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CT images can approximately reflect the change of the material internal density.
Science and Technology of Tianjin, 2006 [2] Huayang Lei, Shufang Xiao.
Journal of Geotechnical Engineering, 2000, 2 [5] Xiaojun Li, Dengliang Zhang.
Journal of Geotechnical Engineering, 2000, 23 (2) : 205-209 [6] Guifen Wu.
Journal of Chongqing University, 2003, (6) : 96-100

Introduction Higher process forces during friction stir welding of high temperature melting point materials hindered its applications to weld steels.
In the last decade, Friction stir welding (FSW) has extensively used especially to weld soft materials with good quality.
This will bring down the yield strength of materials to be joined by increasing the initial material temperature for the FSW process and which in turn reduce the heat input required from the tool and the frictional loads.
Feng, Characterization of Multilayered Multipass Friction Stir Weld on ASTM A572 G50 Steel, Welding Journal. (2014) 443S-450S
Fujii, Microstructure and mechanical properties of S45C steel prepared by laser-assisted friction stir welding, Materials & Design. 47 (2013) 842-849

O: Meat Science, Vol.1(1996), pp.99 -109
G: Meat Science, Vol.24(1989), pp.43-58
Chen: Food Science, Vol.26(2005), pp.234-238
Brewer: Journal of Food Science, Vol.66(2006), pp1230-1320 [6] M.
Dai: Agricultural Engineering Journal, Vol.3(2003), pp.156－160

After the CFRP plates release, concrete in tensile region was uncracked, the strains in the reinforcement and concrete are directly proportional to the distance from the neutral axis, so beams can be calculated as homogeneous and elasticity material.
Acknowledgements This work was financially supported by the Guangxi Natural Science Foundation Key Project (0832002Z), Guangxi Natural Science Foundation (2010GXNSFB013006), Guangxi Science Research and Technology Development Project (0992001-13), and Guangxi University of Technology Science Foundation (040004).
References [1]R.G.Wight, M.F.Green, and M-A.Erki: Journal of composites for construction, Vol. 5(2001), No.4, pp.214-220
[2] R.J.Quantrill and L.C.Hollaway: Composites Science and Technology, Vol.58 (1998), No.8,pp. 1259-1275
[4] Hua Chen: Journal of Guilin University of Technology, Vol. 29 (2009) No.1, pp.81-84.

Research Site Located in the science garden of Zhangpu County, Zhangzhou prefectural-level monopoly,south of Fujian Province,the research sites is 27km from Zhangpu County site.
Data and Method Soil particles size analysis is conductive to distinguish the depositional environment, judge the kinds of material handling and hydrodynamic conditions and the trend of particles change[1].
Choose the suit sites to begin fieldwork by the guidance of geography and soil science.
On the other hand, for the gentle and under fall of slope, especially the gradient under 25 °, the terrain is smooth, with plenty of water and heat, fine grains and good soil fertility, and convenient transportation, is the optimal area in the science garden.
References [1] C.X.Xiao,Z.Z.Li, Journal of Xinjiang Normal University(Natural Sciences).3(2006),p.118-123 [2] B.Quan, Master’s Degree Thesis of Fujian Normal University.(1999)35 [3] M.Zhang,H.J.Zhu, Journal of Fujian Teachers University(Natural Science).4(2000),p.98-103 [4] South Subtropical Crops’ Development Office of The Ministry of Agriculture, Fruit Tree of Tropical and Subtropical in China, China Agriculture Press,Beijing(1998)

