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Wyszukujesz frazę "necessary conditions" wg kryterium: Temat


Tytuł:
Normality of the maximum principle for absolutely continuous solutions to Bolza problems under state constraints
Autorzy:
Frankowska, H.
Tematy:
optimal control
maximum principle under state constraints
normal necessary conditions
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Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:
https://bibliotekanauki.pl/articles/970777.pdf  Link otwiera się w nowym oknie
Opis:
It is well known that for a Bolza optimal control problem under state constraints every local minimizer satisfies a constrained maximum principle which may be degenerate. In the recent years several researchers proposed sufficient conditions for its nondegeneracy, e.g. Arutyanov and Assev (1997), Rampazzo and Vinter (1999, 2000), Galbraith and Vinter (2003). In all these papers the most important assumption links dynamics of a control system with tangent cones to constraints. It is the so called inward pointing condition of control theory that is in the same spirit with the well known Slater and Managasarian-Fromowitz conditions of mathematical programming. We propose here two sufficient conditions for normality when the boundary of constraints is C1 and the end point is free. The first one applies to every nondegenerate maximum principle without any assumptions on the initial state. The second one applies to every maximum principle, but involves an additional assumption on the initial conditions.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Second-order necessary conditions for discrete inclusions with end point constraints
Autorzy:
Cernea, Aurelian
Tematy:
tangent cone
discrete inclusion
necessary optimality conditions
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Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Powiązania:
https://bibliotekanauki.pl/articles/729636.pdf  Link otwiera się w nowym oknie
Opis:
We study an optimization problem given by a discrete inclusion with end point constraints. An approach concerning second-order optimality conditions is proposed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Necessary optimality conditions for nonsmooth two-dimensional control systems described by Roessers model
Autorzy:
Studniarski, M.
Tematy:
sterowanie optymalne
generalized gradients
necessary conditions
optimal control
two-dimensional discrete systems
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Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:
https://bibliotekanauki.pl/articles/206015.pdf  Link otwiera się w nowym oknie
Opis:
Necessary optimality conditions for nonlinear nonsmooth two-dimensional discrete control systems are derived. Under additional convexity assumptions, these conditions can be obtained in the form of a maximum principle. For some special cases, sufficient optimality conditions are also presented.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strategy frames in coopetition : an examination of coopetition entry factors in high-tech firms
Autorzy:
Fredrich, Viktor
Czakon, Wojciech
Klimas, Patrycja
Opis:
Collaboration with competitors offers unique advantages such as increasing market, innovation, and financial performance. However, the degree of coopetition adoption varies between firms, as does the ability to achieve intended outcomes. We address this variety through the lens of strategic frames, essential for understanding business environment interpretations that managers develop, interactions with other actors that they engage in, and the subsequent performance firms may achieve. We examine associations between external and internal coopetition factors as perceived by coopeting managers. To single out the coopetition factors seen by respondents as the most relevant and to evaluate their mutual associations, we apply traditional regression analyses on survey data collected from 352 high-technology firms in Poland. To fully embrace the causal complexity, we advance our regression-based insights by using a complementary necessary condition analysis (NCA) and bottleneck analysis. Our results suggest that coopeting managers place higher importance on customer-driven rather than on resource-driven coopetition factors when considered as sufficient leveraging factors. Still, the complementary NCA reveals internal resources as critical factors for the perception of external factors of coopetition. Finally, we identify external technological development as the most limiting bottleneck for the perception of most internal coopetition factors, highlighting coopetition as a technology-driven strategy.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
On singular arcs in nonsmooth optimal control
Autorzy:
Oberle, H. J.
Rosendahl, R.
Tematy:
nonsmooth optimal control problems
necessary conditions
singular state subarcs
Zermelo's problem
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Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:
https://bibliotekanauki.pl/articles/969559.pdf  Link otwiera się w nowym oknie
Opis:
In this paper we consider general optimal control problems (OCP) which are characterized by a nonsmooth ordinary state differential equation. However, we allow only mild types of nonsmoothness. More precisely, we assume that the right-hand side of the state equation is piecewise smooth and that the switching points, which separate these pieces, are determined as points, where a state-and possibly control-dependent (smooth) switching function changes sign. For this kind of optimal control problems necessary optimality conditions are developed. Attention is paid to the situation when the switching function vanishes identically along a nontrivial subarc. Such subarcs, which we call singular state subarcs, are investigated with respect to necessary conditions and to junction conditions. In extension to earlier results of the authors, Oberle and Rosendhal (2006), in this paper nonsmooth OCPs are considered with respect to the order of the switching function. Especially, the case of a zero-order switching function is included and examples of order zero, one and two are treated.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stochastic evolution equations on Hilbert spaces with partially observed relaxed controls and their necessary conditions of optimality
Autorzy:
Ahmed, N.
