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Evaluation of Hard Materials Using Eco-Attributes Md.
Eco-attributes of some selected hard materials.
Categories of hard materials in terms of eco-attributes.
Categories Reasons Position of Hard Materials used in this study (based on the results in Figs. 3-4) A Close to idea materials Alumina based hard materials B Some cases close to ideal materials some cases not Zirconia based hard materials Silicon Carbide based hard materials C Relatively far from ideal materials Boron Nitride based hard materials D Mostly far from the ideal materials Boron Carbide based hard materials Sensitivity Analysis An obvious question is that, what if the membership functions of the linguistic classes (fuzzy numbers) in Table 1 are defined differently?
The environmental impact of Boron Nitride based materials remains between that of Zirconia and Boron Nitride based materials

[2] Xiaoyan Song, Bowen Cheng: Journal of composite materials, Vol. (5)2010, p. 29-35
[3] Jichun Liu, Mengyue Fu, Qingyuan Li: Journal of composite materials, Vol. (29)2012, p.9-18
[5] Yan Gao, Shanhua Zhou: Journal of east China university of science and technology, Vol. (32)2006, p. 1201-1205
[9] Hai Huang: Journal of Applied Polymer Science, Vol. (78)2000, p. 1233-1238
[10] Hongwen Zhang, Yan Jiang, Yongquan Dong: Journal of Applied Polymer Science, Vol. (102)2006, p. 3919-3926

The disadvantage of ceramic materials is that it is heavy even though it is still currently being used.
Recycled materials have much to offer, especially those that are derived from material with the desirable properties such as titanium.
Starley: Journal of Archaeological Science Vol. 26 (1996), p.1127 [2] J.S.
Xia: Journal of Material Science Vol. 45 (2010), p.4606
Samsuri: Materials & Design Vol. 29 (2008), p.1353.

· Used for toxic or dangerous materials. · Plastic bag with layers for materials prevention, i.e. for food, liquid and drug
Science. 347 (6223), 768-771
New York: Nova Science Publishers, Inc
Advanced Materials Research, 1119, 821-827
Materials Case Study 4: Plastics.

Materials and Design 64 (2014) 294 - 300
Journal of Composite Materials 24 (1990) 536 - 558
Materials Letters 64 (2010) 2742 - 2744
Journal of Aeronautical Materials, 26 (2006) 119 - 122
Journal of Functional materials, 10 (2007) 1723 - 1726

AI-VCR Computational Research on Visibility of 3D Materials Solids Reality Pictures Qiusun Ye Dept. of Mathematics and Computer Science Engineering, Wuyi University Wuyishan 354300, Fujian, P.R. of China qsye2005@yahoo.com.cn Keywords: Showing plane; sighting plane; visibility; 3D Materials solids; VCR(Variable Carrying Rules); AI(Artificial Intelligence).
Preface The Distinguishing of 3D (Dimensions) materials solid reality pictures, it is inevitable outcome of depth researches on distinguishing 2D materials solid reality pictures, in the mean time; it is also an important branch of researching CV(Computer Vision).
In actual fact, the greater part of distinguishing work would be done by 2D materials modeling of mathematics.
The parts materials surfaces visibilities of complex 3D solid are properties of both dispersal and continuation.
The Generation and Shadow Display of Graphics for Objects of Axial Symmetry, Journal of Computer Aided Design & Graphics, 1990(1) [12] Yao Kangrong.

Study on Al-BiCl3-Hydride Composites Hydrogen Generation Materials Yu-long Shao, Li-xian Suna, Fen Xub, Yong-Jin Zou and Hai-Liang Chu Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, P.
By hydrogen generation materials, field hydrogen generation would help to reduce links of hydrogen storage and transport[3].
Wang, Research of hydrogen generation by the reaction of Al-based materials with water, Journal of Power Sources, 2013, 222, 188-195
Sun, Studies on hydrogen generation characteristics of hydrolysis of the ball milling Al-based materials in pure water, International Journal of Hydrogen Energy, 2007, 32, (14), 2809-2815
Zhou: Preparation and Hydrogen Generation for Al-LiBH4 Composite Materials.

However, the SiO2, A12O3, Ni, S, etc. are the components of the ferro-matrix friction materials.
Finally, the powders of materials investigated were mixed in the ball mill at 400 r/min for 0.5 h.
Materials Letters, 2003, 57(21): 3175-3181
Journal of Sichuan University (Engineering Science Edition), 2012, 44(4):191-196
Materials for Mechanical Engineering, 2003, 27(10): 11-13

The Material point method has many advantages in solving explosion/impact problems involved multiple materials in comparison with the finite element method or finite difference method, because it takes advantage of both Eulerian and Lagrangian schemes, so that mesh tangling is avoided while material variables are tracked through the complete deformation history, and no slip impact is handled automatically without any special contact algorithm [5] .
Materials Science & Engineering, Vol. 20(2002), p. 31-33
A particle method for history-dependent materials, Comput.
Journal of south china university of technology, Vol.32(2004), p. 87-91
Journal of Applied Physics.

So temperature has a very important effect on the properties of materials [10].
Materials and methods Materials.
Due to different materials with different melting points, when the materials are changed the mathematical models should be changed.
Yung and Yan Xu: Journal of Materials Processing Technology 117 (2001), pp.21-27
Lau: Journal of Materials Processing Technology 139 (2003), pp.170-177