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Chengkang Gao of Northeastern University (2012), Pointed out that raw materials manufacturing and operation maintenance was the most environment load in the process of large wind turbines [8].The representative research of the third stage, Weiguang Zhu of Northeastern University (2010), calculated a single wind turbine energy repayment time was 7 month [9].
Xiaotian Wang of Xian University Science and Technology (2012), Calculated a wind farm operations energy repayment time was 8 month [10].
Journal of engineering and technology. 2009.
Journal of northeastern university (natural science edition), 2012.7.
Journal of xi 'an polytechnic university. 2012.

Cristofari[6] analyzed the performances of a solar flat-plate thermal collector wholly manufactured in a copolymer material.
The results show that with high degree of stratification saving energy is higher than fully mixed tank and using polymer materials reduces the collector weight by 50% compared to a traditional metal collector.
Louche: International Journal of Thermal Sciences.
[7] Yaohua Zhao, Feilong Zou and Yanhua Diao: Journal of Engineering Thermophysics.Vol.31 (12) (2010), p.2061-2064, In Chinese
[8] Yaohua Zhao, Hongyan Wang, Yanhua Diao, Xinyue Wang and Yuechao Deng: CIESC Journal.

Each project environmental impact assessment must be conducted to strict control from the perspective of ecological services of size, quantity, color, material, shape and style, advocating is given priority to with natural landscape, local materials, in accordance with this scene, reflect the beauty of nature, for those high input, high consumption, high pollution projects resolutely put a stop to stimulate economic growth.
It is an entirely new way of economic growth, to realize the effective utilization of material and the sustainable development of economy and ecology.
Journal of kunming university. 2007 (02) [2] QingZhong Ming.
Journal of yunnan normal university (philosophy and social sciences edition), 2006 (05) [3] Guojiang Sun.
Journal of qinghai and the social sciences. 2005 (01)

So we take the aluminium alloy LY12 as the material of the main body frame and the propulsion mechanism.
Chinese Journal of Mechanical Engineering, vol. 41, no. 8, 2005, pp: 3-17.
Journal of Disaster Prevention and Mitigation Engineering, vol. 27, no. 1, 2007, pp: 112-117.
Advanced Materials Research, Vol. 211-212, 2011, pp: 454-459
ASME Journal of Mechanical Design, vol. 115, 1993, pp: 223–230

Consequently, it is quite important to study the tearing mechanical properties of envelope material including the initial crack [2].
Acknowledgements This work was financially supported by the Aeronautical Science Foundation of China (Grant No. 2012ZA51009).
References [1] Yao Wei，LI Yong，Wang Wenjun: SPACECRAFT ENGINEERING Vol. 17 (2008), p. 69 (In Chinese) [2] XU Bin, YAN Yinbiao: Materials Review Vol. 26 (2012), p. 124.
[6] Kim S C, Kim J S, Yoon H J: International Journal of Precision Engineering and Manufacturing Vol. 12 (2011), p. 321
[10] Wang Liming, Gao Chuanping: Journal of Qingdao University Vol. 16 (2001), p.29.

To fabricate fine spherical iron-based composite powders with carried alumina abrasives by plasma spraying, the following powder spraying methods were carried out: (1) simultaneous spray method - spraying each raw material simultaneously from respective main and side nozzles, (2) direct spray method - spraying of mechanically mixed raw materials from main nozzle.
Kurobe: Journal of the Japan Society for Abrasive Technology, Vol. 69 (2002), p. 79
Yamaguchi: JSME International Journal Series C, Vol. 38 (1995), p. 798
Kondo: Journal of the Japan Society for Abrasive Technology, Vol. 45 (2001), p. 46
Shinmura: Key Engineering Materials, Vol. 291-292 (2005), p. 287.

Journal of Electronic Materials, 38, No. 12(2009) [5] Li, G. et al.
[9] Tsukimura, M. et al, (2002) Materials Transactions.
Vol 30, no.4 [11] Yoon, J.W., Noh, B.I. and Jung, S.B. (2011) Journal of Electronic Materials [12] Huang, Z.F., Conway, P.P, Jung, E., Thomson, R.C, Liu, C.Q, and Loeher T.
Journal of Electronic Materials,. 35(9) ( 2006), pp 1761-1772
Materials Science and Engineering, 68, 1–38 [15] Choi, W. (2002).

Cement using local materials Mudanjiang PC.32.5 cement.
According to the grouting layer -305m ~-475m with the largest grouting materials, we can get the diagram below which has shown the amount of grouting material used in each layer and the location or orientation of grouting holes with their record during the process.
Journal of Shandong University of Science and Technology,2005,24(1):46-48
Research status and development direction of grouting theory[J].Journal of Rock Mechanics and Engineering,2001,26(6):839-841
[9]He Zhe,Wang Jie-qiang,Liu Bin.Theoretical study of osmotic grouting in rock mass[J].Journal of Rock Mechanics and Engineering,2001,20(4):492-496.

Properties Of Aluminum And Copper Materials Used In Experiments Material Aluminum Copper Chemical Composition Commercial Purity Commercial Purity Tensile Strength 170 MPa 360 MPa Surface Roughness (Ra) = 0.30μm (Ra) = 0.30μm This deformation depends on metal–metal pairs, joining shape and thickness and surface preparation.
Experimental Material.
The properties of aluminum and copper materials used in experiments are given in table 1.
Journal of Engineering for Industry, May 1979, Vol. 101, pp.121-127
Materials Science and Technology, April 1989, Vol. 5, pp.377-381

The boundary condition is defined so that the materials positioned in the right hand side of the paper are fixed and the materials suited in the left hand side of the paper are rotating.
The Johnson-Cook parameters for the materials used in this study are tabulated in Table 2.
In general, the strain-rate of the order 10 1 is observed for the friction welding of SS304 to mild steel materials (see Figure 6) compares to the strain-rate of the order 1 obtained for the friction welding of mild steel to mild steel materials.
Frost, Modeling the linear friction welding of titanium blocks, Journal of Material Science and Engineering A292 (2000) 8-17 [2] M.
Sahin, Simulation of friction welding using a developed computer program, Journal of Materials Processing Technology 153-154 (2004) 1011-1018 [3] R.G.