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Wyszukujesz frazę "Dynamic programming" wg kryterium: Temat


Tytuł:
Approximating the solution of a dynamic, stochastic multiple knapsack problem
Autorzy:
Hartman, J. C.
Perry, T. C.
Powiązania:
https://bibliotekanauki.pl/articles/970874.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
programowanie liniowe
dualność
stochastic dynamic programming
approximate dynamic programming
linear programming
duality
Opis:
We model an environment where orders arrive probabilistically over time, with their revenues and capacity requirements becoming known upon arrival. The decision is whether to accept an order, receiving a reward and reserving capacity, or reject an order, freeing capacity for possible future arrivals. We model the dynamic, stochastic multiple knapsack problem (DSMKP) with stochastic dynamic programming (SDP). Multiple knapsacks are used as orders may stay in the system for multiple periods. As the state space grows exponentially in the number of knapsacks and the number of possible orders per period, we utilize linear programming and duality to quickly approximate the end-of-horizon values for the SDP. This helps mitigate end-of-study effects when solving the SDP directly, allowing for the solution of larger problems and leading to increased quality in solutions.
Źródło:
Control and Cybernetics; 2006, 35, 3; 535-550
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic programming approach to shape optimization
Autorzy:
Fulmański, P.
Nowakowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/206302.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
dynamic programming
shape optimization
Opis:
We provide a dynamic programming approach through the level set setting to structural optimization problems. By constructing a dual dynamic programming method we provide the verification theorem for optimal and "−optimal solutions of shape optimization problem.
Źródło:
Control and Cybernetics; 2014, 43, 3; 379-401
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A concept of using a dynamic programming method to optimize an investment portfolio allowing for asymmetric rates of return and a minimum risk portfol
Autorzy:
Tymiński, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/950699.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
optimization
dynamic programming
asymmetry
risk
Opis:
Investment management on the capital market is a complex and multifarious process and the accuracy of decisions is an indispensable condition that an investor needs to fulfill if the expected economic results are to be achieved. The paper presents the concept of the optimization of investment portfolio on the capital market of shares. The maximum value of portfolio quality measure was used as an optimization criterion. It is expressed by the index of variability R/σ of the rate of return for each share in the portfolio. The cumulation of values of R/σ index in the successive years of the investigated period allowed for an econometric estimation of the continuous functions and their maximum. The indexes of asymmetry of rate of return for particular shares in the portfolio were introduced into the functions, which enabled to increase the efficiency of the selection of shares for the portfolio. This, in turn, allowed to achieve the optimum structure of shares in the portfolio.
Źródło:
Financial Sciences. Nauki o Finansach; 2014, 4(21); 52-61
2080-5993
2449-9811
Pojawia się w:
Financial Sciences. Nauki o Finansach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Menu Planning with a Dynamic Goal Programming Approach
Autorzy:
Jridi, Ichraf
Jerbi, Badreddine
Kamoun, Hichem
Powiązania:
https://bibliotekanauki.pl/articles/578574.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Programowanie dynamiczne
Standard
Dynamic Programming
Opis:
Dynamic Goal Programming (DGP) represents an extension of Goal Programming (GP). It is characterized by the importance of time factor in relation to its variables. As a complex decision making problem, Menu Planning Problem (MPP) requires the development of methodologies which are able to combine different and conflicting goals incorporating the dynamic characteristics. The article reviews some of the studies and approaches used in MPP. It deals with the Standard GP model of MPP. It provides a DGP formulation for solving the MPP. An MPP for the hemodialysis (HD) patient is an application that best exemplifies the proposed dynamic formulation.
Źródło:
Multiple Criteria Decision Making; 2018, 13; 74-87
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of optimum cascade of ideal mixing reactors
Autorzy:
Efremov, G.
Geller, J.
Powiązania:
https://bibliotekanauki.pl/articles/298243.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
optimization
cascade reactors
dynamic programming
polymerization
Opis:
It is discussed the using of dynamic programming method to optimize the parameters of the cascade of ideal mixing reactors, which is held isothermal first order reaction. It is found, that the minimum volume of the cascade of reactors corresponds to the minimum residence time of substance in this cascade. The optimum value of residence time for all reactors are equal and all ratio of input and output concentrations are equal, hence, and all volumes of reactors are also equal. A total volume of the cascade of reactors is less than the amount single. Application of the method of dynamic programming is illustrated with an example of the calculation of the polymerization in a cascade of four reactors according to the literature experimental data.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2017, 20(2); 149-160
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method for efficient distribution of means to reduce CO2 emissions in a set of power plants
Autorzy:
Kałuszko, A.
