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Tytuł:
Extensions of the minimum labelling spanning tree problem
Autorzy:
Cerulli, R.
Fink, A.
Gentili, M.
Voss, S.
Powiązania:
https://bibliotekanauki.pl/articles/308930.pdf
Data publikacji:
2006
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
network design
metaheuristics
spanning trees
labelling trees
Steiner tree problem
Opis:
In this paper we propose some extensions of the minimum labelling spanning tree problem. The main focus is on the minimum labelling Steiner tree problem: given a graph G with a color (label) assigned to each edge, and a subset Q of the nodes of G (basic vertices), we look for a connected subgraph of G with the minimum number of different colors covering all the basic vertices. The problem has several applications in telecommunication networks, electric networks, multimodal transportation networks, among others, where one aims to ensure connectivity by means of homogeneous connections. Numerical results for several metaheuristics to solve the problem are presented.
Źródło:
Journal of Telecommunications and Information Technology; 2006, 4; 39-45
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of Pareto-Optimal Radar Receive Filters
Autorzy:
De Maio, A.
Piezzo, M.
Iommelli, S.
Farina, A.
Powiązania:
https://bibliotekanauki.pl/articles/227067.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
radar receive filter design
mismatched filte
design
multi-objective optimization problem
Pareto-optimal points
Opis:
This paper deals with the design of radar receive filters jointly optimized with respect to sidelobe energy and sidelobe peaks via Pareto-optimal theory. We prove that this criterion is tantamount to jointly minimizing two quadratic forms, so that the design can be analytically formulated in terms of a multi-objective optimization problem. In order to solve it, we resort to the scalarization technique, which reduces the vectorial problem into a scalar one using a Pareto weight defining the relative importance of the two objective functions. At the analysis stage, we assess the performance of the receive filters in correspondence of different values of the Pareto weight highlighting the performance compromises between the Integrated Sidelobe Level (ISL) and the Peak Sidelobe Level (PSL).
Źródło:
International Journal of Electronics and Telecommunications; 2011, 57, 4; 477-481
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control problems for systems described by hemivariational inequalities
Autorzy:
Denkowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/206594.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
konwergencja G i Gamma
nierówność hemiwariacyjna
operator pseudo-monotoniczny
problem Boltza
wielofunkcja
wrażliwość
zagadnienie poprawnie postawione
zagadnienie sterowania
Clarke subdifferential
control problems (Bolza problem, identification of parameters, optimal shape design)
G and Gamma convergence
hemivariational inequalities
multifunctions
pseudo-monotone operators
sensitivity
well-posedness
Opis:
The paper considers some control problems for the systems described by the evolution, as well as the stationary hemivariational inequalities (HVIs for short). First, basing on surjectivity theorems for pseudo-monotone operators we formulate some existence results for the solutions of the HVIs and investigate some properties of the solution set (like sensitivity; i.e. its dependence on data and operators). Next we quote some existence theorems for optimal solutions for various classes of optimal control like distributed control (e.g. Bolza problem), identification of parameters, or optimal shape design for systems described by HVIs. Finally, we discuss some common features in getting the existence of optimal solutions as well as some "well-posedness" problems.
Źródło:
Control and Cybernetics; 2002, 31, 3; 713-738
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new genetic approach for transport network design and optimization
Autorzy:
Dinu, S.
Bordea, G.
Powiązania:
https://bibliotekanauki.pl/articles/200177.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
genetic algorithm
bilevel programming
Network Design Problem
complex-encoding
Opis:
This paper presents an improved Genetic Algorithm to solve the Transportation Network Design Problem (CTNDP) with interactions among different links. The CTNDP is formulated in an optimal design as a bi-level programming model. A key factor in the present approach is the combination of diploid based complex-encoding with meiosis specific features. The novel mutation operator proposed is another improvement that leads to a better robustness and convergence stability. The computational results obtained by comparing the performance of the proposed algorithm and other Genetic Algorithms for a test network demonstrates its better local searching ability, as well as its high efficiency. Finally, suggestions for further research and extensions are given.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 3; 263-272
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Homotopy Approach to Rational Covariance Extension With Degree Constraint
Autorzy:
Enqvist, P.
