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Nondestructive testing for support quality of tunnel Lan Qiao1, a, Ming Cui 2,b, Qing-chi Cai3,c 1Department of Civil Engineering, University of Science and Technology Beijing, Beijng 100086, China 2Department of Civil Engineering, University of Science and Technology Beijing, Beijng 100086, China 3Department of Civil Engineering, University of Science and Technology Beijing, Beijng 100086, China aemail: 15210565467@139.com bemail:848550383@qq.com cemail:295807506@qq.com Keywords: tunnel support; nondestructive testing; the position of I beam; impact-echo Abstract：A tunnel in Chengde collapsed several times and cracks existed in the second lining.
According the propagation theory of electromagnetic wave, GPR emit the high-frequency electromagnetic waves, broadband with short pulse, when it encounters interface surface of bi-component material, the processing image and interpretation facilitate the identification of hidden object.
International Journal of Rock Mechanics and Mining Sciences 2004;41(1):147-57
Chinese Journal of Rock Mechanics and Engineering. 2004;23(10):1741-4(in Chinese).

Research on Deformation Mechanism of Surrounding Rock during Excavation of Large-span Shallow-buried Double-arch Tunnel Sun Shaorui 1, a, Lu Yexu2,b , Zhang Shaohua3,c and Wu Jimin4,d 1 College of earth science and engineering, Hohai University, China 2 College of earth science and engineering, Hohai University, China 3 Jiangsu provincial communication planning and design institute Co.
For initial concrete spraying which is considered as elastic material, K=3.33GPa,G=0.34GPa, ρ =2500kg/m3.In the calculation process of strength reduction, the shear strength parameters c and φ are reduced by factor Fs which has an initial value 1.0 and 0.1 increment per step, until failure occurs in surrounding rock.
AKNOWLEDGEMENT This work is supported by the National Natural Science Foundation of China (No. 41002089 & 41102162).
Journal of Structural Engineering, Vol.12(1995),p.495~501 [6] Lane.
Journal of Geotechnical and Geoenvironmental Engineering,Vol.126(2000),p.443~450 [7] Dawson E.

The Research on the Flexible Integrated Research Platform of the Solar Energy Photovoltaic System Qiushuang Liu1a, Xiaoli Xu, Xiaoli Xu2b 1School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China 2Key Laboratory of Modern Measurement & Control Technology (Ministry of Education) Beijing Information Science & Technology University, Beijing, China aqiuemail@sina.com, bxuxiaoli@bistu.edu.cn Keywords:systematic flexible integration, electromechanical integration, concentrator photovoltaic system Abstract.
By analyzing the various elements affecting the optical efficiency of the concentrating system and putting forward a solution, and investigating the integrated optimization method of the hybrid concentrating system, we can reduce the specular reflection loss of the concentrating system, material absorption loss, structural loss and other kinds of energy loss [9].
Acknowledgement This work is supported by Key Project of Science and Technique Development Plan Supported by Beijing Municipal Commission of Education（KZ200910772001）, Funding Project for Academic Human Resources Develoment in Institutions of Higher Learning under the Jurisdiction of Beijing Municipalipality（PHR20090518），Open Project Supported by Beijing Key Laboratory on Measurement and Control of Mechanical and Electrical System（KF20091123206, KF2009112302，KF20101123204）.
Liu,”The Research on the Flexible Integrated Mechanism and Systematic Constitution of the System Development of Modern Instrument,” Academic Journal of Beijing Information Science Technology University: JCR Science Edition, 2nd ed.,2009, pp. 19-23
Wu, “IFDS for modern instrument manufacturing,” Chinese Journal of Scientific Instrument, 4th ed., vol. 29,2008,pp. 679-683

Waste residue, abandoned brick, abandoned concrete, broken glass, plastic waste, waste wood and the outer packing materials of construction materials can all be recycled, such as: (1) Shatter waste brick, some cement and abandoned concrete blocks.
(2) Reuse the waste wood in all sorts of ways. ①shattered into crumbs, through fibrosis into woodiness fiber board adiabatic materials, and then used in building again; ②by means of being sorted, crushed, removed not pure content, cut, then made into room floor and exterior decoration materials, etc.; In addition, the outer packing waste paper of construction materials, bubble can also be processed into fiber products as indoor insulation materials
If the purity of broken glass is high ,they cab be processed into flat glass, microcrystalline glass, etc.; otherwise can be processed into porous lightweight construction materials, such as the decoration materials, insulation materials and so on
The Way of Resourcializing Comprehensive Utilize Construction Waste [J], China Building Materials, 2011(003).
Building Science, 2010 (5).

