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    Wyświetlanie 1-11 z 11
    Tytuł:
    Exponential stability of nonlinear neutral type systems
    Autorzy:
    Gil, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/229764.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    neutral type systems
    nonlinear systems
    stability
    Opis:
    Nonlinear neutral type systems with distributed and discrete delays are considered. Explicit exponential stability conditions are established. The main tool is a combined usage of the recent norm estimates for the matrix resolvents, the Urysohn theorem and estimates for fundamental solutions of the linear parts.
    Źródło:
    Archives of Control Sciences; 2012, 22, 2; 125-143
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Input-to-state stability of neutral type systems
    Autorzy:
    Gil', Michael
    Powiązania:
    https://bibliotekanauki.pl/articles/729296.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    neutral type systems
    causal mappings
    input-to-state stability
    Opis:
    We consider the system
    $ẋ(t) - ∫₀^{η} dR̃(τ) ẋ(t-τ) = ∫_0^{η} dR(τ)x(t-τ) + [Fx](t) + u(t)$
    (ẋ(t) ≡ dx(t)/dt), where x(t) is the state, u(t) is the input, R(τ),R̃(τ) are matrix-valued functions, and F is a causal (Volterra) mapping. Such equations enable us to consider various classes of systems from the unified point of view. Explicit input-to-state stability conditions in terms of the L²-norm are derived. Our main tool is the norm estimates for the matrix resolvents, as well as estimates for fundamental solutions of the linear parts of the considered systems, and the Ostrowski inequality for determinants.
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2013, 33, 1; 5-16
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polynomial quasisolutions of linear differential-difference equations
    Autorzy:
    Cherepennikov, V. B.
    Ermolaeva, P. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/255903.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    differential-difference equations
    neutral type
    initial-value problem
    polynomial quasisolution
    Opis:
    The paper discusses a linear differential-difference equation of neutral type with linear coefficients, when at the initial time moment t = 0 the value of the desired function x(t) is known. The authors are not familiar with any results which would state the solvability conditions for the given problem in the class of analytical functions. A polynomial of some degree N is introduced into the investigation. Then the term "polynomial quasisolution" (PQ-solution) is understood in the sense of appearance of the residual Δ(t) = O(tN), when this polynomial is substituted into the initial problem. The paper is devoted to finding PQ-solutions for the initial-value problem under analysis.
    Źródło:
    Opuscula Mathematica; 2006, 26, 3; 431-443
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exact null controllability, complete stabilizability and continuous final observability of neutral type systems
    Autorzy:
    Rabah, R.
    Sklyar, G.
    Barkhayev, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/329801.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    exact null controllability
    complete stabilizability
    final observability
    neutral type system
    Opis:
    For abstract linear systems in Hilbert spaces we revisit the problems of exact controllability and complete stabilizability (stabilizability with an arbitrary decay rate), the latter property being related to exact null controllability. We also consider the case when the feedback is not bounded. We obtain a characterization of complete stabilizability for neutral type systems. Conditions for exact null controllability of neutral type systems are discussed. By duality, we obtain a result about continuous final observability. Illustrative examples are given.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2017, 27, 3; 489-499
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oscillatory properties of solutions of the fourth order difference equations with quasidifferences
    Autorzy:
    Jankowski, R.
    Schmeidel, E.
    Zonenberg, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/255677.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    fourth-order difference equation
    neutral type
    quickly oscillatory solutions
    almost oscillatory
    Opis:
    A class of fourth-order neutral type difference equations with quasidifferences and deviating arguments is considered. Our approach is based on studying the considered equation as a system of a four-dimensional difference system. The sufficient conditions under which the considered equation has no quickly oscillatory solutions are given. Finally, the sufficient conditions under which the equation is almost oscillatory are presented.
    Źródło:
    Opuscula Mathematica; 2014, 34, 4; 789-797
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On The Stability of Neutral-type Uncertain Systems With Multiple Time Delays
    Autorzy:
    Liu, P. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/911133.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    twierdzenie Razumikhina
    opóźnienie czasowe
    układ niepewny
    Razumikhin-type theorem,
    time delay
    neutral type uncertain systems
    Opis:
    The problems of both single and multiple delays for neutral-type uncertain systems are considered. First, for single neutral time delay systems, based on a Razumikhin-type theorem, some delay-dependent stability criteria are derived in terms of the Lyapunov equation for various classes of model transformation and decomposition techniques. Second, robust control for neutral systems with multiple time delays is considered. Finally, we demonstrate numerical examples to illustrate the effectiveness of the proposed approaches. Compared with results existing in the literature, our methods are shown to be superior to them.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2005, 15, 2; 221-229
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On some topological methods in theory of neutral type operator differential inclusions with applications to control systems
    Autorzy:
    Kamenskii, Mikhail
    Obukhovskii, Valeri
    Yao, Jen-Chih
    Powiązania:
    https://bibliotekanauki.pl/articles/729536.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    operator differential inclusion
    neutral type
    periodic solution
    fixed point
    multivalued map
    condensing map
    topological degree
    averaging method
    control system
    distributed control
    Opis:
    We consider a neutral type operator differential inclusion and apply the topological degree theory for condensing multivalued maps to justify the question of existence of its periodic solution. By using the averaging method, we apply the abstract result to an inclusion with a small parameter. As example, we consider a delay control system with the distributed control.
