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P Wave Propagation in the Functionally Graded Materials Ligang Zhang1, a, Hong Zhu2, b, Hongbiao Xie1, c and Lin Yuan2, d 1National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China 2School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China azlg@ysu.edu.cn, bzhuhong9@126.com, chbx@ysu.edu.cn, dinfo@ysu.edu.cn Keywords: P Wave; Functionally graded materials; Wave velocity; Wave amplitude; Differential equation with varied coefficient Abstract.
The P wave propagation in the functionally graded materials (FGM) is studied.
(Science Press, China 2002)
Wu: Chinese Journal of Computational Mechanics.
Lam: Journal of Sound and Vibration Vol. 236(2000), p. 307 [6] Z.

Introduction The active development of materials science has led to the appearance of new polymer binders types with increased rheological and strength indicators and composite materials based on them.
Environmental impact of food packaging materials: A review of contemporary development from conventional plastics to polylactic acid based materials, Materials. 13(21) (2020) 4994
Safin, Study of the destructive properties of biodegradable wood-filled composite material,Materials Science Forum. 992 (2020) 290-295
Shaikhutdinova, Research of biodegradable wood completed composite materials based on polylactide, Journal of Physics: Conference Series. 1399(4) (2019) 044117
Voronin, Analysis of physico-mechanical properties of composites based on polylactide and thermally modified wood fibers, Materials Science Forum. 870 (2016) 202-206.

However, social and economic development is supported by a large number of various types of raw materials.
Therefore, the resource-saving and environment friendly development of materials and their industry has becoming the material foundation for sustainable development of social and economic, eco-materials are also researched and universally applied, and project investment of eco-materials is gradually increasing.
Consequently, the model helps to disperse and control investment risk of eco-materials indurstry, and then advance the success rate of eco-materials indurstry investment.
Institute of Computer Science Warsaw University of Technology. 1993 [7] R.
International Journal of Pattern Recognization and artificial intelligence. 2005, 5: 663-680

Applied Model of Magnetization of a Granulated Material SANDULYAK Anna1a, SANDULYAK Alexander2b, ORESHKIN Dmitry2c, POPOVA Marina2d 1 PhD in Technical Sciences, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoye chaussee, Moscow, 129337 Russian Federation, 2professor, MGSU aanna.sandulyak@mail.ru, ba.sandulyak@mail.ru, cdmitrii_oreshkin@mail.ru, dpopovaMN@mgsu.ru Keywords: Granulated ferromagnetic material; Magnetic permeability; Intensity of magnetic field Abstract.
Introduction By using of porous magnetic materials (for example, in magnetic separators, filters) the working element of which is magnetized granulated material with system of branched porous [1-4], one of the important task is to obtain the information about field parameters within porous, between grains, the intensity h in particular.
Li: Micro-macro quantification of the internal structure of granular materials/ Journal of Engineering Mechanics (2009).
Matijevic: Magnetic filtration of submicroscopic particles through a packed bed of spheres / Journal of Applied Physics (1985).
Mucha: A magnetic filter with permanent magnets on the basis of rare earth / Journal of Magnetism and Magnetic Materials (2004).

First-Principles Calculation of Intermetallics on Novel Anode Materials Jin ZHANG1,a, Pei-xian ZHU1,b, Sheng-gang ZHOU1 and Jia-xin GUO1 1Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China azhangjin819@hotmail.com, bzhu_pei_xian@163.com, Keywords: Sandwich structure, composite materials, diffusion sintering with pressing in vacuum, intermetallic compounds, first-principles calculation.
Our team proposes the design concept of layered composite electrode materials.
So we propose the design concept of layered composite electrode materials.
Computational Materials Science, 50(2011),p.1467-1476
Materials Science&Technology, 15(2007), p.47-51

Kang 2 1 Henan Institute of Science and Technology, Xinxiang 453003, P.
Acknowledgements The authors acknowledge the financial support of the National Nature Science Foundation of China in Major Project Program （No.50390061）, the Scientific Research Foundation of Henan Institute of Science and Technology for High Level Scholar and the Research Project program of Natural science of the Education Department of Henan Provice(2008B460007).
Tsai: International Journal of Machine Tools & Manufacture, Vol. 40(2000), p.1651-1669
Moudgil.: Journal of Colloid and interfaces Science, 2003,Vol.263, Issue 2(2003), p.506-511
Chen, Li-Sheng Shu, Shah-Rong Lee: Journal of Materials Processing Technology, 2003, Vol. 140, Issue 2, p. 373- 378.

Science and Engineering of Composite Materials, 23(2016): 453-460
International Journal of Mechanical Sciences, 122(2017): 1-17
International Journal of Mechanical Sciences, 110(2016): 160-169
Analysis of thin-walled open-section beams with functionally graded materials.
Materials and Design, 116(2017): 656-665.

Journal of Functional Materials and Devices, 2010 16 (3) 222-226
[6] Liu Rui, WANG Hong, Li XuePing, et al., A micro-tensile method for measuring mechanical Properties of MEMS materials, Journal of Micromechanics and Micro engineering. 18 (2008) 065002 [7] Liu Rui, Study Of Mechanical Properties of Micro-Scale Materials by Micro-Tensile System and Method, Shanghai Jiao Tong University, 2009
High strength and high ductility of electrodeposited nanocrystalline Ni with a broad grain size distribution, Materials Science and Engineering: A. 487 (2008) 410-416
Journal of Electrochemical Society. 153 (2006) 155-161
Materials Science and Engineering: A, Volumes 319–321 (2001) 882-886

Determination of Weight Values for Assessment Indexes of Engineering Materials based on Fuzzy Pairwise Comparison Method Li Min, Ma Yujun (School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China) Limin7565@yahoo.com.cn Keywords: Fuzzy, Pairwise comparison, Engineering materials, Weight Abstract.
For example, Huang[3] evaluate the structural state of subway tunnel in operation by expert scoring system, and Zhang[1] uses analytical hierarchy process to determine the weight values for assessing engineering materials, etc.
Determination of weighting values for assessment indexes of engineering materials based on analytic hierarchy procedure[J].
Journal of Lanzhou University of Technology, Vol.33(2) (2007), p.17-19
Journal of Jianghan University (natural sciences), Vol.32(4) (2004), p.63-65

In refractory, forsterite is considered as one of the most efficient materials for critical production stages of modern iron and steel industry, namely, steelmaking and casting or ladle metallurgy [5-10].
Experimental Natural forsterite powders (44 μm, Yichang, China) and Na2CO3 (99.8% purity, AR) were used as raw materials.
Francis: Journal of Alloys and Compounds Vol. 113-115 (2010), p. 495 [5] R.
Markina: Aiche Journal Vol. 2832–2836 (11A) (1997), p. 43 [8] M.
West: Material Science and Technology Vol. 863–869 (9) (1995), p. 11 [10] Emad Mustafa, Nagy Khalil and Atef Gamal: Ceramics International Vol. 663–667 (2002), p. 28