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Finite Element Model In order to ease the modeling and calculating, simplifying the drill string-bit system reasonably and making following assumption: 1, material characteristic of drill string is elastic, homogeneous and isotropic.2, neglecting the influence of drilling fluid and mud.3, the section of wellbore keeps circular and neglect the extension of wellbore.4, treating drill string and wellbore wall as one system.
Beam 188 ignores any real constant data and can receive properties such as density and damping in material properties section.
Chen: Journal of Petrochemical University, Vol. 24 (2011) No.4, p.55 [5] X.
Chen: Advanced Science Letters, Vol. 16 (2012) No.9, p.13 [6] W.
Rashed: Journal of Engineering and Applied Sciences, Vol. 6 (2011) No.1, p.64

Materials and methods The study site was located on the north slope of the Yinshan Mountain Range, Damao County, Baotou city, Inner Mongolia, north China (latitude 41°20′N and longitude 111°12′E, 1600 m in elevation).
Pratacultural Science, Vol. 78 (2000), p. 53–56
Chinese Journal of Applied Ecology, Vol. 9 (2004), p. 1662–1666
Pratacultural Science, Vol. 198 (2010), p. 42–46
Australian Journal of Expert and Agriculture, Vol. 5 (2003), p. 4861-4874.

On the other hand, both and have relationship with sectional dimension of and, and the material’s coefficient of thermal expansion.
At the same time, we should reduce material and the space it took; we need to make the volume parametersminimum.
Handbooks in operations research and management science [M].Amsterdam, Elsevier, 1989, 171-210
Beijing university of aeronautics journals，2006, 3（2）： 125-129.
Computational mechanics journals，1995,12（3）323-331.

Material database stores the data and feature of all parts such as contactor, reed, magnet, yoke, winding and shell.
The Organization, Expression, Management of Knowledge user interface Reasoning machine Explaining module Blackboard Analysis evaluation optimization Displaying and drawing Knowledge database Case database Knowledge acquiremen t Case acquirement Fields expert Management of case database Management of knowledge database Fig. 1 The structure of intelligent expert system Material database and its management The Organization and Expression of Knowledge.
Acknowledgement This work was supported by the National Natural Science Foundation (No. 60771069) and the Hebei Province Natural Science Foundation (No.
Chinese Journal of Mechanical Engineering Vol.37 No.2 (2001), p.8 [4] Li Lingling, Li Zhigang, Zhou Chunlai, et al,Control & Automation Vol.27 No.2 (2007), p.187 [5] Gao Zhaohui, Li Zhigang, Wang Jianna.
Journal of Computer Applications Vol.27 No.3 (2007) p.765

Experimental equipment and methods Experiment device and material Experiment is done on the laser heating test-bed, whose principle is shown in figure 1.
Journal of Analytical and Applied Pyrolysis, 2000, 56(2):145-166
Journal of Supercritical, 1997, 13(1):261-268
Progress in Energy and Combustion Science, 2008, 34(1): 47-90.
Acknowledgements: Funded by: Natural Science Foundation of China (No.50776101)；The Fundamental Research Funds for the Central Universities (No.CDJXS10 14 11 50)

Latest Development of Accuracy Recession of Numerically-Controlled Machine Tools Liu shang1,Zhang xiaolong2 Kunming University of Science and Technology, Kunming 650500,China Email:420513004@qq.com Key words: CNC machine tools; Accuracy of the recession; Accuracy stable; Wear and tear Abstract: Accuracy recession is the prime cause which affects the accuracy retentivity of highly-precise Numerically-Controlled Machine Tools, and in recent years a lot of work has been done in this field at home and abroad.
The accuracy recession also known as no effect of precision abroad, and the no effect does not mean the physical destruction of the material itself, but refers to that the work performance of the machine tool cannot meet the requirements of processed products, therefore accuracy recession can also be seen as one of the manifestations of non-destructive failure of the precise CNC machine tool [4].
In our country, the major science and technology project, 'High-leveled numerically-controlled machine tools and basic manufacturing equipment', successively and specifically listed issues to support the research on the accuracy recession of numerically-controlled machine tools in 2009, 2010 and 2011.
[2] SU K H,CHENG M Y.Countouring Accuracy Improvement Using Cross-coupled Control and Position Error Compensator[J].International Journal of Machine Tools&Manufacture, 2008,48:1444-1453
[3] DAISUKE K,ATSUSHI M,IWAO Y.High-precision Machining by Measurement and Compensation of Motion Error [J].International Journal of Machine Tools&Manufacture, 2008,48:1103-1110

A Kinetic Model of Alumina Inclusion Nucleation In Molten Steel Shaobo Zheng a, Cunbo Yang b , Dan Zhao, Huigai Li Shanghai Key Laboratory of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai, 200072, China asbzheng@staff.shu.edu.cn, bcumtyangbo@126.com Keywords: Alumina Inclusion, Nucleation, Pseudomolecules, Nucleation Rate.
[8] Philippe.Rocabois, Jean.Lehmann, Henri.Gaye and Marc.Wintz, Journal of Crystal Growth 198/199(1999)838
[9] Jean.Lehmann, P.Rocabois and H.Gaye, Journal of Non-Crystalline Solids 282(2001)61
,Glass Science and Technology, Glass Forming System, Vol.1(Academic Press,New York,1983)p.406
[14] W.A.Tiller, The Science of Crystallisation-Microscopic Interfacial Phenomena(University of Cambridge Press, Cambridge,1991)p.339.

If using high cost of electron beam welding, the strength of welded joint only reaches 85% of parent material strength, though it is harder than TIG welding.
Experimental Experiment material is ZL114A under T6 treatment, The size of welding plate is 300mm×80mm×4mm，its chemical composition is showing in table 1.
Acknowledgements This work was financially supported by Aviation Science Funds of China (2009ZE56011).
Journal of Shenyang industry University, Vol. 24(2002), p.23 [3] An Zhenzhi, Zhang Xichuan, Wang Shufang.
Journal of Shenyang industry University, Vol. 22(2000), p.123 [4] Ji Yajuan, Ma Xiangsheng, Luan Guohong, et al.

The Study on the Apoptosis of Rat’s Granule Cells Induced by Ethanol Shufeng Li1,a, Li Hao2,b, Huili Tong1,c, Dandan Zhao1,d and Yunqin Yan1,e* 1College of Life Science, Northeast Agriculture University,Harbin, 150030,China 2College of Wildlife Resource, Northeast Forestry University, Harbin, 150040,China alishufeng11@sina.com, bhaoli958@sohu.com, ctonghuili2004@163.com, dZ.dd.1986@163.com, *Corresponding author:eyanyunqin@sohu.com Keywords: Ethanol, Apoptosis, Granule cell Abstract.
The alcohol is a common kind of chemical materials which are often drinken.
Wang: Chinese Journal of Cancer Prevention and Treatment Vol. 8(2001), p. 585 (In Chinese) [4] H.
Li: Basic Medical Sciences and Clinics Vol. 154(2000), p. 58 (In Chinese) [5] M.Xia, M.
Hu: Chinese Journal of Cell Biology Vol. 31(2009), p. 559 (In Chinese)

Acknowledgements The research work was supported by Shandong Province Natural Science Foundation NO.ZR2011DM011.
Journal of Hazardous Materials. 213-214(2012):447-456 [2] D.P.
Journal of Hydrology. 517(2014):762-776 [3] Cook E, Bird T, Peterson M et al.
Science. 253(1991):1266 [4] Fisher S, Nicholas NS, Scheuerman PR.