Informacja

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

Wyszukujesz frazę "complex problems" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Using Simulation Approach in an Assembly Line Implementation Project: a General and Qualitative Feedback
Autorzy:
Guimaraes, Renato
Houé, Thierry
Powiązania:
https://bibliotekanauki.pl/articles/504307.pdf
Data publikacji:
2011
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
assembly line
complex problems
industrial logistics
project
simulation
Opis:
In companies, the simulation has been used for over thirty years through analytical support and has improved production, handling and logistics. Simulation tools are very frequent and support the analysis process for the design and control of operations management and distribution. With the recent development of supply chain management, firms are part of more complex supply chains. The modelization and the evaluation of the links of these chains are vital for overall performance and to reveal strategic and inter-organizational issues that may appear. The work described in this paper is the result of a study that was conducted as part of a project to establish a new assembly line in an existing plant. The main objective of this paper is to present a summary review of the simulation potential in the design and the management of an industrial process through feedback. The paper also attempts to highlight mistakes that can be made in such projects.
Źródło:
Logistics and Transport; 2011, 12, 1; 33-40
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-solvability of the tangential ∂̅-system in manifolds with constant Levi rank
Autorzy:
Zampieri, Giuseppe
Powiązania:
https://bibliotekanauki.pl/articles/1207981.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
CR manifolds
∂̅ and $∂̅^b$ problems
tangential CR complex
Opis:
Let M be a real-analytic submanifold of $ℂ^n$ whose "microlocal" Levi form has constant rank $s^{+}_{M} + s^{-}_{M}$ in a neighborhood of a prescribed conormal. Then local non-solvability of the tangential ∂̅-system is proved for forms of degrees $s^{-}_{M}$, $s^{+}_{M}$ (and 0).
 This phenomenon is known in the literature as "absence of the Poincaré Lemma" and was already proved in case the Levi form is non-degenerate (i.e. $s^{-}_{M} + s^{+}_{M} = n - codim M$). We owe its proof to [2] and [1] in the case of a hypersurface and of a higher-codimensional submanifold respectively. The idea of our proof, which relies on the microlocal theory of sheaves of [3], is new.
Źródło:
Annales Polonici Mathematici; 2000, 74, 1; 291-296
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the robustness of the topological derivative for Helmholtz problems and applications
Autorzy:
Leugering, Günter
Novotny, Antonio André
Sokolowski, Jan
Powiązania:
https://bibliotekanauki.pl/articles/2183490.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
topological derivative
shape optimization
inverse problems
Helmholtz problem
numerical methods
complex variables
Opis:
We consider Helmholtz problems in two and three dimensions. The topological sensitivity of a given cost function J(uɛ) with respect to a small hole Bɛ around a given point x0ɛ ∈ Bɛ ⊂ Ω depends on various parameters, like the frequency k chosen or certain material parameters or even the shape parameters of the hole Bɛ. These parameters are either deliberately chosen in a certain range, as, e.g., the frequencies, or are known only up to some bounds. The problem arises as to whether one can obtain a uniform design using the topological gradient. We show that for 2-d and 3-d Helmholtz problems such a robust design is achievable.
Źródło:
Control and Cybernetics; 2022, 51, 2; 227--248
0324-8569
Pojawia się w:
Control and Cybernetics
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:
Process Approach to Learning and Teaching Mathematics
Autorzy:
Žakelj, Amalija
Powiązania:
https://bibliotekanauki.pl/articles/1969036.pdf
Data publikacji:
2018-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
process approach to learning and teaching
mathematics
basic and conceptual knowledge
solving simple mathematical problems
complex knowledge
Opis:
In the research, a quasi-experimental model was applied and the experimental group received the process approach to learning and teaching mathematics, which builds on the cognitive-constructivist findings of educational profession about learning and teaching mathematics. In the control group, the transmission approach prevailed. In the research, the question was answered of what impact the implementation of the process approach to learning and teaching mathematics has on the learner’s knowledge, which can be tested and assessed. Students in the experimental group (EG) performed significantly better in basic and conceptual knowledge, in solving simple mathematical problems, and in complex knowledge than those in the control group. Results of the research have also shown that there are statistically significant correlations between individual areas of mathematical knowledge. The correlations between the areas of knowledge are from medium high to high, indicating that conceptual knowledge correlates significantly with solving simple mathematical problems and with complex knowledge.
Źródło:
The New Educational Review; 2018, 54; 206-215
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zarządzanie bezpieczeństwem
Irreducibility Endogenised
Autorzy:
Delorme, Robert
Powiązania:
https://bibliotekanauki.pl/articles/903795.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Ekonomiczny w Krakowie, Małopolska Szkoła Administracji Publicznej
Tematy:
systemy złożone
problemy utajone
akceptowalny poziom ryzyka
optymalizacja ryzyka
zasada ostrożności
complex systems
latent problems
acceptable level of risk
risk optimisation
precautionary principle
Opis:
Autor niniejszej pracy, stanowiącej fragment książki pt. Deep Complexity and the Social Sciences. Experience, Modelling and Operationally, poddaje szczegółowej analizie kwestię niemożności zredukowania do zera ryzyka występowania wypadków w systemach złożonych. Odwołując się do prac autorów takich jak Charles Perrow, stawia tezę, że zasadniczą przyczynę tego rodzaju wypadków stanowi nieprzewidywalność interakcji między poszczególnymi częściami składowymi tych systemów. Następnie prezentuje koncepcję zabezpieczeń wielowarstwowych i poddaje ją krytyce ze względu na coraz większy dystans dzielący operatorów od systemów, które mają oni nadzorować, oraz nawarstwianie się tzw. problemów utajonych. Wybrany fragment pracy kończy się prezentacją różnych punktów widzenia na temat sposobów określania społecznie akceptowalnego poziomu ryzyka i jego optymalizacji w odniesieniu do zaproponowanego przez Jamesa Reasona teoretycznego modelu kompromisu między ryzykiem a wydajnością oraz omawia zastosowanie zasady ostrożności w praktyce.
The author of the present work, which constitutes an excerpt from his book Deep Complexity and the Social Sciences. Experience, Modelling and Operationally, offers a detailed analysis of an intrinsic irreducibility of risk of accidents in complex systems. Drawing on the works of authors such as Charles Perrow, he argues that the fundamental reason behind such events is the unpredictability of interactions between individual components of these systems. He goes on to outline the concept of defences-in-depth and criticises it on the grounds of the ever-growing distance between operators and the systems that they are supposed to supervise, and the occurrence of the so-called latent problems. The selected fragment of the book concludes with a presentation of different points of view on the subject of defining socially acceptable levels of risk and its optimisation with reference to the theoretical model of compromise between risk and performance proposed by James Reason, along with a discussion of the practical application of the precautionary principle.
Źródło:
Zarządzanie Publiczne / Public Governance; 2010, 3(13); 67-84
1898-3529
2658-1116
Pojawia się w:
Zarządzanie Publiczne / Public Governance
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

    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