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Key Engineering Materials，Vol.259-260 (2004), p. 239 [2] B.
Key Engineering Materials，Vol.291-292(2005), p.45 [3] B.Zhao et al.
Key Engineering Materials，Vol.304-305(2005),p.171 [4] B.Zhao, Y.Chen, Y.Wu.
Henan Polytechnic University (Natural Science),Vol. 26(2007), p.233 [5] X.H.
Gao, Journal of Inorganic Materials，Vol.16(2001), p. 202

The expression of the contact stiffness is: (3) (4) (5) Where μ1, μ2 is respectively the Poisson’s ration of the materials of the two gears, E1, E2 is respectively the Young’s modulus of the materials of the two gears, R1, R2 is respectively the equivalent radius of the contact point of the two gears(“+” expresses outer teething, “-” expresses internal teething).
The material of the planet gears is 20CrMnTi of which Poisson’s ration is 0.28 and the Young’s modulus is 2.07×105Mpa.
Acknowledgement This paper is supported by National Nature Science Foundation (Grant No. 51465021), Yunnan Nature Science Foundation (Grant No. 2013FB014), Important Project of Yunnan Department of Education (Grant No. 2013Z124) and Research Foundation for Talented Scholars, Kunming University of Science and Technology (Grant No.
[3] Kiracofe D R, Parker R G, Structured Vibration Modes of General Compound Planetary Gear Systems, ASME Journal of Vibration and Acoustics, 2007, 129(1):1-16
[5] Zhengming Xiao, Zhihong Yin, Yu Guo.Dynamic Characteristics of Planetary Gears Train of Semi-direct Drive Wind Turbine[J].Applied Mechanics and Materials Vols. 271-272(2013), p.868-871.

Materials and Chemicals Materials Plant materials Mopan persimmons (Diospyros kaki L. cv.
Journal of Food Science 71(3): S293–298
Journal of Agriculture and Food Chemistry. 46:25-31
Journal of Food Science. 73(1): 24-28
Journal of Food Sciences and Nutrition. 56(2):105-113

Materials and Methods 1.1 the generality of the study region Lying in the southeast of Tianshui in Gansu province, in the northern piedmont of Qinling, on the intersection of Shanxi province, Gansu province and Sichuan province, Maiji is the east gate of Tianshui.
Journal of Natural Resources, 1999, 14(3): 206-211
Journal of Natural Resources, 1995, 10(1): 1-8
Chinese Journal of Applied Ecology.2008,19(5)：1058~1063
Journal of Desert Research,2002,22 (3):220-228

Among most important factors are the properties of sliding materials and lubricant, load/velocity input and contact geometry, but also dynamic characteristics of the machine (tester) which influenced the friction process.
Tests were carried out on various metallic materials with the use of an inertial tribometer in a flat – on – cylinder contact configuration.
ACKNOWLEDGEMENTS The financial support from the Polish Ministry for Science and Higher Education in the form of research grant No N N 504 411 437 is hereby gratefully acknowledged.
Of the ASME - Journal of Tribology, Vol. 106, pp. 59 - 64 [3] Aronov V., D’Souza A.F., Kalpakijan S., Shareef I., (1984) Interactions Among Friction, Wear, and System Stiffness - Part 2: Wear Model, Trans.
Of the ASME - Journal of Tribology, Vol. 106, pp. 65 – 69 [4] Czichos H., Becker S., Lexow J., (1987) Multilaboratory tribotesting: results from the Versailles Advanced Materials and Standards Programme on Wear Test Methods, Wear 144, pp.109-130 [5] Grudziński K., Konowalski K., Kostek R., (2000) Modelowanie kontaktu tarciowego w układzie dynamicznym, s.9 – 16 Proc. of the Int.

The level of soil samples’ redox potential depends on the relative concentration between the oxidation state material and reduction state material in soil sample liquid.
Acknowledgements This work was financially supported by zhejiang Natural Science Foundation (Y1100403) and technology innovation Team of Ningbo (2011B81005).
[M] Beijing Science Press, 2011 [2] X.
Journal of Air Force Engineering University, 2000, 1(3): 10-12
Gu, Corrosivity study of the marine sediments in Eastern Part of the Pearl River estuary, South China Sea[J], Journal of Tropical Oceanography, 1997, 16 (3): 90-98

An acceleration Sensor Placement Method Considering Network Life Cycle for Vibration Monitoring of Bridges Weidong Zhang1,a, Jun Wan1,b, Yibo Ai1,c and Bin Yang1,d,* 1National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing,100083, China azwd@ustb.edu.cn, b wanjun870727@126.com, cybai@ustb.edu.cn, dbinyang@ustb.edu.cn *Corresponding author Keywords: vibration monitoring; wireless sensor network; genetic algorithm; modal assurance criterion (MAC) Abstract.
The material of the bridge is reinforced concrete, and its elastic modulus, Poisson’s ratio, density.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51005014).
References [1] Kumar K R, Narayanan S: Smart Mater Struct, 2008，17：1-15 [2] Kammer D C: Journal of Guidance: Control and Dynamics, 1991, 14(2): 251-259 [3] Heylen W: Journal of Vibrations and Acoustics, 1990, 112, 468-472 [4] Udwadia F E: Journal of Engineering Mechanics, ASCE, 1994, 120(2):368-390 [5] Yu L C, Hsu C C: Mobile Networks and Applications, 2000, 3(5): 27-37 [6] Thomas G Carne, Clark R Dohmann.
NewYork: Union College, Schenectady, 1995, 927-933 [7] Guo H Y, Zhang L, Zhang LL, et al: Smart Materials and Structures, 2004, 13(3):528-534 [8] Pandey A K, Biswas M, Sanan M M: Sound and Vibration, 1991, 145(2): 321-332 [9] Srinivas M, Patnaik L M: IEEE Transactions on System, Man and Cyb-emetics, 1994, 24(4): 656-667 [10] S.

Materials and methods Materials.
In a word, the benzene-ethanol extractives of bamboo leaves could be used as raw materials of biomedicines.
Journal of Applied Polymer Science, Vol.18(2000), p.23-97, 2000 [2] M.
Zhu’e.Journal of Bamboo Research, 22(4)2003, p.7-13 [5] W.
Chinese Journal of Analytical Chemistry, Vol.35(2007), p.586-58

Experimental Section Materials and Reagents.
Influence of t-BuOH on the degradation efficiency of pCNB (T=296K; pH=6.86; [pCNB]=100μg/L; [pumice]=1.0g/L; [O3]=0.6mg/L; reaction time 20 min) As shown in Figure 1, the lowest degradation efficiency of pCNB appears with the use of the pumice materials in the absence of ozone, namely adsorption on pumice, resulting in the removal of only 3.9% of the initial pCNB after 20min.
Vol.10 (2009), p. 1221 [4] ZhenZhen Xu, ZhongLin Chen, Yue Ben.CIESC Journal.
Vol.60 (2009),p. 1687 (In Chinese) [5] Xu Zhai.Journal of natural science of Heilongjiang university.
Journal of Hazardous Materials .

Thus, at high temperatures, the removal of H2S by metal oxide material has attracted considerable attention [4].
The manganese oxide materials were prepared by precipitation method.
The crystal structure of the sorbent material was detected by a DX-2700 X-ray diffractometer.
Acknowledgements This work was supported by the National Natural Science Foundation of China (21276172/51272170) References [1] W.
Zhang, Formation of (FexMn2−x) O3 solid solution and high sulfur capacity properties of Mn-based/M41 sorbents for hot coal gas desulfurization, Journal of Hazardous Materials 248- 249 (2013) 81- 88