Autor: Clarke, F. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: High Pulsed Magnetic Field Sensor Based on La-Ca-Mn-O Thin Polycrystalline Films
Autorzy:: Balevičius, S.
Žurauskienė, N.
Stankevič, V.
Keršulis, S.
Novickij, J.
Altgilbers, L. L.
Clarke, F.
Powiązania:: https://bibliotekanauki.pl/articles/2041727.pdf
Data publikacji:: 2005-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.Kz
73.40.Gk
85.70.Ay
61.72.Mm
Opis:: It is demonstrated that polycrystalline La$\text{}_{0.33}$Ca$\text{}_{0.67}$MnO$\text{}_{3}$ thin film sensors can be used to measure pulsed strong magnetic fields with microsecond duration rise and decay times. The response characteristics of these sensors were investigated using 0.7-1.0 ms duration bell-shaped magnetic field pulses of 10-20 T amplitudes and by using special waveform magnetic field pulses with amplitudes of 40 T and decay times of 50μs. The response of these magnetic field sensors was compared with those of conventional loop sensors and Faraday rotation sensors using Bi$\text{}_{12}$SiO$\text{}_{20}$ single crystals as a known standard.
Źródło:: Acta Physica Polonica A; 2005, 107, 1; 207-210
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: The maximum principle in optimal control, then and now
Autorzy:: Clarke, F.
Powiązania:: https://bibliotekanauki.pl/articles/970551.pdf
Data publikacji:: 2005
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: sterowanie optymalne
warunek konieczny
zasada maksimum
analiza niegładka
optimal control
necessary conditions
maximum principle
nonsmooth analysis
Opis:: We discuss the evolution of the Pontryagin maximum principle, focusing primarily on the hypotheses required for its validity. We proceed to describe briefly a unifying result giving rise to both classical and new versions, a recent theorem of the author giving necessary conditions for optimal control problems formulated in terms of differential inclusions. We conclude with a new application of this result for the case in which mixed constraints on the state and control are imposed in terms of equalities, inequalities, and unilateral set constraints. In order to lighten the exposition, the discussion is limited to differentiable data, thereby avoiding mention of generalized gradients or normal cones, except, in the technical section on differential inclusions.
Źródło:: Control and Cybernetics; 2005, 34, 3; 709-722
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Effect of spent engine oil on soil catalase and dehydrogenase activities
Autorzy:: Achuba, F.I.
Peretiemo-Clarke, B.O.
Powiązania:: https://bibliotekanauki.pl/articles/25938.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:: International Agrophysics; 2008, 22, 1; 1-4
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Stability analysis of sliding-mode feedback control
Autorzy:: Clarke, F. H.
Vinter, R. B.
Powiązania:: https://bibliotekanauki.pl/articles/970887.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: sliding-mode control
discontinuous control
Lyapunov functions
stabilization
robustness
Opis:: This paper provides new analytic tools leading to the first rigorous stability and robustness analysis of sliding-mode feedback controllers. Unrestrictive conditions are given, under which these controllers are stabilizing in the presence of large disturbances, conditions invoke the existence of two Lyapunov-type functions, the first associated with passage to the sliding set in finite time, and the second with convergence to the desired state. In this approach, account is taken, from the outset, of implementational constraints. We provide a framework for establishing stability and robustness of the closed-loop system, for a variety of implementation schemes. We illustrate our results by means of two examples of the type frequently encountered in the sliding-mode literature.
Źródło:: Control and Cybernetics; 2009, 38, 4A; 1169-1192
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: The nonsmooth maximum principle
Autorzy:: Clarke, F. H.
Pinho, M. R. de
Powiązania:: https://bibliotekanauki.pl/articles/970885.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: optimal control
Pontryagin maximum principle
nonsmooth analysis
Opis:: We present a brief survey of the nonsmooth maximum principle of optimal control, focusing, in particular, upon the alternative forms of the adjoint equation. We obtain a new version of the theorem that asserts for the first time the full Weierstrass condition together with the Euler form of the adjoint equation, thereby extending a result of de Pinho and Vinter. The new theorem also features stratified hypotheses and conclusions. Two examples illustrate its use.
Źródło:: Control and Cybernetics; 2009, 38, 4A; 1151-1167
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

Artykuł

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