Autor: El Jai, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Regional observation and sensors
Autorzy:: El Jai, A.
Hamzaoui, H.
Powiązania:: https://bibliotekanauki.pl/articles/907859.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: układ o parametrach rozłożonych
czujnik pomiarowy
obserwowalność
błąd obserwacji
distributed parameter system
sensor
observability
observation error
Opis:: The purpose of this short paper is to provide original results related to the choice of the number of sensors and their supports for general distributed parameter systems. We introduce the notion of extended sensors and we show that the observation error decreases when the support of a sensor is widened. We also show that the observation error decreases when the number of sensors increases.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2009, 19, 1; 5-14
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Spatial Compensation of Boundary Disturbances by Boundary Actuators
Autorzy:: Afifi, L.
Chafiai, A.
El Jai, A.
Powiązania:: https://bibliotekanauki.pl/articles/908071.pdf
Data publikacji:: 2001
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: system z rozproszonymi parametrami
nastawnik
sterowanie
distributed-parameter systems
remediability
controllability
actuators
sensors
Opis:: In this paper we show how to find convenient boundary actuators, termed boundary efficient actuators, ensuring finite-time space compensation of any boundary disturbance. This is the so-called remediability problem. Then we study the relationship between this remediability notion and controllability by boundary actuators, and hence the relationship between boundary strategic and boundary efficient actuators. We also determine the set of boundary remediable disturbances, and for a boundary disturbance, we give the optimal control ensuring its compensation.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2001, 11, 4; 899-920
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Admissible Disturbance Sets for Discrete Perturbed Systems
Autorzy:: Bouyaghroumni, J.
El Jai, A.
Rachik, M.
Powiązania:: https://bibliotekanauki.pl/articles/908336.pdf
Data publikacji:: 2001
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: system dyskretny
wskaźnik dopuszczalności
discrete systems
bilinear disturbance
admissibility index
Opis:: We consider a discrete disturbed system given by the difference bilinear equation x^{w}_{i+1} =Ax^{w}_{i} + De_{i} + sum_{j=1}^{q}f^{j}_{i}B_{j}x^{w}_{i}, i geq 0, where w=((e_{i})_{i geq 0}, (f_{i})_{i geq 0}) are disturbances which excite the system in a linear and a bilinear form. We assume that the system is augmented with the output function y^{w}_{i}=Cx^{w}_{i}, i geq 0. Let varepsilon be a tolerance index on the output. The disturbance w is said to be varepsilon-admissible if ||y^{w}_{i}-y_{i}|| leq varepsilon, forall i geq 0, where (y_{i})_{i geq 0} is the output signal associated with the case of an uninfected system. The set of all varepsilon-admissible disturbances is the admissible set {cal W}(varepsilon). The characterization of {cal W}(varepsilon) is investigated and numerical simulations are given.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2001, 11, 2; 349-367
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Regional Detection and Reconstruction of Unknown Internal or Boundary Sources
Autorzy:: Afifi, L.
El Jai, A.
Merry, M.
Powiązania:: https://bibliotekanauki.pl/articles/908333.pdf
Data publikacji:: 2001
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: plik źródłowy
czujnik pomiarowy
sources
detection
observation
region
sensors
Opis:: The purpose of this paper is to study the problem of regional detection, to characterize internal or boundary regionally detectable sources and regionally spy sensors, and to establish a relationship between these sensors and regionally strategic sensors. It is shown how to reconstruct a regionally detectable internal or a boundary source from a given output, with an extension to the case when the output is affected by an observation error. Numerical results are given in the case of a diffusion system.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2001, 11, 2; 319-347
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: How to compensate a spreading disturbance for a class of nonlinear systems
Autorzy:: Quaraai, Y.
Bernoussi, A. S.
El Jai, A.
Powiązania:: https://bibliotekanauki.pl/articles/907943.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: zaburzenia
sterowanie
system nieliniowy
system rozproszony
distributed nonlinear systems
disturbance
spreadability
remediability
control
Opis:: We consider a system which is assumed to be affected by an expanding disturbance which occurs at the initial time. The compensation of the disturbance is accomplished by extending the concept of remediability to a class of nonlinear systems. The results are implemented and illustrated with a nonlinear distributed model.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2008, 18, 2; 171-187
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Weak and exact domination in distributed systems
Autorzy:: Afifi, L.
Magri, E. M.
El Jai, A.
Powiązania:: https://bibliotekanauki.pl/articles/907699.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: system rozproszony
dominacja
aktuator
czujnik
distributed system
domination
actuators
sensors
Opis:: In this work, we introduce and examine the notion of domination for a class of linear distributed systems. This consists in studying the possibility to make a comparison between input or output operators. We give the main algebraic properties of such relations, as well as characterizations of exact and weak domination. We also study the case of actuators, and various situations are examined. Applications and illustrative examples are also given. By duality, we extend this study to observed systems. We obtain similar results and properties, and the case of sensors is equally examined.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2010, 20, 3; 419-426
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

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