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2013, 33, 2; 193-204
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oscillation criteria for even order neutral difference equations
    Autorzy:
    Selvarangam, S.
    Rupadevi, S. A.
    Thandapani, E.
    Pinelas, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/255009.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    even order
    neutral difference equation oscillation
    asymptotic behavior
    mixed type
    Opis:
    In this paper, we present some new sufficient conditions for oscillation of even order nonlinear neutral difference equation of the form [formula] where m ≥ 2 is an even integer, using arithmetic-geometric mean inequality. Examples are provided to illustrate the main results.
    Źródło:
    Opuscula Mathematica; 2019, 39, 1; 91-108
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corrosion of Retractable Type Fall Arresters
    Autorzy:
    Baszczyński, K.
    Jachowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/90501.pdf
    Data publikacji:
    2009
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    personal protective equipment against falls from a height
    retractable type fall arresters
    corrosion
    neutral salt spray test
    Opis:
    Retractable type fall arresters constitute a most effective group of components used in personal protection systems protecting against falls from a height. They are designed primarily for outdoor use, which results in exposure to atmospheric factors associated with risk of corrosion of metal elements. This paper presents the results of a study, in which retractable type fall arresters were exposed to a simulated corrosive environment, a neutral salt spray. It discusses the development of corrosion processes depending on the duration of exposure to corrosive conditions. Tests demonstrated that corrosion of elements decreased their strength and impaired the functioning of mobile parts. The article presents methods of testing the correct functioning of devices, necessary for assessing their resistance to corrosion, which have been developed for this purpose. It also analyzes the correlation between corrosion-related damage of retractable type fall arresters and potential hazards for their users.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2009, 15, 3; 265-275
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Existence criteria for positive solutions of a nonlinear difference inequality
    Autorzy:
    Cheng, Sui
    Zhang, Guang
    Powiązania:
    https://bibliotekanauki.pl/articles/1208008.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    Sturm type comparison theorem
    limit comparison theorem
    nth order linear difference equation
    eventually positive solution
    eventually positive nonincreasing solution
    neutral difference equation
    nonlinear delay difference inequality
    Opis:
    This paper is concerned with a class of nonlinear difference inequalities which include many different classes of difference inequalities and equations as special cases. By means of a Riccati type transformation, necessary and sufficient conditions for the existence of eventually positive solutions and positive nonincreasing solutions are obtained. Various type of comparison theorems are also derived as applications, which extends many theorems in the literature.
    Źródło:
    Annales Polonici Mathematici; 2000, 73, 3; 197-220
    0066-2216
    Pojawia się w:
    Annales Polonici Mathematici
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the chemical composition of maize cobs depending on the cultivar, effective temperature sum and farm type
    Zmiany składu chemicznego kolb kukurydzy w zależności od odmiany, sumy temperatur efektywnych i typu gospodarstwa
    Autorzy:
    Szyszkowska, A.
    Sowinski, J.
    Wierzbicki, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/46587.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
    Tematy:
    magnesium
    cob
    maize cultivar
    acid detergent fibre
    chemical composition
    farm type
    temperature
    traditional farm
    maize cob
    neutral detergent fibre
    composition change
    effective temperature sum
    organic farm
    phosphorus
    Opis:
    The plant material taken for the study was collected from maize fields in Denmark. In total, maize cobs were collected from 58 fields of 15 farms (9 organic and 6 traditional ones). The plant material (97 samples) was divided according to the following criteria: maize cultivars, effective temperature sum (ETS) during growing period, type of farm (traditional and organic farms). The dry matter content of maize cob samples was determined as well as starch, neutral detergent fiber (NDF) and acid detergent fiber (ADF), phosphorus and magnesium content. The dry matter content was negatively correlated with NDF and ADF, but positively correlated with starch. A highly negative correlation of starch content with NDF and ADF was found.
    Badania przeprowadzono w oparciu o kolby kukurydzy pobrane z pól rolników duńskich w roku 2001. Łącznie pobrano 97 prób, z 58 pól z 15 gospodarstw (9 ekologicznych i 6 tradycyjnych). Uzyskane wyniki przeanalizowano w zależności zróżnicowania odmianowego, sumy temperatur efektywnych oraz typu gospodarstwa. Zawartość suchej masy w kolbach w głównej mierze decydowała o zawartości skrobi, NDF, ADF, a także zawartości fosforu i magnezu. Zawartość suchej masy była ujemnie skorelowana z zawartością NDF i ADF, natomiast dodatnio z zawartością skrobi. Wysoka zawartość NDF i ADF w kolbach kukurydzy była ujemnie skorelowana z udziałem skrobi.
    Źródło:
    Acta Scientiarum Polonorum. Agricultura; 2007, 06, 1
    1644-0625
    Pojawia się w:
    Acta Scientiarum Polonorum. Agricultura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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