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    Tytuł:
    Finite-dimensional representations of the value functions of some optimal control problems
    Autorzy:
    Mirica, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/206207.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    funkcja brzegowa
    funkcja wartości
    regularność
    sterowanie optymalne
    twierdzenie weryfikacji
    generalized characteristic flow
    generalized Hamiltonian flow
    marginal function
    optimal control
    regularity
    value function
    verification theorem
    Opis:
    In this survey we analyze the possibility of obtaining information on regularity and irregularity properties of the value functions of some optimal control problems from their more precise description as marginal functions of finite-dimensional type, in terms of certain "generalized characteristic flows" which, in turn, may be constructed using either necessary optimality conditions (PMP-Pontryagin's Minimum Principle), whenever applicable, or suitable extensions of Cauchy's Method of Characteristics for the associated Hamilton-Jacobi-Bellman equation. This type of representation, which may be justified either by the application of PMP "combined" with existence theorems or by the application of a suitable verification theorem of Dynamic Programming type, not only facilitates numerical computation of the value function but also may allow identification of its discontinuity points, non-differentiability points, propagation of singularities, etc. ; this approach is illustrated with three significant examples from classical Calculus of Variations.
    Źródło:
    Control and Cybernetics; 2002, 31, 3; 779-801
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On robustness of set-valued maps and marginal value functions
    Autorzy:
    Hoffmann, Armin
    Geletu, Abebe
    Powiązania:
    https://bibliotekanauki.pl/articles/729640.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    robust set; robust function; robust set-valued map; marginal value function; piecewise lower (upper) semi-continuous; approximatable function; approximatable set-valued map; regularity condition; extended Mangasarian-Fromovitz constraint qualification
    Opis:
    The ideas of robust sets, robust functions and robustness of general set-valued maps were introduced by Chew and Zheng [7,26], and further developed by Shi, Zheng, Zhuang [18,19,20], Phú, Hoffmann and Hichert [8,9,10,17] to weaken up the semi-continuity requirements of certain global optimization algorithms. The robust analysis, along with the measure theory, has well served as the basis for the integral global optimization method (IGOM) (Chew and Zheng [7]). Hence, we have attempted to extend the robust analysis of Zheng et al. to that of robustness of set-valued maps with given structures and marginal value functions. We are also strongly convinced that the results of our investigation could open a way to apply the IGOM for the numerical treatment of some class of parametric optimization problems, when global optima are required.
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2005, 25, 1; 59-108
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Semantic Shifts and Stylistic Overtones as Conveyed by Function Verb Phrases. Comparative View: English, German, Rom
    Autorzy:
    MÁCIUCÁ, GINA
    Powiązania:
    https://bibliotekanauki.pl/articles/953875.pdf
    Data publikacji:
    2008-12-31
    Wydawca:
    Uniwersytet Opolski
    Tematy:
    function verb phrase
    marginal verb
    Aktionsart
    ingressive
    egressive
    stylistic synonymy
    implicit/explicit passive/reflexive
    time/space-saving function
    minor performer
    decomposition of idiomatic meaning
    linguicomedy
    translatability
    Opis:
    After painstakingly anatomizing in a previous book (s. DIP) the function verb phrase (FVP) in German and tracking down English combinations which display the morpho syntactical pattern, comply with the lexicosemantic criteria and assume the stylistic features, characteristic of “Funktionsverbgeflige” (FVGs), I resume in the present contribution my relentless quest for lexicomorphological conveyors of FVGs, this time in Romaniana Romance language - and then, in a second stage, try to go with a fine tooth-comb through the semantic and stylistic shifts following in the wake of FVPs as employed by the three languages at issue (German, English and Romanian). The opening section of the paper at hand searches in a first phase through the samples of Romanian FVPs extracted from various sources and assigns them to the aspect subcategories which they most fittingly illustrate: ingressive, punctual, iterative and egressive. In a second phase the analysis focuses on type a-§i ie$i din rábdári FVPs which convey a transition from one state to another and, consequently, admit of a double-barrelled interpretation, i.e. both egressive and ingressive - hence the labels ‘contradiction in terms’ and ‘transitive aspect’ I put forward as indicative of their idiosyncratic behaviour. The third and final phase of my survey is devoted to investigating stylistic synonymy as well as defending such intriguing FVPs as fa ll in love and fa ll out o f love. The approach in the middle section is roughly the same, i.e. descriptive in the beginning, with copious illustration of various semantic shifts (active / reflexive > passive, active > reflexive) as well as of the contrasts and similarities observed when comparing the three languages at issue, and interpretive in the second stage, with the focus on two most challenging cases: the ‘implicit’ passive with a subject acting semantically as a ‘minor performer’; the surprisingly divergent semantics of two at first blush similar FVPs {be thrown into ecstasies and go into ecstasies). The third section investigates the involuntary as well as premeditated decomposition of idiomatic meaning in FVPs, which more often than not is to be held accountable for comic effects. The technique at work here is the superimposition of nonidiomatic meaning on the idiomatic one, which in turn triggers off the reaction phase of the listener/reader confronted when least expected with the real intentions of the speaker/writer. The effects of the interference at issue range from ambiguity through a smack of ridicule - when decomposition is unintentional - to the most sophisticated linguistic humour - when decomposition is premeditated. Since the approach is also a contrastive one, the final conclusions would only naturally relate to the rendering into another language of linguicomedy samples. Unfortunately the translatability of interference-effects-generated linguistic humour has been found to be minimum at best in most cases.
