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In the future, more areas would be explored to optimize the control of cognitive load in virtual maintenance training such as the training materials, more scientific measurement methods.
Gu: Journal of System Simulation, Vol. 18 (2006) 8, p.2195.
Dou: Journal of the Academy of Equipment Command & Technology.
Sweller: Journal of Educational Psychology, Vol. 88 (1996), p.49
Stanton: Issues in Ergonomics Science, Vol. 3 (2002) No. 2, p.178

Bennett 1, b * 1 Nano-Materials Lab., Institute of Mechanical, Process & Energy Engineering, School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom a nmw30@hw.ac.uk, b n.bennett@hw.ac.uk Keywords: thermoelectric; silicon; thermal conductivity; thin-film; vacancy Abstract.
Compared to other materials, highly-doped Si has a large PF, but this is outweighed by high k, meaning that ZT is poor for bulk Si (ZT ~ 0.01 at 300 K [1]), about 100-fold worse than for popular TE materials such as bismuth telluride (ZT ~ 1).
Heath, Silicon nanowires as efficient thermoelectric materials, Nature 451 (2008) 168–171
Materials Science and Engineering R 67 (2010) 19-63
Journal of Physics: Conference Series 265 (2011) 012001.

This rectangle is called basal cell element, when all honeycomb core is regarded as well-proportioned and solid materials, this rectangle is called equivalent element.
Models of deducing , of honeycomb core cells 2.1 Modulus of Elasticity and Poisson ratio It is assumed that equivalent homogenized material is in uniaxial tensile loading condition.
[6] Wang F, Zhuang S B: Chinese Journal of Theoretical and Applied Mechanics, 2002,34(6)
[7] Xia L J, Jin X D, Wang Y B: Journal of Shanghai Jiaotong University, 2003,37(7)
[9] Kim H S: International Journal of Mechanical Sciences, 2001,43:1027-1060.

Introduction By virtue of its close resemblance to natural bone mineral and tooth enamel, hydroxyapatite (Ca10(PO4)6(OH)2, HA) has become a key bioceramic which has attracted significant interest in both materials research and clinical applications.
Materials and Methods Three types of HA powder were sintered in this study, namely, micro-spheres (MS, Fluidinova, Portugal), nano-rods (NR, Nanjing Emperor Nano Materials, China) and nano-spheres (NS, Sigma-Aldrich, US).
Mehta, In vivo evaluation of titanium oxide and hydroxyapatite as an artificial cornea skirt, Journal of Materials Science: Materials in Medicine. 23 (2012) 1063-1072
Mendelson, Average grain size in polycrystalline ceramics, Journal of the American Ceramic Society. 52 (1969) 443-446
Bruggen, Transparent alumina: a light‐scattering model, Journal of the American Ceramic Society. 86 (2003) 480-486

Thank professor Fengzhen Liu in Collage of Materials Science and Opto-Electronic Eechnology of GUCAS for helping us test the IPCE of solar cells.
CC, et al.: Materials Science & Engineering R-Reports Vol.70 (2010), p.92-111
K: Solar Energy Materials and Solar Cells Vol.61 (2000), P.393-402
Zhang: Journal of Functional Materials and Devices, Vol.14 (2008), p. 189-192, in Chinese
S: Journal of Vacuum Science and Technology B Vol.17 (1999), p. 2074-2083

Tungsten oxide is a kind of multifunctional materials with excellent properties for gas sensing, electrochromic and photocatalytic applications.
Introduction Tungsten oxide is a type of attractive materials for hydrogen sensing for its high selectivity and sensitivity [1,2].
Therefore, controlling the nanostructure of the materials is of great importance to improve sensing performance [3].
In addition, the easy transformation between different phases is versatile to build other quasi-2D materials, which are attractive in relevant applications.
Shen: Journal of Materials Chemistry Vol.22(2012), p.19904

These are due to the realization of a chemical metallurgy linking between diamonds and bonded materials.
Acknowledgements This research is supported by Grant No.50475040 from the National Natural Science Foundation of China and No. 03H52066 from China Aeronautics Science Foundation.
Xu and et al: Chinese Journal of Mechanical Engineering, Vol.41 (2005) No.3, pp.12
Takata and et al: J. of Porous Materials Vol.4 (1997), pp. 187 [5] S.H.
Xiao and et al: Key Engineering Materials, Vol.259-260 (2004), pp.151.

The large scattering of the measured values reflected the inhomogeneity of the materials.
MicroVickers hardness tests results reflected to a significant inhomogeneity of the materials.
Acknowledgement Authors express their thanks for the test materials to the Slovak Academy of Sciences, Department of Structural Ceramics, Bratislava, for accomplishing the SEM investigations to the Slovak Academy of Sciences, Institute of Materials Sciences, Department of Ceramics, Kosice and for the valuable professional and technical aid to Department of Solid State Physics, ELTE, Hungary.
Riedel: Designing of Si3N4/SiC composite materials, Nanostructured Materials,Volume 6, Issues 1-4,1995, Pages 279-282
[9] Standard test method for microindentation hardness of materials ASTM E 384, 1999

These materials have significant mechanical, electrical and thermal properties [1, 2].
Bedia, “The mechanical properties of Zigzag carbon nanotube using the energy‒equivalent model”, Journal of Chemistry and Materials Research, Vol. 3, (2015),pp. 9–14,
Mechanics of Composite Materials, (2018), 1-10
Mechanics of Composite Materials, 52(4), (2016), 555-568
[42] He, J.H., "Homotopy perturbation method for bifurcation of nonlinear problems, " International Journal of Nonlinear Sciences and Numerical Simulation. 6 (2) (2005) 207–208

In general, Metal oxide materials were widely used as the functional element which have capabilities to detect various types of gases.
Judith, ZnO–nanostructures, defects, and devices, Materials today 10.5 (2007): 40-48
Maheshwar, Enhanced photocatalytic activity of highly porous ZnO thin films prepared by sol–gel process, Materials chemistry and physics 76.1 (2002): 82-87
[6] U.Ozgur et al., A comprehensive review of ZnO materials and devices, Journal of applied physics 98.4 (2005): 041301-041301
Magnus, Study of the piezoelectric power generation arrays grown by different methods, Advanced Functional Materials, 2010, xx,1-6, DOI: 10.1002/adfm.201001203