15 articles in this issue
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M BENSALAH,M ADACI,H HEBIB,M BESSEDIK,L BELKEBIR,M MAHBOUBI,M.E.H MANSOURI,C MAMMERI,B MANSOUR
In the northern part of El Bayadh, localised about 3 km from this town, many prints of dinosaurians steeps are present in the lower age of cretaceous (Valanginien). The prints were highlighted spread out over 1 km2 on the lumachellic clay-limestone p... see more
A BENALI
Usually to determine a measure of the degree of ill-conditioning of an algebraic system, we invoke a condition number for the coefficients matrix. In groundwater modeling these coefficients are depending on the parameters of the heteregeneous porous mediu... see more
A BEROUAL,H HOUARI
This paper presents a nondestructive method enabling to characterize heterostructures or composite materials based on the equivalent electrical impedance. The heterostructures consist of a host dielectric material (a three-dimensional homogeneous matrix) ... see more
S ZERMANE,S BOUDEBOUS,N BOULKROUNE
In this work, we present a numeric study of the phenomenon of laminar mixed convection in a ventilated square cavity, of which one of partitions is submitted to a constant temperature, while the other partitions are considered like adiabatic. Equations go... see more
G PLUVINAGE,V.T SAPUNOV
For different types of materials including composites, an approximate solution of table bending reduction factor slenderness is proposed. The lost of stability is considered as a failure of the criterion. The probability of failure is thencomputed for pla... see more
A BOUTARFA,N BOUGUECHAL,Y ABDESSEMED
In this paper we propose a neuro-mimetic technique relating to the detection of beacons in mobile robotics. The objective is to bring a robot moving in an unspecified environment to acquire attributes for recognition. We develop a practical approach for t... see more
S.M DEBBAL,F BEREKSI-REGUIG
Cet article présente les applications des versions continue etdiscrète de la transformée d’ondelettes dans l’analyse des signaux des bruits cardiaques (ou phonocardiogramme : PCG) normaux et pathologiques. La transformée d’ondelettes fournit un large éven... see more
M.L SEKIRIFA,M HADJ-MAHAMMED
With the rise and the development ofthe industrial sector, the problem of pollution remains the subject of interest of many scientists, since it touches several vital sectors. In this work, we are interested in the water resources polluted by the chemical... see more
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A BEGHIDJA,J.J VULLIERME
Our study concerns the modelling of the thermal exchanges by convection in an enclosure. We describe the experimental method used based on fluxes and heat exchange phenomena. The effect of the walls temperature on the thermal equilibrium of the cavity is ... see more
H SFAR FELFOUL,P CLASTRES,M BENOUEZDOU
This study concerns the environmental management of the hosphogypsum piles of Sfax (Tunisia). We propose the use of this phosphogypsum in road construction. After characterization of the materials, and study of his variability during storage, we have dete... see more
A ZERROUT
The present survey consists of numerical prevision of two turbulent jets with swirling in a combustion chamber. The simulation is based on numerical method of finite volumes and finite differences of Patankar. The mathematicalmodel used is two equations o... see more
Y LAHIOUEL,A.K HADDAD,K CHAOUI
Energy losses in pipes used for the transportation of fluids (water, petroleum, gas,etc.) are essentially due to friction, as well as to the diverse singularities encountered. These losses are usually converted into head reductions in the direction of the... see more
A SOUKKOU,A KHELLAF,S LEULMI
This article presents the application of a new generation of fuzzy logic supervisor (FLS) to the highly nonlinear systems. The dominant parameters characterizing the base of fuzzy knowledge: scaling factors of the Input/Output (I/O) variables,membership f... see more