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Harbin ,China 150040 2 Institute of Engineering Mechanics of China Earthquake Administration, Harbin,China150080 3School of Civil Engineering, Northeast Forestry University.
Acknowledgements Supported by: Research Found for earthquake sponsored by Ministry of national science and technique(200808021) References [1] Fusheng Zhou, Xun Guo and Zhihua Zheng: Journal of Earthquake Engineering and Engineering Vibration.
Vol.22 (2002), p.58 (In Chinese) [2] Liqun Li and Weiqing Liu: Journal of Nanjing Architectural and Civil Engineering Institute, Vol.2 (2001), p.19(In Chinese) [3] Mehran Khoshbakht, Mark W.
Berman: Finite Elements in Analysis and Design, vol.42 (2006), p.414 [4] Liang Huang, Shengyun Chen, Chuxian Shiand Xiang Gao: Key Engineering Materials, Vol.400 (2001), p.911 [5] Code for seismic design of buildings in China (GB50011-2001), China Architecture & Building Press, Beijing (2001), in press
[6] Minzheng Zhang: Journal of Earthquake Engineering and Engineering Vibration.

Study on the photocatalytic degradation of ammonia nitrogen in aquaculture wastewater by Sn4+-doped nano-TiO2 under UV irradiation Xiaocai Yu＊1,a, Pengfei Zhu 1,b, Min Zhang1,c Jiyao Guo1,dand Xv Zheng1,e 1College of Marine Environment Engineering, Dalian Ocean University, Dalian, Liaoning, 116023, China axiaocyu@dlou.edu.cn, bzhupengfei851@163.com, czhangmindlfu@yahoo.com.cn， d137454523@qq.com, e740747215@qq.com Key words: Sn4+-doped nano-TiO2, Photocatalytic degradation, Ammonia nitrogen, aquaculture wastewater Abstract: The Sn4+-doped nano-TiO2 particles with various amounts of dopant Sn4+ irons was prepared by sol-gel method using tetrabutyl titanate(TEOT) as one of the primary raw materials at different calcination temperatures (400-700˚C).

In process of assembly all materials are in place
:in Systems Engineering,2002,5:180-193
:in IEEE Transactions on Engineering Management,1981,28（3）:71-74
:in IEEE Transactions on Engineering Management,2001,48（3）:292-306
:in IEEE Transact ions on Engineering Management , 2001, 48( 3) : 292-306

Experiment Materials and Methods Experiment Materials Raw Material Cornstalk, corncob, sorghum straw, soybean stalk, cotton stalk, from west of Kaifeng, after the nature airing with crusher crushing to 0.45 mm, then crush with hang down condole type nano ball mill, ball/powder weight ratio is 8:1(big ballФ10mm,small ballФ8mm ,proportion is 1:1）,ball-milling time is 30min.
The zymolysing reducing sugar yield of different raw materials type after ball milling crushing are shown in Fig.1.
There were no obvious wave trough in two map that appear, indicate that two materials crystallization area are all ruined, cellulose crystallinity are dramatically reduced.
Research on Pretreatment and Enzymolysis of Lignocellulosic Materials.
Biomass Chemical Engineering, 2010,44(2):1-4.

The 3D design models of machining parts which are received by process engineer are usually transformed into two dimensional (2D) engineering drawings, which are used for guiding machining by workers.
The model based definition can express multiple product information completely with the 3D model, which also contain the information of 2D engineering drawing.
The course of process is actually the evolution that workblank is machined into design model by removing the extra materials.
Kamrani, A new methodology for extracting manufacturing features from CAD system, Computers & Industrial Engineering, 51 (2006) 389-415
Shah, Recognition of User-Defined Turning Features for Mill/Turn Parts, Journal of Computing and Information Science in Engineering, 7(2007)225-235

Because of this, lightweight materials and structures are becoming increasingly important in vehicle design.
Many natural materials possess internal cavities to reduce the density and improve their impact resistant ability.
Bionic Engineering. 3 (2006) 3-9
Hopperstad, Static and dynamic crushing of square aluminium extrusions with aluminium foam filler, International Journal of Impact Engineering, 24 (2000) 347-383
Weber, Aluminium foams for transport industry, Materials and Design. 18 (1997) 217-220

Harms invented an indicator similar to the material flow length.
Bergmann also takes up the material flow and compares it with the information flow.
The structure is based on characteristics like technology, product, material or customer.
The relationships between these elements may be energy, material or information flow.
Xiaohui (Eds.), Modern industrial engineering and innovation in enterprise management, 1st ed., China Machine Press, Beijing, 2005, 699–703

Stress relaxation is the second key ingredient to describe the way stress develops in the growing silicide film.
These studies have been spurred by the possible use of refractory metal silicides as high temperature structural materials.
Thin films do exhibit much higher yield stresses than bulk materials.
Cabral Jr: Microelectronic Engineering Vol. 70 (2003), p. 144
Vol. 695, Materials Research Society, Warrendale, PA, 2002) p. 3

Introduction Over the last 50 years there have been significant advances in engineering the microstructure of cobalt base alloys used for HIP implant applications [1-4].
Key, J.
Rose, Materials for internal prostheses Yearbook of Science and Technology, McGraw Hill, New York, 1974
Symposium on Processing and Fabrication of Advanced Materials, TMS/ASM Fall Meeting, Cincinnati Ohio, October, 1996, 273-279
Symposium on Processing and Fabrication of Advanced Materials, TMS/ASM Fall Meeting, Cincinnati Ohio, October, 1996, 69-79

Stress relaxation is the second key ingredient to describe the way stress develops in the growing silicide film.
These studies have been spurred by the possible use of refractory metal silicides as high temperature structural materials.
Thin films do exhibit much higher yield stresses than bulk materials.
Cabral Jr: Microelectronic Engineering Vol. 70 (2003), p. 144
Vol. 695, Materials Research Society, Warrendale, PA, 2002) p. 3