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Passive noise control includes setting sound-proof room, sound-proof wall, blimp, sound barriers, and adoptingnoise absorption materials.
Tab.1 Absorption coefficient of three absorption materials building layout Noise value on west receiving point [dB] Noise value on east receiving point [dB] No buildings 54.1 51.0 One building on west side 40.2 53.27 Two buildings on both side 41.76 40.58 However, when there is a building on one side of the transformer, the noise value at the receiving point on the other side will increase due to the reflection of the structure.
Beijing: China Environmental Science Press, 2009 (in Chinese)
[7] GUO Ping, WEN Guilin: Journal of Highway and Transportation Research and Development.

Introduction Because of their low density, magnesium alloys are attractive materials for the automotive industry, where weight reduction is a design aim.
Latter might be no ideal materials for thixocasting or they require further optimisation of the processing parameters.
StJohn: Journal of Light Metals Vol. 2 (2002), p. 1-16 [4] C.
Mathieu, et. al.: Corrosion Science Vol. 44 (2002), p. 2737-2756 [6] B.L.

Initial calculations with the software, structure, material parameters are according to completion data.
Applied Mechanics and Materials Vols.44-47, p1558-1562, 2011
[3] N.J.Garder M.J.Lockman: Design Provisions for Drying Shrinkage and Creep of Normal Strength Concrete [J].Material Journal ACI, 2001(1):3-4
Shanxi Science & Technology of Communications, 2006(3):44-46

Research on the Dynamic Characteristics of Master Cylinder in the Hydraulic System on Concrete Pump Haibo Xie1,a, Shuyong Lin1, Huayong Yang1, Yu Zhen2, Jin Zhang2 1State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, Zhejiang, 310027, China 2Zoomlion Heavy Industry Science & Technology Development Co., Ltd, Changsha, Hunan, 410013, China ahbxie@zju.edu.cn Keywords: concrete pump, hydraulic system, pumping circuit, dividing circuit, simulation Abstract.
Material output valve unit switches quickly, then the pressure of accumulator 13 drops and the swashplate angle of constant pressure pump 12 increases, the accumulator 13 then receives oil from constant pressure pump 12 again.
The pilot directional valve 14 changes the position of hydraulic directional valve 15, then the position of material output valve changes and sends a reversing signal to the pilot directional valve 2, which changes the position of hydraulic directional valve 3, then master cylinder 4 retracts and master cylinder 5 extends, the pumping cycle circulates [5,6]. 1- the variable displacement pump; 2, 14- pilot directional valve; 3,15- hydraulic directional valve; 4,5- master cylinder; 6, 7, 8, 9- damping u-tube; 10, 11- pressure differential valve; 12- constant pressure pump; 13- accumulator; 16, 17-oscillating cylinder; 18, 19-relief valve; Fig. 1 Hydraulic system Simulation Analysis Simulation Model.
[2] Yitong Chen: Concrete Machinery “In Chinese” (China Building Materials Industry Press, 2002)
Journal A.C.I, 1977, 74(9)

And we also added a copper raw material in carbon fiber, molybdenum disulfide, PTFE sheet materials to reduce the long-term creep deformation under pressure to increase the stiffness of PTFE plate and surface smoothness.
Bridge is basically the same coefficient of static friction, dynamic friction coefficient but the ball and socket joints have been much greater than that level, this will result in the course of a larger traction, so to have higher mechanical and material requirements. 5.
Journal of Wuhan University of Technology, 2007 (3) :400-403
Bridge, Transportation Science, 2002:326

Materials and methods Materials.
Food Science and Technology, 2007, 33 (5): 97 – 100 (in Chinese) [2] Anthon GE, Barrett DM.
Environment project academic journal, 2007, 1 (1): 37 -39 [6] Lingxi Bu, Jie Lu, Ruifeng Yang.

Acknowledgements This work was supported by the PolHEMT Project under the Applied Research Programme of the National Centre for Research and Development, Contract Number PBS1/A3/9/2012, JU ENIAC Project LAST POWER Large Area silicon carbide Substrates and heTeroepitaxial GaN for POWER device applications Grant agreement no. 120218 and JU ENIAC Project MERCURE Micro and Nano Technologies Based on Wide Band Gap Materials for Future Transmitting Receiving and Sensing Systems Grant agreement n° 120220, NANOTEC: Nanostructured materials and RF-MEMS RFIC/MMIC technologies for highly adaptive and reliable RF systems Grant agreement no.: FP7-ICT-2011-7 as well as the Greek General Secretariat for Research and Technology, contract SAE 013/8 - 2009SE 01380012.
Hu, Journal of Alloys and Compounds 509, 3656 (2011)
Ge, Semiconductor Science and Technology 17, 957 (2002)

Suspended four-dimensional motor-driven adjusting mount structure with high resolution WANG Jin Song1,a HE Xiao Xuan2,b AN Zhi Yong3,c 1 2 3Changchun University of Science and Technology,Institute of OptoElectronic Engineering，Jilin Province，Changchun City，China aoldier_1973@163.com ,birisyoohoo@sina.com,can_zhiyong@vip.sohu.com Keyword：Four-dimensional adjusting mount, high resolution, statics analysis Abstract.
Statics analysis is taken by importing the 3 d model, loading material, meshing, loading boundary conditions and solving steps, as shown in figure 4.
By analysis of adjusting plate, tension spring and other components under the maximum overload at work, Size design and material selection meets the design requirements of adjusting frame load 37 kg or less.
Choices of other the structure and material of mechanical parts, the following support plate, guide rail brackets are similar to the support plate, due to the space of the paper, the description is no longer here.
Journal of Harbin Institute of Technology, Vol.37 No.11，Nov.2005:1472-1475 [2] WANG Sheng-huai, CHEN Yu-rong,WANG Shu-zhen,XIE Tie-bang.Design of 3Dprecision displacement system[J] .

In order to access this research, a matrix that classifies each system’s programmatic objectives, electromechanical makeup, material, and building skin typology was created (Figure 1).
In addition to this, when rail are subsided they remain the thickness of all the material folded together.
Climate Adaptive Building Shells, Master of science thesis, TU Einhoven, 2010 [3] U.
Sjarifudin, “Adaptive Building Envelope System using Parametric Camshaft Mechanism for Sustainale Building,” Applied Mechanics and Materials Vol. 232, 919-924, (2012) [6] C.
Journal of Building Performance Simulation, 2008,1(1):57–65. [9] M.A.

Acknowledgments This work was supported by the National Science Council of Taiwan through grant numbers NSC 99-2221-E-035-101-MY3.
Tang, Advanced Materials Research, Vol. 383-390 (2012), p. 6156-6161 [2] R.P.
Cheng, Journal of Magnetism and Magnetic Materials, Vol. 304 (2006), p. e430 [7] D.