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The seminar also made analysis of different surface materials and optimized the skid resistance performance. 1 Engineering Situation The 52km super long continuous downgrades last from Ya-Lu expressway K120 to K172.
Journal of Chang an University : Natural Science Edition,2003,23(1):7-10 [5] FAN Yue-wu, ZHAO Ke.
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Acknowledgements This work was financially supported by the traffic science and technology project of Hainan Province (JT20120898010).
Slope Stability Analysis of Sand Embankment for Expressway Engineering[J].Journal of Railway Engineering Society, 2008(9):1-6.
Analysis of Stability of Sand-filled Embankment Slope Covered with Weathered Rock Material[J].
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[6] Tsung-lin LEE，Hung-mingLIN,Yuh-pin LU.Assessment of highway slope failure using neural networks[J].Journal of Zhejiang university-science A,2009,10(1):101-108

The present results showed that the statistical method is a powerful tool for maximizing dextran production from Leuconostoc mesenteroides, and the optimized medium materials are simple and easy to obtain that can also be applied for large scale production.
Rodrigues：Biochemical Engineering Journal, Vol. 4 (2000) No. 3, p.177-188
Naessens, et al：Journal of Chemical Technology & Biotechnology, Vol. 80 (2005) No.8, p.845-860
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：Journal of Environmental Sciences-China, Vol. 23 (2011) No.1, p.22-30.

Greensand is composed of naturally occurring materials which are blended together; high quality silica sand (85-95%), bentonite clay (4-10%) as a binder, a carbonaceous additive (2-10%) to improve the casting surface finish, and water (2-5%) [6].
Noumowe, Effect of used-foundry sand on the mechanical properties of concrete: submitted to Journal of Construction and Building Material (2009)
Parkes, Clay-Bonded Foundry Sand, Applied Science Publishers Ltd., London, 1971 [9] O.A.
Omotoyinbo, Moulding properties of a Nigeria Silica-Clay Mixture for Foundry Use: submitted to Journal of Applied Clay Science (2009)
Thompson, Foundry Qualities and Applications of Local Synthetic Sand Mixtures: submitted to Journal of Applied Clay Science (1993)

In order to describe the mechanism of meso-damage of plastic materials and its evolution process, a suitable model should be established to describe the meso-structure of the material[6].
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Preparation and Ferroelectric Properties of BaTiO3 Nanotubes ZHU Ning1,a, WANG Lijie1,b, DENG Xiangyun1,2,c* 1College of Physics and Materials Science,Tianjin Normal University,Tianjin 300387,China 2Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228,China a744290124@qq.com, b983855761@163.com,cxiangyundtj@126.com Keywords: BaTiO3 nanotubes; hydrothermal synthesis method; ferroelectric properties Abstract: BaTiO3 nanotube arrays are prepared by hydrothermal reaction using the TiO2 nantotubes prepared by anodic oxidation reaction.
Ferroelectric one-dimensional nano materials became a main direction for the future development since Japanese Iijima synthesized the carbon nanotubes successful in 1991 [1].
Acknowledgements This work is supported by National Natural Science Foundation of China (50872093 and 50872094), the Ministry of Science Technology, China through 973-Project under Grant No. 2002CB613301 and the 863-Project under Grant No. 2007AA03Z524.
Journal of Function Materials. 33(2002) 240-245
Journal of the American Ceramic Society. 86(2004) 2215-2217

China 2College of Chemistry & Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, P.R.
Material .
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Experiment equipment, materials and method A high-power transverse flow CO2 laser device is applied in this research.
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The Influence of Operator Skills, Process Parameters and Materials on Clad Shape in Repair Using Laser Cladding by Wire.
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Acknowledgements The authors gratefully acknowledge the support of the National Natural Science Foundation of China (50702076), The science and technology key project of Chongqing(CSTC, 2007AB7014) and the Logistical Engineering University Academic Innovation Fund(YZ07-43301).
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