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These exogenous heavy metals into the soil pathways can: Atmospheric deposition, sewage irrigation, solid waste dumps, agricultural fertility and materials use.
[2] Nan Zhongren, Liu Xiaowen etc, Jinchang city residential area distribution characteristics of heavy metals in soil research, Journal of arid land resources and environment 25(1):180-184,2011 [3] 2011 CUMCM problem A [4] Dongjun Liu, Zhihong Zou Water quality evaluation based on improved fuzzy matter-element method Journal of Environmental Sciences 2012, 24(7) 1210-1216 [5] Wang X, Melesse A M, McClain M E, Yang W, 2007.
Journal of the American Water Resources Association, 43(6):1383-1399
,Journal of Plant Nutrition, 30: 441-452
Seperation ,Science and Technology, 40:185-200.

An optical triangulation system is made up of mechanical and optical components some of which are amenable to design considerations, such as choice of laser-pointer, camera, and materials and others which are beyond the capabilities of the designer to adjust, such as reflectivity of the surface to be measured and nature of the medium through which light is transmitted and received.
Gershenfeld, in: Musical applications of Electric Field Sensing, Computer Music Journal, 21(3): p. 69-89. (1997)
Lee, in: Vision based laser-pointer interaction for flexible screens, Springer, Lecture note computer science LNCS-4551, (2007)
SaptoAdi, in: Visual based distance Measurement system using single laser-pointer design for underwater vehicle, Indian Journal of marine Science, Vol,38(3), Sep, PP.324-331, (2009)
Springer journal of Precision Agriculture,March, (2009)

Nitrile butadiene rubber is one of common sealing materials for electro-hydraulic servo mechanism.
Acknowledgement This study was supported by the National Natural Science Foundation of China (No.51075370, No.51105341), the Program for Zhejiang Leading Team of Science and Technology Innovation (2010R50005) and the Science Foundation of Zhejiang Sci-Tech University(No.1103824-Y).
“Study of simulation based optimal design for degradation test”, Journal of Astronautics, vol.29(1), pp.380-384, 2008
“Accelerated demonstration test method on Weibull distribution”, Journal of Zhejiang University (Engineering Scinece), vol. 35(1), pp.5-8, 2001
“Theory and method for simulation evaluation of accelerated life test plan under multiple stresses”, Journal of Astronautics, vol. 28(6), pp.1768-1773, 2007.

Signals of the bolts, surrounded and anchored by mortar and compacted clay, are comparatively regular, mostly because uniformity and density of the both materials are superior to concrete, which can be used to estimate the compaction of surrounding rock and anchorage medium in practice.
Acknowledgments I would like to acknowledge the support of the national natural science foundation of China (NO.51204098), and the natural science foundation of Hunan Province (NO.11JJ6045).
Zhu: China Safety Science Journal, Vol. 17(2007), p.172-75 [6] M.D.Beard, M.J.S.Lowe:.
Journal of Rock Mech. & Min.
Zou: Journal of Applied Geophysics, Vol. 59(2006), p.337–344

Materials and methods MBG ingredient MBG consists of two parts, one part is neutral polysaccharide, and the other part is acidic polysaccharide.
Handbook of Biopolymer-Based Materials: From Blends and Composites to Gels and Complex Networks:673-698
Electronic Journal of Polish Agricultural Universities Food Science and Technology 2001;4
Journal of Cereal Science 2005;42:173-184
Journal of Cereal Science 1998;28:165-174

Meanwhile, composite materials offer high strength, low thermal conductivity, high toughness, etc, which leads to the value of relative machinability Kv is very low and the composite materials is classified into the hard-cutting materials.
But the special properties of composite materials result in the difficulty in drilling, more and more researchers have put focus on the machining mechanism and quality during drilling composite materials.
Acknowledgements This work is supported by Important National Science & Technology Specific Projects (No.2009ZX04012-032-01) and Shandong Province Higher Educational Science and Technology Program (J13LB01).
International Journal of Machine Tools and Manufacture, 2003. 43(10): p. 1015-1022
Journal of Materials Processing Technology, 2008. 203(1-3): p. 342-348

Acknowledgments The research work was supported by National Science and Technology Major Project Foundation of China under Grant No. 2012ZX04005-021 and No. 2011ZX04002-132.
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Numerical simulation of eccentric extrusion form bending pipe parts Jishun SONG1,2,a, Yuntao LI1,3,b, Deheng DU1, Xu MA1,3, Kang YIN1 1School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China 2Key Laboratory of Display Materials & Photoelectric Devices (Tianjin University of Technology), Ministry of Education, Tianjin 300384, China 3Tianjin Key Lab for Photoelectric Materials & Devices, Tianjin 300384, China aJishun SONG E-mail: lgjs@163.com(Correspondence Author) bYuntao LI, E-mail: transramble@163.com(Correspondence Author) .
Using multi-billet extrusion (MBE), a number of different cross-sections in different sizes blank hole extrusion die, in the same or a different punch extrusion speed, the flow of materials, several convergence in the mold exit, welding, forming.
As a result of a single overall blank, the forming process does not exist defect in the soldering bridge mold, forming curved pipe can withstand a higher intensity of work; The role of eccentric squeeze through the forming process to achieve the numerical simulation, analysis obtained the following results: （1）Material flow model; （2）Stress distribution （3）Velocity field distribution （4）Load changes of extrusion process Establish finite element model Suppose: （1）Material in the mold within the isothermal flow ,materials friction and friction heat between materials and mold is negligible; （2）Non-stable material flow, and flow field distribution is related with time; （3）Incompressible plastic materials; （4）Inertia force, gravity, and other volume force is negligible.
Acknowledge: This work was supported by the National Natural Science Foundation of China, No.50975205, and Tianjin Key Subject for Materials Physics and Chemistry.
JOURNAL OF MATERIALS SCIENCE.Vol. 40 (2005), p.2007 [4] Chen, F.

Introduction Iron aluminides (Fe3Al, FeAl) are modern structural materials for high-temperature applications.
Hardness of the prepared materials was tested by the Vickers method with the load of 5 kg (HV 5).
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Vojtěch, Journal of Alloys and Compounds 497 (2010) 90–94 [8] P.
Michalcová, International Journal of Materials Research 100 (2009) 3

Strength Analysis of Rock Material Under The Brittle Shear Failure Mode[J].
Journal of University of Science and Technology Beijing, 2012, 34(12): 1364-1370.
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