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D-C model defines the initial modulus Ei as(Eq. 6) : (6) Where the modulus number Ki and modulus exponent n are dimensionless material parameters; Pa is the atmospheric pressure that is used in the formulation to eliminate unit system selection effect.
Acknowledgements The research work is sponsored by the National Natural Science Foundation of China (ID 50979069), Key Technology R&D Program of Tianjin (ID 10JCYBJC03400), Traffic Department of Transportation Technology Projects (2011 328 346 1190) and Traffic Department of Transportation Technology Projects (2011 328 224 1440).
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L Barbour: Canadian Geotechnical Journal, (1995), p. 440 [3] C.
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Experimental Works Experimental Materials.
The compositions of the five carbide materials are listed in Table 3.
As shown in the Table 5, the diffusion depths of W element from each tool materials to the alloy cast iron are about 1.6μm.
Li, A study on diffusion wear of machining tool and simulation by diffusion couple, Key Engineering Materials, 353-358 (2007) 813-816
Barin, Thermochemical data of pure substances, Science Press, Beijing, 2003

Nekrasov of the National Academy of Sciences of Ukraine, 1 Acad.
Materials and Methods of Researches The investigations were carried out on Al-Cu alloy samples with copper content 25.0 – 36.0% (mass.), the rest is aluminum.
Archives of Materials Science and Engineering, 34(1), 14-18
Materials.
Journal of Technical Physics, 67(4), 7-12

Agricultural resources information is to realize the land resources, water resources, climate data, fertilizer material and other Agriculture resource’s assessment and management.
Along with the computer cost is reduced greatly, the development of computer network technology and the overall level of science and technology and the continuous improvement of the economy level, has broad application prospects.
“Development Status of Agricultural Geographical Information Systems in China and Its Enlightenment to Tianjin”, Tianjin Agricultural Sciences,2010(5),pp:76-79
“The geographic information system in agriculture were reviewed and the application”, Heilongjiang Science and Technology Information, 2008(35),pp: 26+332
[4] Wu Chun-jie.“ Design of Comprehensive Geographical Information System for Regional Agriculture ”, Journal of Anhui Agricultural Sciences,2010,38(20),PP:10995-10997

Wear is one of the three main forms of destruction and scrap materials and equipment, lubrication is effective technical that can reduce wear, reduce or avoid material wear[1-3].
Nano-materials have special properties, such as the small size effect of nano-materials, surface and interface effects, quantum size effect, volume effect, macroscopic quantum tunneling effect, special light absorption properties, electrochemical properties and low density, low flow rate, high absorbency, high-mix, weak compression characteristics, this is not possessed by conventional materials[9].
At present, the research field of nanometer materials is constantly expanding, from the nanocrystals, nano amorphous phase, nano particle material research extends to the research of nanometer composite material[2].
[6] S.Wen: Chinese Journal of Mechanical Engineering.
She: Mechanical Science and Technology for Aerospace Engineering.

The Journal of Dental Faculty Istanbul Vol. 31 (1997), p. 144
Campbell: Evaluation of surface roughness and polishing techniques for new ceramic materials.
Powers: Surface roughness of two polished ceramic materials.
Advanced Materials & Processes Vol. 154 (1998), p. 23
Oilo: In vivo wear ranking of some restorative materials.

Four different methods to store hydrogen are currently available: liquid hydrogen, compressed gas, metal hydrides and sorption on different porous materials such as carbon materials, zeolites, metal organic frameworks, and nano-structured metal particle or films.
Journal of the American Chemical Society, 128 (3): 726-727(2006)
The optimum average nanopore size for hydrogen storage in carbon nanoporous materials [J].
Science, 285: 91-93(1999)
Computational Materials Science 40, 341-344(2007)

The color space expressing the color characterization of color digital camera is RGB space which follows the additive color process law, but, the color space expressing the color characterization of rendering materials of camering object always is YMC space which follows the subtractive color process law.
Because both RGB space and YMC space are a device dependent color space and their color expressions depend on their own color rendering materials, it is difficult to interconvert them accurately.
The former establishes math conversion models between RGB space and XYZ space based on analyzing optic characterization of devices and materials involved in, such as establishing color reproduction curves through analyzing sensitization characterization of sensitization materials.
Zhang, Science technology and Engineering Vol. 7 (2007), p. 352
Bing: Journal of Software Vol.11 (2000), p.845.

Base on the of mechanics of materials, the calculation formula of crown is : [4].The work load of the corrugated roller has not been considered in theoretical derivation ,and using static deflection instead of dynamic deflection[5].
On tile roll under the action of force, the maximum deflection can be calculated by the material mechanics on simply supported beam.
Conclusion (1) We establish the mathematical model of the corresponding upper and lower the height of the corrugated roller, based on the mechanics of materials , and introduce the corresponding convex curve equation.
Journal of Hubei Polytechnic University, 1998,13(4):43-47
Mechanical science and technology,1999,18 (1):51-55

Synthetic Aperture Focusing Technique (SAFT) becomes increasingly popular for flaw detection in fine structure materials and medical diagnostics, where it is used for the sake of improved resolution and image quality [1, 2].
If sound velocity in a prism is less than that in an inspected material, then angle α2 will be larger than angle α1.
Shevaldykin, Acoustic B- and tomography of large-structure materials by pulsed echo-method (in Russian), J. 
Makarov, Estimation of the error when calculating the arrival time of a detected echo-signal, Russian Journal of Nondestructive Testing, 48, 5 (2012) 268-271
Advanced Materials Research, 1040 (2014) 959-964