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Spring steel 65[8] with yield stress 784MPa, Young's modulus 206GPa, Poisson's ratio 0.28[9], density 7.8×103 kg/m3 safe parameter 1.5 and allowable stress 523MPa, is selected as the material of nanopositioner. 3D eight-node structural solid elements are chosen for the mesh generation (SOLID45).
Acknowledgement The project is supported by the National Natural Science Foundation of China No. 10372069.
Chinese Journal of Scientific Instrument.
[9] Yilin Su, et al., Research Room of Material Mechanics of Tianjin University.
Material Mechanics.

In experiment the structure shown in Figure 1 improved, electromagnetic coil instead of permanent magnets, increasing the current in electromagnetic coil to increase sealing pressure, and setting coil and magnetic pole on the output shaft, filling non-magnetic materials in a sealed slot.
Magnetic fluid seal of gearbox output shaft Permanent magnet use optimum comprehensive performance sintered Nd-Fe-B type, material grade: N38.
[3] Li Decai, Theory and Application of Magnetic Fluid, Science Press, Beijing , 2003
[4] Pan Yuxian, Rui Yannian and Shen Ming, Machine Manufacture, Vol. 43 , 2005, pp.44 – 47 [5] Sun Mingli, Li Decai, Cui Hairong and He Xinzhi, “Numerical Simulation for Magnetic Fluid Sealing Device,”Journal of Beijing Jiaotong University, Vol. 32, 2008, pp. 116 – 118

Raw materials used in this experiment include：(1)P.II.42.5R cement produced by Guangzhou Zhujiang Cement Plant, with density of 3130kg/m3 and Blaine specific surface area of 343m2/kg, (2)Fly ash with density of 2.14 kg/m3 and Blaine specific surface area of 414 m2/kg, (3)River sand and gravel, washed and surface dried before use, (4)FDN-5R, naphthalene superplasticizer, a product of Zhanjiang Admixture Plant, (5)Distilled water and AR grade NaCl.
Locke: Effect of Impressed Current on Bond Strength Between Steel Rebar and Concrete, Proceedings of corrosion 83, National Association of Corrosion Engineers, Anaheim, CA, USA, 1983, pp178 [3] Rasheeduzzafar: Degradation of bond strength between reinforcing steel and concrete due to cathodic protection current, ACI material journal, 1993,90, No.1, pp8-15 [4] N.
K Glass: Corrosion Science, 1997,39,NO.5, pp1001-1013 [6] N.R.

Journal Citation (to be inserted by the publisher ) Copyright by Trans Tech Publications Osteogenic Potential of Cultured Bone/Ceramic Construct: A Comparison with that of Marrow Mesenchymal Cells/ Ceramic Composite Jin Iida,1 Takafumi Yoshikawa,2 Kunio Ichijima 2 and Yoshinori Takakura 1 1 Department of 2Pathology, Kashihara City, Nara 634-8522, Japan zin@naramed-u.ac.jp, 2 Department of Pathology, Kashihara City, Nara 634-8521, Japan tyoshi@naramed-u.ac.jp Keywords: Osteogenic potential, Bone marrow cells, Cultured bone tissue, Cryopreserved cells Abstract.
Introduction Recent advances of the biological sciences and culture methods have allowed us to control cellular defferentiation and growth.
Combining this cultured bone tissue with synthetic bone material has allowed the production of synthetic bone with increased osteogenic potential [4-6].
Materials and Methods Preparation of cryopreserved marrow cells Marrow cells were obtained from the bone shaft of femora of 7-week-old, Fischer 344, male rats and were cultured in standard culture medium (SCM) of MEM containing 15% fetal bovine serum and antibiotics.

