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Conway et al. mentioned that the in-situ gelled acid was very viscous, especially in the pH range of 2-4[6].
[2] Al-Mutawa.Polymer-Free Self-Divertion Acid Stimulation Kuwait Well.24:195–206.(2002)
[4] Chang, F.F., Nasr-El-Din, H.A., Lindvig, T., and Qiu, X.W.
[5] Chang, F.F., Qiu, X., and Nasr-El-Din, H.A.
[18] Jenkins R D, Basset D R, Silebi C A, El-Aasser M.

Chemical compositions of steel (mass%) C Si Mn P S Al N 0.12 1.37 1.47 0.006 0.006 0.043 0.0056 The annealing simulations were conducted in the laboratory with the Annealing Simulator (CCTAW-Y) on cold rolled sheet.
) 120s 200s 260s 16 18 20 22 24 26 28 EL(%) 0.20 0.21 0.22 0.23 0.24 0.25 0.26 n Figure 2 Effect of austempering temperature on the mechanical properties (a) TOA=400℃ (b) tOA=260s Figure 3 Effects of TOA and tOA on the n value The optical microstructures of annealed sheets are shown in figure 4, the gray represents ferrite, the black and white along grain boundary represent bainite and retained austenite respectively.
Table 3 shows the mechanical properties of the sheets produced, in which the high TS×EL value make it possible to draw complicated parts.
Table 3 Mechanical properties of TRIP600 (1mm thickness) Direction YS(MPa) TS(MPa) ELU(%) EL(%) TS×EL n r 0 462 646 26.5 38.5 24871 0.24 1.02 45 475 663 25.1 36.4 24133 0.23 0.85 90 475 658 24.8 37.2 24478 0.23 1.40 Figure 6 shows the microstructure of TRIP 600, consisting of ferrite (gray), bainite (black) and retained austenite (white).
(a) Optical (b) SEM (c) TEM Figure 6 Microstructure of TRIP600 observed by optical, SEM and TEM Summary The effect of austempering temperature and time on mechanical properties of TRIP steel was studied and the following results were obtained. 1) Austempering temperature markedly influences on the transformation kinetics of Si-Mn TRIP steel. 300℃ or 500℃ austempering will accelerate the transformation, but deteriorate the formability and the optimum austempering temperature to produce TRIP steel is 400℃. 2) The mill trial based on the laboratory investigation was performed successfully using the industrial line, and the annealed sheet possesses high n value and high TS×EL, making it possible to draw complicated parts.

Zhuang et al. fabricated flat sheet membranes from diverse types of waste PS for the gas separation [3].
Garcia et al. studied the application of HIPS-R flat sheet membranes in low-pressure membrane processes [2].
Ke et al., “Electrospun polystyrene nanofibrous membranes for direct contact membrane distillation,” J.
El-Shazly, M.F.
El-Shazly, M.

Constitutive equations for Finite Element simulation Carlo Bruni , Mohamad El Mehtedi DIISM, Università Politecnica delle Marche, Ancona, Italia c.bruni@univpm.it, elmehtedi@univpm.it Keywords: Mg alloy ZEK 200, constitutive equations, modeling, extrusion processes Abstract.
The obtained results, in terms of the possibility to split the temperature interval into two temperature ranges is in agreement, from the modelling point of view, with that found on the same material by Spigarelli at al.[4] with the Sellars and Tegart based models.
El Mehtedi, M.
El Mehtedi, P.
Shao, The characteristics of plastic flow and a physically-based model for 3003 Al-Mn alloy upon a wide range of strain rates and temperatures, European Journal of Mechanics A/Solids 30 (2011) 54-62

SAHKE2000 is an upgrade version of SHAKE72, which was compiled by Lysmer.J et al in 1972[4].
LSSRLI-1 was compiled by Xiaojun Li et al in 1980s[4,5].
El Centro wave is in common use in the field of seismic engineering, and it has broad acceleration response spectrum.
El Centro wave is downloaded from PEER database, AKTH19 and KSRH waves are downloaded from Kik-Net database.
[6] Xue Yan et al, Characteristics of seismic activity before 27 February 2010 Chile Mw8.8 earthquake [J], Acta Seismologic Sinica, 2011,33(3):292-303.

TS×EL balance of hot-rolled sheet.
Table 1 shows values of TS×EL.
The value of TS×EL raised with decrease in holding temperature since TS significantly increased against the decrease in elongation.
Funakawa et. al.: ISIJ Inter. 44(2004), 1945
[6] K.Takeda et. al.: ISIJ Inter. 48(2008), 1122

Oon, et al.
Li, et al.
Liu, et al.
Wei, et al.
Lü, et al.

The raw wastewater was taken from the main collector of El Oued city at the entrance to the aerated lagoon plant of Kouinine.
All experiments were carried out in 2016 at El-Oued University in South-east of Algeria.
Hadad et al. [16] observed that 21% of TP removed in pilot-scale constructed wetland was present in the vegetation biomass.
Moreover, phosphorus can co-precipitate with electro-active elements such as calcium (Ca), aluminum (Al) and iron (Fe) [11, 16].
(NMO), “Average Daily of Preci- pitation and Temperature 1989-2015,” El Oued, Algeria, 2016

El Afifi et al. [31] and Awwad et al. [20] added that the sequential chemical treatment for radium is highly recommended through two bases of approaches that utilize chemical solutions in four successive steps.
Al-Masri and H.
El-Afifi, H.
El Fels, S.
El Afifi, N.

El Ganaoui1, H.
These results match well with the previous ones of Robert et al [5].
El Ganaoui and P.
Fauchais, Numerical analysis of plasma surface interaction, Proceeding of XV International Conference on Gas Discharges and their Applications GD2004, Toulouse, September 2004, P. 997-1001 [7] Pateyron B., Vardelle A., El Ganaoui M., 2001, G.
[10] El Ganaoui M., Lamazoude A.