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Acknowledgements This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2012-0007557).
Kim, Analysis of the Factors Influencing Construction Productivity, Journal of Architectural Institute of Korea, Vol. 10 (1994), p. 264
Lee, An Analysis on the Factors Decreasing Productivity of Building Construction, Journal of Architectural Institute of Korea, Vol. 18 (2002), p. 125
Shin, Comparison of the factors improving construction productivity between Korean and Chinese laborers in Korea, Applied Mechanics and Materials, Vol. 256-259 (2013), p. 3016
Tang, Motivation of Survey Employees in Construction Projects, Journal of Geospatial Engineers, Vol. 5 (2003), p. 61

Materials and Methods Palm Ash.
Palm ash from local palm oil mill was used as raw materials to produce silica materials.
The materials were dried at 600C for 60 min in the oven, and then combusted at 8000C for 30 min in the tube furnace (VT Furnace, Model HTF-15/20).
“High-purity Amorphous Silica Originated in Rice Husks via Carboxylic Acid Leaching Process”, Journal of Materials Science, vol. 43 (2008), p. 7084-7090
“Effect of Nitric Acid Digestion on Organic Materials and Silica in Rice Husk”, J.

The values of the material properties used in this study are seen in reference [8].
The Governing Equations for the Mass Conservation, Momentum as Well as Energy Transport.Continuity conservation, momentum and energy conservation equtions can be seen in materials.
Acknowledgements This work was prepared with the support of the Financial Support on the Hall of Shanxi province science and technology research projects(No.20100321059) and Aeronautical Science Foundation of China(No. 2011ZE2200) References [1] M.
A., Effects of laser parameters on porosity formation: Investigating millimeter scale continuous wave Nd:YAG welds, Welding Journal, 90(2011)198s-203s
F, Pore formation during hybrid laser-tungsten inert gas arc welding of magnesium alloy AZ31B—mechanism and remedy, Materials Science and Engineering,A 390,(2005)76-80

Effect of Melamine Content in MUF Resin on the Durable Properties of Plywood Xiaoying Liu1,a, Jizhi Zhang1,b, Yonglin Yang1,c, Shifeng Zhang1,d and Jianzhang Li1,e* 1College of Material Science and Technology, Key Laboratory of the Ministry of Education of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, P.R.China agoldwingslxy@gmail.com, bzjzvip@gmail.com, clinpotterx@163.com, dhnzsf142@126.com, elijianzhang126@126.com *To whom correspondence should be addressed: e-mail: lijianzhang126@126.com Keywords: urea formaldehyde resin; melamine; durable properties of plywood Abstract.
Experimental Materials for UF resin.
Conner, UREA-FORMALDEHYDE ADHESIVE RESINS, Polymeric Materials. 11 (1996) 8496-8501
Christjanson, CHANGES IN CURING BEHAVIOUR OF AMINORESINS DURING STORAGE, Journal of Thermal Analysis and Calorimetry. 80 (2005) 123-130
[8] Zhenhua Gao, Xiang-Ming Wang, Hui Wan, Curing Properties of Urea-Formaldehyde Resin in the Presence of Various Amounts of Wood Extracts and Catalysts, Journal of Applied Polymer Science. 107 (2008) 1555-1562.

Acknowledgements This work is supported by Province Science technology program of Liao Ning, China 2008221014 & education Science Foundation of Liao Ning of China under Grant No.L2010397 References [1] C.P.
Putzer: Science Vol.267 (1995), p.1338-1340
Shi,Y.Dong, Y.Huang：Chinese Journal of materials research, Vol. 22(2008),p379-382
Zhang:Handbook of Physical Constants, Beijing Science Press, 1979, p. 84 (in Chinese)
Borisova: Journal of Alloys and Compounds Vol. 372 (2004), p.141-147

Acknowledgment The authors are grateful for National Natural Science Foundation of China (21201085 and 21276116), Postdoctoral Science Foundation of China (2012M511202 and 2011M500853), Open Project of the Key Laboratory of Nanodevices and Applications (grant number 13ZS02).
Tong, Materials Research Bulletin, vol. 47, pp. 580-585, Mar 2012
Jaroniec, Journal of Colloid and Interface Science, vol. 357, pp. 223-228, May 2011
Mathur, Journal of Materials Chemistry, vol. 22, pp. 20472-20476, 2012
Ran, Energy & Environmental Science, vol. 4, pp. 1364-1371, Apr 2011

