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Journal of Refractory Metals & Hard Materials, 27 (2009), 288–299 [3] X.
Journal of Refractory Metals & Hard Materials, 2013, Vol. 36, p.46-51 [4] I.
International Journal of Refractory Metals and Hard Materials, 2018, volume 71, p. 357-365
Journal of Refractory Metals and Hard Materials 36 (2013), p. 2–9
International journal of refractory metals . hard materials International Journal of Refractory Metals & Hard Materials, 62 (2017) 134-148

Bera2,b 1Department of Physics , National Institute of Technology, Silchar Assam, India 2Department of Material Sciences, S.N.B.
Introduction Multiferroic materials that combine spontaneous magnetization with spontaneous polarization have recently attracted a surge of attention.
However, the toxicity of lead has raised concerns and more environmentally friendly lead-free piezoelectric materials are in urgent demand.
Macdonald, “Impedance Spectroscopy: Emphasizing Solid Materials and Systems,” John Wiley & Sons, New York, 1987, pp. 191-316
Hirose, “Characterization of Electrical Materials, Especially Ferroelectrics, by Impedance Spectroscopy,” Journal of Electroceramics, vol. 1, 1997, pp. 65-71

The main theoretical results were obtained by using approaches based on classical methods of calculating machine parts, theory of machines and mechanisms, tribology and triboengineering, kinetic theory of fracture of materials.
A work-piece is a gear wheel of 20 mm module, material – 40ХМ.
Thus, the use of modern tool materials allows implementing a fundamentally new technology for gear wheels milling by using a form-generating method [18 – 24].
Simultaneously with the change of tool materials and application of wear-resistant coatings, the design of modern hob cutters was also changed, so they had an extended working section length compared to standard cutters.
Egorov, Educational and methodical complex - a center of high-tech equipment with cnc and technological preparation of production, Scientific Journal Modern problems of science and education. 3 (2014)

The material used for this study is a 2024-T351 aluminum alloy (Al base, 4.46% Cu, 1.44% Mg, 0.60% Mn and 0.13 wt % Fe) provided by Airbus Group (France).
Air Force Aircraft,Commission on Engineering and Technical Systems, National Materials Advisory Board, Division on Engineering and Physical Sciences, National Research Council.
DeMichelis, Mechanism of intergranular corrosion of Al-Cu alloys, Corrosion Science. 10 (1970) 795
Hlava, The electrochemical characteristics of bulk-synthetized Al2CuMg, Journal of the Electrochemical Society. 146 (1999) 4424
Frankel, Localized Corrosion Growth Kinetics in AA2024 Alloys, Journal of the Electrochemical Society. 149 (2002) B510

Silver-Doped Apatite as a Bioactive and an Antimicrobial Bone Material E.S.
Materials and Methods nAgHA containing 0.7 (Ag1), 1.6 (Ag2) and 12.4 (Ag3) wt.% Ag were synthesised based on a wet precipitation reaction at room temperature between calcium phosphate and orthophosphoric acid.
Jansen, Calcium phosphate coatings for medical implants, Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 212 (1998) 137-147
Gristina, Biomaterial-centered infection: microbial adhesion versus tissue integration, Science 237 (1987) 1588-1595
Kim, A mechanistic study of the antibacterial effect of silver ions on Escherichia coli and Staphylococcus aureus, Journal of Biomedical Materials Research 52 (2000) 662-668.

The caisson is composed of ceramsite box, three matrix materials (medical stone, limestone and ceramic) were installed, four kinds of plants (Ceratophyllum demersum, Myriophyllum verticillatum, Cyperus alternifolius and Iris pseudacorus) were planted.
Environmental Science & Technology, 2007, 30(4):4-6.
Environmental Science & Technology, 2009, 32(6):53-58.
Journal of Heilongjiang Bayi Agricultural University, 2008, 12:19-22.
Journal of Shenyang Jianzhu University (Natural Science), 2006, 22(6):985-988.

They are used to simulate the diffusion process in many important applications in sciences, such as chemistry, heat and mass transfer, biology and ecology.
Atsumi, Hydrogen bulk retention in graphite and kinetics of diffusion, Journal of Nuclear Materials, 307 n.2 (2002) 1466–1470
Vecchi, Optimization by Simulated Annealing, Science, 220 (1983) 671-680
Hoeng, Generalized Simulated Annealing for Global Optimization: The GenSA Package, The R Journal, 5 n.1. (2013) 13-28. https://journal.r-project.org/archive/2013/RJ-2013-002/RJ-2013-002.pdf
Inverse Problems in Science and Engineering, 16 n. 8 (2008). https://doi.org/10.1080/17415970802082864

Introduction Considerable amount of work has been devoted to identify and quantify contaminants in paper (board) for food packaging, particularly containing recycled fiber.Much less effort has been dedicated to predictive migration models for fiber-based materials in contact with food.
Materials and Methods Materials.
Demertzis: Journal of Chromatography A, vol. 1077(2005), p. 74 [10] L.
Katan: Migration from Food Contact Materials(spen Publishers, Inc., Frederick, Maryland 1996)
[11] Birgit Aurela: [Dissertation], Helsinki, Faculty of Science of the University of Helsinki,2001

It makes the deal between enterprises turns from “original raw materials and product (service) trade” to “raw materials trade, product (service) and carbon emissions trade”.
Acknowledgements This work was financially supported by the National Natural Science Foundation, China (No.71072155) References [1] S.
Weber, “The importance of carbon footprint estimation boundaries,” Environmental Science & Technology, vol.42, 2008 (16), p.5839-5842
Jing-jiang., “Optimal Production Policy with Emission Permits and Trading,” Chinese Journal of Management Science, vol.17, 2009 (3), p.81-86.( In Chinese) [32] J.
Shao-fu, “Optimal emission-dependent production policy with stochastic demand,” International Journal of Society Systems Science, vol.3, 2011 (1-2), p.21-39

A study of Oxalic acid adsorption on the surface of natural mica Meizhen Ke1,a, Qinghua Chen 2,b, Weiming Zhou 1,c, Nan Wu 2.d, Qingrong Qian 2, e, Zhanhui Yuan 3,f, Xiaomin Huang2,g 1 College of Materials Science and Engineering, Fujian Normal University, Fuzhou, China 2 College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, China 3 Fuzhou Kuncai Fine Chemicals Co., Ltd, Fuqing, China a 757412608@qq.com (M Ke), b cqhuar@126.com (Q.
Experimental Raw materials and reagents.
All materials used in the experiments were analytic reagents and without further purification.
Taghavinia: Materials Chemistry and Physics Vol. 107(2008), p. 449
NIE: Journal of Rare Earths Vol. 30(2012), p. 1265 [5] I.