Powiązania:
https://bibliotekanauki.pl/articles/908061.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
optymalizacja
teoria systemów
stochastic realization theory
rational covariance extension problem
ARMA model design
continuation method
optimization
Opis:
The solutions to the Rational Covariance Extension Problem (RCEP) are parameterized by the spectral zeros. The rational filter with a specified numerator solving the RCEP can be determined from a known convex optimization problem. However, this optimization problem may become ill-conditioned for some parameter values. A modification of the optimization problem to avoid the ill-conditioning is proposed and the modified problem is solved efficiently by a continuation method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2001, 11, 5; 1173-1201
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Binary neural networks for N-queens problems and their VLSI implementations
Autorzy:
Funabiki, N.
Kurokawa, T.
Ohta, M.
Powiązania:
https://bibliotekanauki.pl/articles/205704.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
algorytm
binarna sieć neuronowa
N-queens problem
optymalizacja kombinatoryczna
problem n-hetmanów
projekt VLSI
binary neural network
combinatorial optimization
NP-hard
VLSI design
algorithm
Opis:
Combinatorial optimization problems compose an important class of matliematical problems that include a variety of practical applications, such as VLSI design automation, communication network design and control, job scheduling, games, and genome informatics. These problems usually have a large number of variables to be solved. For example, problems for VLSI design automation require several million variables. Besides, thieir computational complexity is often intractable due to NP-hardness. Neural networks have provided elegant solutions as approximation algorithms to these hard problems due to their natural parallelism and their affinity to hardware realization. Particularly, binary neural networks have great potential to conform to current digital VLSI design technology, because any state and parameter in binary neural networks are expressed in a discrete fashion. This paper presents our studies on binary neural networks to the N-queens problem, and the three different approaches to VLSI implementations focusing on the efficient realization of the synaptic connection networks. Reconfigurable devices such as CPLDs and FPGAs contribute the realization of a scalable architecture with the ultra high speed of computation. Based on the proposed architecture, more than several thousands of binary neurons can be realized on one FPGA chip.
Źródło:
Control and Cybernetics; 2002, 31, 2; 271-296
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tikhonov regularization and constrained quadratic programming for magnetic coil design problems
Autorzy:
Garda, B.
Galias, Z.
Powiązania:
https://bibliotekanauki.pl/articles/330150.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
coil design problem
constrained quadratic programming
Tikhonov regularization
projektowanie cewki
programowanie kwadratowe
regularyzacja Tikhonova
Opis:
In this work, the problem of coil design is studied. It is assumed that the structure of the coil is known (i.e., the positions of simple circular coils are fixed) and the problem is to find current distribution to obtain the required magnetic field in a given region. The unconstrained version of the problem (arbitrary currents are allowed) can be formulated as a Least-SQuares (LSQ) problem. However, the results obtained by solving the LSQ problem are usually useless from the application point of view. Moreover, for higher dimensions the problem is ill-conditioned. To overcome these difficulties, a regularization term is sometimes added to the cost function, in order to make the solution smoother. The regularization technique, however, produces suboptimal solutions. In this work, we propose to solve the problem under study using the constrained Quadratic Programming (QP) method. The methods are compared in terms of the quality of the magnetic field obtained, and the power of the designed coil. Several 1D and 2D examples are considered. It is shown that for the same value of the maximum current the QP method provides solutions with a higher quality magnetic field than the regularization method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 2; 249-257
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On adhesive binding optimization of elastic homogeneous rod to a fixed rigid base as a control problem by coefficient
Autorzy:
Jilavyan, S. H.
Khurshudyan, A. Zh.
Sarkisyan, A. S.
Powiązania:
https://bibliotekanauki.pl/articles/229296.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
topology optimization
optimal design
control by coefficient
nonlinear moments problem
adhesive binding
Opis:
The problem of finite, partially glued to a fixed rigid base rod longitudinal vibrations damping by optimizing adhesive structural topology is investigated. Vibrations of the rod are caused by external load, concentrated on free end of the rod, the other end of which is elastically clamped. The problem is mathematically formulated as a boundary-value problem for onedimensional wave equation with attenuation and variable controlled coefficient. The intensity of adhesion distribution function is taken as optimality criterion to be minimized. Structure of adhesion layer, optimal in that sense, is obtained as a piecewise-constant function. Using Fourier real generalized integral transform, the problem of unknown function determination is reduced to determination of certain switching points from a system of nonlinear, in general, complex equations. Some particular cases are considered.
