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Compared to monocrystalline silicon, multicrystalline silicon has more structure defects and impurities which reduce the performance of the material.
Acknowledgements Financial supports of this work from the National Natural Science Foundation of China (U1137601), Yunnan Provincial Natural Science Foundation (2012FB125) and key project of Chinese Ministry of Education (212159) were gratefully acknowledged.
Knack: Materials Science in Semiconductor processing, Vol. 7 (2004) No.3, p.125
,Vol. 7 (1994) No.1, p.60 [6] A A Istratov, C Flink and H Hieslmair: Materials Science and Engeering B, Vol. 72 (2000) No.2-3, p.99
Weber: Journal of Electrochemical Society, Vol. 149 (2002) No.1, p.G21

The fatigue test has been done in reference to “Standard test methods for fiber reinforced concrete” (CECS 13:2009) .Test is done on the MTS810 material testing machine in the United States, using a common form of four-point bending with the contact mode of load and beam for the line contact, data acquisition using the DH5937 dynamic strain indicator.
In other words, it can make the fatigue life better to mix glass fiber in concrete beam Acknowledgements This work was financially supported by the Natural Science Foundation of Yunnan Province (2007A0015Z).
Journal of South China University of Technology (Natural Science Edition,2004,32(10):71-75 [3] Cheng Yi, Heping Xie, Huafei Sun.
Steel fiber concrete fatigue fracture performance and Engineering[M].Beijing:Science Press,2003(in Chinese) [4] Jingzhao Shi, Xingzhao Yang, Xinchang Chen.
Journal of Henan Agricultural University, 2009,43(4):405-409(in Chinese)

The objective of the problem is to minimize the total cost of the material, forming and welding of a cylindrical vessel.
Acknowledment The research is sponsored by Guangdong Science and Technology Project( 2010A040307001), Guangdong Science and Technology Project( 2009A01160400), Guangzhou Science and Technology Project(2009Z2-D501), Dongguan Science and Technology Project(200910810208).
Li, etc., “Optimization of double universal coupling using competitive algorithms,” Journal of Gongdong Non-Ferrous Metals, vol. 1, pp.221–223, 2007
Deb, “Optimal design of a welded beam via genetic algorithms,” AIAA journal, vol.29, no.11, pp.2013-2015, 1991

Introduction Wide band gap of zinc oxide (ZnO) thin film has very good electrical and optical properties, as an excellent transparent electroconductive film material [1-3].
Acknowledgment The work is financially supported by the Natural Science Foundation of Chang Zhou Institute of Technology (YN1105), the Science and Technique Foundation of Chang Zhou (CJ20120001), Natural Science Research Project of University in Jiangsu Province (12KJD510001) and National Natural Science Foundation of China (11247323).
Journal of Applied Physics, 105(2009) 114504 [11] Shah J.
Journal of Applied Physics, 94(2003)2627

Study on TBM Cutterhead Working Principle Heping LIU Dep. of Mechanical and Electrical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China liuheping2001@sina.com Keywords: TBM, Cutterhead, Disc cutter, Modeling, Rock-breaking.
Working principle of cutterhead Rock is a nonhomogeneous and nonlinear material.
Acknowledgements The financial support by The Special Funds for Major State Basic Research Project under Grant no. 2010CB736008 and Doctor Research Start-up Project of Luoyang Institute of Science and Technology 2009BZ14 are gratefully acknowledged.
International Journal of Rock Mechanics and Mining Sciences. 1975,12 (12)：p7-20
International Journal of Rock Mechanics & Mining Sciences, 2007, 44(2):p238-246.

Thermal design and thermal analysis of control cabinet forpattern sewing machine QibingLi1, 2, Yu Huang*, 1, 2, a 1College of Mechanical Science and Engineering, Huazhong Universityof Science and Technology, Wuhan 430074, China 2State Key Laboratory of Digital Manufacturing Equipment and Technology ayuhuang_hust@163.com Key words:pattern sewing machine; control cabinet; thermal design; thermal analysis; optimization design.
Table 1 Parameters of components models Component name Housing material Thermal loss/W Allowabletemperature/oC Servo driver 1 Aluminum 147 80 Servo driver 2 Aluminum 147 80 Servo driver 3 Aluminum 147 80 Servo driver 4 Aluminum 72 80 Servo driver 5 Aluminum 72 80 Servo driver 6 Aluminum 40 80 Stepping driver Aluminum 21 65 Power supply 1 Low-carbon steel 25.4 50 Power supply 2 Low-carbon steel 3.7 50 Control card Low-carbon steel 15 60 In the thermal analysis software, building cabinet model, adding boundary conditions, solver calculating, post-processing, were performed in sequence.
Xi’an, School of Computer Science of Northwestern Polytechnical University, 2005
Microelectronics Journal, 2003, 34, P. 223-230
Journal of Air Force Engineering University. 2005, 6(2), p. 62-65

Two ways can be followed in order to obtain an environmentally sustainable development on this subject: the degradation and the use of this material as starting material for the synthesis of new ones.
Fig. 1 Aromatic aldehydes derived from lignin building units The classic Fenton reaction has been applied in the treatment of highly loaded industrial wastewater, utilization of landfill leachate, degradation of pesticides, herbicides and pretreatment of sludge, its application to degradation of plant materials has been limited.
Materials The corn cob was from Shandong province, china.
The main compositon of corn cob material and residue from pretreatment steps were shown in Table 2.
[6] L.I.Tolosa,A.J.Rodríguez-Malaver,A.M.González,O.J.Rojas,Effect of Fenton’s reagent on O/W emulsions stabilized by black liquor,J.Journal of Colloid and Interface Science.294(2006)182-186

These emissions may be strongly influenced by the raw materials and manufacturing techniques of the recycled PET.
Introduction Polyethylene terephthalate (PET) enjoys wide applications in textile, package materials by virtue of its excellent wear, chemical resistance, durability and mechanical properties coupled with its low market price.
One of the attractive chemical recycling methods to regenerate PET is glycolysis reaction into the bis(2-hydroxyethyl) terephthalate, and then obtained monomer BHET is used in the synthesis of polymeric materials[4].
Experiments Materials.
Journal of Polymer Science, 2017 1-13.

Beijing: China Science Press. 2001
ASCE, Journal of Structural Engineering, 2002, 128 (1):96-104 [3] ABDEL WAHAB M M.
Journal of Sound and Vibration, 1999, 226 (2):217-235 [4] LI Y Y, CHENG L., YAM L H and WONG W O.
Journal of EM, ASCE, 2000, 126(7): 677-683 [6] OVANESOVA A V, SUÁREZ L E.
Journal of Vibration and Shock, 2008, 27(5):44-47

Cracks present a serious threat to the performance of rotating structures since most of the structural failures are due to material fatigue.
International Journal of Solids and Structures.
International Journal of Mechanical Science.
Journal of Aerospace Engineering.
International Journal of Mechanical Engineering Vol. 1 (2011), p 26-34.