(2) DFN is the threshold electric field required for field emission and is a function of the cathode material and surface properties and can be written as (3) where φ is the work function of the cathode, β is the geometric enhancement factor.
In the experiment, the cutter is double-edged carbide end milling cutter, and the material of the probe is bearing steel.
Table1 The cutting parameters Material Turning spindle speed [rpm] Milling spindle speed [rpm] Feed rate [mm/min] cutting depth [mm] Aluminum 90 9000 2 0.05 To repeat the 3.1 process 3 times with the 3 wore φ0.5mm milling cutter, and when the gap is 2μm, the current-voltage cures are shown in Fig.11.
Acknowledgements This work was financially supported by National Science and Technology Major Project (2012ZX04010061) and National Defense Basic Scientific Research program of China (A22201320××).
Journal of Applied Physics. 107 (2010) 103303.

This important steelwork was demolished in 1941 to recover the metallic material to be used in war.
Mazzucchetti on the "Journal of Civil Engineering" in 1867 (Report on the work carried out for the final station of the railways in Turin) [1], until the monograph published by L.
This is probably due to material (i.e. concrete, pieces of tiles and bricks) that fills the space between the heads of the trusses and the masonry.
This material becomes wet after rainwater leaking and provokes a high moisture content in wood that is therefore more subject to xilofagus fungis attack. 80% of the timber elements of the trusses have been classified according to resistance through Thematic Fiche (i.e.
Touliatos (editors), Interaction between Science, Technology and Architecture in Timber Construction, Elsevier, Paris, 2004

It can not only relieves the strain on energy supply, reduces dependence on fossil fuels[1], but also has a wide raw material sources.
Experimental 1.1 Materials And Equipment PME: Lab homemade, in line with the national standard GB20828-2007.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51076069 and 51376095).
Journal of JiangSu University, 2010, 31 (1): 31-39

Augmenting the ports dimension makes for reducing flow resistance and saving copper material.
But the critical diameter for back-fire is only mentioned in correlative reference as 3.5mm on round port for natural gas, without information about burner material.
For copper material, the critical diameter should be larger according to the thermal conductivity.
Mishra, Experimental studies of flame stability limits of CNG–air premixed flame, Energy Conversion and Management, Volume 48, Issue 4, April 2007, Pages 1208-1211 [9] Bernard Lewis, Guenther von Elbe, Combustion, Flame and Explosion of Gases, Academic Press; 3 edition (July 12, 1987) [10] Pierre Pelce and Paul Clavin, Influence of hydrodynamics and diffusion upon the stability limits of laminar premixed flames, Journal of Fluid Mechanics (1982), 124: pp 219-237 [11] Jared Crosby, Lean Premixed Flame Stability Investigations, UTSR Gas Industrial Turbine Fellowship Participant at Pratt & Whitney, May 23 - Aug 12, 2005 [12] S Ishizuka, C K Law, An experimental study on extinction and stability of stretched premixed flames, 19th Symp Int on Combustion (1982) , Volume: 379, Issue: 1, Publisher: The Combustion Institute, Pittsburgh, Pages: 327-335 [13] Paul Clavin, Dynamic behavior of premixed flame fronts in laminar and turbulent flows, Progress in Energy and Combustion Science, Volume

Unfortunately, there exist only a few experimental data for multi-axial yield surfaces of any type of cellular solids, and standard experimental equipments and methods for hydrostatic compression on foam materials are few.
Journal Of High Pressure Physics, Vol. 20 , No. 1, 2006.
Journal of Beijing University of Aeronautics and Astronautics, Vol. 29, No. 11, 2003.
Mechanical Sciences, Vol. 44 (2002), p. 359~406
A simple elastoplastic model for foam materials.

Tewari Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee-247667, India *email: vnshuklamtech@gmail.com Keywords: High velocity oxy fuel, Microhardness, Microstructure, High temperature oxidation.
The nominal chemical composition of the substrate material is given in Table 1.
Prakash, Mechanical and metallurgical properties of plasma sprayed and laser remelted Ni3Al coatings on boiler tube steels, materials Science and Engineering A, 368 (2004) 149-158
Berndt, Ed., Materials Park, OH, USA: ASM International, (1992) 735-742
Sampath, Eds., Materials Park, OH, USA: ASM International, (1994) 121-126