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area decreases due to the loss of material.
Archard: Journal of Applied Physics Vol. 24 (1953), p. 981 [2] L.
Johansson: Journal of Tribology Vol. 116 (1994), p. 247 [13] I.
Rabinowicz: Friction and wear of materials (Wiley, 1995) [25] L.
Pradeilles-Duval: Comptes Rendus de l'Académie des Sciences Series {IIB} - Mechanics Vol. 329 (2001), p. 803 [29] G.

GJB2038-94 wave absorbing material reflectivity test method 102"RAM reflectivity arch testing method" was used.
Acknowledgments This work was supported by the Natural Science Foundation of Hebei Province (E2013208122), The Natural Science Youth Foundation Project of Education Department of Hebei Province(QN20131125) and Research Fund for the Doctoral Program of Hebei University of Science and Technology (010085).
Journal of Yunnan University (Natural Sciences: 2002, 24 (1A): 58~62 [2] Zili Yang.
Heilongjiang Environmental Journal. 2010(34):19-26 [3] Yuling Zheng, Jianjun Yu , Jingliang Qin, et al.
Journal of Huazhong University of Science and Technology. 2001 (29):14-15

With the hybrid technology, new ecology could be rebuilt. 1 Materials and methods 1.1 Materials.
Procedia Environmental Sciences. 13 (2012) 1030-1036
Journal of Environmental Management. 93 (2012) 140-146
Journal of Great Lakes Research. 36 (2010) 520-539
Journal of Great Lakes Research, 38 (2012) 35-48

When the cold-formed thin-walled steel bonds to bamboo plywood, the combined effect of the two materials is efficiently played.
Reasonable assembly of bamboo plywood and cold-formed thin-wall steel not only gives full play to the performance of these two materials, but also saves a lot of steel and concrete.
In addition, heat-insulating materials such as polystyrene foam and sound insulation materials such as polyester fiber can be filled in the cavities of steel-bamboo composite slabs.
On the surface of bamboo plywood, we can set waterproof and fireproof materials as protection, making steel - bamboo composite slabs possess the function of structure, living and appearance.
Journal of Bamboo Research, 2000，19(4): 72-75

The materials Young’s modulus are and , the densities are and .
Chang: Journal of Intelligent Material Systems and Structures, Vol. 9 (1998), p.920
Chang: Journal of Intelligent Material Systems and Structures, Vol. 9 (1998), p.929
Chang: Smart Materials and Structures, Vol. 10 (2001), p.354
Chang: Smart Materials and Structures, Vol. 10 (2001), p.370

Introduction Sheet materials often experience complex strain path changes in sheet metal forming applications.
Materials & Tests Two kinds of cold-rolled TRIP steels provided by Baosteel with 590Mpa and 780Mpa grade were investigated in this study.
Acknowledgments This work was supported by Guangdong provincial natural science foundation of china through grant number 2016A030313519.
Hora, et al., Numerical investigation of the post-necking behavior of aluminum sheets in the presence of geometrical and material inhomogeneities, International Journal of Solids and Structures, 102-103(2016) 56-65
Lin, A model for strain-induced martensitic transformation of TRIP steel with strain rate, Computational Materials Science, 40(1) (2007) 101-107

Xiongyong Dong, Shouzhen Zhang that similar projects to change the project price determined in the contract, the materials used are similar, by mutual agreement, the materials making it up, can also be used valuation methods similar projects in the contract, that is, with similar projects, using the same fixed rate change to determine the price on contract for the construction of market in the form of list price.
Table2 Schedule of materials in the construction design No.
E′=A-B+C for other items to take charge after the change rate, A change the emperor materials weathered basalt mixed with clay rates, B is the material of origin laterite gravel rates.
[10] Liming Xia, Yihong Wang: China Safety Science Journal, 2007(12), p.70-75, In Chinese
[13] Yanxi Li, Zhi Tao: Journal of Shenyang Normal University(Natural Science), 2002, 20(2), p.86-90, In Chinese.

Thermal Analysis of a Satellite Borne Instrument Bo CHEN1,2 , Ning Li1,2 1 National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China 2 The Key Laboratory of Microwave Remote Sensing, Chinese Academy of Sciences, Beijing 100190, China chenbo@mirslab.cn, cbo_111@163.com Keywords: Thermal simulation, Thermal analysis, CAE, Thermal modeling Abstract.
Table.2 Thermal physical parameters of materials Material Thermal conductivity [] Specific heat capacity [] Density [] Aluminum 121.4 920.9 2780 Copper 385 385 8900 Results and Discussion Thermal Results of Analysis and Discussion.
References [1]B.Chen: Advanced Material Research, Vols. 156-157(2011),p.611-614 [2]B.Chen: Advanced Material Research, Vols. 199-200(2011),p.1551-1554 [3]B.Chen: Applied Mechanics and Materials, Vols. 52-54(2011),p.1411-1414 [4] J.B.Zhu: Electro-Mechanical Engineering, Vol. 24(2008), p.11 (In Chinese) [5]Y.
Li: Journal of Zhengzhou University of Light Industry (Natural Science), Vol. 22(2007), p.75 (In Chinese) [6]G.C.
Wang, Tongmin Jiang: Journal of Beijing University of Aeronautics and Astronautics, Vol. 32(2006), p.716 (In Chinese) [7]Q.

So SiO2 aerogels can be widely used as window insulation materials [2], high-performance rechargeable batteries [3,4], Cerenkov detectors [5,6], optical sensors for oxygen gas [7], efficient adsorbent and catalyst carrier and so on [8,9].
According to International Union of Pure and Applied Chemistry (IUPAC) definition, both samples exhibited type IV isotherms with type H2 hysteresis loops, typical of mesoporous materials.
Wu, High strength SiO2 aerogel insulation, Journal of Non-Crystalline Solids, 225(1998) 101-104
Manara, Silica Aerogel Granulate Material for Thermal Insulation and Daylighting, Solar energy, 79(2005) 131-139
Knez, Adsorption of Toxic Organic Compounds from Water with Hydrophobic Silica Aerogels, Journal of Colloid and Interface Science, 310(2007) 362-368

Even though A356-SiC Metal Matrix Composite (MMC) materials are using for Aerospace and Automobile industries; but unable to use widely due its poor machinability [5].
Used stir-casting method for uniform scattering of nanoparticles to increase the stuffs of the composite materials [2].
Shabani, “Mechanical Properties of A356 Matrix Composites Reinforced With Nano-Sic Particles” Strength of Materials, Vol. 44, No. 6, p.p 686- 692November, 2012 [4] Sudhir Kumar*, S.P.
Jassim, “ Observations on the Electrical Properties of Al-Sic Composite”, Journal of Al-Nahrain University Science, Vol.15 (4), December, 2012, pp.120-128 [7] D.Suneel, Rao DN.
[9] ASTM Standard: E 92-82, “Standard Test Mehod for Vickers Hardness of Metallic Materials” [10] http://www.ndt-ed.org / EducationResources / CommunityCollege / Materials / Physical_ Chemical / Electrical.htm [11] G.E.