Powiązania:
https://bibliotekanauki.pl/articles/406407.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
CO2 emissions
reduction
dynamic programming
Opis:
A method for the allocation of technologies of reduction of CO2 emission to sources of emissions based on dynamic programming has been described. The purpose of the application of the method was to develop an efficient strategy of allocating financial means for reducing CO2 emissions from a set of coal and lignite fired power plants (carbon dioxide sources) which enables reduction of the total emissions to the required level within a given time horizon, at the minimum cost. The application of the method is illustrated based on the set of the 20 largest Polish coal and lignite fired power plants.
Źródło:
Operations Research and Decisions; 2013, 23, 2; 55-65
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual dynamic approach to shape optimization
Autorzy:
Fulmański, P.
Nowakowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/969944.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
control
deformation
dual dynamic programming
shape functional
Opis:
We consider the control problem with multidimensional integral functional where state and control satisfy a system of the first order hyperbolic PDE. Next, a type of deformation with control of the domain is described and then we define suitable shape functional. Having defined trajectory and control of deformation the dual dynamic programming tools are applied to derive optimality condition for the shape functional with respect to such a deformation.
Źródło:
Control and Cybernetics; 2006, 35, 2; 205-218
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stochastic Orders in Discrete Dynamic Programming
Porządki stochastyczne w dyskretnym programowaniu dynamicznym
Autorzy:
Sitarz, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/904713.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
dynamic programming
partially ordered set
stochastic orders
Opis:
W pracy rozważane jest zadanie optymalizacji dynamicznej z wartościami funkcji kryterium będącymi zmiennymi losowymi. Ściślej opisany jest model dynamiczny ze skończoną liczbą etapów, stanów oraz decyzji. Proces taki oceniany jest ze względu na osiągane wartości zmiennych losowych. Aby można było zastosować zmienne losowe w optymalizacji dynamicznej, muszą one spełniać odpowiednie warunki, co opisane jest w pracy. Podany jest przykład możliwych do wykorzystania porządków stochastycznych, tzw. dominacji stochastycznych.
This paper deals with a problem of dynamic optimization with values of criteria function in the set of the random variables. Precisely, there is a dynamic model with finite number of stages, states and decision variables described. Such a dynamic process is evaluated regarding values of the random variables. The random variables have to fulfil some conditions, if they are to be applied to dynamie optimization. These conditions are described in presented paper. Moreover, there is given a review of stochastic orders, which can be used in the model.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2005, 194
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamie Programming with Returns in Random Variables Spaces
Zmienne losowe w dyskretnym programowaniu dynamicznym
Autorzy:
Sitarz, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/904913.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
dynamic programming
partially ordered set
stochastic dominance
Opis:
This paper presents a model of dynamic, discrete decision-making problem (finite number of periods, states and decision variables). Described process has returns in random variables spaces equipped with partial order. The model can be applied for many multi-stage, multi-criteria decision making problems. There are a lot of order relations to compare random variables. Properties of those structures let us apply Bellman’s Principle of dynamic programming. The result of using this procedure is obtainment of a whole set of optimal values (in the sense of order relation). For illustration, there is presented a numerical example.
W artykule opisano dyskretny model programowania dynamicznego z wartościami funkcji kryterium z przestrzeni zmiennych losowych wyposażonej w częściowy porządek. Opisany proces dynamiczny ma charakter deterministyczny. Porównując zmienne losowe stosowane są różne rodzaje relacji porządkujących. Własności struktur zmiennych losowych pozwalają stosować uogólnioną metodę programowania dynamicznego - tzw. zasadę Bellmana. Efektem tej procedury jest uzyskanie pełnego zbioru wartości optymalnych (w sensie relacji częściowego porządku). Analogicznie, jak w programowaniu wielokryterialnym, tak i tu rozwiązaniem problemu optymalizacyjnego może być duży zbiór wartości optymalnych. Przedstawione są metody zawężające ten zbiór, wykorzystujące dynamiczną postać zadania oraz własności zmiennych losowych.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2004, 175
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Canonical greedy algorithms and dynamic programming
Autorzy:
Lew, A.
Powiązania:
https://bibliotekanauki.pl/articles/970856.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
programowanie dynamiczne
Dijkstra
greedy algorithm
dynamic programming
Opis:
There has been little work on how to construct greedy algorithms to solve new optimization problems efficiently. Instead, greedy algorithms have generally been designed on an ad hoc basis. On the other hand, dynamic programming has a long history of being a useful tool for solving optimization problems, but is often inefficient. We show how dynamic programming can be used to derive efficient greedy algorithms that are optimal for a wide variety of problems. This approach also provides a way to obtain less efficient but optimal solutions to problems where derived greedy algorithms are nonoptimal.
