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    Wyświetlanie 1-23 z 23
    Tytuł:
    Multi - criteria decision making using fuzzy preference relations
    Autorzy:
    Borzęcka, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/406292.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fuzzy sets
    optimization
    Pareto-optimal set
    Opis:
    When dealing with multi-criteria decision making problems, the concept of Pareto-optimality and Pareto-dominance may be inefficient (e.g. generally multiple solutions exist), especially when there is a large number of criteria. Our paper considers the fuzzy multi-criteria decision making problem based on Zadeh’s linguistic approach to P-optimality and P-dominance. The construction, analysis and application of a model of multi-criteria decision making using a fuzzy preference relation are considered. The paper is dedicated to the problem of modeling preferences in terms of fuzzy binary relations and provides an introduction to the important problem of forming fuzzy preference relations to analyze models of multi-attribute decision making. The key features of the multi-criteria evaluation, comparison, choice and ordering of alternatives in a fuzzy environment using fuzzy preference relations have been introduced.
    Źródło:
    Operations Research and Decisions; 2012, 22, 3; 5-21
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pareto optimal control problem and its Galerkin approximation for a nonlinear one-dimensional extensible beam equation
    Autorzy:
    Just, A.
    Stempień, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/255243.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    nonlinear beam equation
    Pareto optimal control
    Galerkin approximation
    Opis:
    Our goal is to study the Pareto optimal control system for a nonlinear one-dimensional extensible beam equation and its Galerkin approximation. First we consider a mathematical model of the beam equation which was obtained by S. Woinowsky-Krieger in 1950. Next we consider the Pareto optimal control problem based on this equation. Further, we describe the approximation of this system. We use the Galerkin method to approximate the solution of this control problem with respect to a spatial variable. Based on the standard finite dimensional approximation we prove that as the discretization parameters tend to zero then the weak accumulation point of the solutions of the discrete optimal control problems exist and each of these points is the solution of the original Pareto optimal control problem.
    Źródło:
    Opuscula Mathematica; 2016, 36, 2; 239-252
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optymalizacja konstrukcji pojemnościowego ogrzewacza wody
    Optimization of a storage water heater construction
    Autorzy:
    Chamera, S.
    Maciejewski, I.
    Krzyżyński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/153778.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    optymalizacja
    rozwiązanie Pareto-optymalne
    energooszczędność
    optimization
    Pareto optimal solution
    energy saving
    Opis:
    W artykule przedstawiono optymalizację elementów konstrukcji pojemnościowego ogrzewacza wody. Kryteria optymalizacji to minimalizacja zużycia energii oraz kosztów materiałowych elementów konstrukcyjnych ogrzewacza, decydujących o zużyciu energii. Rozwiązania Pareto-optymalne przedstawione są w postaci punktów, które decydują o wartościach pięciu zmiennych decyzyjnych. Przedstawiony algorytm optymalizacyjny może posłużyć do wspomagania konstruowania optymalnych w sensie kosztów wytworzenia i energooszczędności pojemnościowych urządzeń grzewczych.
    The paper presents optimization of elements in a storage water heater construction. Two optimization criteria are taken into account: energy saving and minimum costs of materials, used in the construction of a water heater. The construction elements used in a heater have significant influence on the value of energy consumption. Basic construction elements of the storage water heater are shortly described. Fundamental physical and mechanical properties of selected materials used in a thermal insulation of the heaters are shown. The optimization task is delineated and an object of the optimization is also schematically presented. Additionally, the paper contains a mathematical model of the optimization and a range of decision variables. The Pareto-optimal solution points are calculated. These points decide on the values of five decision variables. When designing the storage water heater appliances, these optimization algorithms can be used to get the optimal material costs and energy saving. The paper is strictly focused on the cost of the materials used, not the cost of the heater manufacturing itself. Additional costs can be added by processing the considered material, for example polyurethane foam or by performing foamed polystyrene molders - properly to heater dimensions. The scale of additional costs surely depends on an output volume and technical capacities of a manufacturing plant - for example the size of machine park. Additional costs related to specific construction materials can be analyzed in other, individual consideration.
    Źródło:
    Pomiary Automatyka Kontrola; 2011, R. 57, nr 11, 11; 1425-1427
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimality conditions in multiobjective programming problems with interval valued objective functions
    Autorzy:
    Ahmad, I.