Tematy:
differential equations
Hilbert spaces
relaxed controls
optimal control
necessary conditions of optimality
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Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Powiązania:
https://bibliotekanauki.pl/articles/729524.pdf  Link otwiera się w nowym oknie
Opis:
In this paper we consider the question of optimal control for a class of stochastic evolution equations on infinite dimensional Hilbert spaces with controls appearing in both the drift and the diffusion operators. We consider relaxed controls (measure valued random processes) and briefly present some results on the question of existence of mild solutions including their regularity followed by a result on existence of partially observed optimal relaxed controls. Then we develop the necessary conditions of optimality for partially observed relaxed controls. This is the main topic of this paper. Further we present an algorithm for computation of optimal policies followed by a brief discussion on regular versus relaxed controls. The paper is concluded by an example of a non-convex problem which is readily solvable by our approach.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Second-order necessary conditions of the Kuhn-Tucker type in multiobjective programming problems
Autorzy:
Aghezzaf, B.
Tematy:
programowanie obiektowe
efficient solutions
multiobjective programming
second-order constraint qualification
second-order necessary conditions
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Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:
https://bibliotekanauki.pl/articles/970055.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, we are concerned with a multiobjective programming problem with inequality constraints. We develop second-order necessary condition of the Kuhn-Tucker type for effciency and prove that the condition holds under a. constraint qualification. Moreover, we give some conditions which ensure that the constraint qua,lifica.tion holds.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On localizing global Pareto solutions in a given convex set
Autorzy:
Drwalewska, Agnieszka
Gajek, Lesław
Tematy:
sufficient and necessary conditions for optimality
Pareto optimal solutions
dual cones
feasible directions
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Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Powiązania:
https://bibliotekanauki.pl/articles/1338686.pdf  Link otwiera się w nowym oknie
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.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recent results on well-posedness and optimal control for a class of generalized fractional Cahn–Hilliard systems
Autorzy:
Colli, Pierluigi
Gilardi, Gianni
Sprekels, Jurgen
Tematy:
fractional operators
Cahn-Hilliard system
optimal control
necessary optimality conditions
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Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:
https://bibliotekanauki.pl/articles/970119.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, we give an overview of results for Cahn–Hilliard systems involving fractional operators that have recently been established by the authors of this note. We address problems concerning existence, uniqueness, and regularity of the solutions to the system equations, and we study optimal control problems for the systems. The well-posedness results are valid for a wide class of fractional operators of spectral type and for the typical double-well nonlinearities appearing in the Cahn–Hilliard system equations, namely the classical differentiable, the logarithmic, and the nondifferentiable double obstacle potentials. While this also applies to the existence of optimal controls in the related optimal control problems, the establishment of first-order necessary optimality conditions requires imposing much stronger assumptions on the admissible class of fractional operators. One main reason for this is the necessity of deriving suitable differentiability properties for the associated control-to-state mapping. Nevertheless, it turns out that also in the singular case of logarithmic potentials, the first-order necessary optimality conditions can be established under suitable assumptions, and a “deep quench” approximation, based on the results derived for logarithmic nonlinearities makes even the case of double obstacle potentials accessible.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Raport Badawczy = Research Report ; RB/3/2013
Simple Proofs of Second order Necessary Conditions for Broken Extremals
Autorzy:
Osmolovskii, Nikolai
Wydawca:
Instytut Badań Systemowych. Polska Akademia Nauk
Systems Research Institute. Polish Academy of Sciences
Powiązania:
Raport Badawczy = Research Report
Opis:
21 pages ; 21 cm
Bibliografia s. 20-21
21 stron ; 21 cm
The paper considers optimal control problems with initial-final state equality and inequality constraints and moxed state-control equality constraints given by smooth functions. The mixed constraints satisfy the regularity assumption of linear independence of gradients with respect to the control. Simple proofs of second-order necessary conditions of Pontryagin minimum for broken extremals in these problems are presented.
Bibliography p. 20-21
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka

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