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Introduction Electrostatic actuators are small variable films consisting of several layers with different materials that can give rise to mechanical motions in response to an applied voltage.
One of the materials is chosen as the assumed material ().
The widths of the other materials are given by , where is the Young’s modulus of the material in question.
Timoshenko: Journal of the Optical Society of America, Vol11, (1925),pp.233-255
[5] JianYu Fu, DaPeng Chen, TianChun Ye etc: Science in China Series E: Technological Sciences Vol. 52, No.5, (2009), pp.1167-1170.

Sherman, Light weight materials for automotive applications, Materials Characterization, 35(1) (1995) 3-9
[3] J.Hirsch, Aluminium alloys for automotive application, In Materials Science Forum, Trans.
Metallurgical and Materials Transactions A, 53(9), (2022)3341-3356
Materials Today: Proceedings, 47, (2021)7086-7090
Materials Letters,(2021)304, pp 130733.

It is material basis to social development.
Water resources should be conserved according to law and science.
We must totally utilize various high and new technologies, life and new materials according to conditions in all aspects such as hydrology, water resources monitoring, evaluation, planning, management, development, utilization, conservation, protection and flood prevention.
Agricultural water resources reasonable use study in SongShan country of Chifeng city [J] journal of Chifeng institute: natural science edition, Vol. 22 (2006), p. 41-42 [4] Xiqin Wang, lilly.
Journal of arid zone resources and environment, Vol. 21 (2007), p. 79-83 [5] Xinmin Xie, Wenjun Zhao, YuanSheng Pei, etc.

They are applied in fluorescent probe, luminescence materials, life science and technology prospects.
Acknowledgment The work is supported by TianJin Natural Science Foundation (NO.09JCYBJC02700) References [1] Chen Ye, Cai Weimin.
Preparation and Fluorescence Properties of Rare Earth (Eu3+ and Ga3+) Complexes with Benzoic Acid and 1,10-Phenanthroline,J,Chinses Journal of Rare Metals,2005, 29（6）:865~870 [2] BAO Jinrong, ZHU Xiaowei, Wang Zhiliang.
Journal ofNatural Science of Hunan Nor malUniversity, 2008, 31 (1): 82~84
Beijing: Science Press, 2000.224-1411 [6] PAN Yuanfeng, XIAO Huining, HE Beihai.

Preparation and Characterization of Diatomite Supported Cu-doped TiO2 Photocatalysts Yanxi Deng*1,a, Chuanchuan Liu2,b, Guang Yangc 1School of Materials Science and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing, 100083, P.R.China 2Tianjin Jingwei Electric Wire Co., Ltd., Chuangye Road, Jinnan District, Tianjin, 300353, P.R.China adengyx@cugb.edu.cn mail, blcc860108@163.com, c yangguang228@126.com Keywords: Cu-doped TiO2 nanoparticles, Diatomite; Visible light; Photocatalytic activity; Methylene blue Abstract.
The band gap energy of material can be calculated according to the equation .
Journal of rare earths, 24 (2006), p. 309-313 [9] X.W Cheng, X.J Yua, Z.P Xing.
Journal of Physics and Chemistry of Solids, 74 (2013), p. 924–928 [11] H.
Applied Surface Science, 258 (2012), p.6136-6141 [16] B.

Introduction Soil is the oldest engineering material applied in almost every kinds of engineering construction, such as building construction, road and bridge, side slope stabilization, cavern excavation.
Based on engineering actual situation, the calculation region shall be made up of various materials with thermal parameters and soil characteristic parameters shown in table 1.
Jason, "A model for freeze-thaw cycling of the South Pole Station exterior sheathing", Cold Reions Sciences and Technology, vol 52, 2008, p.254-261
Lewis, "Coupling temperature to a double-porosity model of deformable porous media", International Journal for Numerical Methods in Engineering, vol 49, 2000, p.421-438
Roegiers, "Fluid flow and heat flow in deformable fractured porous media", International Journal of Engineering Science, vol 32, 1994, p.1615-1633

The sol-gel method don’t obtain pure nano-copper oxide, so the material has poor desulfurization activity.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51108144), Natural Science Foundation of Heilongjiang Province of China (E201146) and Provincial Students Innovation and Entrepreneurship training program of Harbin University of Science and Technology (201210214015).
Critical Reviews in Environmental Science and Technology 41(10):915-950(2011)
Chinese Journal of Inorganic Chemistry 26(2):115-118(2006)
Chinese Journal of Environmental Engineering 5(3): 627-630(2011)

Experimental materials and mix program Experimental materials.
Construction and Building Materials 165 (2018): 1-10
Scientific Journal of King Faisal University (Basic and Applied Sciences) 19.2 (2018): 1440H
Materials & Design, 2012, 34:389-400
Materials & Structures, 2005, 38(2): 229

E309Nb welding rod, ER310 welding wire, and ER309L welding wire were used as cladding filling materials, and ER50-6 welding wire was used as base-layer filling material for welding.
The microstructure observation of the welded joints after aging were conducted to determine the influence of welding materials on microstructure.
Figure 2 shows the influence of welding materials on the fusion zone for 304 stainless steel side.
The cause is that it is affected by chemical element content in the filled welding materials
IEEE Journal of Quantum Electronics, IEEE.

Introduction Micro ultrasonic machining (micro USM) is the rationalized version of the ultrasonic machining process which is popular for machining of hard and brittle materials such as silicon, glass and ceramics.
In order to minimize tool wear, tools should be constructed from relatively ductile materials such as stainless steel, brass and mild steel [5].
Q, Application of USM to Micromachining by On-the-machine Tool Fabrication, International Journal of Electrical Machining, No. 2, pp. 31-36, (1997)
Kuo, On-line tool wear monitoring during ultrasonic machining using tool resonance frequency, Journal of Materials Processing Technology, Volume 123, Issue 1, 10 April 2002, Pages 80-84
Tandon, Study of 3D Micro Ultrasonic Machining, ASME Journal of Manufacturing Science and Engineering, Vol. 126, (2004) 727-732