    Singh, D.
    Dar, B. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/206566.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    interval valued functions
    gH-differentiablity
    Pareto optimal solutions
    pseudoconvexity
    KKT optimality conditions
    Opis:
    We devote this paper to study of multiobjective programming problems with interval valued objective functions. For this, we consider two order relations LU and LS on the set of all closed intervals and propose several concepts of Pareto optimal solutions and generalized convexity. Based on generalized convexity (viz. LU and LS-pseudoconvexity) and generalized differentiability (viz. gHdifferentiablity) of interval valued functions, the KKT optimality conditions for aforesaid problems are obtained. The theoretical development is illustrated by suitable examples.
    Źródło:
    Control and Cybernetics; 2015, 44, 1; 19-45
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    How Quantum Prisoner’s Dilemma Can Support Negotiations
    Autorzy:
    Szopa, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/430038.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
    Tematy:
    game theory
    quantum game
    prisoner’s dilemma
    Nash equilibrium
    Pareto optimal solutions
    Opis:
    Decision-making by the two negotiating parties is simulated by a prisoner’s dilemma game. The game is formulated in a quantum manner, where players strategies are unitary transformations of qubits built over the basis of opposite decision options. Quantum strategies are correlated through the mechanism of quantum entanglement and the result of the game is obtained by the collapse of the resulting transformed state. The range of strategies allowed for quantum players is richer than in case of a classical game and therefore the result of the game can be better optimized. On the other hand, the quantum game is save against eavesdropping and the players can be assured that this type of quantum arbitration is fair. We show that quantum prisoner’s dilemma has more favorable Nash equilibria than its classical analog and they are close to the Pareto optimal solutions. Some economical examples of utilizing quantum game Nash equilibria are proposed.
    Źródło:
    Optimum. Economic Studies; 2014, 5(71)
    1506-7637
    Pojawia się w:
    Optimum. Economic Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of poli-criterial linearization for control problem of stochastic dynamic systems
    Zastosowanie wielokryterialnej linearyzacji w problemie sterowania stochastycznych nieliniowych układów dynamicznych
    Autorzy:
    Socha, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/279864.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    Stochastic control of nonlinear systems
    LQG control problem
    stochastic linearization
    Pareto optimal solution
    Opis:
    The problem of the determination of response characteristics and quasi-optimal control for nonlinear stochastic dynamic systems by using a multi-criteria linearization technique is presented in this paper. This idea was first introduced in previous author's paper (Socha, 1999a) for a simple dynamic system. In this paper, it is extended, and detailed analysis is given for a nonlinear oscillator with Gaussian external excitations and for a few criteria of statistical linearization. The obtained results are illustrated by a numerical example for Duffing's oscillator.
    W pracy przedstawiono problem wyznaczania quasi-optymalnego sterowania w nieliniowych stochastycznych układach dynamicznych za pomocą wielokryterialnej metody linearyzacji stochastycznej. Pomysł wielokryterialnej linearyzacji został zasygnalizowany we wcześniejszej pracy autora (Socha, 1999a). W niniejszym artykule jest on rozwinięty i zastosowany do problemu sterowania, a szczegółowa analiza jest przeprowadzona dla nieliniowego oscylatora z addytywnym wymuszeniem Gaussa.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2005, 43, 3; 675-693
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On localizing global Pareto solutions in a given convex set
    Autorzy:
    Drwalewska, Agnieszka
    Gajek, Lesław
    Powiązania:
    https://bibliotekanauki.pl/articles/1338686.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    sufficient and necessary conditions for optimality
    Pareto optimal solutions
    dual cones
    feasible directions
    Opis:
    Sufficient conditions are given for the global Pareto solution of the multicriterial optimization problem to be in a given convex subset of the domain. In the case of maximizing real valued-functions, the conditions are sufficient and necessary without any convexity type assumptions imposed on the function. In the case of linearly scalarized vector-valued functions the conditions are sufficient and necessary provided that both the function is concave and the scalarization is increasing with respect to the cone generating the preference relation.