Mechanical properties of materials vary depending on strain rate.
The model is a phenomenological model: It is not based on the traditional plasticity theory which reproduces several important material responses observed in impact and penetration of materials.
Table 2 lists the mechanical properties of the as-received materials.
Nia, A three-dimensional simulation of shot peening process using multiple shot impacts, Journal of Materials Processing Technology 164-165 (2005) 1226-1234
Nemati, The effects of deep rolling and shot peening on fretting fatigue resistance of Aluminum-7075-T6, Material Science and Engineering A 516 (2009) 235-247

Currently the agricultural wastes biology materials using as adsorbent for heavy metals removal were rice straw, corn bars, bagassem, peanut shell, soybean hulls, corncobs,et al.
The raw materials themselves have some natural group and micro-pore structure for ion-exchange adsorption, can using for adsorption of some heavy metal ions, But adsorption capacity also needs to be improved.
Disposal of agricultural waste by chemical modification, increasing its surface area or active groups, can assign higher adsorption performance for these biology materials [3-5],.
There was a great amount of corncobs materials in agriculture wastes every years and the corncobs materials was cheap and easy to get.
References [1] Runhu Zhang*, Bo Wang, Hongzhu Ma:Desalination, Vol. 255 (2010), p. 61 [2] Sonia Recillas, Joan Colón, Eudald Casals, Edgar González, Victor Puntes, c, Antoni Sánchez*:Journal of Hazardous Materials, Vol. 184 (2010), p. 425 [3] Leandro Vinícius Alves Gurgela, Júlio César Perin de Meloc, Jorge Carvalho de Lenab, Laurent Frédéric Gil：Bioresource Technology，Vol. 110 (2009), p. 3214 [4] Yanmei Zhou*, Qiang Jin, Tianwei Zhu, Tongsen Ma & Xiaoyi Hu:Separation Science and Technology, Vol. 47 (2012), p. 157 [5] Yanmei Zhou,∗, Qiang Jin, Tianwei Zhu, Yoshifumi Akama: Journal of Hazardous Materials.

Microstructure and Properties of AZ31B Magnesium-LY12 Aluminum Alloys Diffusion-bonded Joint Shuang-ming DU and Qian QIN College of material science and engineering, Xi’an University of Science and Technology, Xi’an 710054, China College of material science and engineering, Xi’an University of Science and Technology, Xi’an 710054, China shuangmingdu@163.com, qianqincl@163.com Qian QIN Keywords: AZ31B/LY12, Diffusion bonding, Microstructure, Mechanical properties.
So the vacuum diffusion welding have received more attention in the welding of dissimilar materials, but it forms a series of MgxAly brittle intermetallic compound at the joint due to the very small mutual solubility of the two materials while welding Mg/Al by diffusion welding directly, which deteriorates the microstructure and mechanical properties of welding joint [5].
Research shows that, the middle layer of suitable material has a positive effect on inhibiting formation of brittle intermetallic compound between dissimilar metals, and is an important way to improve the welding properties of diffusion welding about dissimilar materials [6,7].
Aerospace Materials and Technology In Chinese, 2010, 4:1 - 4 [3] Ying Chen, Gaofeng Quan, Changbin Shen, et al.
Journal of Materials In Chinese, 2008, 12 (22): 346 - 348 [4] Hongzhou Fang, Jicai Feng.

The microstructure evolution of material is impact directly the mechanic performance of the component in superplastic forming.
The growth grain will fall the distortion capability of materials and brings cracks and ruptures easily.
[3] GAO Chong-yang, FANG You-tong: Journal of Zhejiang University SCIENCE, NO.7(2005), p .711-715
DebRoy: Welding Journal Research Supplement, Vol. 79 (2000), p. 97-112
[5] Wang Li-juan et al: Journal of plasticity engineering, Vol. 11(2004), p. 67-70