Źródło:
Archives of Control Sciences; 2013, 23, 4; 413-425
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design Thinking as a Tool for Participatory and Transformative Translator Education
Autorzy:
Klimkowski, Konrad
Klimkowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2028608.pdf
Data publikacji:
2021-06-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Design Thinking
translator education
educational approach
classroom activity
classroom communication
project method
problem-based learning
Opis:
This article outlines the main tenets and the working cycle of Design Thinking, which is a problem-solving methodology. We argue that this methodology helps train qualities and skills that are particularly beneficial for students of translator education programmes. We recommend Design Thinking for translation teachers who subscribe to post-positivist, constructivist and other problem-based, participatory and collaborative educational approaches. The latter part of the article presents examples of classroom activities developed with the use of Design Thinking methodology. The activities focus mostly on communicative interactions between participants, since we believe that the major advantage of Design Thinking for the translation classroom is that it offers a structured scaffolding to improve classroom communication.
Źródło:
Research in Language; 2021, 19, 2; 155-167
1731-7533
Pojawia się w:
Research in Language
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of delay plants via continuous-time GPC principle
Autorzy:
Kowalczuk, Z.
Suchomski, P.
Powiązania:
https://bibliotekanauki.pl/articles/206549.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
stabilność
sterowanie
continuous-time systems
control design problem
delay
predictive control
system design
closed loop stability
Opis:
The continuous-time generalised predictive control (CGPC) is considered in the context of control of continuous-time systems having a transportation delay. It is shown that the basic CGPC design strategy can be given in a form which facilitates a clear discussion of relevant design consequences concerning stability issues. The main results that follow incorporate several solutions to the delay-plant control design problem and a verification of the proposed algorithms in terms of the closed-loop stability.
Źródło:
Control and Cybernetics; 1999, 28, 2; 291-314
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal control for elasto-orthotropic plate
Autorzy:
Lovišek, J.
Králik, J.
Powiązania:
https://bibliotekanauki.pl/articles/969940.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
control of variational inequalities
elasto-orthotropic plate
optimal design
weight minimization
approximate optimization problem
Opis:
The optimal control problems and a weight minimization problem are considered for elastic three-layered plate with inner obstacle and friction condition on a part of the boundary. The state problem is represented by a variational inequality and the design variables influence both the coefficients and the set of admissible state functions. We prove the existence of a solution to the above-mentioned problem on the basis of a general theorem on the control of variational inequalities. Next, the approximate optimization problem is proved on the basis of the general theorem for the continuous problem. When the mesh/size tends to zero, then any sequence of appropriate solutions converges uniformly to a solution of the continuous problem. Finally, the application to the optimal design of unilaterally supported of rotational symmetrical load elastic annular plate is presented.
Źródło:
Control and Cybernetics; 2006, 35, 2; 219-278
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design Thinking in Pedagogy
Autorzy:
Luka, Ineta
Powiązania:
https://bibliotekanauki.pl/articles/628265.pdf
Data publikacji:
2014
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
design thinking, problem-solving, creativity, innovation, teamwork, skills development
Opis:
The twenty-first century has brought lots of challenges for people in all spheres, including education. In the new context, traditional approaches often seem ineffective and therefore new tools and methods have to be applied. An alternative approach that might be useful in the given context is design thinking – the approach that originated in architecture, design and art, and nowadays is applied in many fields. It is a human-centered problem-solving approach that may be used in the teaching/learning process to develop twenty-first century skills and enhance creativity and innovation. This paper introduces readers to the origin of design thinking, its attributes and processes as well as its application in pedagogy.
Źródło:
Journal of Education Culture and Society; 2014, 5, 2; 63-74
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System zaprojektuj i zbuduj receptą na drogowy sukces?
The Design&Build system as a means of successful road construction project?
Autorzy:
Miciak, J.
Powiązania:
https://bibliotekanauki.pl/articles/364271.pdf
Data publikacji:
2015
Wydawca:
Nowoczesne Budownictwo Inżynieryjne
Tematy:
budownictwo drogowe
system zaprojektuj i zbuduj
inwestycje
problem
inżynieria wartości
road construction
system design and build
investments
issue
value engineering
Opis:
Kolejna perspektywa budżetowa Unii Europejskiej to szansa dla firm budowlanych na nowe lukratywne kontrakty. Z ok. 30 mld € przyznanych Polsce w ramach polityki spójności na realizację projektów infrastrukturalnych sfinansowana zostanie m.in. budowa 71,5 km autostrad, 1790 km dróg ekspresowych oraz 35 obwodnic miast. Duża liczba inwestycji z jednej strony oznacza szybki rozwój i wzrost gospodarczy kraju, a dla przedsiębiorców większe możliwości pozyskania atrakcyjnych zleceń, z drugiej jednak każe nam – nauczonym doświadczeniem poprzedniej perspektywy – spodziewać się problemów niemal na każdym etapie procesu inwestycyjnego, a co za tym idzie, opóźnień w oddaniu gotowych dróg do eksploatacji. Lekarstwem na te bolączki mają być nowe zasady realizacji projektów drogowych, które – zgodnie z założeniami ich pomysłodawców – pozwolą prowadzić działania szybciej, sprawniej i taniej.
