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From the angle of filling strength and resilient modulus, these three kinds of rocks can be used as filling material in roadbed construction.
Bulletin of Chinese Academy of Sciences, 2007,22(2), pp.126-131
Journal of Mountain Science. 2006,24(5),pp.531-538
Journal of Taiyuan University of Technology, 2005,3(61), pp.44-47
Chinese Journal of Rock Mechanics and Engineering,2006,26(9),pp.1729-1734.

According to Chinese technical standard for metro shield tunneling construction (DGTJ08-2041-2008), the parameters of the circular tunnel are set as: the diameter is 6m; the thickness of lining is 0.4m; the material is C50 concrete, with density of 2450, elastic modulus of 34.5GPa and Poisson's ratio of 0.167.
(in Chinese) [2] Zhenpeng Liao: Introduction to Wave Motion Theories for Engineering, Science Press, Beijing (2002).
[4] Jinbo Liu, Yixin Du, Qiushi Yan: Viscous-spring artificial boundaries and Seismic input in common FEM software, Journal of Disaster Prevention and Mitigation Engineering, Vol.27, Suppl.
(in Chinese) [6] Chenghsun Chen, Taitien Wang, Tsanhwei Huang: Case Study of Earthquake-Introduced Damage Patterns of Rock Tunnel and Associated Reason, Chinese Journal of Rock Mechanics and Engineering, Vol.30 (1) (2011), p. 45-57.
Stiros: Earthquakes and Seismic Faulting: Effects on Tunnels, Turkish Journal of Earth Sciences (Turkish J.

In addition, the teachers should not wear clothes with tiny stripes or grids, because these patterns will lead to "mohr effect" [4] which is called in the image processing science, and produces flicker stripes.
Clip the serious error in speaking when teaching and some bad video material.
[2] Yingshan Tang, Minhong Dong, Technical design in the video cases of the teacher training [J], China academic journal electronic publishing journal, 2005 226
[3] Zhong quan Chen, The discuss on the filmed the classroom videotapes of the quality courses [J], Guangxi Chinese Medical University journal, 2008 3 (11)
[7] Yuhong Xia, Talking on the demonstration-teaching videotapes editing skills [J], China science and technology information, 2005.

Features of creation of porous nanostructured oxides of transition materials on an example of niobium are considered.
TiO2 nanotubes: Self-organized electrochemical formation, properties and applications, Current Opinion in Solid State and Materials Science. 11 (2007) 3–18
Materials Science and Engineering B. 139 (2007) 1–23
Journal of Electrochemical Science and Engineering. 4(2) (2014) 75-83
Deribo, Formation of nanostructures on the basis of porous anodic niobium oxide, Functional materials. 26(4) (2019) 729–733

Currently, the material is mainly used in liquid-crystal displays (LCDs) and e-papers.
The difference between the structures is the channel material which is Si or ZnO or IGZO.
Wu, "Performance of Inversion, Accumulation, and Junctionless Mode n-Type and p-Type Bulk Silicon FinFETs With 3-nm Gate Length," in IEEE Electron Device Letters, vol. 36, no. 7, July 2015, pp. 645-647 [7] Hideaki Tsuchiya; Yoshinari Kamakura, "2-d materials and devices," in Carrier Transport in Nanoscale MOS Transistors, IEEE, 2016, pp.191-246 [8] N.M.J.
[17] B.Buvaneswari, N.B.Balamurugan., “2D Analytical modeling and simulation of dual material DG MOSFET for biosensing application” in International Journal of Electronics and Communication (AEU), ScienceDirect, vol. 99, February 2019, Pages 193-200 [18] Hwaiyu Geng, CMfgE, PE.
Korean, vol. 55, no. 5, Nov. 2009, pp. 1906–1909 [28] K.Sowmya, N.B.Balamurugan, V.Parvathy, “A 2-D Modeling od Fe doped dual material gate AlGaN/AIN/GaN high electron mobility transistors for high frequency applications” International Journal of Electronics and Communication., vol., 103, March 2019 pp. 46-56

The production cycle of shafts is longer, and quantities of materials is larger, so study of repair technology of shaft is consistent with the goal of green manufacturing, and can promote economic development. 1.
Surface preparation of shafts refers to the purification and roughing treatment of the substrate surface to meet requirements of cleanliness and roughness, so that the coating can combine with substrate materials. 2.1.2 Preheating of shafts in boats and ships The purpose of preheating is to remove water of the surface adsorption, reduce shrinkage stress during the cooling, and improve the bonding strength.
Arc spraying has the arc as heat source, so spraying material must be conductive, usually only metal materials (non-metallic materials can be sprayed if it is cored wires) [4].
Journal of Hunan Institute Engineering, 2011, 21(2): 25~27 [3] Wang Chun-yu, Bu Fan-yu.
Automobile Technology and Material, 2004, 12: 3-5 [10] Wu Ding-cai.

LSP is not a thermal rather a mechanical process for treating materials.
[5] Deng Qilin, Yu Chengye, Zhang Yongkong, Tang Yaxin, experimental research of the improvement of properties of lase shocked aviation aluminium alloys against fatigue fracture, Chinese Journal of Laser, Vol.
Mukherjee, laser shock processing on CVD-processed alumina coat carbide inserts, the Third Pacific Rim International Conference on Advanced Materials and Processing
[8] Zhang Yongkong, study on improvement fatigue life of aviation materials by laser shock strengthening, PhD. thesis.
Hallouin, Comparison of two new surface treatment process, Laser-induced shock waves and primary explosive: application of fatigue behaviour, Material Science and Engineering A 156(1992).

The optimal design of the topology of continuous structures is achieved by methods adopting the approach of material distribution over a fixed reference region[3].
Silva,and Noboru Kikuchi,"Advances in computational design and optimization with application to MEMS",International Journal For Numerical Methods In Engineering,2001
[6] Fabio Peano and Tiziana Tambosso,"Design and Optimization of a MEMS Electret-Based Capacitive Energy Scavenger",Journal Of Microelectromechanical Systems, Vol. 14, No. 3, June 2005
[10]Aniket Singh, A Amalin Prince, V P Agrawal,"Design Optimization & Comparison of RF Power Sensors based on MEMS ",International Journal of Recent Trends in Engineering, Vol 1, No. 4, May 2009
Kalalbandi,"Simulation Of Cantilever Based Rf-Mems Switch Using Coventorware", World Journal of Science and Technology, pp.149-153,2011

Return material authorization was the metric used by most respondents (49.6%), followed by customer scorecards (34.7%) and return goods authorization (15.7%).
Sharma, The association between ISO 9000 certification and financial performance, The International Journal of Accounting, 40(2) (2005) 151–172
Kirsch, The financial impact of ISO 9000 certification in the United States: An empirical analysis, Management Science, 51(7) (2005) 1046–1059
Dow, The business value of quality management systems certification: Evidence from Australia and New Zealand, Journal of Operations Management, 15(1) (1997) 1–18
Häversjö, The financial effects of ISO 9000 registration for Danish companies, Managerial Auditing Journal, 15(1/2) (2000) 47–52

However, these materials have the characteristics of high strength, corrosion resistance and high temperature resistance.
If some special elements are added into the materials, superior performance will be obtained, and at the same time the materials will be particularly difficult to milling.
At the same time, the chemical reaction may be caused between the blades materials and tools materials which will exacerbate crater wear of tools (as shown in Fig. 3).
However, cutting machinability of materials determine new engine that it is very difficult to be manufactured.
Liu, etc: Mechanical Science And Technology, Vol. 22(2003), No. 2, pp. 177-178.