    Źródło:
    Applicationes Mathematicae; 1999, 26, 4; 383-394
    1233-7234
    Pojawia się w:
    Applicationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Projektowanie rynków w oparciu o algorytmy kojarzenia
    Market design by matching algorithms
    Autorzy:
    Szopa, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/591646.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    Pareto optymalność
    Rynki kojarzenia
    Stabilne dopasowanie
    Wymiana nerek
    Kidney exchange
    Matching markets
    Pareto optimal
    Stable matching
    Opis:
    W pracy przedstawiono teorię stabilnego dopasowania algorytmu odroczonej akceptacji (AOA) oraz algorytmy TTC i TTCC wraz z ich zastosowaniami do np. kojarzenia uczelni i studentów, domów i właścicieli czy dawców i biorców nerek do przeszczepu. Dzięki tym algorytmom można projektować tzw. rynki kojarzenia, dla których optymalna alokacja dóbr jest możliwa bez wykorzystania mechanizmów finansowych charakterystycznych dla rynków towarowych. Omówiono właściwości algorytmów kojarzenia, m.in. ich stabilność, Pareto optymalność i odporność na manipulacje, oraz cechy algorytmu TTCC, dzięki którym krzyżowe transplantacje można zastąpić łańcuchowymi, co dzięki osiągnięciu głębszego rynku, pozwala na bardziej optymalne wykorzystanie nerek do przeszczepu.
    The paper presents the theory of stable allocations of deferred acceptance algorithms (DAA), as well as TTC and TTCC algorithms together with their applications to matching, e.g. universities and students, homes and owners or donors and transplant patients. These algorithms design so-called matching markets, for which optimal allocation of goods is possible without the use of financial mechanisms specific to commodity markets. Discussed are properties of matching algorithms: their stability, Pareto’s optimality and resistance to manipulation. The TTCC algorithm allows to replace the pairwise exchange by the chain exchange transplantations, which due to the thickness of market improve match quality of transplanted kidneys.
    Źródło:
    Studia Ekonomiczne; 2018, 364; 167-184
    2083-8611
    Pojawia się w:
    Studia Ekonomiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spacecraft attitude fault tolerant control based on multi-objective optimization
    Autorzy:
    Moradi, Rouzbeh
    Alikhani, Alireza
    Fathi Jegarkandi, Mohsen
    Powiązania:
    https://bibliotekanauki.pl/articles/1839618.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    active fault-tolerant control
    spacecraft attitude control
    finite time convergence
    Pareto-optimal set
    Opis:
    An active fault tolerant controller is designed for the attitude control of a faulty spacecraft. Feedback linearization and Lyapunov’s direct method are used to solve angular velocity equations and to ensure convergence of the system outputs to reference inputs, respectively. In order to ensure finite time convergence, final time constraints are proposed. Three con- structive objective functions are considered as performance measures and optimized using multi-objective optimization. The results show that the outputs converge to the reference attitudes, even for severe actuator faults/failures.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2020, 58, 4; 983-996
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The optimal design of fractional sliding mode control based on multi-objective genetic algorithms for a two-link flexible manipulator
    Autorzy:
    Pouya, M.
    Pashaki, P. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/102531.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    fractional calculations
    sliding mode control
    two-link flexible manipulator
    Pareto optimal
    genetic algorithm
    Opis:
    In this paper a novel optimal approach of control strategy is introduced by applying fractional calculus in the structure of sliding mode control for a range of dynamics system liable to ambiguity. So, a fractional sliding mode control was designed for dynamics of the two-link rigid-flexible manipulator. Furthermore, a multi-objective genetic algorithm was proposed in order to find the ideal variable structure of the sliding mode control. Optimal variables were achieved by the optimization of the conventional sliding mode control. Then the performance of both the conventional and the fractional sliding mode control were compared with respect to optimal variables. Results indicated that by applying the optimized fractional sliding mode control, the system’s error was significantly reduced consequently tracking the desired value was done with a higher degree of accuracy and a smoother control action was achieved.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 3; 56-65
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    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:
    The stability radius of an efficient solution in minimax Boolean programming problem
    Autorzy:
    Emelichev, V. A.
    Krichko, V. N.
    Nikulin, Y. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/970431.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    analiza wrażliwości
    promień stabilny
    programowanie Boole'a
    rozwiązanie optymalne Pareto
    sensitivity analysis
    stability radius
    Boolean programming
    Pareto optimal solution
    Opis:
    We consider a vector minimax Boolean programming problem. The problem consists in finding the set of Pareto optimal solutions. When the problem's parameters vary then the optimal solution of the problem obtained for some initial parameters may appear non-optimal. We calculate the maximal perturbation of parameters which preseves the Optimality of a given solution of the problem. The formula for the stability radius of the given Pareto optimal solution was obtained.
