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Wenwen et al. [7] investigated the microstructural features and mechanical properties of AZ91 (Mg-9%Al-1%Zn-0.2%Mn) based alloys containing Ca and rare earth (RE) metals, and reported that small amount of Ca does not produce any new phase but mainly dissolves into β (Mg17Al12) phase, which leads to the enhanced thermal stability of the β phase.
Lee et al. [8] reported that solute elements such as Zr, Ca and Si possess higher growth restriction factors on Mg due to their strong segregating power.
The absence of Mg2Ca phase, which is generally found in Mg-Ca or Mg-Al-Ca alloys [11], is noteworthy.
Fig. 7 shows the changes in yield strength (YS), ultimate tensile strength (UTS) and elongation (El.)
From the previous report by Wenwen et al. [7] that the addition of Ca into Mg-Al alloys results in higher thermal stability of the β (Mg17Al12) phase, Ca might also play a important role in enhancing thermal stability of the Mg12RE phase.

Natio et al. mainly employed 2-D FEM and 3-D FEM-BEM to conduct numerical simulations of the above-mentioned field tests [2].
The Dynamic Responses After establishing 3-D models of the buildings with ANSYS, the El Centro wave was taken as the x-direction excitation to study the dynamic responses.
Iguchi, et al: 12th World Conference on Earthquake Engineering, Auckland, New Zealand, (2000), Paper No. 477/6/A [2] Y.
Hofmayer, et al: ASME/JSME Pressure Vessels and Piping Conference, San Diego, California, USA, (2004), p. 1-11 [4] P.Y.
Guéguen, et al: Geotech.

[4] Al.
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[7] Al.
[8] Al.
El Haddad, T.H.

Selection and Processing of the Specimen Material The material used in the present study is AZ91 with following chemical composition Mg-9%Al-1%Zn (in wt. %).
K, Multi-dome test for determining the strain rate sensitivity index of a superplastic 7075 Al alloy sheet, The International Journal of Alloys and Compounds. 583 (2014) 226-230
[6] El-morsy A.
,Ken-ichi manabe, and Hisashi Nishimura, Superplastic characteristics of Ti-alloy and Al- alloy sheets by multi-dome forming test, materials transactions. 42 (2001) 2332-2338
[8] Abdel-Wahab, El Morsy, Ken-ichi Manabe and Hisashi Nishimura, superplastic forming of AZ31 Magnesium alloy sheet into a rectangular pan, materials transactions. 43 (2002) 2443 – 2448.

EL Glaeser, Kahn ME et al have studied the correlation of regional development, climate change and carbon emission[5-7]; Mingkui, c and F.I.
Action plan for climate and energy 2010-2010 ,2010 [4] Fan y, Liu L C, et al. 2007.
[5] EL Glaeser, Kahn ME.
Journal of Urban Economics, Vol.67(2010), p.404 [6] Christopher Kennedy, Steinberger Julia, Gasson Barrie, et al.
Energy Policy,Vol.9(2010),p.4828 [7] Zhao B,Kreeuter U, Li B et al.

References [1] El-Rafie M H, Mohamed A, Shaheen I, et al.
[2] Yang Fuchu, et al.
[3] Wazed Ali S, Rajendran S, et al.
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El-Sayed et al. [26], Khalid et al. [65], and Vignesh et al. [63] .
El Hdiy, H.
El-Sayed, W.M.
El-Bassyouni, S.M.
Al-Shehri, S.

Al-10Sr is most effective to refine microstructure and improve mechanical properties of AS31 alloy.
The 0.2% yield strength (YS), ultimate tensile strength (UTS) and elongation to rupture (El.) were averaged over three specimens.
And 1 wt.% Al-10Sr is most effective to modify the Mg2Si phase.
And 1wt.% Al-10Sr improves the ultimate strength, yield strength and elongation to 126.1MPa, 96.1MPa and 7.5%.
And 1 wt.% Al-10Sr is most effective to refine grains and modify the Mg2Si phase.

It may be due to the hopping of charge carriers from one site to another as the temperature increases and may be attributed to the decrease in resistivity [10], in agreement with the reported results of Ravinder et al [11].
El-Sayed, Mater Chem.
[15] Abo El Ata AM, Attia SM, Meaz TM, Solid State Sci. 6 (2004) 61
Phys, EL 15 (1947) 174

Therefore, we suppose that IrL2 has high electroluminescence (EL) efficiency resulting from the improved ease of hole injection and electron trapping abilities, which can induce a build-in field in the EL layer and further accelerate the electron injection from ETL.
The experimental results have also indicated that the good EL performance of IrL2 can be attributed to its better carrier transport ability and shorter excited stated lifetimes [13].
Frisch et al (2009) Gaussian 09, Gaussian Inc.