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Wyszukujesz frazę "complex systems" wg kryterium: Temat


Wyświetlanie 1-8 z 8
Tytuł:
Engineering sustainable complex systems
Autorzy:
Ahram, T. Z.
Karwowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/406952.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
systems engineering
sustainability
human factors
human systems integration
complex systems
Opis:
Given the most competitive nature of global business environment, effective engineering innovation is a critical requirement for all levels of system lifecycle development. The society and community expectations have increased beyond environmental short term impacts to global long term sustainability approach. Sustainability and engineering competence skills are extremely important due to a general shortage of engineering talent and the need for mobility of highly trained professionals [1]. Engineering sustainable complex systems is extremely important in view of the general shortage of resources and talents. Engineers implement new technologies and processes to avoid the negative environmental, societal and economic impacts. Systems thinking help engineers and designers address sustainable development issues with a global focus using leadership and excellence. This paper introduces the Systems Engineering (SE) methodology for designing complex and more sustainable business and industrial solutions, with emphasis on engineering excellence and leadership as key drivers for business sustainability. The considerable advancements achieved in complex systems engineering indicate that the adaptation of sustainable SE to business needs can lead to highly sophisticated yet widely useable collaborative applications, which will ensure the sustainability of limited resources such as energy and clean water. The SE design approach proves critical in maintaining skills needed in future capable workforce. Two factors emerged to have the greatest impact on the competitiveness and sustainability of complex systems and these were: improving skills and performance in engineering and design, and adopting SE and human systems integration (HSI) methodology to support sustainability in systems development. Additionally, this paper provides a case study for the application of SE and HSI methodology for engineering sustainable and complex systems.
Źródło:
Management and Production Engineering Review; 2013, 4, 4; 4-14
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Routing flow-shop with buffers and ready times - comparison of selected solution algorithms
Autorzy:
Józefczyk, J.
Markowski, M.
Balgabaeva, L.
Powiązania:
https://bibliotekanauki.pl/articles/406986.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
manufacturing systems
operations research
complex systems
optimization problems
scheduling algorithms
routing algorithms
heuristics
computer simulation
Opis:
This article extends the former results concerning the routing flow-shop problem to minimize the makespan on the case with buffers, non-zero ready times and different speeds of machines. The corresponding combinatorial optimization problem is formulated. The exact as well as four heuristic solution algorithms are presented. The branch and bound approach is applied for the former one. The heuristic algorithms employ known constructive idea proposed for the former version of the problem as well as the Tabu Search metaheuristics. Moreover, the improvement procedure is proposed to enhance the quality of both heuristic algorithms. The conducted simulation experiments allow evaluating all algorithms. Firstly, the heuristic algorithms are compared with the exact one for small instances of the problem in terms of the criterion and execution times. Then, for larger instances, the heuristic algorithms are mutually compared. The case study regarding the maintenance of software products, given in the final part of the paper, illustrates the possibility to apply the results for real-world manufacturing systems.
Źródło:
Management and Production Engineering Review; 2014, 5, 4; 26-35
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust diagnostics of complex chemical processes: main problems and possible solutions
Autorzy:
Kościelny, J. M.
Syfert, M.
Powiązania:
https://bibliotekanauki.pl/articles/185748.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
complex systems
diagnostic system
alarm systems
diagnosis robustness
diagnostic inference
złożone systemy
system diagnostyczny
systemy alarmowe
wnioskowanie diagnostyczne
Opis:
The paper is aimed at presenting a study of the main limitations and problems influencing the robustness of diagnostic algorithms used in diagnostics of complex chemical processes and to present the selected exemplary solutions of how to increase it. The five major problems were identified in the study. They are associated with: uncertainties of fault detection and reasoning, changes of the diagnosed process structure, delays of fault symptoms formation and multiple faults. A brief description and exemplary solutions allowing increase of the robustness of diagnostic algorithms were given. Proposed methods were selected keeping in mind applicability for the on-line monitoring and diagnostics of complex chemical processes.
Źródło:
Chemical and Process Engineering; 2018, 39, 2; 165--183
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanizmy rozwoju przestrzeni ekonomicznej w kontekście debaty nad obszarami metropolitalnymi. Próba teoretycznej rekonstrukcji
The Mechanisms of the Development of Economic Space in the Context of Debate on Metropolitan Areas. An attempt to Theoretical Reconstruction
Autorzy:
Domański, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/2021348.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Emergence of complex spatial systems
punctuated equilibrium
selforganization
steady-states
theoretical reconstruction of processes
Źródło:
Studia komitetu przestrzennego zagospodarowania kraju PAN; 2018, 186; 30-50
0079-3507
Pojawia się w:
Studia komitetu przestrzennego zagospodarowania kraju PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przeciwzłożoność. Polityki prostoty
Countercomplexity. Politics of Simplicity
Autorzy:
Krajewski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/427384.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
złożoność
dynamiczne układy złożone
emergencja
polityka prostoty
działania zbiorowe
ponowoczesność
complexity
dynamic complex systems
emergence
politics of simplicity
collective action
postmodernity
Opis:
W artykule staram się pokazać konsekwencje, jakie niesie za sobą fakt, że człowiek świadomie doświadcza tego, iż funkcjonuje w obrębie dynamicznych układów złożonych. Jednym z najważniejszych rezultatów tej specyficznej własności ludzi jako gatunku jest próba zredukowania stopnia złożoności tego typu układów. Działania tego rodzaju określam mianem polityki prostoty oraz pokazuję, w jaki sposób realizuje się ona w obrębie zwrotu partycypacyjnego; modelowania matematycznego; w formach w jakich urzeczywistnia się dziś demokracja oraz działalność ekonomiczna, projektowanie itd. Staram się również pokazać, dlaczego polityka prostoty prowadzi do wzrostu stopnia złożoności współczesnego świata.