They have never been heard before in literatures from the view point of their utility as engineering material.
Due to environment and sustainability issues, there are a remarkable achievements in green technology in the field of materials science through the development of bio-composites.
The main advantage of using renewable materials is that the global CO2 balance is kept at a stable level.
Keeping this in view, a detailed literature surveyed has been carried out through various issues of the Journals related to this field.
The Impact test has been performed to assess the shock absorbing capacity of different material systems.

Paulc Department of Materials Engineering, Indian Institute of Science, Bangalore – 560012, India asoma.skb@gmail.com, brravi@materials.iisc.ernet.in, caloke@materials.iisc.ernet.in Keywords: Interdiffusion, m phase, crystal structure Abstract.
However, the diffusion parameters are materials constant and do not depend on the end member compositions.
Paul: Journal of Materials Science Vol. 46 (2011), p. 889 [12] S.S.K.
Paul: Metallurgical and Materials Transactions A, Vol. 41A (2010), p. 2175 [13] S.S.K.
Paul: Metallurgical and Materials Transactions, available online, 2011 (DOI: 10.1007/s11661-011-0715-y) [14] C.

The materials were used were knitted PLLA, braided collagen and also braided PLLA.
It was around 48 weeks and the other materials degraded around 4 weeks-20 weeks.
Materials and Method Materials.
From this result, it can be concluded the braided-twisted fiber scaffold was nontoxic materials.
Journal of Biomechanics 40 (2007) 2029–2036.

Zavaliangos: Materials Science and Engineering A, 289(1-2), pp. 228-240, (2000)
Fan: International materials reviews, 47 (2), pp. 1-37, (2002)
Kharrazi: Materials and Design, 30(1), pp. 115–121, (2009)
Ghassemi: Materials and design, 30 (5), pp. 1762-1767, (2009)
Jones: Journal of Materials Science, 43 (16), pp. 5456−5469, (2008)

Piezoelectric micro-electro-mechanical systems are MEMS with piezoelectric materials as sensing and actuating materials which have received much attention due to their unique and promising features over the past decades.
Table 1 Material parameter used in computation Materials 44c 2 10 10 mN× ρ 3 3 10 mkg× 15e 2 mC 11ε mF 10 10−× C-6 1.90 7.65 14.5 91.95 Pyrex glass 2.58 2.19 0 0.407 The dispersion relation is often a key for evaluating elastic constants, thickness, or subsurface defects in ultrasonic NDE of plates or films.
Wang: Key Engineering Materials Vol. 183-187 (2000), p. 755 [5] Q.
Tateno: Key Engineering Materials Vol. 261-263 (2004), p. 251 [10] H.
Shibuya: Proceedings of the 10 th International Symposium on Nondestructive Characterization of Materials, Karuizawa Japan (2000), pp. 26-30 [11] K.

Ruschau：Metallurgical and Materials Transactions A，Volume 31A, September pp.2000—2181 [5] T.
Serajzadeh: Journal of Materials Engineering and Performance, 2010, Volume. 19-9, December(2009), pp.1256— 1263 [6] A.H.
Metallurgical and Materials Transactions A, Vol. 41A,( 2010) , pp: 957-971
[7] Mahoney M W，Rhodes C G，Flintof J G.eta1．Metallurgical and Materials Transactions A, Vol.29, (1998). pp: 1955—1964
Aerospace Materials & Technolgy, Vol, 6, (2008), pp:77-80.