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The development of knowledge graphs in the materials science domain is currently under consideration with regard to the reusing the upper-level ontologies and materials standards.
[2] Himanen, L., et al., Data‐driven materials science: status, challenges, and perspectives.
[5] Bayerlein, B., et al., A Perspective on Digital Knowledge Representation in Materials Science and Engineering.
Data Science Journal, 2010. 9: p. 54-61.DOI: 10.2481/dsj.008-041
Data Science Journal, 2006. 5: p. 52-63.DOI: 10.2481/dsj.5.52

Materials and Methods Materials The materials (mesome mulberries) were obtained from the Mulberry germplasm resources garden of Southwestern University, and parts (unpruned wild mulberries) were obtained from field studies.
The materials for studying palynology of Chinese Morus No.
The 25 materials were divided into 10 categories as shown in Figure 1.
Journal of Plant Taxonomy. 17, pp.1-5
Journal of Zhejiang University.

Materials and experimental procedures The composition of the experimental steel microalloyed with Nb is shown in Table 1.
Acknowledgements This work is financially supported by National Natural Science Foundation and Baoshan Iron & Steel Group Co.
(No.50271015) References [1] Pingguang Xu, Bingzhe Bai and Hongsheng Fang: Journal of University of Science and Technology Beijing.
Krauss and S.W.Thompson: ISIJ International Vol.35 (1995), p. 937-945 [3] M.Niikura, M.Fujioka and Y.Adachi: Journal of Materials Technology Vol.117 (2001), p.341 [4] Mingchun Zhao, Ke Yang and Yiying Shan: Materials Science and Engineering Vol.A355 (2002), p. 14-20 [5] Jinbo Qu and Yiyin Shan: Journal of Iron and Steel Research, Vol.13 (2001), p. 43-47 [6] Dong Han, Sun Xinjun and Liu Qingyou: Iron and Steel, Vol.38 (2003), p. 56-66

Experiment Materials.
TFE-P copolymer (grade FE2701, product of Shanghai 3F New Material Co., Ltd., Shanghai, China).
European Polymer Journal, Vol. 35(1999):P. 743
[2] John Wiley, Sona.: submitted to Journal of Polymer Science, Vol. 4(1993)
Polymer Materials Science & Engineering Vol. 15(1999), P. 83.

Modeling of lifetime distribution in a multicrystalline silicon ingot Yacine Boulfrad1, a, Gaute Stokkan1,b , Mohammed M’hamdi2,c Eivind Øvrelid3,d, Lars Arnberg1,e 1Department of Materials Science and Engineering, Norwegian University of Science and Technology, Alfred Getz v 2b. 7491 Trondheim, Norway. 2SINTEF Materials and Chemistry, Alfred Getz v 2b. 7491Trondheim, Norway. 3SINTEF Materials Technology, 0314 Oslo, Norway ayacine.boulfrad@material.ntnu.no, bgaute.stokkan@material.ntnu.no, cmohammed.mhamdi@sintef.no, deivind.j.ovrelid@sintef.no, earnberg@ntnu.no Keywords: Multicrystalline silicon, ingot, defects, iron, dislocations, lifetime Abstract.
Applied Physics A (Materials Science Processing), 1999.
Applied Physics A: Materials Science & Processing, 2000. 70(5): p. 489-534
Journal of Applied Physics, 2007. 101(5): p. 053515-9
Journal of Applied Physics, 1998. 84(5): p. 2656-2664

These materials are poor electrical conductors.
Yamada: Microporous and Mesoporous Materials Vol. 101 (2007), p. 303 [3] H.
Inagaki: Microporous and Mesoporous Materials Vol. 44-45 (2001), p. 755 [4] S.
Yanagishita: Key Engineering Materials Vol.314 (2006), p. 147 [6] A.
Vleugels: Journal of materials Science Vol. 39 (2004), p.779 [9] H.

However, ceramic materials also have the characteristics of great brittleness, small toughness, poor impact resistance and anti-fatigue performance.
Materials and Manufacturing Processes, Vol. 23(3), (2008), p. 224
Key Engineering Materials, Vol. 359-360, (2008), p. 48
Journal of Materials Processing Technology, Vol. 116(2-3), 2001, p. 165
Journal of Manufacturing Science and Engineering, Vol. 123, (2001), p. 13

A new effective way to reuse sewage sludge is to produce lightweight ceramics, which can be used as construction materials or filter media [5-7].
Materials and methods Raw Materials.
The materials for production of sewage sludge ceramics (SSC) were clay and dried sludge.
After materials released all gases, the residual glassy phase still melted and the most of the inner pores were filled by viscous flow.
Chiou: Journal of Hazardous Materials Vol. 134 (2006) p. 87-93

Materials and experiment Materials.Methacrylic acid(MAA), N,N-methylene-bis-acrylamide (MBA) and potassium persulfate (KPS) were all of analytical grade and obtained from Chengdu Kelong Chemicals Company.
In the small amplitude oscillatory shear, higher G’ indicates higher elasticity or higher entanglement/crosslink degree of the materials.
Acknowledgements The authors are grateful to the Doctoral Fund of Southwest University of Science and Technology (Contract No:10zx7104) and Opening Fund of Engineering Research Center of Biomass Materials of Ministry of Education, Southwest University of Science and Technology(contract no.: 09zxbk01), Mianyang, Sichuan 621010, China.
S., Journal of Applied Polymer Science, (1997)64, 2647–2655
[9] Yao, F., Xu, L.Q., Fu, G.D., Lin, B.P., Macromolecules (2010)43, 9761–9770 [10]Zhang, C., Easteal A., Journal of Applied Polymer Science, (2004)91, 3625-3641.

As a special kind of engineering material, the mechanical properties and failure characteristics of rock directly determine the safety of the engineering works.
Chinese Journal of Geotechnical Engineering. 23 (2001) 191-195
Chinese Journal of Rock Mechanics and Engineering. 30 (2011) 164-169
International Journal of Rock Mechanics and Mining Sciences. 42 (2005) 237-250
Journal of Volcanology and Geothermal Research. 107 (2001) 1-18.