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Bronze-steel was selected as friction pair material between worm wheel and worm, so equivalent friction angle φν was 5.71o~10.20o.
Aluminum alloy whose elastic modulus E was 69GPa, poisson ratio μ was 0.31 and density ρ was 2800kg/m3 was selected as the material of adjusting mechanism.
Because the breaking point of the material σb was 85MP, the mechanism fulfilled stress condition.
Acknowledgements The authors would like to thank the financial supports of Anhui Provincial Education Department Natural Science Foundation (Grant No.
Synchronization Optimum Design of Single-crank and Double-rockers Mechanism [J].JOURNAL OF MECHANICAL ENGINEERING, 2010, 46(7):22-26.

The material consists of several phases.
The presence of precipitate phases embedded in the matrix makes it a heterogeneous material.
The relation between F and the mass fraction P can be obtained considering an elementary domain of material of mass δm.
[13] Goto S., Nomaki K., Koda S., Internal Oxidation of Nickel Alloys Containing a Small Amount of Chromium, Journal of the Japan Institute of Metals, vol. 31, pp. 600-606, (1967)
[15] Alcock C.B., Brown P.B., Physicochemical Factors in the Dissolution of Thoria in Solid Nickel, Metal Science, vol. 3, 1, pp. 116-120, (1969)

Bu China University of Geo-sciences Beijing 100083 China bucg@cugb.edu.cn Keywords: Tri-cone bit; Radial clearance; Contact stress; Roller bearing; Life Prediction Abstract.
Generally speaking, the structure and size are close, the materials and working environment are similar between two brands of tri-cone bit.
In order to optimize design of tri-cone bit, the materials, and heat treatment of the roller bearing anti-friction pair should be taken into consideration besides the radial clearance of assembling bit.
Vol. 54(2) (1998), p.18 [8] Henry Krzeminski-Freda, Bogdan Warda: Wear, 192(1996), p. 29 [9] Yangang Wei, Yi Qin, Raj Balendra, Qingyu Jiang: J. of Materials Processing Technology Vol. 145(2004), p. 233 [10] Editor Committee on Mechanical Engineering Manual: Mechanical Engineering Manual, Vol.5, (China Machine Press, Beijing, 1982) [11] Qunyi Jia: Design and Application of Anti-friction Bearing (The Northwest China Polytechnic University Press, Xi'an, 1991) [12] Yan Huang: Engineering Elastic Mechanics (Tsinghua University Press, Beijing, 1982) [13] Changgen Bu, C.B.
Wang: Chinese Journal of mechanical engineering Vol. 37(2001), p. 26

Material properties were defined with reference to some preliminary compression tests performed on thin leaf masonry specimens (Giuriani et al. 2007) and to the values proposed by Lofti & Shing 1994 and Lourenço 1994.
Material properties are summarized in Fig. 5a.
The unrealistic plateau of the curves at the mechanism onset follows the assumption of perfectly plastic behavior of the material in compression.
"The science of structural engineering."
Journal of Structural Engineering, 120(1), ASCE

Substitution of Biomass for Coal and Coke in Ironmaking Process Zhengwen Hu1, a, Jianliang Zhang1, b, Haibin Zuo1, c, Mi Tian2, d, Zhengjian Liu1, e, Tianjun Yang1, f 1School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2 No. 4 Steelmaking Plant of Wuhan Iron and Steel Group Corporation, China ahuzhengwen1986@163.com, bjl.zhang@metall.ustb.edu.cn, czuohaibin@ustb.edu.cn, dtianmi2010@126.com, eliuzhengjian@126.com, fyangtj@ustb.edu.cn, Keywords: Biomass, biochar, ironmaking, replacement for coal and coke, low carbon Abstract: Biomass is renewable and carbon neutral.
Furthermore, metallurgical coke, one of indispensable raw materials for blast furnace, is in increasing shortage and coking process causes serious pollution.
Biomass, referring to all living matters on the earth, is a general term for organic materials derived from plants such as grasses, crops, trees, etc.
It was therefore one of the biomass materials that could directly replace conventional coke for large blast furnaces.
The Chinese Journal of Process Engineering, Vol. 9 (2009), In Chinese

