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Materials and methods Characteristics of materials.
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Use of volatile fatty acids from an acid-phase digester for denitrification, Journal of Biotechnology, Vol.114 (2004) No.3, P.289 [4] P.J.
Population dynamic succession and quantification of ammonia-oxidizing bacteria in a membrane bioreactor treating municipal wastewater, Journal of Hazardous Materials, Vol.165 (2009) No.1-3, P.796 [13] W.D.
Denitrifying dephosphatation performance link to microbial community structure, Journal of Water Sustainability, Vol.1 (2011) No. 3, P.269

The cutter ring material is required to have good characteristics of high rigidity and wear resistance.
This indicates that the ring material satisfied the requirements of application in engineering.
Cutter ring material is 40CrNiMoA; the value of elastic modulus material is 209GPa; poisson ratio is 0.3; thermal expansion coefficient is 1.15E-5 and room temperature is 20℃ (reference temperature).
Zhao: Journal of Shenyang Jianzhu University.
Carter: International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 8 (1984), p. 445-455 [9] Ministry of Water Resources Science and Technology Promotion Center: Full Face Rock Tunnel Boring Machine (Petroleum Industry Press, China 2005)

In theory, materials which can be processed into fibers can be made into nonwovens.
Many companies are using CaCO3 to lower the carbon footprint due to the favorable green-house gas profile of Calcium Carbonate and also to reduce the raw materials cost[7].
Chinese Journal of Polymer Science, 1988, 6(3): 285-288
Journal of textile and apparel, technology and management, 2006, 5(3)
Asian journal of civil engineering(building and housing), 2011, 12(5): 551-562

During the oxidation process both the Si face of the sample and the contact materials have been contaminated with oxygen, increasing roughness.
Wright et al., Materials Today, vol. 11, (2008), p. 16
Derluyn et al., Journal of Applied Physics, vol. 98, (2005), p. 054501
Nikitina, et al, Journal of Applied Physics., vol. 97,(2005), p. 083709
Fujii et al., Journal of Applied Physics, vol. 64, (1998), p. 5020

Fig.1: Profile Choose C30 as the strength of concrete material and Concrete Damaged Plasticity Model as the material model[6,7,9].
International Journal of Impact Engineering，2012(49)：158-164
Parameters Verification of Concrete Damaged Plastic Model of ABAQUS[J]．Journal of Building Structures, 2008，38 (8)：127-130
Nonlinear Finite Element Analysis and Examples with ABAQUS[M]．Beijing: Science Press, 2005
Journal of Yangtze University, 2013, 10(31)：103-105

Medical shape memory alloy applications - the market and its products, Materials Science and Engineering A, 378 (2004) 16-23
International Journal of Mechanical Sciences, 43(2001) 2657-2677
Advanced Materials Research, 457-458 (2012) 409-412
Smart Materials and Structures, 18 (095016) (2009) 1-9
Journal of Intelligent Materials Systems and Structures, 4 (2) (1993) 229-242.

Discussion on the use of the new research facility in the production of advanced materials for earth-based applications will be presented.
Major research areas include materials science, fluid dynamics and combustion.
Within the field of materials science, current areas of commercial interest are 'containerless' processing, crystal growth and metal/alloy/composite fabrication.
The PML is studying the burning of bulk metallic and polymer materials.
Key Engineering Materials Vol. 150 (1998), p. 141-152

Introduction Steel fiber reinforced concrete takes the plain concrete as the substrate, with steel fiber added, and forms a kind of composite material steel fiber reinforced concrete.
Acknowledgments This work is supported by Supported by Research Foundation for the Doctoral Program of Higher Education of China (20093415110001) and Anhui Provincial Natural Science Foundation of China (KJ2010A103) References [1] Wu Zhongwei.
[2] Li Guoxin, Li Qin,Yang Junfen,ect,in: China Architecture & Building Press, 2006 (In Chinese) [3] Sun Daosheng, Huang Xiaomin, Deng Min, ect,in:New Building Materials.(2004)1-4 (In Chinese) [4] O.Kayali, M.N.
[5] Gao Peiwei,Lu Xiaolin,Tang Mingshu,in:Journal of Wuhan University of Technology-Mater. (2009)2:150-153(In Chinese) [6] Luo Chengli, Wang Shuotai, Cui Hao,in:Sichuan Building Science 12(2008),168-170 (In Chinese) [7] Luiz Prudencio Jr.
Simon Austin ,ect,in: Materials and Structures (2006) 39:601–610.

Introduction Concrete is a kind of typical anti-pressure materials.
As a kind of polyphase composite materials, concrete contains many innate flaws and crack tips, which represent the heterogeneous characters at the meso-level.
Tang: Science in China (Series E) Vol. 44 (2001), p. 561
Tang: Chinese Journal of Computational Physics Vol. 20 (2003), p. 477.
Tang: Journal of University of Science and Technology of China Vol. 38 (2008), p. 1341.

Anhydrite：Show columnar, about 0.1 mm size, mainly distributed in specularite aggregation Grain size distribution of hematite The grain size distribution analysis is the material analysis which does for the determination utility size range wide material group granularity and the size composition.
Acknowledgements This work was financially supported by the Jiangxi science and technology support program (2010BGA00200) and Jiangxi Ministry of Education science and technology Foundation (GJJ10161).
References [1] Jiang-an Chen and En-Ming Gong: Journal of Jiangxi University of Science and Technology.
Vol.30.(2009), p.4-7(In chinese) [2] Bei-lin Liu: Journal of the South Institute of Metallurgy.
Jie ZENG and En-Ming Gong: Journal of Jiangxi University of Science and Technology.