    Źródło:
    Control and Cybernetics; 2004, 33, 1; 127-132
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Redukcja hałasu w pomieszczeniu z zaburzeniem wibroakustycznym poprzez optymalny rozkład materiału dźwiękochłonnego
    Noise reduction in a room with vibroacoustic disturbance by the optimal absorptive material distribution
    Autorzy:
    Błażejewski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/153480.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    akustyka
    amplitudy modalne
    optymalizacja
    algorytmy genetyczne
    zbiór rozwiązań Pareto-optymalnych
    acoustics
    modal amplitudes
    optimization
    genetic algorithms
    Pareto-optimal set
    Opis:
    Praca dotyczy zagadnienia rozmieszczenia porowatego materiału absorbującego o zespolonej impedancji akustycznej na brzegach obszaru (pomieszczenia), w którym umieszczone zostało harmoniczne źródło wibroakustyczne. Uproszczony model rozkładu ciśnienia akustycznego w pomieszczeniu uzyskano stosując analizę modalną. Do rozwiązania problemu optymalizacji wykorzystano algorytm genetyczny. Połączenie uproszonego modelu oraz algo-rytmu genetycznego, pozwala na znaczne szybsze i mniej kosztowne obliczeniowo, uzyskiwanie wyników optymalizacji, w postaci rozkładu materiału absorpcyjnego w pomieszczeniu.
    In the paper a problem how to properly influence an acoustic field in the enclosure with a Vibro-acoustical source [1] inside is considered. Particularly, optimization of the configuration of an acoustic absorber, i.e. porous material characterized by a complex impedance on the boundary, is presented [2]. The combination of the modal approach to modeling of the room acoustic field and the artificial intelligence methods to the optimization is a new attitude to the problem. In order to describe the acoustic pressure distribution inside the enclosure, the modal analysis with modal coupling was applied and presented in Section 2. In this case the acoustic pressure distribution in the room is a sum over a set of the room eigenfunctions and proper time components i.e. modal amplitudes [2, 3]. The formulae describing these amplitudes were obtained and eventually introduced into the multi-objective function definition [2, 4] in Section 3. The acoustic impedances on the room boundaries correlated with the material thickness were selected as design variables. In order to solve the optimization problem defined in Section 3 directly, a genetic algorithm was applied. The non-dominated solutions were searched in the process [2, 4, 5, 6]. The main ingredients of the algorithm and its settings are described in Section 4. In Section 5 the example object (room) is specified and shown in detail in Tab. 1. Applying a specific acoustic absorber on the boundary [2, 7], the room with the harmonic source was modified according to the optimization method. As the result, the set of the Pareto-optimal solutions was obtained (see Fig. 1). One solution of the Pareto set was selected and corresponding, particular boundaries covering with the acoustic absorber are shown in Fig. 2. Last, the model accuracy and the optimization results, i.e. noise reduction, are presented in Figs. 3a and 3b. The result verification was performed by comparison with the acoustic measurements (see Figs. 3c and 3d).
    Źródło:
    Pomiary Automatyka Kontrola; 2012, R. 58, nr 6, 6; 536-539
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of monotonicity properties of some rule interestingness measures
    Autorzy:
    Greco, S.
    Słowiński, R.
    Szczęch, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839193.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    association rules
    Piatetsky-Shapiro's rule interest function
    gain measure
    dependency factor
    anti-support
    Pareto-optimal border
    Opis:
    One of the crucial problems in the field of knowledge discovery is development of good interestingness measures for evaluation of the discovered patterns. In this paper, we consider quantitative, objective interestingness measures for "if..., then... " association rules. We focus on three popular interestingness measures, namely rule interest function of Piatetsky-Shapiro, gain measure of Fukuda et al., and dependency factor used by Pawlak. We verify whether they satisfy the valuable property M of monotonic dependency on the number of objects satisfying or not the premise or the conclusion of a rule, and property of hypothesis symmetry (HS). Moreover, analytically and through experiments we show an interesting relationship between those measures and two other commonly used measures of rule support and anti-support.
