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Introduction Aluminum alloys are the prime structural material used in aircraft industry.
The starting materials are 99.999% pure Al, 99.99% pure Zn and 99% pure Ca supplied by Alfa-Aesar.
Morris, A new superplastic aluminum sheet alloy, Material Science and Engineering, Vol. 43, Issue 1 1980, pp. 85-92
Dengyun, Microstructure and mechanical properties of Mg–Al based alloy with calcium and rare earth additions, Materials Science and Engineering, Vol. 356, Issue 1-7, 2003, pp 1-7
Terasaki, Crystal structures and phase stability in pseudobinary CaAl2-xZnx, Journal of Solid State Chemistry, Vol. 179, Issue 8, 2006, pp. 2690–2697

Study on optimal circulation dynamic system and feasibility analysis for a solar biogas digester You Zhanga, Changsheng Pengb,* and Fengmin Lic The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China azhangyou417@163.com, bcspeng@ouc.edu.cn, clfm01@ouc.edu.cn * Corresponding author.
During the biogas production, fermenting materials will be transformed into biogas manure, which is a new way for harmless and resourceful realization.
Materials and methods Experimental working ambient.
Due to the biogas digester using the same fermenting materials and the microorganism living in the same growth environment, the biological heat of anaerobic fermentation was the same.
Xu: Agricultural Mechanization Research, Vol. 32 (2010), p. 170-172 [3] Lei Wu: Journal of Gansu Science, Vol. 21 (2009), p. 146-149 [4] A.P.

Investigating the use of nanoscale bilayers assembly on stainless steel plate to improve evaporation Shen-Chun Wu1, a, Dawn Wang2, b, Hsih-Shing Li1, c, Sin-Jie Lin1, d, Chao-Tsai Hsu1, e, Yau-Ming Chen3, f 1 Department of Aviation Mechanical Engineering, China University of Science and Technology, Taipei City, Taiwan, R.O.C. 2 Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ, U.S.A. 3 Department of Mechanical Engineering, National Taiwan University, Taipei City, Taiwan, R.O.C.
Acknowledgements The authors would like to thank the National Science Council of the Republic of China, Taiwan, for financially supporting this research under Contract No.
[3] Mitzi, D.B., "Thin-film deposition of organic-inorganic hybrid materials," Chemistry of Materials, Vol. 13, pp. 3283-3298, 2001
Journal.
Advanced Materials Research, Vol. 750, pp. 2104-2107, 2013.

Fabrication of Arrays of Zinc Oxide Micro/Nano Pillars in Aqueous Solution under an External Electric Current Gangqiang Yang1, 2, 3, a, Xiaoping Zou1, 2, 3, b, Xiangmin Meng3, Gongqing Teng1,2 Corresponding to Xiaoping Zou (xpzou2005@gmail.com) 1 Research Center for Sensor Technology, Beijing Key Laboratory for Sensor, Beijing Information Science and Technology University, Jianxiangqiao Campus, Beijing 100101, China 2 Ministry-of-Education Key Laboratory for Modern Measurement and Control Technology, Beijing 100101, China 3 Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TIPC, CAS, Beijing 100080, China a yanggangqiang08@gmail.com, bxpzou2005@gmail.com Keywords: ZnO; nanopillars; solution route; external electric current Abstract.
Among these methods, solution chemical route has become a promising option for large-scale production of 1D nano-/microscale materials due to its simple, fast, and less expensive advantages [6].
KF200907, the Program of Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TIPC, CAS and the Scientific Creative Platform Foundation of Beijing Municipal Commission of Education under Grant No.
Science Vol. 271 (1996), p. 933 [2] Y.
Guo: Journal of Crystal Growth Vol. 299 (2007), p. 184

In addition, the material properties in the modal analysis must be linear, isotropic, so such linear features as elastic modulus and density of a material must be specified, and the nonlinear material properties must be neglected.
(3) Definition of material properties: the material properties of each part of ball screws linear guide feed unit are as follows: elastic modulus, Poisson's ratio, density, material damping
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51205235) , the National Natural Science Foundation of China (51075246) and "High-end CNC machine tools and equipment manufacturing base" the National Key Scientific and Technological Project of China(2012 ZX04002013) .
Chinese Journal of mechanical engineering, 2010, 46(1), pp.92-99.