Introduction Cu-graphite composite material is a type of the most popular metal-graphite brush material.
With the development of science and technology, motor industry calls for better performed brush material, and the currently-used Cu-graphite composite material can no longer meet the requirement of the time.
I Material preparation and experiment methods 1.1 Preparation of composite materials The materials used in the experiment are as follows: a) carbon fibers, produced by Shanghai Carbon Works, the tensile strength of which is 2580MPa, density 1.77g/cm3, single wire diameter less than 7μm; b) conductive ceramic particles Ti3SiC2, produced by ceramic material research institute of Tsinghua University, which were prepared after 320 mesh; c) copper powder, produced by Beijing Youyan Powder Company, Ltd., which was electrolytic copper powder of 320 mesh; d) graphite powder, by Shandong Nanshu Graphite Mine, which was 300-mesh flake graphite powder.
References [1] LI Shi-bo, CHENG Lai-fei, WANG Dong, et al: Acta material compositae sinica (In Chinese) 2002,19(6):20-24 [2] Gao N F, Miyamoto Y, Zhang D: Materials Letters (2002) 55：61-66 [3] Yi Zhang, Zhimei Sun, Yanchun Zhou: Mat Res Innovat (1999)3:80-84 [4] ZHANG Yi, ZHOU Yanchun: Acta metallurgica sinica (In Chinese) 2000,36(6):662-666 [5] Zhou Y, Chen B, Wang X,et al : Materials Science and Technology,2004 (20):661-665
[6] XU Shao-fan, XU Shao-ping, ZHAO Qing-bi, et al: Metallic functional materials (In Chinese) 2008,15(6):18-21 [7] XU Shao-fan, XU Shao-ping, JIAN Feng , et al: Transactions of materials and heat treatment (In Chinese) 2009,30(5):35-38 [8] GAO Qiang, WU Yu-ying, ZHANG Guo-din, et al: The Chinese journal of nonferrous metals 2000,10 S(1)97-101 [9] XU Shao-fan, WANG Wen-fang, FENG Yi, et al: Tribology (In Chinese) 1998,18(3)254-258 [10] ZHI Guang-lin, MEI Bing-chu, ZHOU Wei-bing, et al: Rare metals letters (In Chinese) 2007,26(7):34-38 [11] ZHOU Wei-bing, MEI Bing-chu, ZHU Jiao-qun, et al: Journal of wuhan university of technology (In Chinese) 2009,31(12):23-25 [12] ZHANG Zhong-bao, XU Shao-fan: Rare Metals (In Chinese) ,2007,26 (4) :359-364

International Journal of Production Economics, 2006, 103(2006): 271-285. ][[] Cai J, M.
To reduce planning costs and errors, directors decides to use the DF technology for planning assessment, including the facilities layout of workshop and the materials handling, they want to assess these in 3D virtual scene.
But the layout simulation can’t simulate the impact of dynamic factors in the materials handling; and the layout model has to be re-established in materials handling simulation analysis if considering the details of the layout.
To reduce the modeling workload, the layout model and materials handling model will be built in the DF platform, multi-level modeling will combine the two models and run it with multi-resolution simulation (Fig. 3).
Virtual reality simulation of the layout model can be used in the analysis of materials handling simulation.

Experimental Materials Poly(vinyl alcohol) (PVA, Sigma Aldrich 99%, average 146.000-186.000 g/mol), ethyl alcohol (Sigma Aldrich 99.8%) as a solvent, citric acid (ACIT, Sigma Aldrich 99%) and 4-sulpho-phthalic acid (SULPHO, Sigma Aldrich 50%) as crosslinking agents (CA).
The samples were taken up to 1000ºC, in order to burn all the material present.
Khan: Journal of Membrane Science Vol. 259 (2005), p. 10
Kerres: Journal of Membrane Science Vol. 185 (2001), p. 3
Bijkerk: Applied Surface Science Vol. 258 (2011), p. 7

Applicability from earthworms to live in the soil with PAHs Xin Yuana, Shengwang Panb,Guopu Mac, Qiulin Hed* a.Department of National Defense Architecture Planning & Environmental Engineering,LEU, Chongqing 401311 China. b.Environment Science and Engineering Institute of Chengdu University, Chengdu 610106, China. c.
Dept. of Management Science & Engineering, LEU, Chongqing 401311, Chinad.Department of Civil Engineering, LEU, Chongqing 401311 China.
Materials and methods Experimental materials Soil samples were neutral purple soil from southwest China, with pH7.19, 22.3g.kg-1 organic matter, 114.6, 24.7, 94.8mg.kg-1 of available N, P and K respectively, and 27.43cmo1.kg-1 cation exchange capacity.The similar sized sample earthworms were Pheretima sp collected from un-polluted and unperturbed wasteland, with the length between 7-8cm and average fresh weight of 0.4g, no clitellums.
Journal of Agro-environment Science, 2005,24(5):1003-1006
Journal of Environmental Quality, 1996, 25:212-218

At present, waterproof materials in China has been developed from organic materials such as fetal asphalt felt paper rule all the land, into two major categories of waterproof materials: rigid waterproof materials and flexible waterproof materials [3].
Flexible waterproof materials are mainly high polymer materials which are prepared by means of polymerization and modification, although waterproof effect is good, but organic materials are usually easy to age.
K.: New Building Materials 1999(8), p.31 [3] Ye C.
H.: China Building Materials Science & Technology. 2012 (3), p.61 [5] Shang J.
F.: Journal of University of Jinan (Science and Technology) Vol.16 (1)2002, P.6