    Źródło:
    Control and Cybernetics; 2009, 38, 1; 9-25
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of multi-objective fruit fly optimisation algorithm based on population Manhattan distance in distribution network reconfiguration
    Autorzy:
    Tang, Minan
    Zhang, Kaiyue
    Wang, Qianqian
    Cheng, Haipeng
    Yang, Shangmei
    Du, Hanxiao
    Powiązania:
    https://bibliotekanauki.pl/articles/1841286.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Chebyshev chaotic mapping
    distributed generation
    distribution network reconfiguration
    fuzzy decision method
    Pareto optimal
    pmdMOFOA
    population Manhattan distance
    Opis:
    In order to optimise the operation state of the distribution network in the presence of distributed generation (DG), to reduce network loss, balance load and improve power quality in the distribution system, a multi-objective fruit fly optimisation algorithm based on population Manhattan distance (pmdMOFOA) is presented. Firstly, the global and local exploration abilities of a fruit fly optimisation algorithm (FOA) are balanced by combining population Manhattan distance (PMD) and the dynamic step adjustment strategy to solve the problems of its weak local exploration ability and proneness to premature convergence. At the same time, Chebyshev chaotic mapping is introduced during position update of the fruit fly population to improve ability of fruit flies to escape the local optimum and avoid premature convergence. In addition, the external archive selection strategy is introduced to select the best individual in history to save in external archives according to the dominant relationship amongst individuals. The leader selection strategy, external archive update and maintenance strategy are proposed to generate a Pareto optimal solution set iteratively. Lastly, an optimal reconstruction scheme is determined by the fuzzy decision method. Compared with the standard FOA, the average convergence algebra of a pmdMOFOA is reduced by 44.58%. The distribution performance of non-dominated solutions of a pmdMOFOA, MOFOA, NSGA-III and MOPSO on the Pareto front is tested, and the results show that the pmdMOFOA has better diversity. Through the simulation and analysis of a typical IEEE 33-bus system with DG, load balance and voltage offset after reconfiguration are increased by 23.77% and 40.58%, respectively, and network loss is reduced by 57.22%, which verifies the effectiveness and efficiency of the proposed method.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 2; 307-323
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graph Theory Approach to Transportation Systems Design and Optimization
    Autorzy:
    Guze, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/117201.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    graph theory
    Transportation System
    Transportation System Design
    Transportation Systems Optimization
    SPEA Algorithm
    Pareto optimal
    Multicriteria Optimisation
    optimization
    Opis:
    The main aim of the paper is to present graph theory parameters and algorithms as tool to analyze and to optimise transportation systems. To realize these goals the 0-1 knapsack problem solution by SPEA algorithm, methods and procedures for finding the minimal spanning tree in graphs and digraphs, domination parameters problems accurate to analyse the transportation systems are introduced and described. Possibility of application of graph theory algorithms and parameters to analyze exemplary transportation system are shown.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8 no. 4; 572-578
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heuristic Method of Safe Manoeuvre Selection Based on Collision Threat Parameters Areas
    Autorzy:
    Szlapczynska, J.
    Szlapczynski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/117077.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    heuristic method
    collision risk
    collision avoidance
    CTPA (Collision Threat Parameters Area)
    safe manoeuvre selection
    manoeuvring
    colregs
    pareto optimal
    Opis:
    This paper is a continuation of papers dedicated to a radar-based CTPA (Collision Threat Parameters Area) display designed to support safe manoeuvre selection. The display visualizes all the ships in an encounter and presents situational overview from the own ship's point of view. It calculates and displays information on unsafe or unrealistic own ship's course & speed allowing a user to select a safe manoeuvre. So far only the manual selection was possible, thus the paper aims at presenting a heuristic approach towards the manoeuvre selection when using the display.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 4; 591-596
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compromise of two-criteria final payoff of the game ship control in collision situations
    Autorzy:
    Lisowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1841477.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    collision situation
    pareto optimal
    multi-criteria static optimization
    bentham's utilitarian rule
    Salukvadze's Benchmark
    benson's weighted sums
    haimes's constraints
    Opis:
    The essence of the article is the use of multi-criteria static optimization of object motion, based on a set of optimal Pareto points in the space of possible variants of solutions for a new approach to the problem as a game control. Using the example of the two-criteria optimization of the final payoff of the object game control during the safe evasion of the encountered objects, six methods of multi-criteria static optimization are presented—Bentham's utilitarian rule, Rawls's principle of justice, Salukvadze's benchmark, Benson's weighted sums, Haimes's constraints, and goal-oriented programming. In the end, the results obtained by the two-criteria optimization are compared with regard to the values of the components of the final game payoff—the risk of collision and the deviation of the object from the safe route of the set trajectory of movement. The directions for the development of multi-criteria optimization methods, both static and dynamic, and the game are indicated.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 2; 455-461
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A communication network routing problem: Modeling and optimization using non-cooperative game theory
    Autorzy:
    Dubey, Sapana P.
