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Wyszukujesz frazę "Jakubczyk, B." wg kryterium: Wszystkie pola

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    Tytuł:
    Curvatures of single-input control systems
    Autorzy:
    Jakubczyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/970753.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    control system
    curvature
    invariants
    variational equation
    conjugate point
    Opis:
    We introduce invariants of control-affine systems which we call curvatures. They are defined by the drift and the control distribution, given by the system. The curvatures allow us to analyse the variational equation along a given trajectory, as well as existence of conjugate points.
    Źródło:
    Control and Cybernetics; 2009, 38, 4B; 1375-1391
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Convergence of power series along vector fields and their commutators; a Cartan-Kähler type theorem
    Autorzy:
    Jakubczyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1207968.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    control systems
    Cartan-Kähler theorem
    power series
    convergence
    commutators
    Cauchy estimates
    vector fields
    Opis:
    We study convergence of formal power series along families of formal or analytic vector fields. One of our results says that if a formal power series converges along a family of vector fields, then it also converges along their commutators. Using this theorem and a result of T. Morimoto, we prove analyticity of formal solutions for a class of nonlinear singular PDEs. In the proofs we use results from control theory.
    Źródło:
    Annales Polonici Mathematici; 2000, 74, 1; 117-132
    0066-2216
    Pojawia się w:
    Annales Polonici Mathematici
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase portraits of planar control-affine systems
    Autorzy:
    Jakubczyk, B.
    Respondek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/970556.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    system sterowania
    niezmiennik
    trajektoria krytyczna
    bifurkacja
    control system
    family of control systems
    invariants
    phase portrait
    critical trajectories
    feedback equivalence
    bifurcation
    Opis:
    We study nonlinear control systems in the plane, affine with respect to control. We introduce two sets of feedback equivariants forming a phase portrait PP and a parameterized phase portrait PPP of the system. The phase portrait PP consists of an equilibrium set E, a critical set C (parameterized, for PPP), an optimality index, a canonical foliation and a drift direction. We show that under weak generic assumptions the phase portraits determine, locally, the feedback and orbital feedback equivalence class of a system. The basic role is played by the critical set C and the critical vector field on C. We also study local classification problems for systems and their families.
    Źródło:
    Control and Cybernetics; 2005, 34, 3; 819-847
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Singularities and normal forms of generic 2-distributions on 3-manifolds
    Autorzy:
    Jakubczyk, B.
    Zhitomirskiĭ, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1289586.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    We give a complete classification of germs of generic 2-distributions on 3-manifolds. By a 2-distribution we mean either a module generated by two vector fields (at singular points its dimension decreases) or a Pfaff equation, i.e. a module generated by a differential 1-form (at singular points the dimension of its kernel increases).
    Źródło:
    Studia Mathematica; 1995, 113, 3; 223-248
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Structural Changes in Metallic Glass Fe$\text{}_{18}$Co$\text{}_{60}$Si$\text{}_{9}$B$\text{}_{13}$
    Autorzy:
    Jakubczyk, E.
    Filipecki, J.
    Mandecki, Z.
    Jakubczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933512.pdf
    Data publikacji:
    1995-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Dq
    Opis:
    Structural changes accompanying the isothermal annealing of the metallic glass Fe$\text{}_{18}$Co$\text{}_{60}$Si$\text{}_{9}$B$\text{}_{13}$ were investigated by X-ray diffraction, positron annihilation as well as by electrical resistivity and the Hall resistivity measurements. It has been found out that at the temperature of 673 K the complete crystallization did not occur, but only a few nuclei of the α-Fe phase, which did not grow, were formed.
    Źródło:
    Acta Physica Polonica A; 1995, 88, 1; 163-169
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Phase Transition of Co-Ni-Si-B Amorphous Alloy
    Autorzy:
    Jakubczyk, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027394.pdf
    Data publikacji:
    2001-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.20.Lc
    64.70.Pf
    Opis:
    Structural changes of Co$\text{}_{66}$Ni$\text{}_{12}$ Si$\text{}_{9}$B$\text{}_{13}$ amorphous alloy, stimulated by isochronal and isothermal annealing, were observed by means of the methods: electrical resistivity, Hall effect and X-ray diffraction. In the amorphous matrix at the temperature 673 K phasesα-Co and (Co,Ni)$\text{}_{5}$Si$\text{}_{2}$B are created, while at the temperature 773 K the phase (Co,Ni)$\text{}_{3}$B is formed. The structural phase transitions are related to abrupt decrease in electrical and Hall resistivities at the background of systematic decrease in these parameters values during the alloy transition from the amorphous to the crystalline state.
