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Its material flow process is that, mining resources flow in the production process as raw materials, and then products made from raw materials access to trading market.
After purchased and used by consumers, waste materials changed from products are released to the environment, while those generated in the production are directly discharged to the environment[4].
This industry converts waste materials generated during production and utilization into reutilizing resources and products, including two processes, firstly, wastes are converted into renewable resources, then renewable resources are processed into products[5].
Jilin University Journal Social Sciences Edition, 2006(5): 43~45(in Chinese)
Journal of Guangxi Normal University (Philosophy and Social Sciences Edition) ,2009,45(3):33~37(in Chinese)

The lubrication action of the carbon matrix of morph-genetic materials is fairly good, which probably makes them become a promising wear resistant or antifriction material.
Based on this, ramie fiber is tentatively used as the biological template to prepare the morph-genetic materials.
[3]Rambo, C.R, Sieber, H, Genova:Journal of Porous Materials Vol. 15(2008),p.419
[4]Di Zhang,Binghe Sun,Tongxiang Fan: Science in China Ser.E Eng.
[16]Li ShangChien:Ma.Sc.thesis,College of Materials Science and Technology,National Sun Yat-sen,TaiWan,2002. ( In Chinese).

Materials and Methods Test materials.
In this test, the white birch fiber and potato starch were taken as the primary materials.
Journal of Materials Science & Engineering, Vol.123(2010), p.136-139 [3] Yuan-yuan Li.
Journal of Jinan University Vol. 5(1995), p. 32-37 [6] Liu zhuang, Wang yong: Study on Composite Cushioning Packing Material of Corn Stalk Flax.
Journal of Harbin University of Commerce (Natural Sciences Edition), Vol.22(2006), p.91-93

Introduction 7050-T7451 aluminum alloys are widely used as important structural materials in aerospace due to their excellent mechanical properties [1,2].
International Journal of Fatigue. 31 (2009) 11-12
International Journal of Fatigue, 66 (2014) 55-64
Materials Science and Engineering A, 527 (2010) 699-707
Materials Science and Engineering, 528 (2011) 3823-3828

FGM eliminates the macro interface in traditional hierarchical composite materials, so it can be used to achieve some specific function[1].
In general, the design guideline of the FGM is to choose two materials with different properties, and continuously change the composition or structure of the two materials with a certain pattern, which makes the FGM physical parameter to change follow the corresponding pattern along a certain direction.
In this paper, we select two materials as given in Table 1 to form the FGM.
Acknowledgements Supported by National Natural Science Foundation of China.
Batra: Composite Structures Vol. 80 (2007), p.539 [3] Huiw ZH and Xianj Zh: Journal of Southwest China Normal University Vol. 27 (2002), p.788 [4] Sang Hyuk and Duck Jong Suh: Polymer Vol.27 (1995), p.310 [5] Helmers L: Mater Sci Eng Vol. 80 (2007), p.539 [6] Loy C T and Lam K Y: International Journal of Mechanical Sciences, Vol.41 (1999), p.309 [7] Fan ZH and Qijin ZH: Polymer Bulletin Vol.1 (2000), p.33 [8] X H Wang and Li D P: Materials Science Forum Vol.42 (2003), p.341 [9] Mathematica official website, http://www.wolfram.com/mathematica/, 2012.

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 232(15), (2018) 2711-2722
The advances of tribology in materials and energy conservation and engineering innovation.
EDP Sciences, (2023) p. 01014
Tribology in materials processing.
Journal of Materials Processing Technology, 48(1-4), (1995) 503-515

The effect of ionization radiation on the optical materials is promising in the radiation science and air and space science.
CIGS thin films are I-III-VI2 chalcopyrite semi-conductor materials which have a high absorption coefficient, low mass and flexibility.
Brunel, Solar Energy Materials Sol.Cells. 59 (1999) [12] M.
Davis, Electronic processes in non-crystalline materials, 2nd edn.
Cimenoglu, Journal of Sol-Gel Science Technology No. 6, Springer (2013), p. 620–627

We conduct a comparison between these two materials and another three materials, namely Commercial Steel bar, Aluminum 3105-H18, and PEP.
Both materials mechanical properties are also shown in Table 1 below.
Table 1: Material properties of the bumper beam materials.
Elsevier Applied Science Publishers, New York 1984
Pothen, Energy Dissipation in Braced Cylindrical Shells, International Journal of Mechanical Science, 30 (3/4), pp. 203-216 1988

Zhang: Materials Science Forum Vol. 723 (2013), p. 258 [11] Y.
Jiang: Materials Science Forum Vol. 628-629 (2009), p. 465 [14] Y.H.
Journal of Refractory Metals and Hard Materials Vol. 28 (2010), p. 330 [16] A.
Medri and S.Guicciardi: Applied Physics A-Materials Science and Processing Vol. 81 (2005), p. 1045 [17] S.
Zhang: Materials Science Forum Vol. 697-698 (2012), p. 142 [19] G.M.

Journal of Hazardous materials, 128(2-3), pp.289-293
Journal of hazardous materials, 117(2-3), pp.227-233
Journal of hazardous materials, 136(3), pp.681-689
Journal of hazardous materials, 186(1), pp.863-868
Journal of hazardous materials, 154(1-3), pp.88-95