The main goal of the article is to show the consequences of the fact that people experience knowingly operating within the dynamic complex systems. One of the most important results of this specific human properties is an attempt to reduce the complexity of such systems. I recognize such activities as politics of simplicity and show how they are implemented within the “social turn”, mathematical modeling, in contemporary forms of democracy and economic activity, design, etc. I also try to show why the politics of simplicity increase the complexity of the modern world.
Źródło:
Studia Socjologiczne; 2013, 4(211); 37-50
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Lepschy stability test and its application to fractional-order systems
Autorzy:
Casagrande, Daniele
Krajewski, Wiesław
Viaro, Umberto
Powiązania:
https://bibliotekanauki.pl/articles/1409108.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional-order systems
D-stability
recursive algorithms
complex polynomials
root locus
symmetries
control-theory didactics
Opis:
It is shown how a stability test, alternative to the classical Routh test, can profitably be applied to check the presence of polynomial roots inside half-planes or even sectors of the complex plane. This result is obtained by exploiting the peculiar symmetries of the root locus in which the basic recursion of the test can be embedded. As is expected, the suggested approach proves useful for testing the stability of fractional-order systems. A pair of examples show how the method operates. It is believed that the suggested geometric approach can also be of some didactic value in introducing basic control-system tools to engineering students.
Źródło:
Archives of Control Sciences; 2021, 31, 1; 145-163
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid synchronization and parameter estimation of a complex chaotic network of permanent magnet synchronous motors using adaptive integral sliding mode control
Autorzy:
Siddique, Nazam
Rehman, Fazal U.
Powiązania:
https://bibliotekanauki.pl/articles/2128164.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chaotic systems
hybrid synchronization
HS
complex chaotic permanent magnet synchronous motor
adaptive integral sliding mode control
ISMC
Lyapunov function
systemy chaotyczne
synchronizacja hybrydowa
złożony chaotyczny silnik synchroniczny z magnesami trwałymi
adaptacyjne zintegrowane sterowanie trybem przesuwu
funkcja Lapunowa
Opis:
The synchronisation of a complex chaotic network of permanent magnet synchronous motor systems has increasing practical importance in the field of electrical engineering. This article presents the control design method for the hybrid synchronization and parameter estimation of ring-connected complex chaotic network of permanent magnet synchronous motor systems. The design of the desired control law is a challenging task for control engineers due to parametric uncertainties and chaotic responses to some specific parameter values. Controllers are designed based on the adaptive integral sliding mode control to ensure hybrid synchronization and estimation of uncertain terms. To apply the adaptive ISMC, firstly the error system is converted to a unique system consisting of a nominal part along with the unknown terms which are computed adaptively. The stabilizing controller incorporating nominal control and compensator control is designed for the error system. The compensator controller, as well as the adopted laws, are designed to get the first derivative of the Lyapunov equation strictly negative. To give an illustration, the proposed technique is applied to 4-coupled motor systems yielding the convergence of error dynamics to zero, estimation of uncertain parameters, and hybrid synchronization of system states. The usefulness of the proposed method has also been tested through computer simulations and found to be valid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; e137056, 1--9
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid synchronization and parameter estimation of a complex chaotic network of permanent magnet synchronous motors using adaptive integral sliding mode control
Autorzy:
Siddique, Nazam
Rehman, Fazal U.
Powiązania:
https://bibliotekanauki.pl/articles/2173614.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chaotic systems
hybrid synchronization
HS
complex chaotic permanent magnet synchronous motor
adaptive integral sliding mode control
ISMC
Lyapunov function
systemy chaotyczne
synchronizacja hybrydowa
złożony chaotyczny silnik synchroniczny z magnesami trwałymi
adaptacyjne zintegrowane sterowanie trybem przesuwu
funkcja Lapunowa
Opis:
The synchronisation of a complex chaotic network of permanent magnet synchronous motor systems has increasing practical importance in the field of electrical engineering. This article presents the control design method for the hybrid synchronization and parameter estimation of ring-connected complex chaotic network of permanent magnet synchronous motor systems. The design of the desired control law is a challenging task for control engineers due to parametric uncertainties and chaotic responses to some specific parameter values. Controllers are designed based on the adaptive integral sliding mode control to ensure hybrid synchronization and estimation of uncertain terms. To apply the adaptive ISMC, firstly the error system is converted to a unique system consisting of a nominal part along with the unknown terms which are computed adaptively. The stabilizing controller incorporating nominal control and compensator control is designed for the error system. The compensator controller, as well as the adopted laws, are designed to get the first derivative of the Lyapunov equation strictly negative. To give an illustration, the proposed technique is applied to 4-coupled motor systems yielding the convergence of error dynamics to zero, estimation of uncertain parameters, and hybrid synchronization of system states. The usefulness of the proposed method has also been tested through computer simulations and found to be valid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; art. no. e137056
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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