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Introduction Nano materials are increasingly receiving recognition as practical structural and functional materials with good prospect, and have been developed extensively in recent years.
Mechanically, carbon nanotubes are significantly stiffer than currently commercially available carbon fibers, and can therefore be used to strengthen composite materials or atomic force microscope tips.
Therefor, special materials and designs must be used in attempt to overcome this problem.
Lieber: Science 291 (2001), p. 630
Stonier: SAMPE Journal 27 (1991), p. 9

Test Program and Testing Selection of raw materials:The common, stable quality cement, coarse and fine aggregate have been selected.
Beijing: China building materials industry press, 2005
Journal of tangshan college, 2010, (3): 27 to 30
Journal of south China University, 2011, (1): 18 to 22
Journal of luoyang institute of technology, 2008, (2): 84-86

Journal of Applied Physics. 1990(56): 623-625
Journal of Applied Physics[J],1961(32)510-519
Journal of Applied Physics, 1980(51):494–500
Solar Energy Material & Solar Cells, 2003(75): 277-283 [11] T.C.Kandpal, S.S.Mathur, R.N.Singh.
Solar Energy Materials & Solar Cells. 2009(93):950-951

Firstly, select the element type and material properties.
References [1] Zhao Han, etc, Review of study of magnet machine and Mechanism, Chinese Journal of Mechanical Engineering, 39(12),2003:31-36 [2] Handley Robert C O．Principles and application of magnetic material.
Journal of Central South University, 2006,37(5):970-975 [4] Mitsuo Uno and Takaaki Masuzoe.
International Journal of Rotating Machinery, 2004,10(5): 337-344
Science Press,2002 [8]LuShu.

Construction technology analysis of space heterotypic steel frame of concert hall in Changsha Weijun Yang1, a, Yao Li 1, b, Fuzhong Chen 2, c 1Changsha University of Science and Technology, Changsha, Hunan, 410114, China; 2China Construction Fifth Engineering Division Corp.
Welding materials according to the structural steel material can be selected in table 1 .The construction process is as follow: in order to adjust installation precision, first, positioning spot welded, then welding.
Table.1 The list of welding material The base material Manual welding CO2 shielded semi-automatic welding Q345 E50 ER50-6 Q235 E43 ER43-1 Q345＋Q235 E43 ER43-1 Conclusion Based on the space heterotypic steel frame of concert hall in Changsha, it focuses on the research of the subsection of lifting technique, measurement positioning technology and welding technology, which provide a solid theoretical foundation for the smooth engineering construction.
Reference [1]ZHANG W , Xu N , Ultimate bearing performance analysis of linear steel box column Building Structure 2010,40(2):194-196(In Chinese) [2]SHU X P， LU B R ， SHEN P S ，YUAN Z S ，YAO Y， ZOU H , Experimental research on load-carrying behavior of big cantilever steel frame with variable cross-section beam and zigzag column[J] Journal of Building Structures 2010, 31(10): 62-68(In Chinese) [3]GAN F L, XIAO Q ,ZHANG LI ,Study of optimal three-point lifting in pole tower integral hoisting Mechanics and Engineering 2000, 22(3): 31-34(In Chinese) [4]LIU S T, LI Z J , Study on the rope system “double-crane and five-hoist point” for the whole erection of the large-scale slender R.C column journal of Tianjin university 2001,3(2):268-272(In Chinese) [5] YU J Y  ,  ZHU J J  , ZOU Z R  ,  ZHANG C , Research on the New Deflection Measurement Method for Large Span Bridges journal of Hunan university(natural sciences)  2007, 34(10):31-34(In Chinese)

Materials and Methods Zn-Al LDHs and CLCDs Preparation.
Maes: Applied Clay Science, Vol. 38(2008), p. 237 [6] R.
Rangel:Solid State Sciences Vol. 12(2010), p. 1013 [7] E.
Popovicia: Journal of Hazardous Materials Vol. 177(2010), p. 150 [8] H.
El-Shazly: Chemical Engineering Journal Vol, 160(2010) , p. 63

In recent years, the cement stabilized sandy soil is used as roadbed material with the development of road in the area [3-4].
Experiment Design In line with the relevant Chinese regulations of Test Methods of Materials Stabilized with Inorganic Binders for Highway Engineering (JTG E51-2009), test blocks were made with a dimension of Φ 50 × 50 mm.
Liu, A Study on treating wet and soft sandy silt subgrade by using vibrio-replacement stone column, Journal of Henan University (Natural Science), 5 (2011) 535-538
Guo, Experimental study on properties of texsol used in road, Journal of Building Materials, 4 (2010) 545-549
Sun, Comparison analysis of the lateral bearing capacity of bored pile and PCC, Journal of Henan University (Natural Science), 5 (2010) 533-536

Preparation and photocatalytic study of nano Cadmium sulphide Sk Ershadul Haque a, B.Ramdas a and A.Sheela* a aCentre for Excellence in Nano materials, Materials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamil Nadu, India.
Therefore, the removal of these toxicants and hazardous solvents from water has become one of the biggest challenging issues in environmental science [1–4].
Experimental Materials and Methods Analytical grade of CdCl2 (99.5%, Thomas Baker) and Na2S (S D Fine) were used as starting materials without further purification.
Kurup, Studies on the adsorption kinetics and isotherms for the removal and recovery of Methyl Orange from wastewaters using waste materials, J.
McEvoy, Role of nanoparticles in photocatalysis, Journal of Nanoparticles Research 1 (1999) 439–458

There are two possibilities to transform the crystalline material into amorphous alloy by solid-state synthesis: one way allows production of homogeneous materials starting from blended elemental powder mixtures – this is the mechanical alloying (MA), the other way when the starting material is a powder of crystalline alloy – this is the mechanical milling (MM).
MA is used to synthesize a variety of advanced materials [2].
Suryanarayana, Mechanical alloying and milling, Progress in Materials Science 46 (2001) 1-184
Shek, Thermal and mechanical properties of Cu–Zr–Al bulk metallic glasses, Journal of Alloys and Compounds 434–435 (2007) 71–74
Fleury, Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses, Materials Science and Engineering A 437 (2006) 248–253

However, the method is too harsh for SiC raw materials, crystal growth equipment and operating environment.
Many technological parameters affect the final crystal quality, such as growth temperature, temperature gradient, particle size and purity of raw materials, distance between raw materials and seed crystals, growth pressure, polarity of seed crystals and seed orientation, etc.
Moreover, with the growth of crystals, some technological parameters are constantly changing, such as the growth interface temperature, the distance between raw materials and growth interface, the degree of graphitization of raw materials and so on.
Journal of physics: condensed matter, 17 (2005) L85–L91
Peng, Investigation of Stacking Faults in 4H-SiC Single Crystal, Journal of Inorganic Materials, 223(2018) 540