    Kedar, Ganesh D.
    Ghate, Suresh H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1838181.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    communication network
    routing problem
    game theory
    focal points
    Nash equilibrium
    Pareto optimal solution
    sieć komunikacyjna
    teoria gier
    punkt ogniskowy
    równowaga Nasha
    Opis:
    We consider a communication network routing problem wherein a number of users need to efficiently transmit their throughput demand in the form of data packets (incurring less cost and less delay) through one or more links. Using the game theoretic perspective, we propose a dynamic model which ensures unhindered transmission of data even in the case where the capacity of the link is exceeded. The model incorporates a mechanism in which users are appropriately punished (with additional cost) when the total data to be transmitted exceeds the capacity of the link. The model has multiple Nash equilibrium points. To arrive at rational strategies, we introduce the concept of focal points and get what is termed focal Nash equilibrium (FNE) points for the model. We further introduce the concept of preferred focal Nash equilibrium (PFNE) points and find their relation with the Pareto optimal solution for the model.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 155-164
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bayesian Control of a Discrete-Time Linear System with Uniformly Distributed Disturbances
    Autorzy:
    Walczak, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/747940.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Matematyczne
    Tematy:
    Bayes control, optimal, singular system, disturbances, Pareto distribution, adaptive control
    Sterowanie bayesowskie, zakłócenia, rozkład jednostajny, rozkład Pareto, rozkłady sprzężone
    Opis:
    W pracy tej rozważa się zagadnienie sterowania optymalnego liniowym systemem dynamicznym z dyskretnym czasem, przy addytywnych zakłóceniach.  Zakłócenia są niezależnymi zmiennymi losowymi o jednakowym rozkładzie podanym z dokładnością do parametru. Sterowanie odbywa się w układzie zamkniętym.  Funkcja strat to nieujemnie określona forma kwadratowa zależna od stanu systemu i zastosowanego sterowania.  Horyzont sterowania jest ograniczoną zmienną losową o znanym rozkładzie, niezależną od zakłóceń, a pomiary stanu nie są obarczone błędem.  Wykorzystując metodę programowania dynamicznego wyznaczono analityczną postać algorytmu bayesowskiego sterowania optymalnego w układzie zamkniętym: dla zakłóceń  o rozkładzie jednostajnym na [0, λ] oraz dla zakłóceń o rozkładzie jednostajnym na [λ1,  λ2].
    The main objective of this article is to develop Bayesian optimal control for a class of linear stochastic discrete time systems. By taking into consideration that the disturbances in the system are given by a random variable having an uniform distribution with a natural parameter, we prove that the Bayes control
    Źródło:
    Mathematica Applicanda; 2015, 43, 2
    1730-2668
    2299-4009
    Pojawia się w:
    Mathematica Applicanda
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal Labour Income Taxation in Poland: The Case of High-Income Earners
    Optymalne opodatkowanie dochodów z pracy w Polsce – przypadek osób o wysokich dochodach
    Autorzy:
    Dudek, Maciej
    Dudek, Paweł
    Walczyk, Konrad
    Powiązania:
    https://bibliotekanauki.pl/articles/2182067.pdf
    Data publikacji:
    2023-03-31
    Wydawca:
    Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
    Tematy:
    dobrobyt społeczny
    efektywność ekonomiczna
    rozkład Pareto
    podatek optymalny
    social welfare
    economic efficiency
    Pareto distribution
    optimal taxation
    Opis:
    In this paper, we use actual data provided by the Polish tax authority and characterise the properties of income distribution in Poland in the case of high-income earners. By employing a variety of techniques we are able to confirm that the distribution of income in Poland can be approximated with a Pareto distribution in its upper tail. This finding makes the formula for the optimal marginal tax rates of Saez [2001] applicable to the Polish case and allows us to provide estimates of the optimal marginal tax rates for Poland. We show that the current tax policy in Poland is not optimal. Specifically, we show, by relying on empirically viable estimates of the elasticity of the labour supply with respect to the wage, that the optimal marginal tax rate at high income levels exceeds 60%. In other words, we suggest that there is room for a welfare-improving reform in Poland, and we argue that high-income individuals should be expected to contribute substantially more at the margin than they currently do.
