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References: [1].Qian Qi-hu.Some advances in rock blasting dynamics[J].Chinese Journal of Rock Mechanics and Engineering, 2009,28(10):1945-1968
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DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No.
Sun et al, Journal of Applied Physics 111(11), 113527 (2012)
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Zhou et al, Journal of Elec Materi 43, 838-842 (2014)
Cheng et al, Materials Science in Semiconductor Processing 174, 108207 (2024)

The Al2O3+cordierite+AlN composite ceramic has been obtained through such technique procedure as mixing materials, ball-milling, forming by dry pressing and pressutrless sintering in nitrogen at temperature between 1350°C ~ 1400°C.
The microstructure and composition of the fracture of the materials are observed by SEM and EDS.
Considering the electrical conductivity of the lamp holder, its material shall be ceramic materials with good thermal conductivity.
It is the easier to obtain dense microstructure which is advantageous to the heat conduction of composite ceramic when the materials sinter in higher temperature.
Effect of Al2O3 Addition on Preparation and Properties of AlN-Al2O3 Multiphase Ceramics, Journal of synthetic crystals,39(2010)1422-1428

Conclusions Nanoindentation is a technical used in testing mechanical properties of materials.
Mechanical Properties of Ceramic Materials.
(Science Press, Beijing 1987) [2] A.Pechenik, R.K.Kalia and P.Vashishta: Computer-Aided Design of High-Temperature Materials (Oxford University Press, New York, USA 1999)
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CBR value is used as parameter of roadbed soil and pavement material in the current airport flexible pavement design method [2].
China Civil Engineering Journal, 2007
Hubei: Journal of Wuhan University of Technology. 2011 [6] Shuiyou Xie, Chuanchao Zheng.
Journal of Chang an University( natural science edition)
[10] Xudong Wang. material dynamic characteristics and dynamic parametersn of the Asphalt pavement.

The teachers should practice applying image and video materials that are took in practice into courseware, the abstract thinking concrete, so that the student can combine practical engineering and establish perceptual knowledge .
Chinese Journal of Geotechnical Engineering,1999,2(1):2-8 [3] Gao wenhua,Wan wen,Chen qiunan etal.The teaching reformation and practice of soil mechanics.
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Science & technology information,2010,(21):301-302 [5] Zhang yanmei.
Research on teaching methods of soil mechanics in university.Science & technology information,2007,(20):189-190

Introduction To analyze acoustic field is crucial to manufacture the ultrasonic NDT testing process, especially for the materials with complicated structures.
Recently, the ANSYS was utilized to simulate the propagation process for longitudinal wave in the materials, which has the merit of providing the image of acoustic field at any time.
Numerical simulation Assuming that the selected part inside the material is isotropic, workpiece material is steel, and its mechanical properties [6] are shown in Table 1 below.
References [1] SUN Ji-hua, LI Shu-guang,LI Shu-bang,etc.Finite Element Simulation to the Change of Ultrasonic Spectral Feature in Ultrasonic Testing[J].Journal of Shihezi University(Natural Science),2008, 26(1):101-105
The realization method of viscoelastic artificial boundary and input ground motions in general finite element software[J].Journal of Disaster Prevention and Mitigation Engineering.Vol.27,Suppl,Apr.2007.

The distance between the fixed target and the substrate materials was 60mm.
SiOx coating was stretched with elastic deformation and material yielding.
Owing to thin film molecular orientation, rearrangement, slip along the direction of external force, material yielded which meant the destruction of the original configuration.
[2] Liu Zhuang, Lin Jing, Sun Zhihui etc: Chinese Journal of Vacuum Science and Technology, May, vol. 29(2009).S1, p.94-97
[4] Zhang Junfeng, Chen Qiang, Liu Fuping etc: Chinese Journal of Vacuum Science and Technology.

In recent years, TiAlN coatings obtained by IBSD techniques were widely applied to improve the lifetime and performance of a wide variety of tool materials for their attractive properties such as high hardness, good wear and chemical stability [7].
Acknowledgements This work was supported by Natural Science Foundation of Shandong Province (Y2008F27) and Jinan Municipal Science & Technology Star Plan (20080101).
References [1] Joong-Ho Shin, Ho-Eop Yoon and Yuhua Zhang: International Journal of the Korean Society of Precision Engineering, Vol.3(2002), p50 [2] Giorgio Figliolini, Pierluigi Rea and Jorge Angeles: Mechanism and Machine Theory, Vol.41(2006), p1320 [3] Eing-Jer Wei, Hsin-Yi Lai and Chao-Kuang Chen: Journal of Materials Processing Technology, Vol. 100 (2000), p147 [4] Ronghua Wei: Surface and Coatings Technology, Vol. 203(2008), p 538 [5] C.
Miyake: J. of materials science, Vol. 35(2000), p 4193 [9] F.

Bonfield 1 1 Cambridge Centre for Medical Materials, Dept of Materials Science and Metallurgy, Cambridge University, Pembroke St, Cambridge, CB2 3QZ, United Kingdom; mqa20@cam.ac.uk 2 Bone Research Group, School of Clinical Medicine, Cambridge University, Box 157, Addenbrooke's Hospital, Cambridge CB2 2QQ, United Kingdom; dci20@mole.bio.cam.ac.uk 3 Orthopaedic Research Unit, Dept of Surgery, Cambridge University, Box 180, Addenbrooke's Hospital, Cambridge CB2 2QQ, United Kingdom Keywords: Silicon, orthosilicic acid, human osteoblasts, reverse transcriptase-polymerase chain reaction, collagen type I Abstract.
Materials and Methods Two separate experiments were carried out.
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[10] E M Carlisle et al., Science 167 & Calc.