The basic infrastructure contains soil base, pavement elevation, grade of slope, shape, paving and materials, which determine the basic content of sidewalks (refer to theCode for Design on Accessibility of Urban Roads and Buildings.
Similarly, worse design of slope and inappropriate choice of shape and materials will also bring people about some trouble unnecessarily.
Here we assign the part without damage shares the proportion of the total to Gs); Gd——Reasonable pavement degree(It shows the degree of reasonableness and non-defectivenessthat materials and pavements achieved.
Harbin Institute of Technology, 2010 [5]Urban Planning and Design Standards for Public Toilets, edited by Beijing Institute of Environmental Health and Science (1988), in press
[7]LieqiangXiong, JieLi: Journal of Tongji University.2005.8253-374 X (2005): 08-1065-04.

Analysis of aluminum supply and demand development trend in China and the United States Xin Li1, a, Xiang Zhang1,b 1 College of Management Science, Chengdu University of Technology; Chengdu Sichuan, China alixin2012@cdut.cn, b64549017@qq.com Keywords: aluminum supply and demand, invert ”U” curve, primary aluminum production, secondary aluminum production.
Introduction Aluminum is a widely used fundamental material and is imperative for industrial and economic development.
The above implies that for many secondary materials an essentially global industry has developed on the basis of profit incentives, and prices are determined by demand and supply in these markets[4].
Secondary aluminum raw materials mainly rely on imports, which makes China's aluminum industry external dependency is very high, and by the rapid development of recent 20 years, significantly increased the social stock of China's aluminum, Chinese imports aluminum scrap began to slowly reducing , aluminum scrap self-sufficiency ability raise.
[7] XU Guo-dong, AO Hong3, SHE Yuan-guan1.Current status and development trend of aluminum industry in world and strategy suggestions in China under background of sustainable development, The Chinese Journal of Nonferrous Metals,2012;07:20-12.In Chinese.

One possible solution is to use seawater instead of tap water in cement-based materials.
Materials and Methods Materials used In this study, the Portland cement used for preparing the mortar mixes complies with the EN 197-1 standard [32].
Matalkah, Potential use of Jordanian volcanic tuffs as supplementary cementitious materials, Case.
Asadi, An influence of pozzolanic materials with hybrid fibers on structural performance of concrete: A review. 
Materials Today: Proceedings. 43 (2021), 1956-1959

The Study about the Integrated Development and Utilization of Above and Below Urban Ground Space in China Zhilong Chen 1,a, Cheng Zhang 2,b, Dongjun Guo 3,c 1PLA university of science and technology, Nanjing, Jiangsu 210007,China 2PLA university of science and technology, Nanjing, Jiangsu 210007,China 3PLA university of science and technology, Nanjing, Jiangsu 210007,China achen-zl@vip.163.com, b20399832@QQ.com, cguo_dongjun@163.com Keywords: Ground space, Underground space, Integration, Development, Utilization.
Therefore, this part of the underground space has the highest use value, easily to develop, and it is also the most comfortable part to people both in material and psychological.
Acknowledgement It is a project supported by the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (No.51021001).
[4] Sun Hui, Research on Development and Use of Urban Underground Space in Wuhan, Huazhong University of Science and Technology, Wu Han, 2005
[9] Fang Yong，City Center Design of Underground Space Integration，Sichuan Constuction，2008 [10] Xia Zhengwei, Extension and Development of City’s Vitality Space, Journal of Changzhou Institute of Technology, 2009

In light of this, the issue of finding systems and materials for a compact and efficient hydrogen storage assumes a primary importance.
(Ref. [53] in [10]) reported very low hydrogen storage capacity at 303 K, and concluded that GNFs were unlikely storage materials for hydrogen.
Gary Sandrock, a well known expert in the field of hydrogen storage materials, to publically call on Rodriguez to submit samples to others for a “Real-Word Test” of their nanofiber materials (Ref. [56] in [10]).
Baker, Encyclopedia of Materials: Science and Technology, Elsevier, Amsterdam 2005
Srivastava, New carbon variants: graphitic nanofibers (nano-springs, nano-shoeckers) as hydrogen storage materials, Int.