    Na podstawie analizy danych pochodzących z zeznań podatkowych można dowieść, że faktyczny rozkład dochodów osób o wysokich dochodach w Polsce może być dostatecznie dobrze przybliżony przez rozkład Pareto. Oznacza to, że do wyznaczenia optymalnej, krańcowej stopy podatku dochodowego można użyć formuły Saeza [2001]. Z analizy wynika, że obecna taryfa opodatkowania wynagrodzeń w Polsce nie jest optymalna. Jeśli uznać znane szacunki płacowej elastyczności podaży pracy za wiarygodne, optymalna stawka podatku od dochodów z pracy powinna przekroczyć 60%. Inaczej mówiąc, istnieje pole do poprawy efektywności systemu opodatkowania wynagrodzeń w Polsce poprzez podwyższenie krańcowej stopy podatku dla osób o najwyższych dochodach.
    Źródło:
    Gospodarka Narodowa. The Polish Journal of Economics; 2023, 313, 1; 41-65
    2300-5238
    Pojawia się w:
    Gospodarka Narodowa. The Polish Journal of Economics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability kernel in finite games with perturbed payoffs
    Autorzy:
    Emelichev, Vladimir
    Nikulin, Yury
    Powiązania:
    https://bibliotekanauki.pl/articles/2183484.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    post-optimal analysis
    multiple criteria
    kernel stability radius
    independent perturbations
    finite games
    Pareto optimality
    Nash equilibrium
    Opis:
    The parametric concept of equilibrium in a finite cooperative game of several players in a normal form is introduced. This concept is defined by the partitioning of a set of players into coalitions. Two extreme cases of such partitioning correspond to Pareto optimal and Nash equilibrium outcomes, respectively. The game is characterized by its matrix, in which each element is a subject for independent perturbations., i.e. a set of perturbing matrices is formed by a set of additive matrices, with two arbitrary Hölder norms specified independently in the outcome and criterion spaces. We undertake post-optimal analysis for the so-called stability kernel. The analytical expression for supreme levels of such perturbations is found. Numerical examples illustrate some of the pertinent cases.
    Źródło:
    Control and Cybernetics; 2022, 51, 1; 6--20
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved Differential Evolution Algorithm to solve multi-objective of optimal power flow problem
    Autorzy:
    Al-Kaabi, Murtadha
    Hasheme, Jaleel Al
    Al-Bahrani, Layth
    Powiązania:
    https://bibliotekanauki.pl/articles/2135728.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Multi-objective Improved Differential Evolution Algorithm
    MOIDEA
    optimal power flow
    OPF
    set of Pareto front solutions
    multi-objective function problems
    fuel costs considering emissions
    fuel costs considering real power losses
    fuel costs considering voltage deviation
    Opis:
    This article presents a new efficient optimization technique namely the Multi- Objective Improved Differential Evolution Algorithm (MOIDEA) to solve the multiobjective optimal power flow problem in power systems. The main features of the Differential Evolution (DE) algorithm are simple, easy, and efficient, but sometimes, it is prone to stagnation in the local optima. This paper has proposed many improvements, in the exploration and exploitation processes, to enhance the performance of DE for solving optimal power flow (OPF) problems. The main contributions of the DE algorithm are i) the crossover rate will be changing randomly and continuously for each iteration, ii) all probabilities that have been ignored in the crossover process have been taken, and iii) in selection operation, the mathematical calculations of the mutation process have been taken. Four conflicting objective functions simultaneously have been applied to select the Pareto optimal front for the multi-objective OPF. Fuzzy set theory has been used to extract the best compromise solution. These objective functions that have been considered for setting control variables of the power system are total fuel cost (TFC), total emission (TE), real power losses (RPL), and voltage profile (VP) improvement. The IEEE 30-bus standard system has been used to validate the effectiveness and superiority of the approach proposed based on MATLAB software. Finally, to demonstrate the effectiveness and capability of the MOIDEA, the results obtained by this method will be compared with other recent methods.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 3; 641--657
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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