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Resource is one of the basic materials of economic development and resource shortages will directly affect economic growth and social progress.
Journal of Political Economy, 1990, 98(5): 71- 102
Journal of Monetary Economics,1988, 22 (1): 3- 42
[8] Ziarko W..A variable precision rough set model[J].Journal of Computer and System Sciences,1993.46:39-59
International Journal of Information and Computer Science,1982, 11(5):341-356

Materials and Methods Materials.
Journal of Environmental Sciences.
Journal of Environmental Science.
Journal of Hazardous Materials.
Journal of Hazardous Materials.

Experimental Section Materials.
Li; et al, Journal of Applied Polymer Science, Vol. 969(6), 2005, p.2163 [5] M.
Mizoshita, et al, Advanced Materials, Vol. 15(16), 2003, p.1335 [6] M.
Akashi, Journal of Applied Polymer Science, Vol. 102(6), 2006, p.5351 [8] H.
Chemistry of Materials, Vol. 5(2), 1993, p.229

This is due to the comparative analysis in both materials hardness values.
Science and Society.
International Journal of Scientific Research in Computer Science, Engineering and Information Technology. 2017 IJSRCSEIT | Volume 2 | Issue 3 | ISSN : 2456-3307
[5] Chen Q, Li D, Computer simulation of solid-particle erosion of composite materials.
Raw Materials and Circular Economy.

In the literature various waste materials (eco-sustainable material) with good mechanical properties can effectively be used as alternative to the traditional materials, which is a step towards sustainability [4].
Materials and Methods Design of Artificial Lightweight Aggregates.
Journal of Cleaner Production, 2020. 276: p. 124316
[14] Colangelo, F., et al., Innovative Materials in Italy for Eco-Friendly and Sustainable Buildings.
Materials (Basel), 2021. 14(8): p. 2048

The Development Trend of the Electromechanical Integration The purpose of electromechanical integration is to make the product be provided with multiple functions, high efficiency, high intelligence and high reliability, while saving materials and energy, and product developing in the light, thin, thin, small, clever direction, so as to continue satisfy the diversification requirements of the people's lives and labor-saving automation needs of production.
With the science and technology development and social progress, the application of electromechanical integration technology will be more widely; the progress of science and technology creates conditions for the emergence and development of electromechanical integration and the demand of society provides impetus.
In turn, the development of electromechanical integration continually promotes the progress of science and technology and the demand of society.
Beijing: Science Press, 2004
Journal of Vocational University, 2009, (4).

Therefore, there is considerable interest in developing alternative electrode materials with a highly porous structure.
A schematic design of a miniaturised fuel cell using different electrode materials is illustrated in Fig. 1.
The OCPs of three electrode materials exhibited relatively similar value of 1.1 V while a significant change in the power density generated was obtained from different electrode materials.
Xue, Preparation of a porous conducting polymer film by electrochemical synthesis, Journal of Applied Polymer Science, 91 (2004) 303-307
Derek, An investigation into polypyrrole-coated 316L stainless steel as a bipolar plate material for PEM fuel cells, Journal of Power Sources, 163 (2006) 500-508.

Results have shown that the introduction of rubber particles significantly increases the strain capacity of the materials[5].
Material and methods Raw materials.
[2] Mohammadmehdi Choolaei, Ali Morad Rashidi, Mehdi Ardjmand, The effect of nanosilica on the physical properties of oil well cement, Materials Science and Engineering A. 538(2012) 288-294
[15] Jun Wang, Baoliang Chen, Adsorption and coadsorption of organic pollutants and a heavy metal by graphene oxide and reduced graphene materials, Chemical Engineering Journal. 281(2015) 379-388
[16] Er-fan Chen, Dong Chen, The development of whisker-reinforced polymer composites mechanisms, Polymer Materials Science and Engineering. 22(2006) 20-24

TABLE 2 SURFACE TENSILE OF MATERIALS[12] Metals （N/m-1） Sn 0.55 Ag 0.93 Cu 1.35 Pr 0.68 Surface tension reflects the strength of appealling to the atom of materials, and it is one of the inherent properties of materials.
Journal of Materials Science: Materials In Electronics, (2010)910-916
Materials Characterization, 59(2008)1364-1368
Journal of Materials Science: Materials In Electronics, 21(2010)643-648
Journal of Electronic Materials, 37(2008)2-8

Xu, et al, International Journal of Machine Tool & Manufacture.
[4] Shuyun Jiang, Shufei Zheng, Journal of Machine Tools and Manufacture.
To: Journal of Materials Processing Technology.
Cheung: International Journal of Mechanical Sciences.
[7] Pengqiang Fu, Qiang Zhang, Feihu Zhang, Key Engineering Materials.