming that the number of system components tends to infinity and finding the limit safety function of the system. The problem of finding the limit reliability function of large-scale systems is well known for basic two-state systems (Gnedenko for series and parallel systems [1], Smirnov for “k out of n” systems [8]). The problem of possible limit reliability functions for series-parallel and parallel-series is also well recognized [3]. The solution for two-state series-“k out of n” systems, while k/n→0 and also while k/n→1 can be found in [5] and [6]. The paper is concerned with mathematical methods in multistate asymptotic approach to series-“k out of n” systems safety and shows the methods of establishing its possible limit safety functions, while k/n→ λ, 0˂ λ˂ 1.
Źródło:
Journal of Polish Safety and Reliability Association; 2018, 9, 3; 115--120
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability analysis of two-state consecutive “m out of l: F”-series systems
Autorzy:
Guze, S.
Powiązania:
https://bibliotekanauki.pl/articles/2069564.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability function
series systems
consecutive "m out of k: F" systems
Opis:
A non-stationary approach to reliability analysis of two-state series and consecutive “m out of k: F” systems is presented. Further, the consecutive “m out of k: F”-series system is defined and the recurrent formulae for its reliability function evaluation are proposed. Moreover, the application of the proposed formulae to reliability evaluation of … composed of two-state components is illustrated.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 1; 175--178
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rescaled multilevel least-change almost secant methods
Autorzy:
Grzegorski, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/748509.pdf
Data publikacji:
1991
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Systems of equations
Nonlinear programming
Opis:
.
In this article the theory of local convergence is developed. One of the extensions consists in that the approximations to the Jacobian matrix have the same properties as the same matrix has in the solution. The example shows that this assumption may lead to simpler algorithms. The paper discusses several rescaled multilevel least-change updates for which local g-superlinear convergence is proved. The theory may be applied to a wider class of methods because every secant algorithm may be treated as a rescaled least-change method.
Źródło:
Mathematica Applicanda; 1991, 19, 33
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety of multistate series-„k out of n” systems
Autorzy:
Milczek, B.
Powiązania:
https://bibliotekanauki.pl/articles/2068728.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
large systems
safety of large systems
asymptotic approach
limit reliability function
Opis:
The paper is concerned with mathematical methods in asymptotic approach to systems safety and reliability analysis. In the safety investigation of large-scale systems, the problem of the complexity of their safety functions arises. This problem may be approximately solved by assuming that the number of system components tends to infinity and finding the limit safety function of the system. The article is based on the results of the author’s solutions for series-“m out of kn” given in [4] – [6].
Źródło:
Journal of Polish Safety and Reliability Association; 2018, 9, 3; 121--126
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 926

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