    Źródło:
    Acta Physica Polonica A; 2001, 99, 6; 673-681
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Effect of Annealing the Fe$\text{}_{78}$Si$\text{}_{9}$B$\text{}_{13}$ Amorphous Alloy Using the EELS Method and the Hall Effect
    Autorzy:
    Kołodziej, H. B.
    Jakubczyk, E.
    Mandecki, Z.
    Całusiński, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929095.pdf
    Data publikacji:
    1993-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Dq
    Opis:
    The effect of structural relaxation on the electronic structure of Fe$\text{}_{78}$Si$\text{}_{9}$B$\text{}_{13}$ metallic glass was investigated by means of the Hall effect, electrical conductivity and EELS methods. The effect of the structural relaxations was observed by four-hour annealing of the samples in argon atmosphere at temperatures 573, 673, 723, 773 K. The most distinct changes in the measured quantities were observed for samples annealed at 773 K. The differences in EELS spectrum, a decrease in the electrical and the Hall resistance are specific to these samples. X-ray diffractometry confirmed that the samples annealed at this temperature show recrystallization.
    Źródło:
    Acta Physica Polonica A; 1993, 83, 3; 327-331
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Size Evolution of the Light Induced Sodium Clusters
    Autorzy:
    Hnat, B.
    Jakubczyk, D.
    Kolwas, K.
    Kolwas, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1920745.pdf
    Data publikacji:
    1992-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    36.40.+d
    31.70.Hq
    64.70.-p
    Opis:
    We report the observation of the size evolution of the laser light formed clusters. A cell containing sodium vapor and the buffer gas (He) under high pressure was used in the experiment. Changes of the radius and of the density of transient clusters were observed via the time evolution of the intensity of right-angle scattered light. The rate of the cluster radius growth was found to vary from 0.012 to 0.1 μm/s.
    Źródło:
    Acta Physica Polonica A; 1992, 81, 6; 629-637
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the Annealed Metallic Glass Fe$\text{}_{28}$Co$\text{}_{50}$Si$\text{}_{9}$B$\text{}_{13}$ by the X-Ray and Electrical Resistance Methods
    Autorzy:
    Jakubczyk, E.
    Mandecki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1861253.pdf
    Data publikacji:
    1994-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Dq
    Opis:
    In this paper results of investigations of the X-ray diffraction and the electrical resistance of the metallic glass Fe$\text{}_{2}$8Co$\text{}_{50}$Si$\text{}_{9}$B$\text{}_{13}$ are presented. These investigations were performed for isothermally annealed samples during 4 hours in the temperature range from 573 to 823 K. As a result of annealing, the samples were obtained in a crystalline state. The second series of the investigations was performed for samples annealed at a constant temperature of 673 K but in different time intervals.
    Źródło:
    Acta Physica Polonica A; 1994, 85, 1; 215-218
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Expert systems in assessing the construction process safety taking account of the risk of disturbances
    Autorzy:
    Siemaszko, A.
    Jakubczyk-Galczynska, A.
    Grzyl, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/30147063.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
    Tematy:
    construction safety
    artificial intelligence
    expert system
    Opis:
    The objective of the paper is to present the issue of safety management during the construction process. Threats in the form of disturbances may occur in the preparatory phase, during the execution of the construction project and also during its operational use. The article presents the concept of applying the methodology based, among others, on Learning Bayesian Networks, Artificial Neural Networks and Support Vector Machine, which can be used for building a system for diagnostic and decision-making support at each stage of the construction process. The use of expert systems when it comes to making choices related to construction issues can bring many benefits to decision-makers, as it reduces the risk of taking a wrong decision, and, thus, increases the construction process safety.
    Źródło:
    Scientific Journal of the Military University of Land Forces; 2018, 50, 3(189); 218-227
    2544-7122
    2545-0719
    Pojawia się w:
    Scientific Journal of the Military University of Land Forces
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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