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Design of Intelligent Underground Sound Bird Repellent System Based on Wireless Communication Network YIN Xijie1,a, LinJian2,b, SHAO Zengzhen2,c,* 1 School of Information and Technology, Shandong Women’s University, Jinan, 250002, China; 2 School of Information Science and Engineering, Shandong Normal University,Jinan,250014,China axijiesd@126.com, b512642360@qq.com, cshaozengzhen@163.com Key Words: intelligent bird repellent, wireless communication, short wave station Abstract: Aimed at problems nowadays existing in airport bird drive, an intelligent underground sound repellent system is designed.
The above bird repellent devices have some defects, which are shown in: 1) with large size, big height and hard material, they can’t be assembled close to the airport runway, thus weak in driving birds; 2) most of them adopt random driving method, and space-time cross relations between birds and the plane isn’t considered; 3) long time exposed to external environment, the device costs a lot in maintenance; 4) the device operates independently, thus effective linkage is hard to develop.
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Step 8: Remove PR, and screen print plastic or polymer material around the inclinometer as dam bar, then put a cap on the dam bar and curing, before sealing it one can fill it with xenon gas.
Acknowledgments This research was supported by National Science Council Taiwan, R.O.C. with contract NSC-101-2622-E-216-001-CC3, 101-2221-E-216-006-MY2, and 101-2221-E-216-019-.
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In summary, the digital strong motion records baseline drift is due to inaccurate response from the instrument, fatigue electromagnetic noise, sensor material, background noise and ground tilt or rotate and bring the pollution of ground vibration signal[12].
Acknowledgements This work was financially supported by Specific Item of Fundamental Scientific Research in Institute of Engineering Mechanics Fund (2013B20), National Natural Science Foundation of China Fund (51308517), Heilongjiang Postdoctoral Fund(LBH-Z13178), National Natural Science Foundation of China Fund (51208234).
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Table 3 The spring and damp value on viscoelastic artificial boundaries Material Damp (KN.s/m) Stiffness (MN/m) Embankment fill 346.41 1.33 Rubber cushion 579.66 4.06 Pile 8485.28 724.64 Subsoil 1 227.07 1.28 Subsoil 2 286.36 1.82 Calculation schemes As the variation of dynamic stress in subgrade is associated with train type, running speed and track type, which make the process quite complicated.
Fig 3 The load-time curve Comparative analysis between the results of numerical study and field test China Academy of Railway Sciences has conducted a field test of the cross-section (Fig. 1) to investigate the transfer characteristics of dynamic stress by setting up a dynamic testing system.
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Material and analysis The hydrogen and oxygen stable isotopes data of 102 shallow groundwater samples and 11 lake water samples were collected from the China's stable isotope geochemistry database provided by China Geological Survey Bureau (http://www.geoscience.cn/isogeochem/).
Acknowledgements This work was financially supported by the Groundwater Survey Project for NingDong Energy Base, Ordos Basin (1212011121162) and the Projects of Overseas Students’ Science and Technology Activities, 2011.
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At high frequency, the magnetic flux will not be able to penetrate fully to the material due to skin effect and this will weaken its magnetic field distribution [2].
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Father Henry of French science management Method invite the Er(Henry Fayol) announce in 1916 of 《industrial management with general management (General and Indus- trialM anagement)》 in the first time lead the thought of risk management into management to manage in, but don't form complete system.
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A clear example of the current interest in developing composite materials and technology is the development by Lockheed Martin of the new X-33, single-stage-to-orbit reusable launch vehicle (SSTO RLV) for NASA, which essentially uses composite materials in its manufacturing.
Residual stresses should have important impact on the mechanical behaviour of composite systems, similarly to its observed influence on metallic materials.
However, no reliable methods exist yet to determine non-uniform in-depth residual stress profiles on this kind of materials.
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In addition, defects in equipment, tooling and materials associated with factory defects and violations of the operating mode can also lead to abnormal situationsand a decrease in the level of environmental safety [4].
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