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Materials and Method Materials.
Xu: Recycling of non-metallic fractions from waste printed circuit boards: A review, Journal of Hazardous Materials, Vol. 168 (2009) No.2, p.567-590 [5] J.
Huang: WEEE recovery strategies and the WEEE treatment status in China, Journal of Hazardous Materials, Vol. 136 (2006) No.3, p.502-512 [7] H.M.
Huang: Sound absorption characteristics of polymer microparticles, Journal of Applied Polymer Science, Vol. 101 (2006) No.4, p.2675-2679 [18] B.
Huang: A novel impedance matching material derived from polymer micro-particles, Journal of Materials Science, Vol. 42 (2007) No.1, p.199-206 [19] Z.

Introduction The application area of composite materials is growing.
It is requires more and more accurate design methods and mathematical models of materials.
Mechanics of Composite Materials.
Materials Research Society Symposium Proceedings.
Chislennoe modelirovanie kompozitsionnykh materialov s mnogourovnevoi strukturoi [Numerical modeling of composite materials with a multilevel structure].Proceedings of the Russian Academy of Sciences.

For the prediction of elastic modulus and loss factor properties of materials are taken from [7].
Fiber orientation has considerable effect on damping of composite materials.
Loss factors of materials decreases with Increase of ramp rate of measuring temperature.
Curing temperature of materials has also significant effect on elastic moduli and loss factors of composite materials.
Kumar: Investigation of Damping in Fiber Reinforced Composite Materials, Ph D Thesis 2009.

Journal of Materials Processing Technology,2004,149: 616-622
Journal of Materials Processing Technology, 2003, 140:314-317
Journal of Materials Processing Technology, 2006,172(l):77-87
Journal of Materials Processing Technology, 2005,170:516-523
Journal of Materials Processing Technology, 2003,140:368-372

Third, they should find additional materials to support the teaching materials and get students interested.
Therefore, the teachers’ skill in “enriching teaching materials” needs to be improved quickly.
For instance, the Core English of Shanghai Jiao Tong University and the English reading materials included in “Construction Plan of Network-based Remote Teaching System in the New Century” recommended by the State Council are excellent teaching materials.
The contents of all-English teaching materials vary according to different majors.
North University of China Journal 2005, (2)

The role of polypropylene microfiber materials (PMM) in the degradation of MG under UV irradiation was studied.
Experimental Part Methods and Materials.
Perones, General chemistry, Science, Moscow, 1979
Demkov, The use of synthetic materials for deep wastewater treatment by filtration, Fact, Kharkov, 2004
Pinchuk, Multifunctional filters based on polymers, Technological equipment and materials 3 (1998) 115-120

Even the dynamic experimental techniques is available later, most of which for high-rate properties of engineering materials are not adequate to determine the dynamic mechanical responses of rubbers.
Silly : European Polymer Journal, Vol 37 (2001) , p. 85–91 [3] Chang W; Zhang Y, Cai l: Journal of Materials Engineering, Vol. 9(1995), p. 11–13
[13] Song B, Chen W: Journal of Engineering Materials and Technology, Vol. 125(2003), p. 294–301 [14] Guo W: Journal of Experimental Mechanics (2006), p. 447–452
[15] Li Z, John Lambros: Composites Science and Technology (1999), p. 1097–1107
Bassim: Journal of Materials Processing Technology (2004), p. 1889–1892

Third, group of quasi-brittle materials like plain concrete, reinforced concrete, prestressed concrete or fiber reinforced concrete and other materials with cementitious matrix.
Fig.3 FPZ for materials with different response to tensile stress.
In proceeding: Applied Research in Materials and Mechanics Engineering.
Fracture and Size Effect in Concrete and Other Quasi-brittle materials.
Computational Materials Science, Vol. 91 (2014), p. 102-121, ISSN: 0927-0256, http://dx.doi.org/10.1016/j.commatsci.2014.04.006 [26] J.

By means of an electronic balance and SEM, the material transfer values of the PtIr contact materials and the characteristics of contact material surface profile are obtained and analyzed.
But the researches mainly focus on silver-based electrical contact materials.
Surface morphology of sample 3 contact materials after 10000 operations A.
[2] Zhang Kunhua, Guan Weimin, Sun Jialin et al, Preparation and DC arc erosion morphology of AgSnO2 contact materials, Rare Metal Materials and Engineering. 34 (2005) 924-927
[3] Ren Junjie, Wan Wenjiang, Rong Mingzhe , Arc erosion morphology of AgMeO contact materials, Electric Engineering. 5 (1997) 9-12 [4] Guo Fengyi, Wang Guoqiang, Dong Na et al, The arc erosive characteristics and crack formation mechanics analysis of silver-based contact materials, Proceeding of CSEE. 24 (2004) 209-217 [5] Jing Li, Zhi-ying Ma, Research on arc erosion of silver-based alloy contact materials under low voltage resistive load and small current at 400 Hz and 50 Hz, Academic Journal of Xi’an Jiaotong University. 3 (2009) 149-154

Materials and Methods Adsorbent was prepared as follows: Fresh cucumber was purchased from the local market and peeled it; the peel was washed with tap water for three times followed by distilled water three times.
Das, Linearised and nonlinearised isotherm models optimization analysis by error functions and statistical means, Journal of Environmental Health Science and Engineering, 12 (2014) 1-6
Journal of dispersion science and technology, 34(10) (2013), 1295-1307
International journal of environmental science and technology, 16(1) (2019), 237-248
Journal of Dispersion Science and Technology, 38(3) (2017), 381-392.