Źródło:
Control and Cybernetics; 2006, 35, 3; 621-643
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Viscosity solutions of the Isaacs equation οn an attainable set
Autorzy:
Zaremba, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/1340598.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Isaacs equation
dynamic programming
differential game
viscosity solution
Opis:
We apply a modification of the viscosity solution concept introduced in [8] to the Isaacs equation defined on the set attainable from a given set of initial conditions. We extend the notion of a lower strategy introduced by us in [17] to a more general setting to prove that the lower and upper values of a differential game are subsolutions (resp. supersolutions) in our sense to the upper (resp. lower) Isaacs equation of the differential game. Our basic restriction is that the variable duration time of the game is bounded above by a certain number T>0. In order to obtain our results, we prove the Bellman optimality principle of dynamic programming for differential games.
Źródło:
Applicationes Mathematicae; 1993-1995, 22, 2; 181-192
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Time Warping Algorithms for Rail Vehicle Velocity Estimation in Low Speed Scenarios
Autorzy:
Hensel, S.
Marinov, M. B.
Powiązania:
https://bibliotekanauki.pl/articles/221440.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
velocity estimation
cross-correlation
dynamic programming
eddy current sensors
Opis:
Precise measurement of rail vehicle velocities is an essential prerequisite for the implementation of modern train control systems and the improvement of transportation capacity and logistics. Novel eddy current sensor systems make it possible to estimate velocity by using cross-correlation techniques, which show a decline in precision in areas of high accelerations. This is due to signal distortions within the correlation interval. We propose to overcome these problems by employing algorithms from the field of dynamic programming. In this paper we evaluate the application of correlation optimized warping, an enhanced version of dynamic time warping algorithms, and compare it with the classical algorithm for estimating rail vehicle velocities in areas of high accelerations and decelerations.
Źródło:
Metrology and Measurement Systems; 2017, 24, 1; 161-173
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
(s,S)-type policy for a production inventory problem with limited backlogging and with stockouts
Autorzy:
Rempała, Ryszarda
Powiązania:
https://bibliotekanauki.pl/articles/1339233.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
(s,S)-policy
inventory
dynamic programming
limited backlogging
k-convexity
Opis:
A production inventory problem with limited backlogging and with stockouts is described in a discrete time, stochastic optimal control framework with finite horizon. It is proved by dynamic programming methods that an optimal policy is of (s,S)-type. This means that in every period the policy is completely determined by two fixed levels of the stochastic inventory process considered.
Źródło:
Applicationes Mathematicae; 1996-1997, 24, 3; 343-354
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Memoization method for storing of minimum-weight triangulation of a convex polygon
Autorzy:
Selimi, Aybeyan
Krrabaj, Samedin
Saracevic, Muzafer
Pepić, Selver
Powiązania:
https://bibliotekanauki.pl/articles/305479.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
minimum-weight triangulation
catalan number
data storage
memoization
dynamic programming
Opis:
This study presents a practical view of dynamic programming, specifically in the context of the application of finding the optimal solutions for the polygon triangulation problem. The problem of the optimal triangulation of polygon is considered to be as a recursive substructure. The basic idea of the constructed method lies in finding to an adequate way for a rapid generation of optimal triangulations and storing - them in as small as possible memory space. The upgraded method is based on a memoization technique, and its emphasis is in storing the results of the calculated values and returning the cached result when the same values again occur. The significance of the method is in the generation of the optimal triangulation for a large number of n. All the calculated weights in the triangulation process are stored and performed in the same table. Results processing and implementation of the method was carried out in the Java environment and the experimental results were compared with the square matrix and Hurtado-Noy method.
Źródło:
Computer Science; 2019, 20 (2); 195-211
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An approximate dynamic programming approach for semi-cooperative multi-agent resource management
Autorzy:
Boukhtouta, A.
Berger, J.
George, A.
Powell, W. B.
Powiązania:
https://bibliotekanauki.pl/articles/1396741.pdf
Data publikacji:
2012
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
approximate dynamic programming
agent
semi-cooperative
multi-agent
resource management
Opis:
Complex problems involving multiple agents exhibit varying degrees of cooperation. The levels of cooperation might reflect both differences in information as well as differences in goals. In this research, we develop a general mathematical model for distributed, semicooperative planning and suggest a solution strategy which involves decomposing the system into subproblems, each of which is specified at a certain period in time and controlled by an agent. The agents communicate marginal values of resources to each other, possibly with distortion. We design experiments to demonstrate the benefits of communication between the agents and show that, with communication, the solution quality approaches that of the ideal situation where the entire problem is controlled by a single agent.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2012, 2, 3; 201-214
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł

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