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At the node N4 , the bucket is full and begins to lift the media; at the node N5, the bucket and the soil material in it move upward with the same velocity, leaving two streams of soil flowing down.
Acknowledgements This work is supported by the Science and Technology Project of Wuhan Science and Technology Bureau under grant number # 201271130442 and by the Fundamental Research Funds for the Central Universities of Wuhan University under grant number # 201120802020002.
Cundall: International Journal of Rock Mechanics, Mineral Sciences and Geomechanics Vol. 25 (1988), p. 47-65
Favier: International Journal for Numerical Methods in Engineering Vol. 51 (2001a), p. 1407-1421
Favier: International Journal for Numerical Methods in Engineering Vol. 51 (2001b), p. 1423-1436

Nowadays, atmospheric pollutants diffusion studies encounter a difficulty that the access to data is less.It is suitable to choose the gray system theory to construct predictive model .And the cause of PM2.5 is relatively complex, the research suggests, AQI monitoring indexes of sulfur dioxide (SO2), nitrogen dioxide (NO2), nitric oxide (NO) is formed under certain conditions of PM2.5 in front of the main gas material.
References [1]LIU Chang wei.The mathematical model study of polluting fountain diffusion concentration in air pollution.Journal of Baotou University of Iron and Steel Technology ,2002(04):376-379 [2]Mayila Mushajang.Research of Desertifi cation on the Predicting Model.XinjiaIlg Agricultural Sciences.12，49(5)：968—973 [3]Shi Dongwei.
Journal of Henan Institute of Science and Technology. 2012(4):55-58 [4]DENGJin一hua.Matlab applied in analysis of dispersion of chemical dangerous gases.
Journal of Safety Science and Technology. 2005(10):94-96

Material models are used as follow, yield strength (fy) is 385.5MPa，elastic modulus(E) is 2.06×105Mpa, Poisson ratio (v) is 0.3.
Acknowledgements This work described in this paper was supported by National Science Found of China (51008200), Program for Liaoning Excellent Talents in University (LJQ2011059) and Science and Technology Program of Shenyang (F12-277-1-31).
References [1] S.Narayanan, M.Mahendran: Journal of Constructional Steel Research, Vol.59 (2003) No.4, p.489 [2] C.D.Moen, B.W.Schafer: Thin-Walled Structures, Vol. 46 (2008) No. 10, p.1164 [3] C.D.Moen, B.W.Schafer: Journal of Structural Engineering, ASCE, Vol. 137 (2010) No. 5, p.559 [4] Y.H Yao, Z.Y Wu, B.
Cheng, J.B Deng: Journal of South China University of Technology, Vol. 39 (2011) No. 9, p.61 (In Chinese) [5] R.
(Science Press, Beijing 1989) (In Chinese) [6] C.G Wang: Stability behavior analysis and experimental study on singly-symmetric cold-formed thin-walled steel members under compression loading.

Specifications of the helical gear pairs Gear pairs GP1 GP2 GP3 GP4 Addendum modification coefficient, 0.74 1.1 0.74 1.1 Addendum modification coefficient, 0.05 -0.31 0.05 -0.31 Face width, 28 28 38 38 Transverse contact ratio, 0.89 0.68 0.89 0.68 Overlap ratio, 1.02 1.02 1.38 1.38 Total contact ratio, 1.91 1.70 2.27 2.06 Average mesh stiffness, [ 247.1 148.8 274.1 160.2 Material steel/steel steel/steel steel/steel steel/steel A computer program was developed for simulating the dynamic characteristics of helical gear pairs.
Tsay, Tooth Profile Design for the Manufacture of Helical Gear Sets with Small Number of Teeth, International Journal of Machine Tools and Manufacture, 45 (2005) 1531–1541
Evaluation of Engagement Accuracy by Dynamic Transmission Error of Helical Gears, The 3-th European Conference on Mechanism Science Eucomes 2010, Mechanisms and Machine Science, Vol.5, New Trends in Mechanism Science, Springer Publishing House, (2010) 421-428
Journal of Mechanical Design, Transactions of the ASME, Vol. 30 (2008) 052603/1-9
Journal of Tribology, 126 (3) (2004) 597-604.

