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The elastic material was adopted as the rock material for the calculation.
[3] R.Q.Huang, W.L.Li: Chinese Journal of Rock Mechanics and Engineering.
[9] Y.L.HE, S.Y.LU:Chinese Journal of Geotechnical Engineering.
[10] D.PENG, L.L.CHENG: Journal of Yangtze River Scientific Research Institute.
[11] L.J.TAO, S.R.SU, Z.Y.ZHANG:Journal of Engineering Geology.

Materials and methods Strains and culture conditions.
Acknowledgements This project was financially supported by the natural science foundation of Heilongjiang province (C201118).
Qi: Journal of south China agricultural university Vol. 4(2003), p. 24-27 [3] S Q Chen, B Wu, Z Qin, G Z Liu L Deng, X M Deng: Journal of southwest agricultural.
He：Gansu agricultural science and technology Vol. 9(2002), p. 44-45 [9] C.F.
Zhang: Soybean science Vol. 24(2005), p. 171-175 [13] D.M.

The cavities inside the panel can be filled with various materials，such as concrete or insulation materials to serve different purposes，such as to increase the strength or the thermal and sound insulation of the walls[1,2,3,4].
This paper based on microcosmic mechanics rectangle model educed equivalent shear stiffness on the premise of equal strain, which is beneficial to one structure consists of more than two materials differed greatly in stiffness.
Dare, Axial and Shear Behavior of Glass Fiber Reinforced Gypsum Wall Panels: Tests, Journal of Composites for Construction, ASCE. 8(6) (2004)569-578
[3] Wu YF,The structural behavior and design methodology for a new building system consisting of glass fiber reinforced gypsum panels, Construction and Building Materials. 23(2009)2905-2913
(Natural Science Edition).38(5)(2006)639-645

It can change the product shape and properties by changing the type and composition of raw materials, and the final product with different properties are obtained.
The reports are often seen about hyperbranched and its application in functional materials area, such as luminescent materials, special coatings, nano-materials.
Materials and methods Main Materials.
European Polymer Journal.
Chemical Engineering Journal.

Corrosion of Biodegradable Implant Mg-2Ca-xZn Alloy in Simulated Body Fluid with the Addition of Zn Wang Jijie1, a, Feng Yuejiao1,b, Cui Tong2,c, Jiang Da1,d, Li Na1,e, Liu Chunzhong1,f 1School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang, 110136, Liaoning, China, 2College of Materials and Metallogy, Northeastern University, Shenyang 110004, Liaoning, China; awangjijie@sau.edu.cn, bfengyuejiao002@126.com, cct114928@163.com, djiangda1002@tom.com, elina6568@126.com, fczliu@sau.edu.cn Keywords: Biological magnesium alloy, Corrosion resistance, Hank solution, Hardness.
Therefore, magnesium alloys as hard tissue repair material and cardiovascular stents materials in clinical medicine has wide prospect in applications[4-10].
Li: Introduction of biomedical materials.
Wang: Journal of Clinical Rehabilitative Tissue Engineering Research, Vol.18, (2007), p. 3584
Wang: The Chinese Journal of Nonferrous Metals.

Material and Methods Materials and instruments.
Velvet antler residue powder were obtained from Jilin Sino-ROK institute of animal science (Changchun, China), and stored at -20℃ until use.
Bhagwat , D.M Sakarkar: Indian Journal of Traditional Know ledge Vol.9 (2010) No.2, p. 245
Kim: Journal of Agricultural and Food Chemistry Vol.53 (2005) No.3, p.581
Cui, H.W Ding: Innovative Food Science & Emerging Technologies Vol.9 (2008), p. 306

Researchers have identified many reasons for delays in construction projects, most of the important reasons identified in the last decade from these studies as causes of this delay included poor management, financial difficulties by contractor, change orders by client during construction [1-5], shortage of labours, mistakes and discrepancies in design documents [2, 4, 5, 6, 7], delay in payments by client and delay in delivery of materials to site [4, 5, 8, 9, 10].
The overall ranking of most important factors of causes of delays, their effects and effective methods of minimizing delay on construction projects was obtained by the mean rank score (Ms) by using Statistical Package for Social Science (SPSS) version 18 .
Al-Momani: Construction Delay a Quantitative Analysis, International Journal of Project Management, Vol. 18 (2000), pp. 51-59 [2] L.
Ismail: Significant Factors Causing and Effects of Delay in Iranian Construction Projects, Australian Journal of Basic and Applied Sciences (2011), in press
Ismail: Study of Methods for Minimizing Construction Delays, Evidences from a Developing Country, Advanced Materials Research, Vol. 201-203 (2011), PP. 2939-2942

Lambrakos1, b 1 Naval Research Laboratory, Materials Science and Technology, 4555 Overlook Ave., SW, Washington, DC 20375, U.S.A.
Such a capability will enable the production of unusual materials and structures.
This class of materials is called functionally-graded materials or FGMs.
Lambrakos: submitted to Journal of Materials Engineering and Performance, (2010) [4] K.P.
Cooper, Journal of Materials Engineering and Performance, (07 Jul 2009), published on-line

Babu Rao et al, “Production of nano structured silicon carbide by high energy ball milling,” International Journal of Engineering, Science and Technology Vol. 3, No. 4, 2011, pp. 82-88
Journal of Refractory Metals and Hard Materials 29 (2011) 10–13
Journal of Refractory Metals and Hard Materials 29 (2011) 645–650
Mordike, “Magnesium strengthened by SiC nanoparticles,” Materials Science and Engineering A298 (2001) 193–199
Shaw et al, “Synthesis of nanostructured Si3N4/SiC composite powders through high energy reaction milling,” Materials Science and Engineering A 244 (1998) 113–126

It can be used to measure some surface tension of the material under special environmental conditions (temperature, pressure)[6] too.It is widely used in metallurgy, chemical industry, mineral processing, materials, geological, teaching and other areas [7].
Experimental materials K2O-SiO2(K2O 61% , SiO2 39%) glass around 0.3g; Graphite supporting plate, use fine sandpaper to make the surface smooth [12].
Materials Science and Engineering Journal, 2008, 26(6): 932-936.
Rare Metal Materials and Engineering. 2009, 38(2): 792-794.
Materials Review, 2007, 21(5A): 425-427.