    Źródło:
    Stylistyka; 2008, 17; 313-326
    1230-2287
    2545-1669
    Pojawia się w:
    Stylistyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interwencjonizm a wolny rynek w rolnictwie krajów Europy Środkowo-Wschodniej przed i po przystąpieniu do Unii Europejskiej
    Interventionism and free market in agriculture of Central and Eastern European states before and after accession to EU
    Autorzy:
    Błażejczyk-Majka, Lucyna
    Powiązania:
    https://bibliotekanauki.pl/articles/955732.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
    Tematy:
    perfect competition
    CES production function
    Hicksian hypothesis
    relative prices of production factors
    marginal rate of substitution
    konkurencja doskonała
    funkcja ces
    hipoteza hicksa
    relatywne ceny czynników produkcji
    krańcowa stopa substytucji
    Opis:
    W pracy przedstawiono jedną z metod oceny stopnia interwencjonizmu w obszarze rolnictwa. Badanie przeprowadzono dla rolnictwa: Czech, Słowacji, Litwy, Łotwy, Estonii, Polski i Węgier w latach 1997-2013. Punktem wyjścia przeprowadzonych badań była estymacja dwuczynnikowej funkcji CES, a następnie sprawdzenie wiarygodności spełnienia założeń tej estymacji. W wyniku przeprowadzonych badań dowiedziono, że interwencjonizm w rolnictwie prowadzi w większym stopniu do zaburzeń na rynku kapitału trwałego niż siły roboczej.
    The paper presents one of the methods of assessing the degree of intervention in agriculture. The study was conducted for the agricultural sectors of the Czech Republic, Slovakia, Lithuania, Latvia, Estonia, Poland, and Hungary in the period 1997-2013. The starting point of the study was to estimate the two-factor CES production function. Then the validity of the assumptions of the estimation was verified. The analysis shows that interventionism in agriculture affects the market of fixed capital to a greater extent than the labour market.
    Źródło:
    Optimum. Economic Studies; 2015, 1(73); 110-123
    1506-7637
    Pojawia się w:
    Optimum. Economic Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rational taxation in an open access fishery model
    Autorzy:
    Rokhlin, D. B.
    Usov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/229509.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    marginal value function
    stimulating taxes
    myopic agents
    optimal control
    Opis:
    We consider a model of fishery management, where n agents exploit a single population with strictly concave continuously differentiable growth function of Verhulst type. If the agent actions are coordinated and directed towards the maximization of the discounted cooperative revenue, then the biomass stabilizes at the level, defined by the well known “golden rule”. We show that for independent myopic harvesting agents such optimal (or ε-optimal) cooperative behavior can be stimulated by the proportional tax, depending on the resource stock, and equal to the marginal value function of the cooperative problem. To implement this taxation scheme we prove that the mentioned value function is strictly concave and continuously differentiable, although the instantaneous individual revenues may be neither concave nor differentiable.
    Źródło:
    Archives of Control Sciences; 2017, 27, 1; 5-27
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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