The standard test method of using the BM II is published by the American Society for Testing and Materials (ASTM) [10].
Journal of Safety Research 14, 145-158 (1983)
Vaynor (ed.), International Series of Monographs on Material Science and Technology, vol. 9: Oxford: Pergamon Press (1972)
[10] American Society for Testing and Materials, F-1677-05.
West Conshohochen, PA, American Society for Testing and Materials (2005)

Highly Transparent Y-α-sialon by Hot Pressing Ying-Chun Shan1,a, Hui Ye1,b, Jiu-Jun Xu1,c, Jiang-Tao Li 2,d,* 1Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China 2Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China ashanychun@126.com, byehui_dmu@163.com, cjjxu@dlmu.edu.cn, dljt0012@vip.sina.com Keywords: sialon; optical transparency; microstructure Abstract.
In recent years, studies on optical properties of sialon ceramics primarily concerned the α-sialon material.
Chen: Journal of Materials Science Vol. 39 (2004), p. 6257 [8] X.L.
Cheng, D.S Yan: Materials Letters Vol. 58 (2004), P. 1985 [9] Y.
Zhang, in: Materials Science and Engineering, A (2008), in press [10] G.R.

It is expected that best surface roughness can be obtained by selecting the appropriate cutting speed and feed rate for the material pair of workpiece and cutting tool.
Test conditions are as follows: Wheel Type: Corundum; Workpiece material: 45 steel; Cutting Fluid: emulsion.
Guo, Taguchi Method Based Process Space for Optimal Surface Topography by Finish Hard Milling, Journal of Manufacturing Science and Engineering 2009, Vol. 131 [5] Marko Sedlaček, Bojan Podgornik, Modeling of surface topography for reduced friction, Proceedings of the 9th Biennial ASME Conference on Engineering Systems Design and Analysis, July 7-9, 2008, Haifa, Israel [6] Tyler L.
Pfefferkorn , Examination of Selective Pulsed Laser Micropolishing on Microfabricated Nickel Samples Using Spatial Frequency Analysis, Journal of Manufacturing Science and Engineering APRIL 2009, Vol. 131 [7] Waikar, R.

Introduction With rapid development of transportation industry, application of high-strength materials on highways and urban roads is making bridges lighter, thinner and longer.
As a result, the compacted material will generate alternate shear strain.
This can eliminate interspaces among material particles and realize compaction for materials at both horizontal and vertical directions.
Thus it will promote units or other compacted materials to be destroyed, so as to reach the purpose of compaction.
Chinese Journal of Construction Machinery, 2005.1 [3] YANG Donglai.

I, Tokyo University of Science, Niijyuku, Kastushika-ku, Tokyo 125-8585, Japan amarai@rs.tus.ac.jp Keywords: Indentation test, Interfacial Fracture Toughness, Thermal Barrier Coatings, Test Standardization.
Fig.1 Schematic illustration of indentation test Fig.2 Schematic illustration of analysis mode Introduction There are some test methods to evaluate adhesive strength of the interface where two different materials are joined.
Young’s modulus are 69.2[GPa] and 2.15[GPa] which corresponds to material combination of aluminum alloy/PMMA.
Both materials were machined in the geometry as shown in Fig.5 and blued by quick-drying glue.
C.Sih,”Plane Problems of Cracks in Dissimilar Media”, Journal of Applied Mechanics, (1965), pp.418-423

Experiments Materials.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (Grant No. 51108374) and the Special Fund for the committee of science and technology of Ningbo transportation (Grant No. 201311).
Synthetic Materials Aging and Application.2009,Vol.38,No.1 [2] CHEN Jingyun,QIU Longliang.
Journal of Shenyang Jianzhu University(Natural Science).2012,Vol.28,No.5 [3] ZHANG Zheng-qi,LI Ping,WANG Bing-gang.
Journal of mate-rials in civil engineering, 1999