In the literature of material science we are not aware of the synthesis and characterization of SAP with polyacrylic acid/XG/bentonite where the entire polymerization process was carried out in a complete aqueous environment.Therefore, we paid attention to the synthesis and characterization of polymeric superabsorbents by introducing XG and bentonite in polyacrylic acid solution through chemical crosslinking by a polymerization technique using N,N’-methylenebisacrylamide as a crosslinker and ammonium persulfate as an initiator in a complete aqueous environment.
Materials and Methods Synthesis of Polyacrylic Acid/XG/ Bentonite superabsorbent Polymer Acrylic acid (AA, analytical grade) was commercially purchased from Dongfang Chemical Plant, Beijing, China.
The dried material was pulverized into particles and screened through a 200-mesh screen.
Acknowledgements This project was supported by the Nature Science Fundation of Hebei Province, China (# D2007000695).
[J] International Journal of Polymeric Materials, 60:1015-1025

Filter material is the core part of biofilter[1]~[3].
The material of filter is stainless steel.
Filter material is zeolite.
Filter material is quartz sand + activated carbon.
Filter material is zeolite + activated carbon.

Kim, Continuous Casting and Rolling for Aluminum Alloy Wire and Rod, Materials Science Forum, 638-642(2010)255-260
Jabłoński, Effect of Iron Addition to Aluminium on the Structure and Properties of Wires Used for Electrical Purposes, Materials Science Forum, 690(2011)459-462
Gold, Solidification Conditions and Microstructure in Continuously Cast Aluminum, Journal of Metals, 34(1982)28–34
[10] Toshio Haga, Kohei Tuchitani, Hisaki Warari, Shinichi Nishida, Casting of Bar Using a Twin Wheel Caster, Key Engineering Materials, 831(2020)46-51.

Jones, A General Theory for Elastically Constrained Ball and Roller Bearings under Arbitrary Load and Speed Conditions, ASME Journal of Basic Engineering. (1960) 309-320
Lazovic, Load distribution between rolling elements of deep groove ball bearings, Journal of Mechanical Engineering, 3 (2000) 14-17
Guillot, Calculation of the Stiffness Matrix of Angular Contact Ball Bearings by Using the Analytical Approach, ASME Journal of Mechanical Design. 122(1) (2000) 83-90
Tomović, Calculation of the necessary level of external radial load for inner ring support on q rolling elements in a radial bearing with internal radial clearance, International Journal of Mechanical Science. 60 (2012) 23-33
Miltenović, Vibration response of rigid rotor in unloaded rolling element bearing, International Journal of Mechanical Sciences. 52(9) (2010) 1176-1185

Construction project risk management is science and art for project management team on risk identification, assessment, response and monitoring, with a minimum price, to the maximum extent, to achieve the project objectives.
of total order C-A C1 0.109 0.038 C2 0.321 0.112 C3 0.570 0.199 C4 0.8 0.208 C5 0.2 0.052 C6 0.605 0.074 C7 0.103 0.013 C8 0.291 0.036 C9 0.857 0.147 C10 0.143 0.025 C11 0.529 0.035 C12 0.162 0.011 C13 0.309 0.021 C14 0.121 0.003 C15 0.344 0.009 0.535 0.015 Fuzzy comprehensive evaluation of risk rating and scoring the risks of Sports Centre project in Weifang City were rated and scored through hiring 10 peer, the results of an evaluation form the membership matrix, as shown in Table 2 Table 2 Membership matrix first-class risk factors second-class risk factors single factor fuzzy judgment factor weight factor symbol weight symbol technical risk 0.35 technical difficulty technology maturity technical reliability and goodness of fit 0.109 0.321 0.570 R1 0.1 0.2 0.3 0.3 0.1 0.1 0.2 0.3 0.3 0.1 0.0 0.1 0.3 0.4 0.2 quality risk 0.26 human factors quality of raw materials
References [1] Hai Chao Ding Dongguan Science and Technology Museum project risk management[D]. master thesis of Huazhong university of science and technology,（2006），In Chinese [2] Hongtao Jiao.
Hang Fung Yuen building of engineering science and technology security risk management[D]. master's degree thesis of Beijing university of posts , （2007） ，In Chinese [3] Jianmin Teng. risk management theory and its Application to construction project in Yantai city[D]. master thesis of Huazhong university of science and technology,（2006）， In Chinese [4] Chapman C.B.Cooper, D.F.
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