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Use of the models shows that further advances in racquet technology using stiffer and lighter materials are unlikely to speed the game up.
The Frame The frame may be of any material, weight, size or shape.
Blackwell Science, Osney Mead, Oxford, UK, 291-299 (1998)
Haake, Blackwell Science, 231-237 (2002)
Coe, Blackwell Science, 3-40 (2000)

Introduction The materials for an urban sculpture are selected by the sculptor according to cost, demand of expression, environment context and scale in his times.
During the latter half of 20th century and the 1st decade of 21st century, stainless steel has been become the preferred materials for more and more sculptors.
Stainless steel has been widely used in building construction and industry production since 1920s and turned into sculpture materials that traditionally dominated by marble and bronze.
Combining with forging technique, stainless steel can achieve the same or a larger size than bronzes, marbles and other traditional materials at a much lower price and a lower technical difficulty.
In addition, owing to high output of crude steel and relatively developed metallurgy industry in China, stainless steel forging are more popular naturally and does not depend on specific raw materials field like stone materials.

Materials and Methods Plant Cultivating and hydroponic equipments.
Fayiga: International Journal of Phytoremediation, vol. 6 (2004), p. 35 [2] F.
Santos: Science of the total environment vol. 364 (2006), p. 24 [4] J.
Parkpian, et al.: Journal of Environmental Science and Health, Part A ,vol. 38(2003), p. 2773 [5] L.
Ma: Journal of hazardous materials, vol. 180 (2010), p. 662 [9] H.Guo, Z.

Modal analysis of oversize ball mill tube based on ANSYS Litao CHEN 1,a, Yujun XUE 1,2,b, Yi LIU 1,c, Jishun LI 2,d 1 School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, P.R.
China. 2 Henan Key Laboratory for Machinery Design and Transmission System, Henan University of Science and Technology, Luoyang 471003, P.R.
The ball mill is one kind of breaking plants which used widely in building materials, metallurgy, mineral processing and so on.
Modeling and Diving into Network of the Strength Analysis of Ball Mills Drums[J].Journal of Zhuzhou Institute of Technology, 2003, 3:89-91
Journal of Xi’an Technological University. (2007)

Process of fluid film bearings improvement goes in several directions: improving existing and developing new manufacturing technology [1]; improving the design featuring new developments, as well as use of new materials [2-5].
Research in this area may be based on use of new materials, newly discovered physical effects, etc.
Whitney, Fluid Film Bearing Materials, Encyclopedia of Tribology, (2013) 1200-1216
Nordmann, Active Vibration μ-Synthesis-Control of a Hydrostatically Ssupported Flexible Beam, Journal of Mechanical Science and Technology, 21 (2007) 924-929
Koskinen, Fuzzy Control Schemes for Active Magnetic Bearings, Lecture Notes in Computer Science, Vol.695 (1993) 137-145

Nanocellulose is used as nano-additives for hardening polymer, packaging materials, antimicrobial films, biomedical implants, etc.
Dufresne Nanocellulose: From Nature to High Performance Tailored Materials.
Nunes Materials and membrane technologies for water and energy sustainability, Sustainable Materials and Technologies, 7 (2016) 1-28
Shudong Modification of polyethersulfone membranes – A review of methods, Progress in Materials Science 58 (2013) 76–150
DasGupta Characterization of CO2 plasma treated polymeric membranes and quantification of flux enhancement Journal of Membrane Science, 323 (2008) 1-10

Then, the stirring phase enable the materials of two work pieces mix together.
Allehaux, Journal of Materials Processing Technology, Volume 171, Issue 3, 1 February 2006, Pages 348-357
Sheikhi Materials Science and Engineering: A, Volumes 445-446, 15 February 2007, Pages 501-508
[15] Chao, Y., and Qi, X., 1998, "Thermal and Thermo-Mechanical Modeling of Friction Stir Welding of Aluminum Alloy 6061-T6", Journal of Materials Processing & Manufac-turing Science, vol. 7, p. 215-233
[16] Gould, J., and Feng, Z., 1998, "Thermal and Thermo-Mechanical Modeling of Friction Stir Welding of Aluminum Alloys," Journal of Material Processing & Manufacturing Science, 7(2), pp. 185-194

Results and discussions Fig. 1 shows a typical tensile curve of the studied Ni-Ti superelastic material used for this work.
Makita,’’Pseudoelastic Behaviour of TiNi Shape Memory Alloy Subjected to Strain Variation’’, Journal of Intelligent Materials and Sytem Structure (1994) 5, 5, 694-701
[3] Asaoka T, Yamashita H, Saito H, Ishida Y. ‘’ Effect of a Small Amount of Hydrogen on the Pseudo-Elastic Properties of Ti-Ni Alloy’’, The Journal of the Japan Institute of Metals (1993) 57, 1123-1129 [4] Yokoyama K, Watabe S, Hamada K, Sakai J, Asaoka K, Nagumo, ’’ Susceptibility to delayed fracture of Ni–Ti superelastic alloy’’, Materials Science and Engineering A, 34 (2003) 91-97
Muellner,’'Hydrogen solubility and diffusion in the shape-memory equiatomic nickel-titanium alloy'’, Journal of Physics: Condensed Matter 1(14) (1989) 2473-2482
Otsuka, ‘’ Effect of cyclic deformation on the pseudoelasticity characteristics of Ti-Ni alloys’’, Metallurgical and Materials Transactions A,17, 1 (1986) 115-120 [9] L.C.L.

Materials Science. 45, 103-109
Materials and Design. 46, 766-775
International Journal of Engineering Science and Technology. 12, 53-61
Materials Science & Engineering A, 398, 246-251
Materials Science & Engineering A. 408, 131-135

The results shows that the best activation conditions of calcination for coal gangue activation time is1.5h, under the condition of calcination temperature 650˚C, water cooling, the Al3+ dissolution rate can reach 70.14%.After activation of coal gangue, the kaolinite convert directly into cetakaolinite, it’s active composition SiO2 and Al2O3 present loose shape, good activation, can be used as an adsorbent and catalyst materials.
Raw materials and analysis This experiment adopts the raw materials are from Heilongjiang Yilan coal gangue, the chemical composition analysis with chemical method[3], the chemical composition of coal gangue parallel experimental analysis, three groups of experimental data on average fill in the table.
Tab.1 The main chemical composition of Yilan coal gangue Raw material SiO2 Al2O3 Fe2O3 CaO MgO SO3 loss Mass fraction 48.60 37.25 1.2 1.82 1.22 0.62 9.29 After calcination kaolinite in coal gangue mineral dehydration decomposition, before stability of alumina and silicon oxygen tetrahedron tetrahedron split to form chains of breakpoints, formed on the thermodynamic instability of glass phase structure, by the activity of kaolinite generate partial kaolinite, activated and structure activity increase in the number of amorphous SiO2 and Al2O3.
Journal of Materials Science and Engineering 2005, 23(1):88-91
Journal of east China university of science and technology (Natural Science edition) 2007, (6):765-770