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The study situation of concrete material size effect[8-10] There are various reasons for the presence of size effect in concrete material.
Concrete is a construction material normally used to withstand compressive force.
ACI Structural Journal, Vol. 7-8 (1999), p.482
ACI Structural Journal, Vol. 9 (2002),p.701
ACI Journal, Vol.64 (1967) No.3, p.138

Chinese Journal of Rock Mechanics and Engineering, 2011, 30（s1）：3066～3073
Chinese Journal of Underground Space and Engineering, 2012, 08(01): 65~70
Journal of Architecture and Civil Engineering, 2011, 28(01)：100～105
Chinese Journal of Underground Space and Engineering, 2011, 07(02): 361~365
Journal of Chongqing Jiaotong University(Natural Science), 2008, 27(02): 225~289

Following this early work, experiments on superplastic flow spread to many laboratories around the world so that it is now an established research activity in the field of Materials Science.
Al-Mg-Sc alloys are excellent candidate materials for achieving high superplastic elongations when pulling in tension.
Langdon, The mechanical properties of superplastic materials, Metall.
Langdon, Deformation mechanism maps for superplastic materials, Scripta Mater. 10 (1976) 759-762
Langdon, Review: achieving superplastic properties in ultrafine-grained materials at high temperatures, J.

Materials & Design, 56(2014) 990-997
Materials Science and Engineering A, 262(1999) 271-278
Materials Science and Engineering A, 381(2004)143-153
Materials Engineering, 1(2004)3-8
Materials Engineering, 7(2006)43-47.

Materials Engineering UFSCar.
MATERIALS AND METHODS Materials The polymer matrix used was a polyamide 6 with a molar mass of 10,500g/mole, supplied by Rhodia/SP in the form of granules of white coloration.
The process variables influenced the mechanical and thermo-mechanical properties of materials.
Diaz: Key Engineering Materials Vol. 189-191 (2001), p. 203
Dubois: Materials Science and Engineering Vol. 28 (2000), p. 1.

Acknowledgements This work is Supported by National Natural Science Foundation of China (Granted No. 10972146), Program for Changjiang Scholars and Innovative Research Team in University (No.
International Journal of Nonlinear Sciences and Numerical Simulation 2005;(6)2:139-144
Journal of Intelligent material systems and structures 2006;(10)1: 3-14

Wavelet Transformation Mold Maximum Value Marginal Check In view of some kind of material quality's rail we carry on the exchange flash welding, and in the heading quantity fixed situation, the factors which affect the weld joint quality are the flash stability and the weld joint temperature field.
Fig. 7 Carrying on each kind of operator to it the marginal check Acknowledgements This work was supported by the National Science Foundation of China(51105344), and partly supported by Foundation for University Key Teacher of Henan Province of China (2011GGJS-137) and the Opening Project of Key Laboratory of Precision Manufacturing technology and engineering Henan Polytechnic University (PMTE201002A).
Li: Journal of Vibration, Measurement & Diagnosis, Vol. 24 (2004) No.1, pp. 121-122
Ge: Journal of He Fei Uni-versity of Technology (Natural Science), Vol. 25 (2002) No. 2, pp.167-172. ( in Chinese)

Boundary element - Laplace transform method, basic formula Set isotropic , homogeneous , linear elastic displacement and stress cracking body R , and flexibility to meet the equations of motion , physical equations and boundary conditions , the entire elastomer displacement at t = 0+ time , speed : (1) Laplacian function is defined as: (2) After the Laplace transform elasticity equations of motion after the physical equations and boundary conditions are (3) (4) (5) ; is Physical density of the Laplace transform of elastomer type.C1, C2 for the P-wave, S-wave velocity and G, is the elastic constant of the material, ρ is the mass density.      
References [1] P.K.Banerjee and R.Buttertield：Boundary Element Methods in Engineering science, McGraw –Hill.
New York , 2000 [2] Jiang Fengchun ,Liu Rui Tong,Liu Kui Hall:Dynamic stress intensity factor response theory analysis,Journal of Vibration Engineering(chian)[J],2000,vol4,p60-64 [3] G.C Sih: Mechanics of Fracture ,1991.p268
[4] Xuejun.Zhao, Dynamiccrack starting Research Progress,[J] Building Science , china,2009,7,p85-88 [5] Youlin.Liu, ,Dynamic response of the beam structure With a Crack, [J] Journal of sunyatsen university,china,2012,10,p52-55

The analytical solution of slope stability is hardly obtained, because of the complex factors restriction, such as geological landform, boundary conditions, material stress, strain of nonlinear, water pressure, the coupling analysis of seismic load.
Acknowledgements Supported by Beijing Higher Education Young Elite Teacher Project (YETP1440), China Natural Science Foundation (41172250),“Twelfth Five-year” National Science and Technology Support Project (2012BAK09B06), The innovative team of Beijing.
Journal of Engineering Geology. (2008), p.278.
(In Chinese) [3]Shiguo Sun,Meifeng Cai, Sijing Wang.Chinese Journal of Geotechnical Engineering, (2000),p.139.

Research on a transmission error-testing system of harmonic drive based on LabVIEW Jiancheng Gao a, Hongbing Xinb, Dengqi Cui c, Long Liu d, Yuefei Xin e, Tan Wang f Material and Mechanical Engineering School, Beijing Technology and Business University, Beijing100048, China agaojch@sina.cn, bxinhb@btbu.edu.cn, ccdq1984@163.com, dLiul1@126.com, email@xinyuefei.com, fwangtan56@yahoo.com.cn Keywords: Harmonic drive;Transmission error;Test system.
Acknowledgements This work was financially supported by the Key Project of the Science and Technology Plan Project of Beijing Municipal Education Commission(Grant Number:KZ201210011012).
Xin: Journal of Beijing Institute of Light Industry, 1999, 17(1):30-35
Xin: Journal of Beijing Technology and Business University (Natural Science Edition), 2002, 20(1)49-53