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Wyszukujesz frazę "Benali, A." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Modelling and control of an omnidirectional mobile manipulator
Autorzy:
Djebrani, S.
Benali, A.
Abdessemed, F.
Powiązania:
https://bibliotekanauki.pl/articles/330102.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
manipulator mobilny
sterowanie impedancyjne
logika rozmyta
holonome mobile manipulators
input state linearization
virtual impedance control
fuzzy logic
Opis:
A new approach to control an omnidirectional mobile manipulator is developed. The robot is considered to be an individual agent aimed at performing robotic tasks described in terms of a displacement and a force interaction with the environment. A reactive architecture and impedance control are used to ensure reliable task execution in response to environment stimuli. The mechanical structure of our holonomic mobile manipulator is built of two joint manipulators mounted on a holonomic vehicle. The vehicle is equipped with three driven axles with two spherical orthogonal wheels. Taking into account the dynamical interaction between the base and the manipulator, one can define the dynamics of the mobile manipulator and design a nonlinear controller using the input-state linearization method. The control structure of the robot is built in order to demonstrate the main capabilities regarding navigation and obstacle avoidance. Several simulations were conducted to prove the effectiveness of this approach.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 3; 601-616
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomonitoring of environmental pollution on the Algerian West coast using caged mussels Mytilus galloprovincialis
Autorzy:
Taleb, Z.M.
Benali, I.
Gherras, H.
Ykhlef-Allal, A.
Bachir-Bouiadjra, B.
Amiard, J.-C.
Boutiba, Z.
Powiązania:
https://bibliotekanauki.pl/articles/49006.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
mussel
caged mussel
lysosomal membrane stability
biomonitoring
Mytilus galloprovincialis
micronucleus
Algerian West coast
acetylcholinesterase
environment pollution
Opis:
An active biomonitoring study was carried out on the Algerian west coast using wild reference mussels (Mytilus galloprovincialis) sampled from the Kristel (K) site and transplanted in net cages during one month (between May and June 2007) to Oran Harbour (OH) and Mostaganem Harbour (MH), areas characterised by high levels of urban and industrial pollution. The biological response of the mussels was evaluated by their condition index and the use of a general stress biomarker (evaluation of lysosomal membrane stability: the neutral red retention time (NRRT) method), a genotoxic effects biomarker (determination of micronuclei (MN) frequency) and a neurotoxic effects biomarker (determination of the acetylcholinesterase (AChE) concentration). Compared to the K reference specimens, OH and MH caged mussels presented a significant decrease of NRRT in lysosomal haemocytes (56.45±26.48 min and 67.25±22.77 min, respectively) (78±16.97 min for K mussels), an MN frequency respectively 7.3 and 9 times higher in the haemocytes and the gill cells of the OH caged mussels, and 7.2 and 6.4 times higher in the two tissues of the MH caged mussels. Significant inhibition of AChE activity was noted in the gills (16.93±3.1 nmol min−1 mg prot−1) and the digestive gland (7.69±1.79 nmol min−1 mg prot−1) of the OH mussels, but only in the gills (23.21±5.94 nmol min−1 mg prot−1) of the MH mussels, compared to the organs of the K control specimens (35.9±6.4 nmol min−1 mg prot−1 in the gills and 11.17±0.49 nmol min−1 mg prot−1 in the digestive gland). This study reflects the interest in such in situ biomonitoring assays and the utility of these biomarkers for assessing the effects of pollution in the Algerian coastal marine environment.
Źródło:
Oceanologia; 2009, 51, 1; 63-84
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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