Another EU financial framework gives construction companies an opportunity to win lucrative new contracts. The funding from approx. € 30 billion allocated to Poland under the cohesion policy for the implementation of infrastructural projects will cover, among other things, the construction of 71.5 km of motorways, 1790 km of expressways and 35 ring roads. The large number of projects on the one hand means rapid development and eco-nomic growth of the country and more opportunities for businesses to get attractive contracts, but on the other hand, based on the experience from the previous financial framework, we may expect problems at almost every stage of investment process, and thus delays in putting completed roads into service. These ills are to be cured by new rules for the implementation of road projects, which - according to the assumptions of their originators - will allow faster, better and cheaper action.
Źródło:
Nowoczesne Budownictwo Inżynieryjne; 2015, 1; 30-32
1734-6681
Pojawia się w:
Nowoczesne Budownictwo Inżynieryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane problemy projektowe hybrydowego systemu wspomagania decyzji dla służb ratowniczych PSP
The hybrid decision support system for Fire Service – chosen project’s problems
Autorzy:
Mirończuk, Marcin Michał
Maciak, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/41205336.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Kazimierza Wielkiego w Bydgoszczy
Tematy:
system wspomagania decyzji
system ekspertowy
SWD
hybrydowy system wspomagania decyzji
HSWD
model procesu rozwoju solidnego oprogramowania
DFTS
design for trustworthy software
hybrid decision support system
project’s problem of hybrid decision support system
Opis:
W artykule przedstawiono problematykę projektowania modelu hybrydowego systemu wspomagania decyzji dla Państwowej Straży Pożarnej. Do realizacji systemu wybrano metodę projektowania oprogramowania godnego zaufania (ang. design for trustworthy software – DFTS). W artykule w szczególności położono nacisk na omówienie etapu planowania wymagań i projektowania całości proponowanej platformy.
This article describes the process of designing a hybrid decision support system HSWD for the Fire Service. This designing process realize a methodology of design for trustworthy software – DFTS. In this article describes chosen project problems and their solution on the first stage of proposed design process. In this paper authors describe causes and consequences of the absence of certain information solutions in the PSP. Especially authors describe three source like a methodology, environment and user of these causes. These sources at the beginning of the project play a central role. At the beginning of the project the source like a software, hardware and measurement play a less significant role. The authors in detail describe any cause and gave way to its solution.
Źródło:
Studia i Materiały Informatyki Stosowanej; 2014, 15; 11-22
1689-6300
Pojawia się w:
Studia i Materiały Informatyki Stosowanej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization using chaotic neural network and its application to lighting design
Autorzy:
Nanba, R.
Hasegawa, M.
Nishita, T.
Aihara, K.
Powiązania:
https://bibliotekanauki.pl/articles/205753.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
algorytm genetyczny
denaturacja symulowana
grafika komputerowa
metoda energetyczna
model świetlny
sieć neuronowa chaotyczna
zagadnienie optymalizacji kombinatorycznej
chaotic neural networks
combinatorial optimization problem
computer graphics
genetic algorithm
lighting design
radiosity method
simulated annealing
Opis:
We have developed a chaotic neurodynamical searching method for solving the lighting design problems. The goal of this method is to design interior lighting that satisfies required illuminance distribution. We can obtain accurate illuminance distribution by using the radiosity method to calculate interreflection of lights. We formulate the lighting design problem that considers the interreflection of lights as a combinatorial optimization problem, and construct a chaotic neural network which searches the optimum solution of the lighting design problem. The calculated illuminance distribution is visualized using computer graphics. We compare this optimization method with the conventional neural network with gradient dynamics, simulated annealing, and the genetic algorithm, and clarify the effectiveness of the proposed method based on the chaotic neural network.
Źródło:
Control and Cybernetics; 2002, 31, 2; 249-269
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
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